Hongmei Yang

A Quality Assessment of Watermarked Color Image Based on Vision Masking

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Author(s)

Hongmei Yang ^1,*

1. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao, China

* Corresponding author.

DOI: https://doi.org/10.5815/ijitcs.2010.02.07

Received: 14 May 2010 / Revised: 23 Jul. 2010 / Accepted: 2 Oct. 2010 / Published: 8 Dec. 2010

Index Terms

Digital watermarking, quality assessment, color image, vision masking, discrete cosine transform

Abstract

The quality assessment of the watermarked color image is one of the most important aspects that evaluate the performance of watermarking system. PSNR is the common quality assessment of the watermarked image. But the results measured by PSNR usually do not match to human vision well and result in misleading. The discrete cosine transform was used as the image analysis tools. The psychophysical research -- the luminance, texture, frequency and color masking on human vision were analyzed and used in masking strength calculation. Then a vision masking calculation method of image DCT coefficients was given in this paper. Based on the masking strength calculation, a new quality assessment of watermarked color image was proposed. Experimental results showed that the new quality assessment outperforms PSNR. The distorted image quality values calculated using the new quality assessment are consistent with the perception of human vision and have high correlation and consistency with subjective values.

Cite This Paper

Hongmei Yang, "A Quality Assessment of Watermarked Color Image Based on Vision Masking", International Journal of Information Technology and Computer Science(IJITCS), vol.2, no.2, pp.47-54, 2010. DOI: 10.5815/ijitcs.2010.02.07

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International Journal of Information Technology and Computer Science (IJITCS)