Image optimization method and related device

An image optimization device, comprising:

• a detecting unit, configured to detect an image;
• a determining unit, configured to determine a skin color region and a non-skin color region of the image;
• and
• an optimization unit, configured to determine a number T of expansion regions according to the skin color region, and perform a saturation optimization process on the T expansion regions, wherein the non-skin color region includes the T expansion regions, the number T is a positive integer, a saturation of a first pixel in the expansion region after the saturation optimization process is a first saturation, a saturation of a second pixel in the expansion region after the saturation optimization process is a second saturation, the first saturation is greater than or equal to the second saturation when a distance of the first pixel from the skin color region is greater than a distance of the second pixel from the skin color region, wherein in determine a number T of expansion regions according to the skin color region and perform a saturation optimization process on the T expansion regions, the optimization unit is specifically configured to:
• S1:
• acquire a structure element and a total number T of times of expansion;
• S2:
• determine T weights according to the total number T of times of expansion, wherein the T weights correspond to the T times of expansion operations one by one, and the T weights increase as the number of times of expansion increases;
• S3:
• expand a pre-expansion region according to the structural element to obtain a post-expansion region;
• wherein the post-expansion region consists of the pre-expansion region and the expansion region;
• in the first expansion operation, the pre-expansion region is the skin color region;
• and the post-expansion region serves as the pre-expansion region in the next expansion operation;
• S4:
• adjust the saturation of the expansion region to a saturation corresponding to a weight ri, wherein the weight ri is the weight corresponding to the expansion operation of this time, and the weight ri is in direct proportion to the saturation corresponding to the weight ri;
• and
• S5:
• cycle the steps S3-S4 until the number of times of expansion is T.