Quality lenses, for prime example, are a feature that is more important than pixels. A poorly constructed lens has all the power of the camera, because the fuzzy image is still blurry, even with ten megapixel. When they have a camera, megapixel is a pretty good guide on how much printing you can get them out. Because the actual pixels are "dots," if you zoom in enough, the illusion was destroyed - and the individual dots will be obvious. The more pixels, the more you can expand the image before the dot becomes visible.
As a general rule, four-megapixel camera is perfect for 5x7 prints, but generally not larger. There are exceptions, but they depend largely on the subject of the picture, and not a megapixel camera. While a three megapixel images will look good on the computer screen, printed on a 3x5, or may even be printed at 5x7, the dots really clear if the image was blown up on highway billboards. Five megapixel will make a good 8x10 print.
When it comes to image zoom, image editing program is not a good track record. Kimi did a great picture, but the increase is much more difficult - because not only can make the dots bigger. This program is to add the words or the new term - that is, he had to guess what the new pixel color. There is a program designed specifically for enlarging digital images, but still a relatively new technique.
