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- # Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- import codecs
- import cv2
- import numpy as np
- import argparse
- import geojson
- from tqdm import tqdm
- from utils import Raster, save_mask_geotiff, Timer
- def _gt_convert(x_geo, y_geo, geotf):
- a = np.array([[geotf[1], geotf[2]], [geotf[4], geotf[5]]])
- b = np.array([x_geo - geotf[0], y_geo - geotf[3]])
- return np.round(np.linalg.solve(a, b)).tolist() # 解一元二次方程
- @Timer
- def convert_data(image_path, geojson_path):
- raster = Raster(image_path)
- tmp_img = np.zeros((raster.height, raster.width), dtype=np.int32)
- geo_reader = codecs.open(geojson_path, "r", encoding="utf-8")
- feats = geojson.loads(geo_reader.read())["features"] # 所有图像块
- for feat in tqdm(feats):
- geo = feat["geometry"]
- if geo["type"] == "Polygon": # 多边形
- geo_points = geo["coordinates"][0]
- elif geo["type"] == "MultiPolygon": # 多面
- geo_points = geo["coordinates"][0][0]
- else:
- raise TypeError("Geometry type must be `Polygon` or `MultiPolygon`, not {}.".format(geo["type"]))
- xy_points = np.array([
- _gt_convert(point[0], point[1], raster.geot)
- for point in geo_points
- ]).astype(np.int32)
- # TODO: Label category
- cv2.fillPoly(tmp_img, [xy_points], 1) # 多边形填充
- ext = "." + geojson_path.split(".")[-1]
- save_mask_geotiff(tmp_img, geojson_path.replace(ext, ".tif"), raster.proj, raster.geot)
- parser = argparse.ArgumentParser(description="input parameters")
- parser.add_argument("--image_path", type=str, required=True, \
- help="The path of original image.")
- parser.add_argument("--geojson_path", type=str, required=True, \
- help="The path of geojson.")
- if __name__ == "__main__":
- args = parser.parse_args()
- convert_data(args.image_path, args.geojson_path)
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