Removing surface damage, including cracks and creases is an everyday occurrence in photo restoration. This is the most common damage to old photos. The damage is most often because of people folding the photographs. This cracks the photographic emulsion surface and reveals the paper underside of the photo.
To repair this kind of damage we must use the magic of Photoshop. A few different tools are used for this kind of restoration. but to restore the cracked areas and surface damage I use the 'healing brush' and the 'spot healing brush'. With the healing brush you can select which area you want to copy the pixels from and then select where to paste them. As you paste the copied pixels, Photoshop analysis the surrounding pixels and adjusts the colour of pasted pixels to closely match those of the surrounding area. The Spot Healing Brush automatically selects the best area to copy from and matches to the surround pixels. This is a much quicker one step process as apposed to the Healing Brush 2 steps. But it can be less useful in very detailed areas.