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Quantization (image processing) : ウィキペディア英語版 | Quantization (image processing)
Quantization, involved in image processing, is a lossy compression technique achieved by compressing a range of values to a single quantum value. When the number of discrete symbols in a given stream is reduced, the stream becomes more compressible. For example, reducing the number of colors required to represent a digital image makes it possible to reduce its file size. Specific applications include DCT data quantization in JPEG and DWT data quantization in JPEG 2000. == Color quantization == (詳細はmedian cut algorithm, and an algorithm based on octrees. It is common to combine color quantization with dithering to create an impression of a larger number of colors and eliminate banding artifacts.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Quantization (image processing)」の詳細全文を読む
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