Aiming at the complex conditions of sea surface and the infrared image of thermal wake of ship which is disturbed severely and hard to be discriminated,original image is divided into object area and background area by gray level and gradient mapping (GGM) function. Then the image is improved by erosion,dilation and thinning of image morphology. The edges of thermal wake of ship are protruded and the result is satisfied. So,scientific bases are available for the infrared detection of submarines.
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李恪,王江安,郭谊.基于灰度梯度映射函数的舰船热尾流红外图像分割[J].激光与红外,2007,37(11):1223~1225 LI Ke, WANG Jiang-an, GUO Yi. Study of Infrared Image Enhancement about the Thermal Wake of Ship[J]. LASER & INFRARED,2007,37(11):1223~1225