An effective image halftoning and inverse halftoning technique based on HVS

In this paper we propose an effective image halftone and inverse technique based on HVS function. First, a new quantity PPSNR is defined to measure the difference between new image and the original image, at the same time new error diffusion coefficients are constructed to give a halftone image with better texture, contrast, last a new low pass filter is constructed to inverse the halftone with a higher PSNR and PPSNR. The proposed algorithm is significantly simpler than most existing algorithms. We also present experiment result to demonstrate the effectiveness of the proposed algorithm.