| Original document(41 pages) 中文版 |
A tone converting device to convert an image density signal having m-valued tone into an image density signal having binary tone, m being a natural number, is provided. The tone converting device includes an input signal accumulating-and-adding unit to accumulate and add sequentially input m-valued image density signals so as to generate a first cumulative sum; an output signal accumulating-and-adding unit to accumulate and add binary image density signals as converted output so as to generate a second cumulative sum; and an output tone setting unit to set a smaller value among two values to an output conversion value when the second cumulative sum is larger than or equal to the first cumulative sum, and to set a larger value among the two values to the output conversion value when the second cumulative sum is smaller than the first cumulative sum. |
Application Number
申请号 |
200610009492 |
Application Date
申请日 |
2006.02.23 |
| Title 名称 |
Halftoning device, image processing apparatus, printing apparatus, halftoning method, and program
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Publication Number
公开号 |
1825895 |
Publication Date
公开日 |
2006.08.30 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
H04N1/52,H04N1/46 |
Applicant(s) Name
申请人 |
Sony Corp. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Ujiie Ichiro, Kuwahara Soichi |
| Attorney & Agent 代理人 |
huang xiaolin wang zhisen |
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