PIL 重复填充背景图片 [英] PIL fill background image repeatedly

问题描述

我有一个像这样的小背景图片:

I have a small background image like this:

它比我的图像尺寸小，所以我需要重复绘制它.(想想css中的背景重复)

it's a smaller than my image size, so I need to draw it repeatedly. (think about background-repeat in css)

我搜索了很多，但找不到解决方案......非常感谢.

I searched a lot and can't find a solution to this....thanks a lot.

推荐答案

根据 Marcin 链接的代码，这将在更大的背景图像上平铺:

Based on the code linked to by Marcin, this will tile a background image on a larger one:

from PIL import Image

# Opens an image
bg = Image.open("NOAHB.png")

# The width and height of the background tile
bg_w, bg_h = bg.size

# Creates a new empty image, RGB mode, and size 1000 by 1000
new_im = Image.new('RGB', (1000,1000))

# The width and height of the new image
w, h = new_im.size

# Iterate through a grid, to place the background tile
for i in xrange(0, w, bg_w):
    for j in xrange(0, h, bg_h):
        # Change brightness of the images, just to emphasise they are unique copies
        bg = Image.eval(bg, lambda x: x+(i+j)/1000)

        #paste the image at location i, j:
        new_im.paste(bg, (i, j))

new_im.show()

产生这个:

或者删除 Image.eval() 行:

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