FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Raster images are constructed by a series of pixels, or individual blocks, to form an image. JPEG, GIF, and PNG are all raster image extensions.

Detailed explanation-2: -What is a raster file? Raster files are images built from pixels-tiny color squares that, in great quantity, can form highly detailed images such as photographs. The more pixels an image has, the higher quality it will be, and vice versa.

Detailed explanation-3: -Popular types of raster files include JPEG, PNG, and GIF images. However, because their pixel number is fixed, raster images can become distorted or blurry when resized to fill a bigger or smaller space.

Detailed explanation-4: -[data models] The smallest unit of information in an image or raster map, usually square or rectangular. Pixel is often used synonymously with cell. [remote sensing] In remote sensing, the fundamental unit of data collection. A pixel is represented in a remotely sensed image as a cell in an array of data values.

Detailed explanation-5: -JPEGs. JPEGS (Joint Photographic Experts Group) are one of the best known raster image formats and what’s known as a ‘lossy’, which means that when you save the image, it partially discards some image data to compress the image.