indexed.py 文件源码

def to_image(self):
        from c3nav.mapdata.models import Source
        (minx, miny), (maxx, maxy) = Source.max_bounds()

        height, width = self.data.shape
        image_data = np.zeros((int(math.ceil((maxy-miny)/self.resolution)),
                               int(math.ceil((maxx-minx)/self.resolution))), dtype=np.uint8)

        if self.data.size:
            minval = min(self.data.min(), 0)
            maxval = max(self.data.max(), minval+0.01)
            visible_data = ((self.data.astype(float)-minval)*255/(maxval-minval)).clip(0, 255).astype(np.uint8)
            image_data[self.y:self.y+height, self.x:self.x+width] = visible_data

        from PIL import Image
        return Image.fromarray(np.flip(image_data, axis=0), 'L')