Image saturation nonlinear enhancement method

• Main Authors: DAI SHENGKUI, WANG ZIYU, WU SHILONG, ZHU YIMING
• Format: Patent
• Language: Chinese; English
• Published: 15.05.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention relates to an image saturation nonlinear enhancement method, which comprises the following steps that in an RGB color space, a proportion value of each color component in each pixel is calculated; according to the characteristics of the achromatic pixel values, key control parameters are set, and the design thought is that the achromatic pixel values are finally kept unchanged; nonlinear companding processing is carried out on the color component proportion value, wherein the design thought of a companding function is to enable the achromatic component proportion value to be a constant 1; and power function processing is carried out on the color component proportion value again, enhancement processing is carried out on the color component according to the adjusted component proportion value, and finally an RGB color image after saturation enhancement is obtained. The method is used for enhancing the color saturation of the color picture and improving the color brightnessand the visual perception