Infrared image contrast enhancement method based on histogram dual gamma correction

• Main Authors: DAI SHENGKUI, CHEN XIANGCHENG, WU SHILONG, ZHANG CHAO
• Format: Patent
• Language: Chinese; English
• Published: 15.05.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses an infrared image contrast enhancement method based on histogram dual gamma correction. According to the technical scheme, the infrared image contrast enhancement method comprises the steps of calculating the theoretical gray scale range and the effective gray scale series of an image; performing histogram mean value normalization processing; counting the effective gray scale proportion in the histogram, and calculating to obtain correction parameters Gamma0 and Gamma1; classifying the histogram data, and then respectively carrying out power exponent correction of whichthe parameters are Gamma0 and Gamma1; and obtaining a mapping table by using the corrected histogram, and performing table lookup replacement operation on all data according to the mapping table to finally obtain a contrast enhanced image. According to the method, the histogram of the whole image needs to be counted; other operations adopt a point processing algorithm; therefore, the processing efficiency is high, few re