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Browse by Category: Main > Optical & Optics
Class Information
Number: 382/246
Name: Image analysis > Image compression or coding > Lossless compression > Huffman or variable-length coding
Description: Subject matter in which image data are encoded using a variable length code, such that the most common image data have the shortest codes.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13

Patent Number Title Of Patent Date Issued
5022088 Image processing apparatus with provision for memory operation Jun. 4, 1991
4982293 Method of compressing halftone image data Jan. 1, 1991
4955066 Compressing and decompressing text files Sep. 4, 1990
4955061 Method and apparatus for processing an image signal Sep. 4, 1990
4947447 Method for data coding Aug. 7, 1990
4941194 Method of compressing radiation image signal Jul. 10, 1990
4939583 Entropy-coding system Jul. 3, 1990
4853696 Code converter for data compression/decompression Aug. 1, 1989
4843632 Compressed image expansion system Jun. 27, 1989
4839738 Apparatus for decoding facsimile coded data to image data with coding and reference line windowing and color change detection Jun. 13, 1989
4809350 Data compression system Feb. 28, 1989
4809081 Method and apparatus for decompressing encoded data Feb. 28, 1989
4800440 Digital image signal coding/decoding circuit with buffer memory storing reference line as compression codes Jan. 24, 1989
4797944 Image signal encoding method by orthogonal transformation Jan. 10, 1989
4791680 Image data converter Dec. 13, 1988
4766499 Method and apparatus for encoding and decoding dither signals for reproduction of the halftone of a picture Aug. 23, 1988
4742554 Image data processor May. 3, 1988
4654877 Data compression system Mar. 31, 1987
4606068 Video compressor for video format unit Aug. 12, 1986
4571633 High-speed facsimile machine capable of parallel processing Feb. 18, 1986
4563671 Coding technique Jan. 7, 1986
4553171 Tile encoding in image printing Nov. 12, 1985
4542411 Redundancy reduction coding method of multi-tone picture signal and apparatus therefor Sep. 17, 1985
4447829 Facsimile transmission arrangement May. 8, 1984
4445195 Recording system of variable length picture information Apr. 24, 1984
4441208 Picture information processing and storing device Apr. 3, 1984
4396906 Method and apparatus for digital Huffman encoding Aug. 2, 1983
4355306 Dynamic stack data compression and decompression system Oct. 19, 1982
4312018 Demodulator in a facsimile system Jan. 19, 1982
4228467 Reduced redundancy facsimile transmission installation Oct. 14, 1980
4185302 Run length encoding of facsimile signals Jan. 22, 1980
4161757 Facsimile system Jul. 17, 1979
4135214 Method and apparatus for compressing facsimile transmission data Jan. 16, 1979
4121259 Method for digital run-length coding with redundance reduction for transmission of binarily coded picture informations Oct. 17, 1978
4107648 Scan encoding of two dimensional pictorial entities Aug. 15, 1978
4103287 Variable length codes for high quality image encoding Jul. 25, 1978

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