发明名称 |
Image processing method |
摘要 |
<p>An image data of M-gradations in a pixel is converted into multivalued image data of N-gradations (M > N > 2) in a pixel. A remarked pixel converted into the multivalued data is determined whether to be a predetermined gradation TJ (N > TJ > 2) in which a tone jump occurs. When the remarked pixel converted into the multivalued data is determined to be the predetermined gradation TJ, it is determined whether a pixel of the predetermined gradation TJ exists in pixels being adjacent to the remarked pixel. When the pixel of the predetermined gradation exists, the gradation of the remarked pixel is changed to the gradation other than the predetermined gradation so as to prevent the tone jump, and an average density after multivalued image data conversion is preserved. <IMAGE></p> |
申请公布号 |
EP1259063(A2) |
申请公布日期 |
2002.11.20 |
申请号 |
EP20020006224 |
申请日期 |
2002.03.20 |
申请人 |
TOSHIBA TEC KABUSHIKI KAISHA |
发明人 |
NAGATA, YUKO;WATANABE, HIDEHIRO |
分类号 |
B41J2/52;B41J2/01;G03F3/08;G06T5/00;H04N1/405;(IPC1-7):H04N1/405 |
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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