Abstract
Image sharpness is an important factor for image quality evaluation. This paper investigates the effect of dot misregistration to the sharpness of ink jet image on various type of papers. The printed one-pixel line images are simulated using the proposed ink jet printer model. The model simulates each digital halftone dot in a high resolution grid using ink spread function and optical point spread function of paper. The variables in the experiment are the degree of dot misregistration and optical point spread function of paper. Fourier analysis is applied to those simulated images and the sharpness parameter is evaluated and compared. The results show that when dot misregistration is about 1/3 of dot diameter off its intent location, the MTF at 6 cy/mm is lower than 0.5 therefore poor sharpness is observed.
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