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Digital imaging device and image processing method thereof

A technology of image processing and digital photography, applied in the field of image processing, which can solve the problem of not being able to significantly and effectively correct defective pixels

Active Publication Date: 2014-07-09
HIMAX IMAGING LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some cases, the calculated correction value still cannot significantly and effectively correct the defective pixels

Method used

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  • Digital imaging device and image processing method thereof
  • Digital imaging device and image processing method thereof
  • Digital imaging device and image processing method thereof

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Experimental program
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Embodiment Construction

[0014] First, please refer to figure 2 , is a block diagram of a digital camera according to an embodiment of the present invention. Such as figure 2 As shown, the digital camera 2 includes a photosensitive element 21 , a defective pixel determination unit 23 , a defective pixel correction (Bad Pixel Correction, BPC) processor 25 , a digital processing unit 27 and a storage unit 29 . The digital camera 2 is used to capture images, and it uses a color filter array (Color Filter Array, CFA) (not shown in the figure) covered with a Bayer pattern on the photosensitive element 21 to generate a Bayer pattern pixel array image .

[0015] The defective pixel judging unit 23 is coupled to the photosensitive element 21, and is used for judging whether there is a defective pixel in the pixel array image; Defective pixels are corrected. The digital processing unit 27 is used to process the pixel array image with all defective pixels corrected, such as Bayer Pattern Interpolation, si...

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Abstract

The invention provides an image processing method which is applied to a pixel to be measured in the center of a pixel array. The pixel to be measured has a value of the pixel to be measured. The image processing method includes the following steps of: firstly determining whether the value of the pixel to be measured is greater than a correction threshold value or not; then if the value of the pixel to be measured is greater than the correction threshold value, carrying out weight calculation on values of a plurality of same color pixels which are symmetric with same color pixels with a maximum pixel value, carrying out weight calculation on an operation result and the value of the pixel to be measured, and replacing the value of the pixel to be measured.

Description

technical field [0001] The invention relates to an image processing method, in particular to a digital camera device for detecting and correcting defective pixels and an image processing method thereof. Background technique [0002] Most of the current digital imaging technologies use Complementary Metal-Oxide Semiconductor (CMOS) as the photosensitive element, and cover it with a layer of color filter array (Color Filter Array, CFA) to capture the captured image The three primary colors of red, green and blue (RGB) are separated to generate a pixel array image conforming to the Bayer Pattern, such as figure 1 As shown, it is a 5×5 pixel array 1, where R represents red, B represents blue, and G represents green. [0003] However, the adjacent pixels in the captured pixel array 1 will interfere with each other, or the circuit defect of the CMOS photosensitive element in the process may produce defective pixels (Bad Pixel), which will cause special appearance in the processed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/367
Inventor 蔡易霖
Owner HIMAX IMAGING LIMITED