Invention Grant
- Patent Title: Image chroma noise reduction in the bayer domain
- Patent Title (中): 拜耳域中的图像色度降噪
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Application No.: US13421799Application Date: 2012-03-15
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Publication No.: US09129393B2Publication Date: 2015-09-08
- Inventor: Angelo Bosco , Davide Giacalone , Arcangelo Ranieri Bruna
- Applicant: Angelo Bosco , Davide Giacalone , Arcangelo Ranieri Bruna
- Applicant Address: IT Agrate Brianza
- Assignee: STMircoelectronics S.r.l.
- Current Assignee: STMircoelectronics S.r.l.
- Current Assignee Address: IT Agrate Brianza
- Agency: Seed IP Law Group PLLC
- Priority: ITVI2011A0052 20110315
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06K9/34 ; G06K9/36 ; G06T5/20 ; G06T3/40

Abstract:
An embodiment relates to a method and an image processor for reducing chroma noise in digital-image data. An embodiment performs noise reduction in the color-filter-array domain prior to demosaicing in order to prevent spreading of noise in subsequent stages of the image-processing pipeline. Peaks in the CFA data are attenuated in order to prevent any undesired color cast. Specifically, any correction to a certain pixel is made in accordance with the amplitude of digital gains applied, as well as with the local luminance and the contribution of the current color channel to the local luminance. In this manner, corrections are restricted to image areas that are subject to high digital amplification, that are comparatively dark, and that are not dominated by the current color channel.
Public/Granted literature
- US20120237124A1 IMAGE CHROMA NOISE REDUCTION IN THE BAYER DOMAIN Public/Granted day:2012-09-20
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