发明名称 |
METHOD FOR ENHANCING COMPRESSIBILITY AND VISUAL QUALITY OF SCANNED DOCUMENT IMAGES |
摘要 |
<p>A system and method of image processing for smoothing, denoising, despeckling and sharpening scanned document images which is performed prior to a compression. The scanned image is selectively smoothed by anisotropic diffusion filtering in a single iteration with a 3x3 kernel, which provides denoising, edge-preserving smoothing. The smoothed image data is then selectively sharpened using variable contrast mapping that provides overshoot-free variable-sharpening and despeckling. Image quality is improvides while increasing compressibility of the image.</p> |
申请公布号 |
EP1320987(B1) |
申请公布日期 |
2005.06.29 |
申请号 |
EP20010978692 |
申请日期 |
2001.10.01 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
MAURER, RON, P.;BARASH, DANNY |
分类号 |
G06K9/40;H04N1/409;(IPC1-7):H04N1/409 |
主分类号 |
G06K9/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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