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Image processing method and its device

An image processing device and image processing technology, which are applied in the directions of image communication, color signal processing circuit, luminance and chrominance signal processing circuit, etc. Problems such as slow processing speed

Inactive Publication Date: 2007-08-01
VIMICRO CORP
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Problems solved by technology

[0009] In step 2), the back-end color processing method of the above pixel data needs to perform a table lookup operation on the R, G, and B components of each pixel of the pixel data, And in steps 1), 3), 4), and 5), it is necessary to perform multiple multiplication and addition operations, the processing speed is slow, and the corresponding image processing chip takes up a lot of logic, and the chip area is large, so power consumption and design and production The cost is higher

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  • Image processing method and its device
  • Image processing method and its device

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Embodiment Construction

[0034] The basic idea of ​​the present invention is to use a single processing matrix to linearly process pixel data, and to use Y gamma operation instead of RGB gamma operation, so that the back-end color processing speed of the image is greatly improved.

[0035] As mentioned above, the image back-end processing in the prior art usually needs to perform RGB gamma operation after color correction of pixel data. This operation is a non-linear look-up table operation. RGB to YUV, Linear operations such as tone adjustment. Since the human eye is more sensitive to brightness than chrominance data, replacing the above-mentioned RGB gamma operation with Y gamma operation can not only reduce the number of table lookups, but also improve the image processing effect.

[0036] The image processing method of the present invention will be described in detail below with reference to the drawings and embodiments.

[0037] FIG. 2 is a step-by-step analysis flowchart of the image processing...

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Abstract

The image process method comprises: A. multiplying these linear-calculation matrixes, including the transition matrix to transfer pixel RGB data into color space with separated brightness and chroma into a unique processing matrix; and B. multiplying the said unique matrix to pixel EGB data to obtain the pixel point data with separated brightness and chroma, then taking Gamma correction for brightness component. This invention increases processing speed, reduces difficulty on chip design and production, and decreases power consumption and cost.

Description

technical field [0001] The invention relates to an image processing device and a processing method thereof. Background technique [0002] After the digital image capture device processes the image data collected by the image sensor into pixel data in the RGB color space, it usually needs to perform color correction, color space conversion, hue adjustment, saturation adjustment, and Y gamma (Gamma). End-to-end color processing for clearer, more vibrant images. As shown in Figure 1, it includes the following processes: [0003] 1) Color correction: Correct the pixel RGB data obtained by processing the image data collected by the image sensor (such as various interpolation processing) to obtain the standard RGB data of the pixel to obtain an image with more vivid colors; this operation passes Multiply the input data by a 3×3 color correction matrix to achieve; [0004] 2) RGB Gamma: Through the table lookup operation, the R, G, and B component data are respectively gamma cor...

Claims

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Application Information

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IPC IPC(8): H04N9/64H04N9/68H04N9/69H04N9/78H04N1/60H04N1/56
Inventor 沈操王浩
Owner VIMICRO CORP
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