The problem with this is that you pay to scan the good, the bad, and the ugly. It's much better to have your images developed normally and then select out the best for scanning later. Scanning Basics Color scanners work by creating separate red, green, and blue versions of the image, and then merging them together to create the final digital image. Some scan all of the colors in one pass while others take three passes, a slower but higher quality method. Which method is used depends on the scanner's image sensor.
Most scanners use linear CCDs arranged in a row.
Others have 3 rows of photosites, each row with its own filter so they can capture all three colors on a single pass. The light source reflects off a print or passes through a transparency and is focused onto the image sensor by a mirror and lens system. Because of this mirror and lens system, the sensor does not have to be as wide as the area being scanned. The horizontal optical resolution of the scanner is determined by the number of photosites on its sensor. However, the vertical resolution is determined by the distance the paper or light source advances between scans.