pildriver.py 文件源码

def do_contrast(self):
        """usage: contrast <image:pic1>

        Enhance contrast in the top image.
        """
        from PIL import ImageEnhance
        factor = float(self.do_pop())
        image = self.do_pop()
        enhancer = ImageEnhance.Contrast(image)
        self.push(enhancer.enhance(factor))