A tool helps you add color with a black and white shading picture.
To run the tool, you need two pictures: a color filling picture and a black and white shading picture.
A color picture
A black and white shading picture
Those two pictures must be same size of pixels, not over 1000 times 1000 pixels. The black and white shading picture must be RGB three-channel picture. You should rename the color filling picture as 1.jpg and the black and white shading picture as 2.jpg, drag the pictures in the python folder and run the code. You can get a colored shading picture "3.jpg"
The result