Halftone is a technique used for binary devices such printers to simulate the continuous tone image. But the quality of halftone prints produced by printers can be limited by dot gain and dot-placement errors. In this paper, we propose a variable printer model which can be combined in tone-dependent error diffusion (TDED). First we analyses the characteristic of the test printer, and based on the experimental data we propose a variable inkjet printer model. With this printer model, TDED algorithm shows better quality than traditional.
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