Enhanced error diffusion halftoning using edge information and linear gain

In this paper, we suggest the method that uses compensated multiplicative parameter according to the local characteristic. Firstly we use a linear gain between original image and the halftone image to calculate the multiplicative parameters that minimize quantization error of flat region. We represent the edge region by compensating multiplicative parameters. The proposed method reduces quantization error that causes sharpening. The proposed method yields the halftone image which is similar to the original image and improved in quality.