python - PIL 重复填充背景图片

Question

我有一个像这样的小背景图片:

它比我的图像尺寸小，所以我需要反复绘制它。 (想想 css 中的背景重复)

我搜索了很多，但找不到解决方案....非常感谢。

Answer 1

根据 Marcin 链接到的代码，这将在较大的图像上平铺背景图像:

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: