发明名称 |
THRESHOLD MATRIX GENERATION DEVICE AND METHOD FOR GENERATING THRESHOLD MATRIX FOR GENERATING THRESHOLD MATRIX OF PREDETERMINED SIZE USED FOR HALFTONE PROCESSING OF MULTITONE IMAGE DATA USING DITHERING METHOD |
摘要 |
A threshold generation device sets a ratio of a length along a main scanning direction to a length along a sub-direction based on a relation between image reproducibility in the main scanning direction and image reproducibility in the sub-direction of an image processing device for forming an image on a paper based on an image data obtained by the halftone processing. The device determines spatial frequency characteristics having a domain of an ellipse shape having set major axis and minor axis as peak values. The device sets a threshold value of each pixel of the threshold matrix in accordance with the determined spatial frequency characteristics.
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申请公布号 |
US2013010339(A1) |
申请公布日期 |
2013.01.10 |
申请号 |
US201213535514 |
申请日期 |
2012.06.28 |
申请人 |
KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.;YOSHIZAWA MASANORI |
发明人 |
YOSHIZAWA MASANORI |
分类号 |
H04N1/46 |
主分类号 |
H04N1/46 |
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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