发明名称 |
Image processing method and device and image formation device |
摘要 |
In a multilevel error diffusion process, an input image signal Din with (256) tones and an image correction signal Ecd are added together to produce a corrected image signal Dinc, which in turn is converted into an eight-level image signal to provide an output image signal Dout with eight tones. To convert the input image signal into the output image signal, there are provided a plurality of conversion tables (51 to 55) and a switching means (56) for selectively switching the conversion tables at random. The conversion tables (51 to 55) are switched with each pixel in the corrected image signal. <IMAGE> |
申请公布号 |
EP0959429(A3) |
申请公布日期 |
2002.11.27 |
申请号 |
EP19990109735 |
申请日期 |
1999.05.18 |
申请人 |
TOSHIBA TEC KABUSHIKI KAISHA |
发明人 |
NAKAHARA, NOBUHIKO;UMEZAWA, HIROKI |
分类号 |
H04N1/405;B41J2/52;G06T5/00;H04N1/40 |
主分类号 |
H04N1/405 |
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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