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106 lines
3.9 KiB
106 lines
3.9 KiB
2 years ago
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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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import os
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import os.path as osp
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import argparse
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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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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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if __name__ == "__main__":
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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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