Rasterikuvankäsittelyohjelmistot

Rasterikuvankäsittely refers to the manipulation and editing of raster images. Raster images, also known as bitmap images, are composed of a grid of individual pixels, each assigned a specific color value. This contrasts with vector images, which are defined by mathematical equations describing lines, curves, and shapes.

Software applications designed for raster image editing allow users to perform a wide range of operations. Common tasks include cropping, resizing, rotating, and adjusting brightness, contrast, and color balance. Users can also apply filters and effects to alter the appearance of an image, such as sharpening, blurring, or adding artistic styles. More advanced techniques involve pixel-level editing, where individual pixels can be altered or replaced.

Raster image formats like JPEG, PNG, and GIF are widely used for photographs and web graphics. The resolution of a raster image, measured in pixels per inch (PPI) or dots per inch (DPI), determines its level of detail. Higher resolutions generally result in sharper images but also larger file sizes. Conversely, lower resolutions can lead to pixelation and a loss of quality when the image is enlarged.

The process of rasterikuvankäsittely is fundamental in digital photography, graphic design, web development, and many other fields where visual content is crucial. It enables the correction of imperfections, enhancement of aesthetic qualities, and adaptation of images for various purposes and platforms.