混合多个图像，同时保留原始颜色

Question

我想要的： Done using photoshop (multiply)

blend() with alpha=0.5, also blending with the white image on which I pasted it 我的问题有什么解决方法吗？原图什么都可以，只是给个参考图

Image A with a transparent background (0,255,255,255)

Image B with a transparent bg (255,0,255,255)

Answer 1

还有其他方法可以做到这一点，但这应该是非常通用的并且适用于其他情况：

#!/usr/bin/env python3

from PIL import Image
import numpy as np

# Load both images and make into Numpy arrays
a=np.array(Image.open('A.png').convert('RGBA'))
b=np.array(Image.open('B.png').convert('RGBA'))

# Make masks of all opaque pixels in each image, i.e. alpha>0
mA = a[...,3] > 0
mB = b[...,3] > 0

# Make empty result image
res = np.zeros_like(a)
res[mA] = np.uint8([255,0,255,255])     # make all pixels from A magenta
res[mB] = np.uint8([0,255,255,255])     # make all pixels from B cyan
res[mA & mB] = np.uint8([0,0,255,255])  # make all pixels common to A and B blue

# Save result
Image.fromarray(res).show()

混合多个图像，同时保留原始颜色

Blending multiple images while retaining the original colors

python

python-imaging-library