Photographer Mario Unger decided one day when looking at an old, damaged picture that he could try to repair it with Photoshop. While the program has some repairing algorithms in it, such as noise reduction or despeckling, those wouldn't do what he wanted to do for the shots he had in mind, which might be missing large patches of the image or faded by age.
Some of his results can be seen
here at
My Modern Met, and they're really fascinating. In some of the images, he's also added color in order to bring them even more life. I'm a sucker for stuff like that. We always have the idea in the back of our minds that the world shown by early photography lacked color, because all of the pictures were in black and white. Skilled and proper colorizing can show that world was as bright and varied as ours, and open a window to the past that's useful to contemplate.