The best way to prevent this problem is by using Lithium batteries. A good tip is to always carry a spare set of lithium batteries in case of a dead battery emergency. In technical terms, interpolation is the increase of image resolution by the addition of new pixels throughout the image, the colours of which are based on neighboring pixels. In simpler terms, interpolation occurs when a scanned image is enlarged and more pixels are added. These days, advanced software calculates the interpolation during the scanning process to better control the placement of pixels throughout the image.
Pixels stand for picture element, and are the tiny dots that make up a digital image.
What you plan on doing with your images dictates how many megapixels you'll want your camera to have. The more pixels in an image, the higher its resolution. Posting an image on the Internet does not have nearly the same pixel requirements as a photograph used in a magazine. Purchasing a camera with multiple settings is a good idea, as it allows you to match the camera's settings with your needs. It is important to remember that the more pixels in an image, the higher the resolution, and the higher the resolution, the more space required on your computer or camera's memory card to store the file.