Image interpolation method and device

An interpolation method and interpolation direction technology, applied in the field of image processing, can solve the problems of poor image interpolation effect and high complexity of image interpolation method

Active Publication Date: 2015-06-24
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0005] The problem solved by the present invention is that in the image interpolation method, there are false color phenomena in the interpolated image, the image interpolation effect is poor, and the image interpolation method has high complexity

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Embodiment Construction

[0102] In the prior art, in the image interpolation method, there are problems of false color phenomenon in the interpolated image, poor image interpolation effect, and high complexity of the image interpolation method.

[0103] In order to solve the above problems, the technical solution of the present invention provides an image interpolation method.

[0104] For each pixel in the CFA image, there is only one color pixel value in the original image. To form a color image, each pixel needs to be interpolated to a pixel value containing green, red and blue, and each of the original CFA images needs to be The other two colors missing from the pixel are interpolated.

[0105] Since in the CFA image, the pixels of the green component account for half of the total pixels of the image, the pixels of the green component have more image detail information and have better correlation. Usually, in the image In the interpolation processing, the interpolation algorithm usually starts fr...

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Abstract

The invention discloses an image interpolation method and a device. The method comprises steps: on the basis of color component values of a pixel point, regional division is carried out on the image, wherein the image is stored in a CFA data format; on the basis of gradient values of the pixel point, interpolation directions of a green component of the pixel point in a blue channel and a red channel are determined; on the basis of the interpolation direction of the green component, weights of the green component of the pixel point in the blue channel and the red channel are determined; on the basis of the regional division, the interpolation direction of the green component of the pixel point and the weight of the green component of the pixel point, interpolation of the green component of each pixel point in the blue channel and the red channel is acquired; and on the basis of the interpolation of the green component, the red component interpolation and the blue component interpolation of the pixel point of each channel are acquired. The difference between the interpolation result and the original real image can be effectively reduced, the image has good interpolation effects, false color generated in the case of interpolation of the CFA image can be effectively reduced, and the interpolation method is simple and easy to realize.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image interpolation method and device. Background technique [0002] Color digital images usually use the three primary colors of red, green and blue to represent the color value. Most digital cameras use a single CCD or CMOS image sensor. Usually, the image sensor obtains the color information in the color filter array (CFA, Color Filter Array) format. , images can be stored in the CFA data format. In the CFA image, there is only one color component value in each pixel of the red primary color, green primary color or blue primary color, and the other two color components are interpolated according to their neighboring pixels to obtain two color component interpolations. The technique is called "demosaicing". At present, the most widely used CFA image is the Bayer model. In the Bayer pattern, among every four adjacent pixels, there are two green primary color pixels, one red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/40H04N9/04
Inventor 何恩阳
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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