Abstract: Considering characteristics of the cannon barrel image, a new method for image enhancement based on human eye visual property was proposed. Which can improve the observation effect on the spying bore image and diminish the target image ambiguity casued by background and noise. It is the method in which different processing is applied according to the image feature diversity between target and background-noise.In this method, the imperfect view in a image is correspondingly enhanced, and the target is thus prominent, which is convenient for human eye observation.