Invention Grant
- Patent Title: Noise canceling circuit, noise canceling method, and solid-state imaging device
- Patent Title (中): 降噪电路,降噪方法和固态成像装置
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Application No.: US12554409Application Date: 2009-09-04
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Publication No.: US08154629B2Publication Date: 2012-04-10
- Inventor: Shiroshi Kanemitsu , Junichi Hosokawa , Kazuhiro Tabuchi , Takaaki Kawakami
- Applicant: Shiroshi Kanemitsu , Junichi Hosokawa , Kazuhiro Tabuchi , Takaaki Kawakami
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-260409 20081007
- Main IPC: H04N9/64
- IPC: H04N9/64 ; H04N5/208 ; G06K9/40

Abstract:
A noise canceling circuit that includes a sharp/flat-part determining unit that determines whether a neighborhood of a target pixel in a digital video signal is a sharp part or a flat part by calculating a sharpness value indicating sharpness and an approximate noise value approximately indicating a noise value included in the target pixel based on pixel values of the target pixel and a predetermined number of pixels inputted immediately before and after the target pixel, and comparing the sharpness value and the approximate noise value, a noise extracting unit that extracts the noise value of the target pixel by performing a noise extraction corresponding to a result of the determination performed by the sharp/flat-part determining unit, and a correcting unit that corrects the pixel value of the target pixel by using the extracted noise value of the target pixel.
Public/Granted literature
- US20100085447A1 NOISE CANCELING CIRCUIT, NOISE CANCELING METHOD, AND SOLID-STATE IMAGING DEVICE Public/Granted day:2010-04-08
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