Scanning a photograph at a resolution that is too low will result in pixelization in the image. The best way to resolve this is to rescan the image at the correct resolution. You can also adjust the focus of the image. Photo Express simulates the effect of adjusting the focus of your image with a Sharpening tool. Simply select a balanced adjustment from one of the presets or use the Advanced mode to fine-tune the adjustments.
Resolution is the amount of information an image contains.
It is also the number of pixels per inch or centimeter in an image. Pixels appear as tiny dots, which, when placed closely together create the illusion of continuous colors and shades to give shape to your image. Although it is usually not an issue for screen images, it can be important for printing. Scaling refers to the physical size of your image, in inches or pixels, not to its resolution size. DPI is the number of dots of ink per inch for an image printed on paper.