| 发明名称 |
IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PRINTING MEDIUM AND STORAGE MEDIUM |
| 摘要 |
An image processing apparatus that generates a halftone image by quantizing an input image includes: a holding unit configured to hold a threshold value matrix in which different threshold values are arranged; a pixel position determination unit configured to determine a candidate of a pixel position whose threshold value is to be rewritten based on each pixel value of a plurality of pixels included in a predetermined area for the predetermined area in the input image; and a threshold value determination unit configured to determine a threshold value of the pixel position determined to be the candidate by using at least one threshold value of a plurality of threshold values corresponding to the predetermined area. |
| 申请公布号 |
US2016004942(A1) |
申请公布日期 |
2016.01.07 |
| 申请号 |
US201514750128 |
申请日期 |
2015.06.25 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Sumi Naoki;Yamada Akitoshi;Miyazaki Shinichi;Kato Masao;Ishikawa Hisashi;Fujimoto Akihiro;Yamamoto Yusuke;Hara Yuji |
| 分类号 |
G06K15/02 |
主分类号 |
G06K15/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An image processing apparatus that generates a halftone image of an input image by performing quantization, comprising:
a holding unit configured to hold a threshold value matrix in which different threshold values are arranged; a pixel position determination unit configured to determine a candidate of a pixel position whose threshold value is to be rewritten based on each pixel value of a plurality of pixels included in a predetermined area for the predetermined area in the input image; and a threshold value determination unit configured to determine a threshold value of the pixel position determined to be the candidate by using at least one threshold value of a plurality of threshold values corresponding to the predetermined area. |
| 地址 |
Tokyo JP |
