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Hongmei Yang

Work place: College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao, China

E-mail: yhm1998@163.com

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Research Interests: Computer systems and computational processes, Embedded System, Systems Architecture, Information Systems, Information Storage Systems, Multimedia Information System

Biography

Hongmei Yang was born in shanxi, P.R., China in 1969, earned B.S. degree in the field of computer science and technology in 1992, M.S. degree in the field of multimedia application technology in 2003 and Ph.D. in the field of digital watermarking in 2009 from Shandong University of Science and Technology, P.R. China.
She is now an ASSOCIATE PROFESSOR at the Shandong University of Science and Technology (SUST), Shandong, China. Before joining SUST, she was an assistant engineer at Tai’an generator plant during 1992-1995 and was an engineer at People's Government of Tai’an during 1995-2002. Recently she has published 12 research papers in the area of Digital
Watermarking and Communication.
Dr. Yang takes part in many research projects in the area of digital watermarking and anti-counterfeiting at present. Her research work is supported by the Encouragement Foundation
for Excellent Young and Middle-aged Scientists of Shandong Province under Grant No.BS2010DX026, Project of Shandong Province Higher Educational Science and Technology Program under Grant No.J10LG24 and the Shandong Provincial Natural Science Foundation under Grant No.Y2008G11. Her current research interests include digital watermarking,
anti-counterfeiting and embedded system.

Author Articles
A Quality Assessment of Watermarked Color Image Based on Vision Masking

By Hongmei Yang

DOI: https://doi.org/10.5815/ijitcs.2010.02.07, Pub. Date: 8 Dec. 2010

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.

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