A bad point self-adapted grid noise elimination device and method
A noise removal and adaptive technology, applied in the field of image processing, can solve problems such as large resources
Inactive Publication Date: 2009-11-25
VIMICRO CORP
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In this way, the two modules need at least 8 lines of memory to store the data to be processed, which requires a lot of resources
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[0034] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.
[0035] In the technical solution proposed by the present invention, dead point compensation and grid noise elimination are performed in parallel at the same time, and they can share memory, which can greatly save hardware resources.
[0036] Please refer to Figure 5 As shown, it shows a structural block diagram of an embodiment of the dead point adaptive grid noise elimination device 1 of the present invention. The dead point adaptive grid noise elimination device 1 is used to perform dead point compensation and grid noise elimination on Bell images with dead pixels and unbalanced G value defects. The device 1 includes a data cache module 10, an identification A control module 20 , a dead point compensation module 30 and a noise elimination module 40 .
[0037] The data cache module 10 is used to buffer the input Bell pattern image data, because th...
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The invention discloses a noise eliminator of grid with adaptive dead pixels, comprising a data buffering module, an idneitification control module, a dead pixel compensation module and a noise elimination module. The data buffering module is used for buffering 2xN+1 rows of bel image data, wherein N is more than 2. The idneitification control module is used for judging color types of present pixels and is whether or not a dead pixel, and controlling the dead pixel compensation module and the noise elimination module according to judgement results. The dead pixel compensation module is used for compensating dead pixels of present pixel value according to surrounding homochromatic pixel value when present pixel is a dead pixel, if present pixel is a G color pixel, transmitting present pixel value which is compensated to the noise elimination module, if not, outputting present pixel value which is compensated directly. The noise elimination module is used for receiving compensating value of present pixel sent from the dead pixel compensation module when present pixel is a G color and dead pixel, eliminating noise to compensating value of present pixel according to surrounding G color pixel value, also eliminating noise to present pixel value according to surrounding G color pixel value when present pixel is a G color pixel but not a dead pixel, then outputting the value of which noise is eliminated.
Description
technical field [0001] The invention relates to the field of image processing, in particular to a dead point self-adaptive grid noise elimination device and method. technical background [0002] The optical sensors of digital image capture devices such as cameras, digital cameras, and digital video cameras usually use CCD (Charge-coupled device) or CMOS (Complementary Metal Oxide Semiconductor) technology, which is densely packed in both horizontal and vertical directions. A two-dimensional matrix composed of arranged photosensitive elements (CCD or CMOS), while CCD or CMOS sensors can only sense light brightness, not color information. Therefore, a color filter array (ColorFiltered Array, CFA) must be used to ensure that each sensor pixel receives only one color of light: usually one of the three colors red (R), green (G), and blue (B) . The color filter array can use different modes, the most commonly used is the color filter array of Bayer (Bell) mode. The Bayer patter...
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IPC IPC(8): H04N5/217H04N9/04H04N5/367
Inventor 沈操王浩
Owner VIMICRO CORP