在Python中水平翻转图像时出错

Question

I need to flip a picture horizontally, without using the reverse function , I thought I had it right but the error I get is

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    Flip("bm.gif","bm.ppm")
  File "C:\Users\....ImageProcessingSKLT.py", line 133, in Flip
    pic1 = graphics.getPixel(x,y)
AttributeError: 'module' object has no attribute 'getPixel'

The code I have is

def Flip(image1, image2):
    img = graphics.Image(graphics.Point(0, 0), image1)
    X = img.getWidth()
    Y = img.getHeight()
    for y in range(Y//2):
        for x in range(X):
            pic1 = graphics.getPixel(x,y)
            pic2 = graphics.setPixel(X-x,y)
            temp = graphics.getColor(pic1)
            graphics.setColor(pic1,getColor(pic2))
            graphics.setColor(pic2,temp)
            image2 = pic2
    return image2

What does the error mean? and how do I fix it?

Answer 1

The interpreter is complaining that it can't find the getPixel function inside the module graphics ; it's img.getPixel , not graphics.getPixel .

Answer 2

        pic1 = graphics.getPixel(x,y)
        pic2 = graphics.setPixel(X-x,y)

Probably should be:

        pic1 = img.getPixel(x,y)
        pic2 = img.setPixel(X-x,y)