应用喷墨印刷中网点扩大的物理和光学扩大模型，对误差扩散加网算法进行结合改进，提出了结合喷墨网点扩大效应的误差扩散算法加网模型，在图像加网处理过程中对网点扩大进行抑制，从而改善印品质量。

Physical and optical dot gain model in inkjet was applied to ameliorate error diffusion halftone algorithm. An error diffusion halftone algorithm was put forward, which considers dot gain effect of inkjet printing. The algorithm can depress dot gain in image screening process and improve print quality.