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US 5,499,057 AGranted
Apparatus for producing a noise-reducded image signal from an input image signal
AssigneeSony Corporation
InventorsTetsujiro Kondo, Takashi Horishi, Yasuhiro Fujimori, Takeharu Nishikata
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Abstract
Apparatus are provided for producing a noise-reduced image signal from an input image signal having relatively more noise. The input image signal is divided into a number of block signals. A class code is produced for each of the block signals and used to produce low noise image data which is either output as a pixel or block of the noise-reduced image signal or is used to produce the same.
Claims15
An apparatus for producing a noise-reduced image signal from an input image signal having relatively more noise than the noise-reduced image signal, comprising:
- block producing means for producing a plurality of noise-containing block signals from the input image signal, each of the noise-containing block signals representing a portion of an image represented by the input image signal;
- class code producing means for producing a class code for each of the plurality of noise-containing block signals, each class code identifying low noise image data corresponding with an image portion and having a noise level lower than that of a noise-containing block for which the class code was produced;
- and
- noise-reduced image signal producing means for producing the noise-reduced image signal based on the class codes produced by the class code producing means.
1 more element
Dependencies are inferred from the claim text.