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Method for compensating bad dots on digital images

A digital image and dead pixel technology, applied in image communication, color TV parts, TV system parts, etc., can solve the problems of insignificant improvement of image quality, large amount of calculation, complex processing, etc., and achieve reduction of calculation volume, enhancements, effects that improve image quality

Active Publication Date: 2005-08-17
VIMICRO ELECTRONICS CORP
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Problems solved by technology

[0004] The existing bad pixel processing method usually converts the RGB Bayer data into RGB values ​​for each pixel, and then eliminates the bad pixel of the image. This method not only has a large amount of calculation and complicated processing, but also after processing, Image quality improvement is not noticeable

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  • Method for compensating bad dots on digital images
  • Method for compensating bad dots on digital images
  • Method for compensating bad dots on digital images

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Embodiment Construction

[0028] The core idea of ​​the present invention is to use human eyes to be more sensitive to luminance, and combine the feature that luminance and chrominance are separately represented by YUV format data, to perform dead point compensation for YUV data. Furthermore, the U and V components can also be processed at intervals, thus greatly reducing the amount of calculation and improving the image quality.

[0029] As shown in Figure 3, the steps of performing dead point compensation on YUV format data include:

[0030] Step 1, obtaining the YUV component of the current pixel and the YUV components of at least four pixels in its adjacent area;

[0031] Step 2, using the difference between the YUV value of the current pixel and the pixels in the adjacent area to determine whether the current pixel is a bad pixel, if so, then enter step 3 to compensate for the bad pixel, otherwise end the processing of the current pixel;

[0032] Step 3: Use the YUV value of the pixels in the adj...

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Abstract

This invention discloses digit image ruined points compensation method aiming to YUV data compensation, which comprises the following steps: getting current picture element YUV heft and the nearby at least four elements YUV heft; judging whether the current points are bad points according to the difference between current picture elements and nearby picture elements; if there are, then compensating the current element with nearby picture elements.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method for compensating dead pixels of digital images. technical background [0002] At present, digital imaging products such as computer cameras, mobile phone cameras, digital cameras, and camcorders use image sensors mostly of RGB Bayer type, and their original output data formats are shown in Figure 1: Odd numbers behave GRGR..., even numbers behave BGBG..., This is how the image sensor array is arranged on the lens. It can be seen that each 2*2 pixel block contains two G components and one R and B components. RGB format data means that each pixel contains RGB components, and the RGB value of each pixel is calculated by interpolation based on the original output RGB Bayer data of each pixel around the pixel. [0003] Due to the limitations of current technology for manufacturing image sensors, various digital imaging products may have dead pixels. The so-called de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/217
Inventor 史大北
Owner VIMICRO ELECTRONICS CORP
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