发明名称 |
Resolution enhancement system for digital images |
摘要 |
An image processing system for providing edge enhancement of low resolution binary image files processes the low resolution data in sections or windows using a binary edge enhancement processor unit to determine whether an edge transition or "kink site" occurs within each window. The edge enhancement processor includes a decision matrix that identifies a pixel based on a calculated gradient magnitude and direction. In one operating mode, the original data in the window is replaced with edge enhanced gray-scale data stored in a look-up table if a kink site is identified. In a second operating mode original data is replaced with higher resolution binary data. To improve speed of operation of the processor, a set of criteria used for determining where enhancement pixels are to be generated has logic operators used for processing the criteria operated simultaneously with a bias provided favoring determinations having closer proximity towards a site likely to require image enhancements. In addition a raster line of pixels is separated into segments and each segment operated on in parallel.
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申请公布号 |
US6021256(A) |
申请公布日期 |
2000.02.01 |
申请号 |
US19960706953 |
申请日期 |
1996.09.03 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
NG, YEE SEUNG;VAN LARE, GLENN ROBERT;FISCHER, RICHARD THOMAS |
分类号 |
G06K15/00;(IPC1-7):G06T5/00;H04N1/409 |
主分类号 |
G06K15/00 |
代理机构 |
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