| Term | Definition |
|---|---|
| Raster |
A raster image is a bitmap-based graphic comprising an array of pixels, each with a particular value. In a monochrome bitmap pixel values are either 0 (white) or 1 (black). Because each bitmap has a known number of pixels it also has a fixed resolution. Scaling a bitmap on a display and even the quality of the display system can compromise the quality of the displayed image. Common bitmap image formats include BMP, GIF, TIF, JPG, PNG. Special software is available to convert raster images into vector files, also known as vectorization. |