This question is a consequence of :
- How to make a film in black and white and add color to some objects?
- How to show a character in black and white mode with colorful background?
This is just for my personal culture. Using gimp + path + transform, I can do it in one 2D image, but I was trying to understand how you guys would make a character in black and white in a colored scene, if the movie is already done.
From the previous answers, I understand that the key word is this case is
But, I don't understand the principle !
Is it some kind of dynamic path with the time ? What software would you use to do it ? Have you got a link to explain that to a guy without video processing culture like me ?
Thanks for reading,