Quality Measures Using Singular Value Decomposition: Comparison of Three Full-Reference Color Image Quality Measures
Final rept. 1 Dec 2005-30 Nov 2006
CITY UNIV OF NEW YORK RESEARCH FOUNDATION
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Image quality assessment plays a major role in many image processing applications. Although much effort has been made in recent years towards the development of quantitative measures, the relevant literature does not include many papers that have produced accomplished results. Ideally, a useful measure should be easy to compute, independent of viewing distance, and able to quantify all types of image distortions. In this paper, we will compare three full-reference full-color image quality measures M-DFT, M-DWT, and M-DCT. Assume the size of a given image is nxn. The transform DFT, DWT, or DCT is applied to the luminance layer of the original and degraded images. The transform coefficients are then divided into four bands, and the following operations are performed for each band. Finally, the mean of the four standard deviations is obtained to produce a single value representing the overall quality of the degraded image.