Digital filter for enhancement of document images
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United States of America Patent
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Sep 23, 1986
Grant Date -
N/A
app pub date -
Jun 14, 1984
filing date -
Jun 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for scanning a document image in an m.times.n matrix. The device includes a sensing array for sequentially sensing along a scan line, elements along one dimension of the matrix, registers for sequentially storing sensed elements for a selected number of scan lines, and a circuit for effecting a scan line delay between sequential scan lines. Registers are also provided for effecting an element delay in all of the stored scanned lines along the other dimension of the matrix wherein the element delay is responsive to a sequential sensing of a matrix element. Selected matrix elements are combined with selected weighting factors for enhancing the document image being scanned.
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