(under subclass 232) Subject matter in which a broad range of input image values are mapped to a limited number of output image values.
(1) Note. The quantization of an image possesses two components: space and amplitude. Spatial quantization, or sampling, divides the original image into grid cells (pels or pixel*s). Amplitude or gray-level quantization then assigns to each grid cell an integer value corresponding to the brightness level within the cell.
(2) Note. This subclass does not include amplitude or gray-level quantization in which a variable threshold, gain or slice level allows the quantization to adapt to varying input image values.
SEE OR SEARCH THIS CLASS, SUBCLASS:
270, through 273, for adaptive quantization based on a variable threshold, gain or slice level.
SEE OR SEARCH CLASS
348, Television,
405, for adaptive quantization of television signals, where the television is an integral part of the system.
