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83 lines
3.6 KiB
83 lines
3.6 KiB
# 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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import os |
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import os.path as osp |
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import argparse |
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from math import ceil |
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import paddlers |
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from tqdm import tqdm |
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from utils import Raster, save_geotiff, time_it |
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def _calc_window_tf(geot, loc): |
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x, hr, r1, y, r2, vr = geot |
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nx, ny = loc |
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return (x + nx * hr, hr, r1, y + ny * vr, r2, vr) |
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@time_it |
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def split_data(image_path, mask_path, block_size, save_dir): |
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if not osp.exists(save_dir): |
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os.makedirs(save_dir) |
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os.makedirs(osp.join(save_dir, "images")) |
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if mask_path is not None: |
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os.makedirs(osp.join(save_dir, "masks")) |
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image_name, image_ext = image_path.replace("\\", |
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"/").split("/")[-1].split(".") |
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image = Raster(image_path) |
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mask = Raster(mask_path) if mask_path is not None else None |
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if mask is not None and (image.width != mask.width or |
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image.height != mask.height): |
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raise ValueError("image's shape must equal mask's shape.") |
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rows = ceil(image.height / block_size) |
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cols = ceil(image.width / block_size) |
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total_number = int(rows * cols) |
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with tqdm(total=total_number) as pbar: |
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for r in range(rows): |
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for c in range(cols): |
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loc_start = (c * block_size, r * block_size) |
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image_title = image.getArray(loc_start, |
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(block_size, block_size)) |
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image_save_path = osp.join(save_dir, "images", ( |
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image_name + "_" + str(r) + "_" + str(c) + "." + image_ext)) |
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window_geotf = _calc_window_tf(image.geot, loc_start) |
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save_geotiff(image_title, image_save_path, image.proj, |
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window_geotf) |
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if mask is not None: |
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mask_title = mask.getArray(loc_start, |
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(block_size, block_size)) |
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mask_save_path = osp.join(save_dir, "masks", |
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(image_name + "_" + str(r) + "_" + |
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str(c) + "." + image_ext)) |
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save_geotiff(mask_title, mask_save_path, image.proj, |
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window_geotf) |
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pbar.update(1) |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser(description="input parameters") |
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parser.add_argument("--image_path", type=str, required=True, \ |
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help="Path of input image.") |
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parser.add_argument("--mask_path", type=str, default=None, \ |
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help="Path of input labels.") |
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parser.add_argument("--block_size", type=int, default=512, \ |
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help="Size of image block. Default value is 512.") |
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parser.add_argument("--save_dir", type=str, default="dataset", \ |
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help="Directory to save the results. Default value is 'dataset'.") |
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args = parser.parse_args() |
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split_data(args.image_path, args.mask_path, args.block_size, args.save_dir)
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