image.py 文件源码

def polygon_box(polygon):
        """From a shapely polygon, return the information about the polygon bounding box.
        These information are offset (x, y), width and height.

        Parameters
        ----------
        polygon: shapely.geometry.Polygon
            The polygon of which the bounding box should be computed

        Returns
        -------
        offset: tuple (int, int)
            The offset of the polygon bounding box
        width: int
            The bounding box width
        height
            The bounding box heigth
        """
        minx, miny, maxx, maxy = polygon.bounds
        fminx, fminy = int(math.floor(minx)), int(math.floor(miny))
        cmaxx, cmaxy = int(math.ceil(maxx)), int(math.ceil(maxy))
        offset = (fminx, fminy)
        width = cmaxx - fminx
        height = cmaxy - fminy
        return offset, width, height