Digital raster images consist of a set of a grid of dots called pixels. Each pixel provides a definite color. Examples of raster images include file formats such as TIFF, JPEG, PNG, GIF, RAW, and PSD. These file formats are used in storing photos, digital artwork as well as web graphics.
Raw Images file formats contain image data that is raw and uncompressed. Unlike compressed formats which lose data during the compression process, RAW formats produce images directly as they were captured by the capturing device sensor. Raw file formats are primarily processed and then converted to JPEG or TIFF in special RAW file converters. Raw format is viewed as the highest quality image format.