Invention Grant
- Patent Title: Image processing apparatus, image projection apparatus, and image processing method
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Application No.: US15654816Application Date: 2017-07-20
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Publication No.: US10129511B2Publication Date: 2018-11-13
- Inventor: Masaki Nose
- Applicant: Masaki Nose
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: JP2016-151602 20160801; JP2017-108697 20170531
- Main IPC: H04N1/04
- IPC: H04N1/04 ; H04N9/31 ; H04N5/232 ; G06T5/00 ; G06T5/40 ; H04N1/60 ; H04N9/69 ; H04N5/225 ; H04N5/235

Abstract:
An image processing apparatus includes an input image color space conversion unit that converts an input image signal of each frame of a moving image signal into a luminance image signal and a color difference image signal, a luminance image correction unit that adjusts a histogram equalization correction intensity of a histogram equalization process for each frame and applies the histogram equalization process to the luminance image signal of each frame to generate a luminance-corrected image signal, a color difference image correction unit that applies a saturation enhancement process to the color difference image signal of each frame, in parallel with the histogram equalization process, to generate a color-difference-corrected image signal, and an output image color space conversion unit that converts the luminance-corrected image signal and the color-difference-corrected image signal into an output image signal in the same format as the input image signal.
Public/Granted literature
- US20180035088A1 IMAGE PROCESSING APPARATUS, IMAGE PROJECTION APPARATUS, AND IMAGE PROCESSING METHOD Public/Granted day:2018-02-01
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