Portrait image color enhancement method and device
A color enhancement and image technology, applied in the field of image processing, can solve the problems of complex image color enhancement algorithm, slow running speed, stuck, etc., to achieve a good color enhancement effect, meet the needs of use, and achieve a good color enhancement effect.
Active Publication Date: 2019-07-12
CHENDU PINGUO TECH CO LTD
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Problems solved by technology
[0003]Existing image color enhancement algorithms are usually complex and occupy a large amount of memory on mobile devices
When the existing image color enhancement algorithm is applied to low-end and mid-end mobile devices with small memory, the running speed is slow, and the phenomenon of stuttering often occurs, resulting in poor user experience
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0031] figure 1 It is a method flowchart of an embodiment of the present invention, including:
[0032] Step 101, performing skin color point judgment on each pixel of the original portrait image to obtain the first skin area; the original portrait image is an RGB image;
[0033] In this embodiment, the skin color point judgment can be directly performed on each pixel of the original portrait image to obtain the human skin area in the original portrait image, that is, the first skin area; The skin color point is judged for each pixel of the image, and the human skin area in the zoomed image is obtained, that is, the second skin area. The original portrait image is reduced, keeping its original aspect ratio, and reduced to a minimum side length of about 300 pixel...
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The invention discloses a portrait image color enhancement method and device, and the method comprises the steps: carrying out the skin color point judgment of each pixel point of an original portraitimage, and obtaining a first skin region; converting each pixel point of the first skin region into an HSV format, and calculating an average brightness value and an average saturation value of the first skin region; calculating a brightness compensation value according to the average brightness value of the first skin region; calculating a saturation compensation value according to the average saturation value of the first skin region; converting the original human image into an HSV image; compensating the brightness of the HSV image according to the brightness compensation value, compensating the saturation of the HSV image according to the saturation compensation value, and obtaining a compensated HSV image; and converting the compensated HSV image into an RGB image, and obtaining a color enhanced image of the original human image. According to the technical scheme provided by the invention, real-time and smooth operation can be realized on the mobile equipment with a smaller memory, and the portrait enhancement effect is better.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for enhancing the color of a portrait image. Background technique [0002] Due to the camera performance of the mobile device itself or the ambient light, etc., the portrait images captured by the mobile device often have brightness distortion. This brightness distortion is specifically manifested as the image is too bright or too dark, and the image saturation is too low. Therefore, effect restoration for portrait images is an important part of post-image processing. Good image restoration software can enhance the color of images with distorted brightness to make up for the shortcomings of the previous shooting. [0003] Existing image color enhancement algorithms are usually complex and occupy a large amount of memory in mobile devices. When the existing image color enhancement algorithm is applied to low-end and mid-end mobile devices with small ...
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IPC IPC(8): G06T5/00
CPCG06T2207/10024G06T5/90
Inventor 龚彦铭徐滢
Owner CHENDU PINGUO TECH CO LTD