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针对半调打印图象色调失真问题，给出一种基于伽玛变换和打印机模型的色调自补偿数字半调模型和相应的误差分散算法．与现有开环预补偿模型相比，新模型引入了反馈和自适应控制，提高了补偿精度．所给误差分散算法增加了补偿印点增益功能，可明显改善半调打印图象的质量．
Aiming at the problem of color tone distortion in halftoned images, a halftone model of color tone self-compensation based on Gamma transform and printer model and corresponding error dispersion algorithm are given. Compared with the existing open loop precompensation model, the new model introduces feedback and adaptive control, which improves the compensation accuracy. The proposed error dispersion algorithm adds the function of compensating the dot gain, which can obviously improve the quality of the half-tone printed image.