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Image sensor inter-pixel offset correction device and correction method thereof

An image sensor and offset correction technology, which is applied in image analysis, image communication, image data processing, etc., can solve problems such as grid noise and correction errors, reduce parts and assembly costs, reduce parts, and improve low image quality Effect

Inactive Publication Date: 2017-03-29
HYUNDAI MOBIS CO LTD
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  • Abstract
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Problems solved by technology

[0023] Therefore, the object of the present invention is to provide a pixel-to-pixel offset correction device of an image sensor, which can solve the problem of offset correction when there are dead pixels in the same pixel group when correcting the offset between Gr pixels and Gb pixels. Correction errors during the process lead to problems such as lattice noise
[0024] Another object of the present invention is to provide a method for inter-pixel offset correction of an image sensor, which can solve problems such as grid noise caused by correction errors during the offset correction process

Method used

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  • Image sensor inter-pixel offset correction device and correction method thereof
  • Image sensor inter-pixel offset correction device and correction method thereof
  • Image sensor inter-pixel offset correction device and correction method thereof

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Embodiment Construction

[0042] In one embodiment of the present invention, it is disclosed that when there are dead pixels in the same type of pixel group in the 5x5 window based on the mathematical formula calculation for Gr and Gb inter-pixel offset correction, by and except the dead pixels This is an inter-pixel offset correction method for an image sensor where offset correction occurs by calculating the same type of normal pixels.

[0043] In addition, an embodiment of the present invention discloses that the technical composition of identifying the edge (Edge) area is added to the inter-pixel offset correction method according to an embodiment of the present invention, and the edge area is bypassed during offset correction. A method of deskew that maintains sharpness in parts with contrast between light and dark.

[0044] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Image 6 is a block diagram showing an inter-p...

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Abstract

When the present invention corrects the offset between the Gr pixel and the Gb pixel, when there is a dead pixel (dead pixel) in the same type of pixel group in the window of a specific size used, the normal pixel of the same type except the dead pixel is corrected. Calculated to prevent errors that may occur during deskew. In addition, the edge (Edge) area recognition function has been added, and the offset correction of the Edge area is bypassed during offset correction to maintain the sharpness of parts with light and dark contrast.

Description

[0001] technology area [0002] The present invention relates to an inter-pixel offset correction device of an image sensor and a correction method thereof, in particular to an inter-pixel offset correction device for correcting the offset (offset or cross-talk) between Gr pixels and Gb pixels in a pixel and its Calibration method. Background technique [0003] In a CMOS image sensor (CMOS Image Sensor, hereinafter referred to as CIS), the image signal processing (ImageSignal Processing, hereinafter referred to as ISP) block is used as a block that corrects or processes the input image through a prescribed mathematical calculation method. Its main function is , to correct the inevitable image quality degradation caused by the physical structure of the pixel. [0004] figure 1 It is a drawing showing the general RGB color filter structure. [0005] refer to figure 1 , the ISP block is basically required to have, in use figure 1 The general RGB color filter shown is a funct...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/367
CPCH04N9/646G06T7/13
Inventor 金建杓
Owner HYUNDAI MOBIS CO LTD
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