python - get ValueError : bad transparency mask when trying to paste, 图像和掩码相同

Question

import numpy as np

from PIL import Image



img_orig = Image.open("me.jpg")

# convert pic to 3-D array
array_orig = np.array(img_orig)

# create R image
array_r = np.copy(array_orig)
array_r[:, :, 1:3] = 0
img_r = Image.fromarray(array_r)

# create GB image
array_gb = np.copy(array_orig)
array_gb[:, :, 0] = 0
img_gb = Image.fromarray(array_gb)

canvas_r = Image.new("RGB", img_orig.size, color=(0,0,0))
canvas_r.paste(img_r, (5, 5), img_r) #error line

canvas_gb = Image.new("RGB", img_orig.size, color=(0,0,0))
canvas_gb.paste(img_gb, (0, 0), img_gb)

result_array = np.array(canvas_r) + np.array(canvas_gb)
result = Image.fromarray(result_array)
result.show()

代码行给出错误在代码中给出。我不太明白为什么 PIL 会为相同的图像提供透明度错误。我相信没有必要指定模式，因为掩码和图像是相同的。

Answer 1

我解决了一个类似的问题:
替换 img_orig = Image.open("me.jpg")与 img_orig = Image.open("me.jpg").convert('RGBA')并替换 canvas_gb = Image.new("RGB", img_orig.size, color=(0,0,0))与 canvas_gb = Image.new("RGBA", img_orig.size, color=(0,0,0))