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Method, device and image processing chip for adjusting image color saturation

An adjustment method and technology of an adjustment device are applied in the field of image processing to achieve the effect of reducing color noise and improving the expressiveness of details

Active Publication Date: 2018-11-06
APPOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide an image color saturation adjustment method, device, and image processing chip, aiming to solve existing problems

Method used

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  • Method, device and image processing chip for adjusting image color saturation
  • Method, device and image processing chip for adjusting image color saturation
  • Method, device and image processing chip for adjusting image color saturation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] figure 1 The implementation flow of the image color saturation adjustment method provided by Embodiment 1 of the present invention is shown. The method includes steps S1 to S3, which will be described in detail below.

[0054] Step S1: color gamut conversion, converting the pixels of the image from the RGB domain to the YCbCr domain.

[0055] In step S1, after color gamut conversion, the image is converted from the RGB domain to the YCbCr domain, and the Y, Cb, and Cr components of the pixel are obtained, where the Y component represents the brightness of the pixel, Cb represents the blue chroma component, and Cr represents the red color degree component.

[0056] Step S2: Calculation of the color saturation adjustment coefficient. According to the set threshold values ​​of multiple brightness intervals, determine the brightness interval to which the pixel belongs and calculate the saturation adjustment coefficient sat_rate.

[0057] Because human eyes are more sensit...

Embodiment 2

[0073] image 3 The image color saturation adjustment device provided by the second embodiment of the present invention is shown, which includes a color gamut conversion unit 21 , a color saturation adjustment coefficient calculation unit 22 and a color saturation adjustment unit 23 . It will be described in detail below.

[0074] The color gamut conversion unit 21 is used to convert the pixels of the image from the RGB domain to the YCbCr domain.

[0075] The color saturation adjustment coefficient calculation unit 22 is configured to determine the brightness interval to which a pixel belongs and calculate the color saturation adjustment coefficient sat_rate according to the set threshold values ​​of a plurality of brightness intervals.

[0076] The color saturation adjustment coefficient calculation unit uses the following formula to calculate the color saturation adjustment coefficient:

[0077] sat_rate=rate*(color_off-color_noise_th)+saturation,

[0078] Among them, ra...

Embodiment 3

[0091] like Figure 4 As shown, the third embodiment of the present invention provides an image processing chip in the embodiment of the present invention, which includes at least one processor 310, memory 320 and interface 330, and the at least one processor 310, memory 320 and interface 330 are connected by bus;

[0092] The memory 320 stores computer-executable instructions;

[0093] The at least one processor 310 executes the computer-executed instructions stored in the memory 320, so that the image processing chip executes the image color saturation adjustment method described in Embodiment 1.

[0094] To sum up, the image color saturation adjustment method, device and image processing chip of the present invention are used to set multiple brightness thresholds in the middle gray area to suppress the color saturation of the middle gray area of ​​the image, It can effectively reduce color noise at night when the illumination is low. Since the human eye is most sensitive ...

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Abstract

The invention is suitable for the technical field of image processing, and provides an adjusting method of image color saturation, a device and an image processing chip. The method comprises a color gamut conversion step, a color saturation adjusting coefficient computing step, and a color saturation adjusting step, wherein the color gamut conversion step comprises converting image pixel to YCBCr gamut from the RGB gamut; the color saturation adjusting coefficient computing step comprises judging the brightness section corresponding to the pixel according to threshold values of multiple set brightness sections and computing the color saturation adjusting coefficient sat_rate; the color saturation adjusting step comprises adjusting a pixel value of the image according to the color saturation adjusting coefficient sat_rate, wherein the adjusting formula is as follows: Cb=(Cb-128)*sat_rate, Cr=(Cr-128)*sat_rate. By use of the technical scheme provided by the invention, the chroma noise of the image in the low-brightness region can be effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image color saturation adjustment method, device and image processing chip. Background technique [0002] In the process of image acquisition and display, the color saturation of the image is often not enough, and the color saturation needs to be adjusted in image processing. [0003] For example, in the process of image acquisition, in order to maintain more details and suppress noise, the data collected by the sensor will lower the brightness of the image, and then undergo gamma correction, but the resulting image has low color saturation. [0004] The color saturation of the image after Gamma is low, so the saturation enhancement method will be used in the subsequent image processing. [0005] There are several commonly used ways to increase color saturation: [0006] 1 Processing in the R, G, and B domains, this method is simple, but it is prone to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/77H04N9/68
CPCH04N9/68H04N9/77
Inventor 旷开智
Owner APPOTECH
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