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105 lines
3.9 KiB
105 lines
3.9 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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import paddlers |
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import numpy as np |
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from PIL import Image |
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try: |
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from osgeo import gdal, ogr, osr |
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except ImportError: |
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import gdal |
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import ogr |
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import osr |
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from utils import Raster, save_geotiff, time_it |
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def _mask2tif(mask_path, tmp_path, proj, geot): |
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dst_ds = save_geotiff( |
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np.asarray(Image.open(mask_path)), tmp_path, proj, geot, |
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gdal.GDT_UInt16, False) |
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return dst_ds |
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def _polygonize_raster(mask_path, vec_save_path, proj, geot, ignore_index, ext): |
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if proj is None or geot is None: |
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tmp_path = None |
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ds = gdal.Open(mask_path) |
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else: |
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tmp_path = vec_save_path.replace("." + ext, ".tif") |
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ds = _mask2tif(mask_path, tmp_path, proj, geot) |
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srcband = ds.GetRasterBand(1) |
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maskband = srcband.GetMaskBand() |
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gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES") |
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gdal.SetConfigOption("SHAPE_ENCODING", "UTF-8") |
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ogr.RegisterAll() |
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drv = ogr.GetDriverByName("ESRI Shapefile" if ext == "shp" else "GeoJSON") |
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if osp.exists(vec_save_path): |
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os.remove(vec_save_path) |
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dst_ds = drv.CreateDataSource(vec_save_path) |
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prosrs = osr.SpatialReference(wkt=ds.GetProjection()) |
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dst_layer = dst_ds.CreateLayer( |
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"POLYGON", geom_type=ogr.wkbPolygon, srs=prosrs) |
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dst_fieldname = "CLAS" |
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fd = ogr.FieldDefn(dst_fieldname, ogr.OFTInteger) |
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dst_layer.CreateField(fd) |
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gdal.Polygonize(srcband, maskband, dst_layer, 0, []) |
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# TODO: temporary: delete ignored values |
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dst_ds.Destroy() |
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ds = None |
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vec_ds = drv.Open(vec_save_path, 1) |
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lyr = vec_ds.GetLayer() |
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lyr.SetAttributeFilter("{} = '{}'".format(dst_fieldname, str(ignore_index))) |
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for holes in lyr: |
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lyr.DeleteFeature(holes.GetFID()) |
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vec_ds.Destroy() |
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if tmp_path is not None: |
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os.remove(tmp_path) |
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@time_it |
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def mask2shape(srcimg_path, mask_path, save_path, ignore_index=255): |
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vec_ext = save_path.split(".")[-1].lower() |
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if vec_ext not in ["json", "geojson", "shp"]: |
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raise ValueError( |
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"The extension of `save_path` must be 'json/geojson' or 'shp', not {}.". |
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format(vec_ext)) |
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ras_ext = srcimg_path.split(".")[-1].lower() |
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if osp.exists(srcimg_path) and ras_ext in ["tif", "tiff", "geotiff", "img"]: |
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src = Raster(srcimg_path) |
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_polygonize_raster(mask_path, save_path, src.proj, src.geot, |
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ignore_index, vec_ext) |
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src = None |
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else: |
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_polygonize_raster(mask_path, save_path, None, None, ignore_index, |
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vec_ext) |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser() |
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parser.add_argument("--mask_path", type=str, required=True, \ |
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help="Path of mask data.") |
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parser.add_argument("--save_path", type=str, required=True, \ |
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help="Path to save the shape file (the extension is .json/geojson or .shp).") |
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parser.add_argument("--srcimg_path", type=str, default="", \ |
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help="Path of original data with geoinfo. Default to empty.") |
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parser.add_argument("--ignore_index", type=int, default=255, \ |
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help="The ignored index will not be converted to a value in the shape file. Default value is 255.") |
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args = parser.parse_args() |
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mask2shape(args.srcimg_path, args.mask_path, args.save_path, |
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args.ignore_index)
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