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PSNR在网目调数字图像质量评价中的应用研究
Application Study of PSNR in Quality Evaluation of Digital Halftone Image
The disadvantages of PSNR in digital halftone image’s quality evaluation were demonstrated. Algorithm of PSNR was improved and blocked PSNR was put forward to decrease the dependence of tone distribution and increase the consistency between evaluation result and people’s visual recept. Experimental result showed that method is available in evaluation of digital halftone images.