Rasterisessa

Rasterisessa is a term primarily used in the context of digital image processing and computer graphics. It refers to a method of representing and storing images as a grid of individual pixels. Each pixel has a specific color value, and the arrangement of these pixels forms the complete image. This is in contrast to vector graphics, which use mathematical equations to define shapes and lines.

The term "raster" itself originates from the process of scanning an image, where an electron beam traces lines across a screen, creating a raster pattern. In digital images, this grid of pixels is the fundamental building block. The resolution of a raster image is determined by the number of pixels it contains, often expressed as width and height (e.g., 1920x1080 pixels). Higher resolution means more pixels and generally a more detailed image.

Common file formats that store raster images include JPEG, PNG, GIF, and BMP. These formats store the color information for each pixel, making them suitable for photographs and complex color gradients. However, raster images can lose quality when scaled up, as the individual pixels become larger and more visible, leading to a blocky or pixelated appearance. Editing raster images typically involves manipulating individual pixels or groups of pixels.