In order to imitate the image distortion

which is aroused additional processing in the process of printer

factually

to show the image print effect. Based on analyzing the existed printer model

a print analogue algorithm is proposed. It can accomplish the model of printer

by imitating the image resolution and the change of gray-level in the process of printer

exerting halftone and dot gain. Experimental results show that the average gradation of the model is 1.448 compared to the actual printer image.