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US Patent 5029107 - Apparatus and accompanying method for converting a bit mapped monochromatic image to a grey scale image using table look up operations
US Patent Issued on July 2, 1991
Estimated Patent Expiration Date:
March 31, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
March 31, 2009Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractApparatus and an accompanying method for converting a relatively high resolution halftone bit-mapped monochromatic document, such as illustratively a halftone separation which exists in a CDPF print file, into a relatively low resolution continuous tone grey scale document which, when the latter is applied to a display screen of a video monitor having appropriate grey scale capability, would provide a readable displayed page, i.e. a "preview", that approximately depicts how the bit-mapped document would appear when printed.Other References
| InventorAssigneeApplicationNo. 331485 filed on 03/31/1989US Classes:345/698, Adjusting display pixel size or pixels per given area (i.e., resolution)345/589Color or intensityExaminersPrimary: Harkcom, Gary V.Assistant: Nguyen, Phu K. Attorney, Agent or FirmUS Patent References4084196, Electronic half-tone generating means for facsimile reproduction systemIssued on: 04/11/1978 Inventor: Tisue, et al.4210936, Method and apparatus for reproducing an original gray scale image Issued on: 07/01/1980 Inventor: Cinque , et al.4486785, Enhancement of video images by selective introduction of gray-scale pels Issued on: 12/04/1984 Inventor: Lasher , et al.4533942, Method and apparatus for reproducing an image which has a coarser resolution than utilized in scanning of the image Issued on: 08/06/1985 Inventor: Gall , et al.4630125, Unscreening of stored digital halftone images Issued on: 12/16/1986 Inventor: Roetling4672559, Method for operating a microscopical mapping system Issued on: 06/09/1987 Inventor: Jansson , et al.4855933Line figure connecting apparatus Issued on: 08/08/1989 Inventor: Kondo International ClassG06K 015/00 |
