Weak Underwater Laser Image Target Detection Based on K-L Transform

In allusion to characteristics of low contrast, small dimension of target and complexity of background in underwater laser image, a method of detecting and describing underwater laser weak target using decorrelation trait of orthogonal transform is presented. K-L transform trace matrix that describes most image energy, shape distributing and also extrudes difference between target and background is used to detect the weak target. The results of computer simulation demonstrate that the proposed method can efficiently detect weak target in low signal-to-noise ratio underwater laser image.