For the sensitivity of Deng algorithm to noise, an adaptive image enhancement algorithm is proposed. According to the human visual properties, the algorithm uses the basic principle of the Deng algorithm to get automatic parameters of method adaptively. It can not only keep the original advantages such as easy realization、quick calculation, but also play a certain role in restraining noise. By comparing the result of adaptive image enhancement algorithm and that of other image enhancement algorithm, the adaptive image enhancement algorithm can get automatic parameters of method adaptively. Besides the easy realization of original Deng algorithm, it can improve the performance in restraining noise.