透明像素在 PIL 中被粘贴为黑色 [英] Transparet pixels are being pasted as black in PIL

问题描述

我粘贴了一个带有透明像素的图像，但在最终图像中它们是黑色的

I paste an image with transparent pixels, but they are black in the final image

img = Image.new('RGBA', (100, 100), "white")

arbol16 = Image.open("arbol16.png")

img.paste(arbol16,( 0, 0, 16, 16))

img.show()

arbol16.png 图像文件:

推荐答案

我认为您(可以理解)对 img.show() 显示的内容感到困惑——我认为这是错误的(实际上可能是一个错误).在我的 Windows 系统上，显示了一个临时的 .BMP 图像，看起来透明像素是黑色的.

I think you're (understandably) being confused by what the img.show() is displaying — which I believe is wrong (and may in fact be a bug). On my Windows system a temporary .BMP image is displayed, and it looks like the transparent pixels are black.

但是，如果您在末尾添加类似 img.save('arbol16_mod.png') 的行，然后通过在某些图像中手动打开来查看那个图像文件文件查看程序，如画图、Windows 照片查看器或 Photoshop，结果是正确的.

However if you add a line like img.save('arbol16_mod.png') at the end and then view that image file by manually opening it in some image file viewing program, such as Paint, Windows Photo Viewer, or Photoshop, the result is correct.

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