Check out how different this photo looks after I colorized it using Paint Shop Pro. Since the original was black and white, I was just guessing on the colors. This is an extremely time consumig process, where you are actually editing each pixel individually. I created a new layer for each color, and then adjusted the opacity of each layer so the colors blended well together.
This photo was taken in 1913 in China. That's my grandfather on the right with his four sisters. The photo was taken in a photography studio, and that's a cardboard car, and the background was a mural.