Bobholamovic
2 years ago
commit
9fd3b7b00e
17 changed files with 854 additions and 195 deletions
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# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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|
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import os |
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import os.path as osp |
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import math |
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from abc import ABCMeta, abstractmethod |
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from collections import Counter, defaultdict |
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|
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import numpy as np |
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from tqdm import tqdm |
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|
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import paddlers.utils.logging as logging |
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|
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|
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class Cache(metaclass=ABCMeta): |
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@abstractmethod |
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def get_block(self, i_st, j_st, h, w): |
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pass |
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|
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|
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class SlowCache(Cache): |
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def __init__(self): |
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super(SlowCache, self).__init__() |
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self.cache = defaultdict(Counter) |
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|
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def push_pixel(self, i, j, l): |
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self.cache[(i, j)][l] += 1 |
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|
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def push_block(self, i_st, j_st, h, w, data): |
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for i in range(0, h): |
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for j in range(0, w): |
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self.push_pixel(i_st + i, j_st + j, data[i, j]) |
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|
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def pop_pixel(self, i, j): |
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self.cache.pop((i, j)) |
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|
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def pop_block(self, i_st, j_st, h, w): |
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for i in range(0, h): |
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for j in range(0, w): |
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self.pop_pixel(i_st + i, j_st + j) |
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|
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def get_pixel(self, i, j): |
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winners = self.cache[(i, j)].most_common(1) |
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winner = winners[0] |
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return winner[0] |
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|
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def get_block(self, i_st, j_st, h, w): |
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block = [] |
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for i in range(i_st, i_st + h): |
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row = [] |
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for j in range(j_st, j_st + w): |
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row.append(self.get_pixel(i, j)) |
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block.append(row) |
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return np.asarray(block) |
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|
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|
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class ProbCache(Cache): |
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def __init__(self, h, w, ch, cw, sh, sw, dtype=np.float32, order='c'): |
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super(ProbCache, self).__init__() |
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self.cache = None |
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self.h = h |
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self.w = w |
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self.ch = ch |
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self.cw = cw |
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self.sh = sh |
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self.sw = sw |
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if not issubclass(dtype, np.floating): |
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raise TypeError("`dtype` must be one of the floating types.") |
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self.dtype = dtype |
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order = order.lower() |
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if order not in ('c', 'f'): |
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raise ValueError("`order` other than 'c' and 'f' is not supported.") |
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self.order = order |
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|
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def _alloc_memory(self, nc): |
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if self.order == 'c': |
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# Colomn-first order (C-style) |
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# |
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# <-- cw --> |
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# |--------|---------------------|^ ^ |
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# | || | sh |
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# |--------|---------------------|| ch v |
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# | || |
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# |--------|---------------------|v |
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# <------------ w ---------------> |
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self.cache = np.zeros((self.ch, self.w, nc), dtype=self.dtype) |
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elif self.order == 'f': |
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# Row-first order (Fortran-style) |
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# |
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# <-- sw --> |
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# <---- cw ----> |
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# |--------|---|^ ^ |
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# | | || | |
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# | | || ch |
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# | | || | |
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# |--------|---|| h v |
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# | | || |
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# | | || |
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# | | || |
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# |--------|---|v |
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self.cache = np.zeros((self.h, self.cw, nc), dtype=self.dtype) |
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|
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def update_block(self, i_st, j_st, h, w, prob_map): |
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if self.cache is None: |
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nc = prob_map.shape[2] |
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# Lazy allocation of memory |
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self._alloc_memory(nc) |
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self.cache[i_st:i_st + h, j_st:j_st + w] += prob_map |
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|
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def roll_cache(self, shift): |
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if self.order == 'c': |
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self.cache[:-shift] = self.cache[shift:] |
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self.cache[-shift:, :] = 0 |
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elif self.order == 'f': |
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self.cache[:, :-shift] = self.cache[:, shift:] |
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self.cache[:, -shift:] = 0 |
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|
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def get_block(self, i_st, j_st, h, w): |
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return np.argmax(self.cache[i_st:i_st + h, j_st:j_st + w], axis=2) |
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|
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class OverlapProcessor(metaclass=ABCMeta): |
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def __init__(self, h, w, ch, cw, sh, sw): |
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super(OverlapProcessor, self).__init__() |
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self.h = h |
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self.w = w |
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self.ch = ch |
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self.cw = cw |
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self.sh = sh |
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self.sw = sw |
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@abstractmethod |
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def process_pred(self, out, xoff, yoff): |
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pass |
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class KeepFirstProcessor(OverlapProcessor): |
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def __init__(self, h, w, ch, cw, sh, sw, ds, inval=255): |
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super(KeepFirstProcessor, self).__init__(h, w, ch, cw, sh, sw) |
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self.ds = ds |
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self.inval = inval |
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|
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def process_pred(self, out, xoff, yoff): |
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pred = out['label_map'] |
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pred = pred[:self.ch, :self.cw] |
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rd_block = self.ds.ReadAsArray(xoff, yoff, self.cw, self.ch) |
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mask = rd_block != self.inval |
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pred = np.where(mask, rd_block, pred) |
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return pred |
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|
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class KeepLastProcessor(OverlapProcessor): |
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def process_pred(self, out, xoff, yoff): |
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pred = out['label_map'] |
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pred = pred[:self.ch, :self.cw] |
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return pred |
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|
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class AccumProcessor(OverlapProcessor): |
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def __init__(self, |
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h, |
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w, |
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ch, |
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cw, |
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sh, |
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sw, |
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dtype=np.float16, |
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assign_weight=True): |
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super(AccumProcessor, self).__init__(h, w, ch, cw, sh, sw) |
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self.cache = ProbCache(h, w, ch, cw, sh, sw, dtype=dtype, order='c') |
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self.prev_yoff = None |
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self.assign_weight = assign_weight |
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|
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def process_pred(self, out, xoff, yoff): |
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if self.prev_yoff is not None and yoff != self.prev_yoff: |
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if yoff < self.prev_yoff: |
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raise RuntimeError |
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self.cache.roll_cache(yoff - self.prev_yoff) |
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pred = out['label_map'] |
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pred = pred[:self.ch, :self.cw] |
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prob = out['score_map'] |
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prob = prob[:self.ch, :self.cw] |
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if self.assign_weight: |
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prob = assign_border_weights(prob, border_ratio=0.25, inplace=True) |
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self.cache.update_block(0, xoff, self.ch, self.cw, prob) |
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pred = self.cache.get_block(0, xoff, self.ch, self.cw) |
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self.prev_yoff = yoff |
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return pred |
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|
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def assign_border_weights(array, weight=0.5, border_ratio=0.25, inplace=True): |
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if not inplace: |
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array = array.copy() |
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h, w = array.shape[:2] |
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hm, wm = int(h * border_ratio), int(w * border_ratio) |
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array[:hm] *= weight |
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array[-hm:] *= weight |
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array[:, :wm] *= weight |
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array[:, -wm:] *= weight |
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return array |
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|
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def read_block(ds, |
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xoff, |
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yoff, |
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xsize, |
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ysize, |
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tar_xsize=None, |
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tar_ysize=None, |
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pad_val=0): |
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if tar_xsize is None: |
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tar_xsize = xsize |
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if tar_ysize is None: |
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tar_ysize = ysize |
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# Read data from dataset |
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block = ds.ReadAsArray(xoff, yoff, xsize, ysize) |
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c, real_ysize, real_xsize = block.shape |
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assert real_ysize == ysize and real_xsize == xsize |
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# [c, h, w] -> [h, w, c] |
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block = block.transpose((1, 2, 0)) |
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if (real_ysize, real_xsize) != (tar_ysize, tar_xsize): |
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if real_ysize >= tar_ysize or real_xsize >= tar_xsize: |
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raise ValueError |
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padded_block = np.full( |
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(tar_ysize, tar_xsize, c), fill_value=pad_val, dtype=block.dtype) |
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# Fill |
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padded_block[:real_ysize, :real_xsize] = block |
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return padded_block |
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else: |
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return block |
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|
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def slider_predict(predict_func, |
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img_file, |
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save_dir, |
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block_size, |
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overlap, |
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transforms, |
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invalid_value, |
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merge_strategy, |
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batch_size, |
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show_progress=False): |
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""" |
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Do inference using sliding windows. |
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Args: |
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predict_func (callable): A callable object that makes the prediction. |
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img_file (str|tuple[str]): Image path(s). |
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save_dir (str): Directory that contains saved geotiff file. |
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block_size (list[int] | tuple[int] | int): |
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Size of block. If `block_size` is list or tuple, it should be in |
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(W, H) format. |
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overlap (list[int] | tuple[int] | int): |
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Overlap between two blocks. If `overlap` is list or tuple, it should |
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be in (W, H) format. |
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transforms (paddlers.transforms.Compose|None): Transforms for inputs. If |
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None, the transforms for evaluation process will be used. |
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invalid_value (int): Value that marks invalid pixels in output image. |
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Defaults to 255. |
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merge_strategy (str): Strategy to merge overlapping blocks. Choices are |
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{'keep_first', 'keep_last', 'accum'}. 'keep_first' and 'keep_last' |
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means keeping the values of the first and the last block in |
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traversal order, respectively. 'accum' means determining the class |
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of an overlapping pixel according to accumulated probabilities. |
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batch_size (int): Batch size used in inference. |
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show_progress (bool, optional): Whether to show prediction progress with a |
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progress bar. Defaults to True. |
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""" |
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try: |
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from osgeo import gdal |
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except: |
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import gdal |
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if isinstance(block_size, int): |
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block_size = (block_size, block_size) |
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elif isinstance(block_size, (tuple, list)) and len(block_size) == 2: |
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block_size = tuple(block_size) |
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else: |
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raise ValueError( |
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"`block_size` must be a tuple/list of length 2 or an integer.") |
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if isinstance(overlap, int): |
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overlap = (overlap, overlap) |
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elif isinstance(overlap, (tuple, list)) and len(overlap) == 2: |
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overlap = tuple(overlap) |
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else: |
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raise ValueError( |
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"`overlap` must be a tuple/list of length 2 or an integer.") |
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|
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step = np.array( |
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block_size, dtype=np.int32) - np.array( |
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overlap, dtype=np.int32) |
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if step[0] == 0 or step[1] == 0: |
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raise ValueError("`block_size` and `overlap` should not be equal.") |
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|
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if isinstance(img_file, tuple): |
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if len(img_file) != 2: |
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raise ValueError("Tuple `img_file` must have the length of two.") |
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# Assume that two input images have the same size |
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src_data = gdal.Open(img_file[0]) |
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src2_data = gdal.Open(img_file[1]) |
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# Output name is the same as the name of the first image |
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file_name = osp.basename(osp.normpath(img_file[0])) |
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else: |
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src_data = gdal.Open(img_file) |
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file_name = osp.basename(osp.normpath(img_file)) |
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|
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# Get size of original raster |
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width = src_data.RasterXSize |
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height = src_data.RasterYSize |
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bands = src_data.RasterCount |
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|
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# XXX: GDAL read behavior conforms to paddlers.transforms.decode_image(read_raw=True) |
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# except for SAR images. |
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if bands == 1: |
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logging.warning( |
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f"Detected `bands=1`. Please note that currently `slider_predict()` does not properly handle SAR images." |
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) |
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if block_size[0] > width or block_size[1] > height: |
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raise ValueError("`block_size` should not be larger than image size.") |
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|
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driver = gdal.GetDriverByName("GTiff") |
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if not osp.exists(save_dir): |
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os.makedirs(save_dir) |
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# Replace extension name with '.tif' |
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file_name = osp.splitext(file_name)[0] + ".tif" |
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save_file = osp.join(save_dir, file_name) |
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dst_data = driver.Create(save_file, width, height, 1, gdal.GDT_Byte) |
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|
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# Set meta-information |
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dst_data.SetGeoTransform(src_data.GetGeoTransform()) |
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dst_data.SetProjection(src_data.GetProjection()) |
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|
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# Initialize raster with `invalid_value` |
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band = dst_data.GetRasterBand(1) |
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band.WriteArray( |
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np.full( |
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(height, width), fill_value=invalid_value, dtype="uint8")) |
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|
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if overlap == (0, 0) or block_size == (width, height): |
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# When there is no overlap or the whole image is used as input, |
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# use 'keep_last' strategy as it introduces least overheads |
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merge_strategy = 'keep_last' |
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|
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if merge_strategy == 'keep_first': |
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overlap_processor = KeepFirstProcessor( |
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height, |
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width, |
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*block_size[::-1], |
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*step[::-1], |
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band, |
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inval=invalid_value) |
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elif merge_strategy == 'keep_last': |
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overlap_processor = KeepLastProcessor(height, width, *block_size[::-1], |
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*step[::-1]) |
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elif merge_strategy == 'accum': |
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overlap_processor = AccumProcessor(height, width, *block_size[::-1], |
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*step[::-1]) |
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else: |
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raise ValueError("{} is not a supported stragegy for block merging.". |
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format(merge_strategy)) |
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|
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xsize, ysize = block_size |
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num_blocks = math.ceil(height / step[1]) * math.ceil(width / step[0]) |
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cnt = 0 |
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if show_progress: |
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pb = tqdm(total=num_blocks) |
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batch_data = [] |
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batch_offsets = [] |
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for yoff in range(0, height, step[1]): |
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for xoff in range(0, width, step[0]): |
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if xoff + xsize > width: |
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xoff = width - xsize |
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is_end_of_row = True |
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else: |
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is_end_of_row = False |
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if yoff + ysize > height: |
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yoff = height - ysize |
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is_end_of_col = True |
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else: |
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is_end_of_col = False |
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|
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# Read |
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im = read_block(src_data, xoff, yoff, xsize, ysize) |
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|
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if isinstance(img_file, tuple): |
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im2 = read_block(src2_data, xoff, yoff, xsize, ysize) |
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batch_data.append((im, im2)) |
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else: |
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batch_data.append(im) |
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|
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batch_offsets.append((xoff, yoff)) |
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|
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len_batch = len(batch_data) |
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|
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if is_end_of_row and is_end_of_col and len_batch < batch_size: |
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# Pad `batch_data` by repeating the last element |
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batch_data = batch_data + [batch_data[-1]] * (batch_size - |
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len_batch) |
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# While keeping `len(batch_offsets)` the number of valid elements in the batch |
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|
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if len(batch_data) == batch_size: |
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# Predict |
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batch_out = predict_func(batch_data, transforms=transforms) |
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|
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for out, (xoff_, yoff_) in zip(batch_out, batch_offsets): |
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# Get processed result |
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pred = overlap_processor.process_pred(out, xoff_, yoff_) |
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# Write to file |
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band.WriteArray(pred, xoff_, yoff_) |
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|
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dst_data.FlushCache() |
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batch_data.clear() |
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batch_offsets.clear() |
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|
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cnt += 1 |
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|
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if show_progress: |
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pb.update(1) |
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pb.set_description("{} out of {} blocks processed.".format( |
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cnt, num_blocks)) |
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|
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dst_data = None |
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logging.info("GeoTiff file saved in {}.".format(save_file)) |
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@ -0,0 +1,212 @@ |
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# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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|
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import os.path as osp |
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import tempfile |
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|
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import paddlers as pdrs |
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import paddlers.transforms as T |
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from testing_utils import CommonTest |
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|
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|
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class _TestSliderPredictNamespace: |
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class TestSliderPredict(CommonTest): |
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def test_blocksize_and_overlap_whole(self): |
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# Original image size (256, 256) |
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with tempfile.TemporaryDirectory() as td: |
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# Whole-image inference using predict() |
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pred_whole = self.model.predict(self.image_path, |
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self.transforms) |
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pred_whole = pred_whole['label_map'] |
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|
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# Whole-image inference using slider_predict() |
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save_dir = osp.join(td, 'pred1') |
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self.model.slider_predict(self.image_path, save_dir, 256, 0, |
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self.transforms) |
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pred1 = T.decode_image( |
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osp.join(save_dir, self.basename), |
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read_raw=True, |
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decode_sar=False) |
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self.check_output_equal(pred1.shape, pred_whole.shape) |
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|
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# `block_size` == `overlap` |
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save_dir = osp.join(td, 'pred2') |
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with self.assertRaises(ValueError): |
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self.model.slider_predict(self.image_path, save_dir, 128, |
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128, self.transforms) |
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|
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# `block_size` is a tuple |
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save_dir = osp.join(td, 'pred3') |
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self.model.slider_predict(self.image_path, save_dir, (128, 32), |
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0, self.transforms) |
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pred3 = T.decode_image( |
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osp.join(save_dir, self.basename), |
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read_raw=True, |
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decode_sar=False) |
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self.check_output_equal(pred3.shape, pred_whole.shape) |
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|
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# `block_size` and `overlap` are both tuples |
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save_dir = osp.join(td, 'pred4') |
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self.model.slider_predict(self.image_path, save_dir, (128, 100), |
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(10, 5), self.transforms) |
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pred4 = T.decode_image( |
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osp.join(save_dir, self.basename), |
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read_raw=True, |
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decode_sar=False) |
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self.check_output_equal(pred4.shape, pred_whole.shape) |
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|
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# `block_size` larger than image size |
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save_dir = osp.join(td, 'pred5') |
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with self.assertRaises(ValueError): |
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self.model.slider_predict(self.image_path, save_dir, 512, 0, |
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self.transforms) |
||||
|
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def test_merge_strategy(self): |
||||
with tempfile.TemporaryDirectory() as td: |
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# Whole-image inference using predict() |
||||
pred_whole = self.model.predict(self.image_path, |
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self.transforms) |
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pred_whole = pred_whole['label_map'] |
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|
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# 'keep_first' |
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save_dir = osp.join(td, 'keep_first') |
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self.model.slider_predict( |
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self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='keep_first') |
||||
pred_keepfirst = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
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decode_sar=False) |
||||
self.check_output_equal(pred_keepfirst.shape, pred_whole.shape) |
||||
|
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# 'keep_last' |
||||
save_dir = osp.join(td, 'keep_last') |
||||
self.model.slider_predict( |
||||
self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='keep_last') |
||||
pred_keeplast = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
||||
decode_sar=False) |
||||
self.check_output_equal(pred_keeplast.shape, pred_whole.shape) |
||||
|
||||
# 'accum' |
||||
save_dir = osp.join(td, 'accum') |
||||
self.model.slider_predict( |
||||
self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='accum') |
||||
pred_accum = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
||||
decode_sar=False) |
||||
self.check_output_equal(pred_accum.shape, pred_whole.shape) |
||||
|
||||
def test_geo_info(self): |
||||
with tempfile.TemporaryDirectory() as td: |
||||
_, geo_info_in = T.decode_image( |
||||
self.ref_path, read_geo_info=True) |
||||
self.model.slider_predict(self.image_path, td, 128, 0, |
||||
self.transforms) |
||||
_, geo_info_out = T.decode_image( |
||||
osp.join(td, self.basename), read_geo_info=True) |
||||
self.assertEqual(geo_info_out['geo_trans'], |
||||
geo_info_in['geo_trans']) |
||||
self.assertEqual(geo_info_out['geo_proj'], |
||||
geo_info_in['geo_proj']) |
||||
|
||||
def test_batch_size(self): |
||||
with tempfile.TemporaryDirectory() as td: |
||||
# batch_size = 1 |
||||
save_dir = osp.join(td, 'bs1') |
||||
self.model.slider_predict( |
||||
self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='keep_first', |
||||
batch_size=1) |
||||
pred_bs1 = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
||||
decode_sar=False) |
||||
|
||||
# batch_size = 4 |
||||
save_dir = osp.join(td, 'bs4') |
||||
self.model.slider_predict( |
||||
self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='keep_first', |
||||
batch_size=4) |
||||
pred_bs4 = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
||||
decode_sar=False) |
||||
self.check_output_equal(pred_bs4, pred_bs1) |
||||
|
||||
# batch_size = 8 |
||||
save_dir = osp.join(td, 'bs4') |
||||
self.model.slider_predict( |
||||
self.image_path, |
||||
save_dir, |
||||
128, |
||||
64, |
||||
self.transforms, |
||||
merge_strategy='keep_first', |
||||
batch_size=8) |
||||
pred_bs8 = T.decode_image( |
||||
osp.join(save_dir, self.basename), |
||||
read_raw=True, |
||||
decode_sar=False) |
||||
self.check_output_equal(pred_bs8, pred_bs1) |
||||
|
||||
|
||||
class TestSegSliderPredict(_TestSliderPredictNamespace.TestSliderPredict): |
||||
def setUp(self): |
||||
self.model = pdrs.tasks.seg.UNet(in_channels=10) |
||||
self.transforms = T.Compose([ |
||||
T.DecodeImg(), T.Normalize([0.5] * 10, [0.5] * 10), |
||||
T.ArrangeSegmenter('test') |
||||
]) |
||||
self.image_path = "data/ssst/multispectral.tif" |
||||
self.ref_path = self.image_path |
||||
self.basename = osp.basename(self.ref_path) |
||||
|
||||
|
||||
class TestCDSliderPredict(_TestSliderPredictNamespace.TestSliderPredict): |
||||
def setUp(self): |
||||
self.model = pdrs.tasks.cd.BIT(in_channels=10) |
||||
self.transforms = T.Compose([ |
||||
T.DecodeImg(), T.Normalize([0.5] * 10, [0.5] * 10), |
||||
T.ArrangeChangeDetector('test') |
||||
]) |
||||
self.image_path = ("data/ssmt/multispectral_t1.tif", |
||||
"data/ssmt/multispectral_t2.tif") |
||||
self.ref_path = self.image_path[0] |
||||
self.basename = osp.basename(self.ref_path) |
||||
Loading…
Reference in new issue