发明名称 |
INTER-SEPARATION COLOR IMAGE PROCESSING USING ERROR DIFFUSION |
摘要 |
A method for processing an input image including a plurality of input pixels each having a first number of possible input levels of optical densit y toform an output image including a plurality of separa tions each including a plurality of output pixels each having a second number of possible output levels of optical density. The method includes the steps of generating a fir st threshold reference signal as a function of the output levels of optical den sityof a plurality of corresponding pixels each being se lected from one of the plurality of separations, modifying a current one of the plurality of input pixels in a current one of the plurality of separations in accordance with an error signal derived by processing previous ones of pixels in the current one of t he plurality of separations, generating a second threshold reference signal according to the output levels of optical density of previously processed pixels in the current one of the plurality of separations, and forming one o f the output pixels by comparing the modified current one of the plurality of input pixels to the generated first threshold reference signal and the generated second threshold reference signal.
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申请公布号 |
CA2210244(C) |
申请公布日期 |
2001.10.02 |
申请号 |
CA19972210244 |
申请日期 |
1997.07.11 |
申请人 |
XEROX CORPORATION |
发明人 |
MANTELL, DAVID A.;ESCHBACH, REINER |
分类号 |
B41J2/525;G03G15/01;G06T1/00;G06T5/00;H04N1/405;H04N1/46;H04N1/52;H04N1/60;(IPC1-7):G06T1/00 |
主分类号 |
B41J2/525 |
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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