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Method and system for correcting color-image bad point

A dead point and image technology, applied in the field of color image dead point correction method and system, can solve the problems that the photosensitive diode cannot be corrected, and the known technology cannot effectively detect the dead point, etc.

Active Publication Date: 2007-01-17
ICATCH TECH INC
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for correcting dead pixels of color images, so as to solve the problem that the correction cannot be made due to the degradation of photosensitive diodes, and at the same time solve the problem that the known technology cannot effectively detect dead pixels

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  • Method and system for correcting color-image bad point

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Embodiment Construction

[0025] For a description of the preferred embodiments of the present invention, please refer to figure 1 The block diagram shown. It is used to detect and correct dead pixels in a digital image, and the digital image is a Bayer type image. The system includes a point complement device 110 , a color difference generating device 120 , a dead point detection device 130 and a dead point correction device 140 .

[0026] The dot supplementing device 110 receives a pixel (i, j) and adjacent pixels in the digital image, and supplements the pixel (i, j) to have red, green and blue three-color signals. figure 2 It is a schematic diagram of complementary dots of a color Bell pattern image. The arrangement of pixels is formed by a row of GRGRGR and a row of BGBGBG alternately arranged. Each pixel has only one color value of red, green or blue. Therefore, it is necessary to reconstruct other non-existing color values ​​for each pixel by means of point complementing in the point comple...

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Abstract

The method thereof comprises: firstly restoring the Bell image captured from an image sensor into the red, green and blue colors corresponding to each pixel by using an interpolation approach; then the image is translated into the color-difference domain; on the color-difference domain, checking the dead pixel; using the pixels neighboring the dead pixel to correct the dead pixel. Because the pixel checking is made at color-difference domain such that the dead pixel is easier to be distinguished out than it's in RGB domain.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a color image dead point correction method and system. Background technique [0002] A color image processing system is mainly composed of an image capture unit, an image restoration and processing unit, an image display unit and an image compression unit. The image capture unit is composed of an image sensor. It is a photosensitive component composed of several photodiodes (photo-diodes) in a two-dimensional array. The photosensitive component converts the sensed light intensity into an electronic signal for the image restoration and processing unit to perform relevant image processing. However, due to unavoidable errors in the process, the photosensitive diodes in the image sensing device often have deviations. That is to say, the image sensing device may contain a plurality of defective pixels and cannot properly perform correct photosensitive conversion. On the c...

Claims

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Application Information

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IPC IPC(8): H04N5/217H04N9/04
Inventor 吴政育
Owner ICATCH TECH INC