Edge decomposition for the transmission of high resolution facsimile images
January 22, 2008. Estimated 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.Patent ReferencesProgressive image transmission Progressive image transmission Coarse scan/fine print algorithm Method of restoring a picture cell by estimation with high density Method of restoring a picture cell by estimation with high density Picture data compressing method Picture transfer method and apparatus therefor Progressive transmission of two-tone facsimile Method for reducing a binary image Method of and apparatus for generating high-resolution binary image data with respect to linear edges Patent #: 4751585 InventorAssigneeApplicationNo. 146917 filed on 01/22/1988US Classes:382/240, Pyramid, hierarchy, or tree structure348/390.1, Data rate reduction358/447, Signal enhancing382/299Raising or lowering the image resolution (e.g., subpixel accuracy)ExaminersPrimary: Coles, Sr., Edward L.Assistant: Svihla, Randall S. Attorney, Agent or FirmForeign Patent References
International ClassesH04N 001/415H04N 001/40 AbstractA high resolution image is decomposed into a low resolution replica and into corresponding supplemental information for facsimile transmission to a remote location. The low resolution replica is generated by replacing a super pixel (picture element) including a plurality of high resolution image pixels with a single low resolution pixel and corresponding supplemental information, if any is required. The pixels of the low resolution replica are chosen such that all supplemental information required to convert the low resolution replica back to the original high resolution image is located at the "edges " of the low resolution replica. Thus, if a low resolution pixel is at an edge in the low resolution pixel is at an edge in the low resolution replica, supplemental information is generated in accordance with prescribed criteria. In a remote receiver, the decomposition is reversed and the original high resolution image is recomposed by substituting the transmitted supplemental information, if any, for the corresponding low resolution pixels located at the edges of the low resolution replica.Other References
| |
