Rasterisisältöä

Rasterisisältöä refers to digital content that is composed of pixels. This is in contrast to vector graphics, which are defined by mathematical equations and can be scaled infinitely without loss of quality. Raster images, on the other hand, are made up of a fixed grid of colored squares called pixels. When a raster image is enlarged beyond its original resolution, the individual pixels become visible, leading to a blocky or blurry appearance.

Common examples of rasterisisältöä include photographs, scanned images, and most digital art created in programs like Photoshop or GIMP. The quality and detail of a raster image are determined by its resolution, measured in pixels per inch (PPI) or dots per inch (DPI). Higher resolutions mean more pixels, resulting in sharper and more detailed images, but also larger file sizes.

File formats commonly associated with rasterisisältöä include JPEG, PNG, GIF, and TIFF. Each format has its own characteristics regarding compression, color depth, and transparency support, making them suitable for different purposes. For instance, JPEGs are good for photographs due to their efficient compression, while PNGs are often preferred for web graphics that require transparency. Editing rasterisisältöä typically involves manipulating individual pixels or groups of pixels, which can be done using image editing software.