发明名称 |
IMAGE PROCESSING APPARATUS, IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, AND RECORDING MEDIUM |
摘要 |
An image processing apparatus includes an image information acquisition unit acquiring average brightness of image data and cumulative frequency distribution of pixels related to gradation of the image data; a conversion range determination unit acquiring a conversion threshold value from the average brightness based on a previously set relationship and determining a gradation conversion range where the gradation of the image data is to be converted based on a gradation where a cumulative frequency corresponds to the conversion threshold value in the cumulative frequency distribution; and a gradation conversion unit converting the gradation of the image data in the gradation conversion range. |
申请公布号 |
WO2015056481(A1) |
申请公布日期 |
2015.04.23 |
申请号 |
WO2014JP71139 |
申请日期 |
2014.08.05 |
申请人 |
RICOH COMPANY, LTD.;KAKINUMA, AKIHIRO |
发明人 |
KAKINUMA, AKIHIRO |
分类号 |
G06T5/00;H04N1/407 |
主分类号 |
G06T5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|