Computer graphic artifacts

process of mapping a continuous set to a countable set

450px|thumb|right|Image on left is original. Center image is reduced to 16 colors. Right image also 16 colors, but dithered to reduce banding effect.

noticeable distortion of media caused by the application of lossy data compression

thumb|Example of a photograph in JPEG format (24-bit color or 16.7 million colors) before posterization, contrasting the result of saving to [[GIF format (256 colors). Posterization occurs across the image, but is most obvious in areas of subtle variation in tone.]] thumb|Posterized photo of a hibiscus thumb|Posterized photo

computer graphics term

inaccuracy in computer graphics

right|frame|An example of pixelation. The image looks smooth when zoomed out, but when a small section is viewed more closely, the eye can distinguish individual pixels. thumb|Pixelated image of a face In computer graphics, pixelation (also spelled pixellation in British English) is caused by displaying a bitmap or a section of a bitmap at such a large size that individual pixels, small single-colored square display elements that comprise the bitmap, are visible. Such an image is said to be pixelated (pixellated in the UK).

undesired or unintended alteration in data introduced in a digital process by an involved technique and/or technology

frame|This pixel art was scaled up using [[nearest-neighbor interpolation. Thus, the "jaggies" on the edges of the symbols became more prominent.]] Jaggies are visual artifacts in raster images, most frequently from aliasing, which in turn is often caused by non-linear mixing effects producing high-frequency components, or missing or poor anti-aliasing filtering prior to sampling.

technique for reducing low-resolution image distortion

type of artifact in signal-processing that appears near sharp transitions