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Method and system for correcting color-image bad point

A correction method and technology for dead pixels, which are applied to components of color TVs, components of color TVs, and TV systems, etc., can solve the problems that the known technology cannot effectively detect dead pixels, and the photosensitive diode cannot be corrected.

Active Publication Date: 2008-10-08
ICATCH TECH INC
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  • Application Information

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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 the description of the preferred embodiments of the present invention, please refer to figure 1 Block diagram shown. It is used to detect and correct dead pixels in a digital image, which is a Bayer type image. The system includes a dot compensation device 110, a color difference generating device 120, a dead pixel detection device 130, and a dead pixel correction device 140.

[0026] The dot-compensating device 110 receives a pixel (i, j) to be detected and neighboring pixels of the pixel to be detected in the digital image, and complements the pixel to be detected (i, j) to have red, green, and Blue tricolor signal. figure 2 It is a schematic diagram of the complementary point of a color Bell type image. Pixels are arranged in a row of GRGRGR and a row of BGBGBG alternately arranged. Each pixel to be detected is only one of the color values ​​of red, green or blue. Therefore, it is necessary to use the dot-filling method in the dot-compensating device 110 to reconst...

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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 method and system for correcting color images with dead pixels. 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 capturing unit is composed of an image sensor. It is a two-dimensional array of photosensitive components composed of several photosensitive diodes (photo-diodes). The photosensitive component converts the sensed light intensity into an electronic signal for the image restoration and processing unit to perform related image processing. However, due to unavoidable errors in the process, the photosensitive diodes in the image sensing device often have deviations. That is, the image sensing device will contain multiple defective pixels and cannot properly perform the correct light sensing conversion. On t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/217H04N9/04
Inventor 吴政育
Owner ICATCH TECH INC