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Image processing method based on Bayer arrangement

An image processing and image technology, applied in image data processing, image enhancement, image analysis, etc., can solve problems such as direction judgment difficulties, reduce visual artifacts, etc., reduce false colors, reduce interpolation errors, and improve interpolation performance Effect

Active Publication Date: 2019-08-16
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above problems, the present invention provides an image processing method based on Bayer arrangement, which uses G pixel units to provide direction determination information for the interpolation of R pixel units and B pixel units, and overcomes the problem caused by sparse sampling of R pixel units and B pixel units. Difficult to judge the direction to achieve the purpose of reducing visual artifacts

Method used

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  • Image processing method based on Bayer arrangement
  • Image processing method based on Bayer arrangement
  • Image processing method based on Bayer arrangement

Examples

Experimental program
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Effect test

Embodiment 1

[0111] Please refer to the attached figure 2 with 3 , a kind of image processing method based on Bayer arrangement provided by the present invention, comprises the following steps:

[0112] S01: Obtain a Bayer image from a photosensitive element covered with a color filter array, as shown in the attached figure 2 Shown; G channel interpolation is performed in the R pixel unit and B pixel unit in the Bayer image. For example, using the adaptive difference method in the R pixel unit R 33 The specific method for G channel interpolation in :

[0113]

[0114] When ΔH<ΔV,

[0115] G 33 =(G 32 +G 34 ) / 2+[2R 33 -(R 31 +R 35 )] / 4;

[0116] When ΔH>ΔV,

[0117] G 33 =(G 23 +G 43 ) / 2+[2R 33 -(R 13 +R 53 )] / 4;

[0118] When ΔH=ΔV,

[0119] G 33 =(G 23 +G 43 +G 32 +G 34 ) / 4+[4R 33 -(R 13 +R 53 +R 31 +R 35 )] / 8.

[0120] S02: Calculate the edge judgment operator of the G pixel unit, and calculate the direction judgment operator corresponding to the G pix...

Embodiment 2

[0159] Please refer to the attached figure 2 with 3 , a kind of image processing method based on Bayer arrangement provided by the present invention, comprises the following steps:

[0160] S01: Obtain a Bayer image from a photosensitive element covered with a color filter array, as shown in the attached figure 2 Shown; G channel interpolation is performed in the R pixel unit and B pixel unit in the Bayer image.

[0161] S02: Calculate the edge judgment operator of the G pixel unit, and calculate the direction judgment operator corresponding to the G pixel unit according to the relative size of the edge judgment operator, combine the edge judgment operator and the direction judgment operator, in the G pixel unit Perform B channel interpolation and R channel interpolation, such as for G 32 point, G pixel unit G 32 The calculation methods of the corresponding edge judgment operators ΔL and ΔP are:

[0162]

[0163] If ΔL32 In the centered 3x3 window, there is a referen...

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Abstract

The invention discloses an image processing method based on Bayer arrangement, and the method comprises the following steps of S01, obtaining a Bayer image from a photosensitive element covered with acolor filter array, and carrying out the G-channel interpolation in an R pixel unit and a B pixel unit of the Bayer image; S02, calculating an edge judgment operator of the G pixel unit; calculatinga direction judgment operator corresponding to the G pixel unit according to the relative size of the edge judgment operator; carrying out B-channel interpolation and R-channel interpolation in the Gpixel unit by combining the edge judgment operator and the direction judgment operator; and S03, performing R-channel interpolation and B-channel interpolation in the B pixel unit and the R pixel unitrespectively. According to the image processing method provided by the invention, the G pixel unit is used for providing the direction judgment information for interpolation of the R pixel unit and the B pixel unit, the problem of direction judgment difficulty caused by the sparse sampling of the R pixel unit and the B pixel unit is solved, and the purpose of reducing the visual artifacts is achieved.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to an image processing method based on Bayer arrangement. Background technique [0002] Nowadays, most digital cameras and consumer electronics products use CMOS or CCD cameras to collect images. The optical image signal output by the photosensitive array is an analog signal, which is converted into a digital signal by AD and saved, and the original image data saved is processed. Extensive post-processing operations. The order of various post-processing operations can be adjusted. Demosaic color interpolation is an important operation at the front end of the post-processing pipeline, and its interpolation effect will affect the subsequent series of operations. The demosaicing operation is an important link in the image signal processing pipeline, and is widely used in image acquisition devices. [0003] The most widely used technique in digital cameras is to cover a color f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64H04N5/225G06T7/13G06T5/00
CPCH04N9/64G06T7/13G06T2207/10024H04N23/54H04N23/55G06T5/94
Inventor 袁小军李琛王鹏飞周涛余学儒段杰斌王修翠傅豪张飞翔
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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