sketch.py 文件源码

def get_fitness(self, other_image):
        if not self.cached_fitness:
            im = self.get_image()
            new_im = ImageChops.difference(im, other_image)
            st = ImageStat.Stat(new_im)
            # Add in a penalty for number of triangles used
            additional_triangle_weight = len(self.triangles) * TRIANGLE_WEIGHT
            self.cached_fitness = sum(st.sum[:3]) + additional_triangle_weight
        return self.cached_fitness

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