from PIL import Image, ImageFilter img = Image.open("red1.jpg") img_gray = img.convert('L') img_sharp = img_gray.filter(ImageFilter.SHARPEN) sharpness = ImageStat.Stat(img_sharp).var[0] print("ruidu:", sharpness)报错NameError: name 'ImageStat' is not defined

这个错误是因为你没有导入ImageStat模块。请修改你的代码，添加导入ImageStat模块的语句：

from PIL import Image, ImageFilter, ImageStat

img = Image.open("red1.jpg")
img_gray = img.convert('L')
img_sharp = img_gray.filter(ImageFilter.SHARPEN)
sharpness = ImageStat.Stat(img_sharp).var[0]
print("锐度:", sharpness)

这样就可以顺利地计算图像的锐度了。