Invention Grant
- Patent Title: Adjustment of image luminance values using combined histogram
- Patent Title (中): 使用组合直方图调整图像亮度值
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Application No.: US11696062Application Date: 2007-04-03
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Publication No.: US08417032B2Publication Date: 2013-04-09
- Inventor: Ryosuke Mizuno , Yukihiko Sakashita
- Applicant: Ryosuke Mizuno , Yukihiko Sakashita
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Carter, DeLuca, Farrell & Schmidt LLP
- Priority: JP2006-117187 20060420
- Main IPC: G06K9/00
- IPC: G06K9/00
Abstract:
A first conversion characteristic is calculated from image information of a first image region including target pixel of an input image, a second conversion characteristic is calculated from image information of a second image region including the first image region, and a third conversion characteristic is calculated using the first and second conversion characteristics and a weighted coefficient. Then, a luminance value of the target pixel is converted and outputted based on the third conversion characteristic.
Public/Granted literature
- US20070286480A1 IMAGE PROCESSING APPARATUS AND METHOD Public/Granted day:2007-12-13
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