This paper proposed an image enhancement method with optimization problem as the lack of adaptability of traditional methods.Firstly,it presented a QPSO-tp algorithm.And standard test function experimental results show that the improved algorithm is superior to original QPSO algorithm on global search ability and convergence accuracy,and it has few adjustable parameters and stronger randomness.Secondly,it processed the nonlinear-transform enhancement of remote sensing gray-scale image with the QPSO-tp algorithm for optimization parameters.The experimental results show that the image enhancement effect is improved significantly.