发明名称 |
Method for applying tonal correction to a binary halftone image |
摘要 |
A method and computer-readable medium for applying tonal correction to a binary halftone image formatted in a bit-mapped manner. The binary halftone image is descreened to obtain an individual tonal value for a plurality of pixels representing the binary halftone image. The individual tonal value is compared to a calibrated tonal value to determine a tonal change for each pixel. Based on the tonal change for each pixel, a probability of change is determined for each pixel in a set of pixels out of the plurality of pixels. The probability of change is used to determine which edge pixels undergo a state change (i.e., on to off) to effectuate a desired tonal adjustment of the binary halftone image. Error diffusion may be applied to further distribute the state changes of the edge.
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申请公布号 |
US6704123(B1) |
申请公布日期 |
2004.03.09 |
申请号 |
US19990466379 |
申请日期 |
1999.12.17 |
申请人 |
CREO INC. |
发明人 |
AV-SHALOM AMIT;BIELAK RICHARD ROMAN |
分类号 |
H04N1/409;(IPC1-7):G06R15/00 |
主分类号 |
H04N1/409 |
代理机构 |
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主权项 |
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地址 |
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