使用Python中的for循环垂直翻转图像 [英] Flipping an image vertically using for loops in Python

问题描述

我正在尝试垂直翻转图像，但是保存的图像最终变为同一张图像.我认为做new_image.set_pixel(height-1)-r ....会将像素发送到转置的垂直部分.关于我做错了什么，您可以给我一些指导吗?

Im trying to flip an image vertically, but the image saved ends up being the same one. I thought doing new_image.set_pixel(height-1)-r.... would have sent the pixel into the transposed vertical part. Can you give me some guidance as to what I have done wrong?

def flip_vert(filename):

img = load_image(filename)
height = img.get_height()
width = img.get_width()
new_img = Image(height, width)

for r in range(height):
    for c in range(width):
        temp = img.get_pixel(r, c)
        temp2 = new_img.get_pixel(r, c)
        new_img.set_pixel((height-1)-r,(width-1)-c,temp)

new_filename = 'flipv_test' + filename
img.save(new_filename)

推荐答案

在最后一行中，您需要:

In your last line you need:

new_img.save(new_filename)

按现在的样子，您正在保存原始版本的img.

As it is written now you are saving img, which is the original version.

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