发明名称 |
Image processing apparatus carrying out multi-value error diffusion process |
摘要 |
An image processing apparatus that can carry out an error diffusion process without degrading the quality of image data generates a density histogram according to pixels included in the input image data. Reference densities S1 and S2 are calculated from pixels having a certain density in a set range. Threshold values T1-T3 are calculated according to the obtained reference densities S1 and S2.
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申请公布号 |
US6501566(B1) |
申请公布日期 |
2002.12.31 |
申请号 |
US19980050905 |
申请日期 |
1998.03.31 |
申请人 |
MINOLTA CO., LTD. |
发明人 |
ISHIGURO KAZUHIRO;TADA KAORU;HIROTA SOH |
分类号 |
B41J2/52;G06T5/00;H04N1/40;H04N1/405;H04N1/41;(IPC1-7):H04N1/40;G06K15/02;H04N1/409 |
主分类号 |
B41J2/52 |
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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