Title :
Perceptual impact of edge sharpness in images
Author :
Lin, W.S. ; Gai, Y.L. ; Kassim, A.A.
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
fDate :
4/6/2006 12:00:00 AM
Abstract :
A method based upon subjective viewing tests to evaluate the perceptual impact of different extents of edge sharpness is presented and the most eye-pleasing sharpness (MEPS) for an image edge-sharpening process is derived. The findings with Laplacian of Gaussian edge-enhancement filter show that the baseline MEPS is about 2.6 times that of the local just-noticeable difference, and the actual MEPS is also dependent on the contrast increase in the surrounding areas. The proposed methodology can be used to determine the MEPS for a particular edge-enhancement process, and the resultant formulation for the perceptual impact of edge sharpness can be used for reference in control of edge enhancement, image reconstruction and de-blurring processing, as well as objective visual quality gauge.
Keywords :
filtering theory; image enhancement; image resolution; Gaussian edge-enhancement filter; Laplacian; deblurring processing; image edge sharpness process; image reconstruction; most eye-pleasing sharpness; objective visual quality gauge; perceptual impact;
Journal_Title :
Vision, Image and Signal Processing, IEE Proceedings -
DOI :
10.1049/ip-vis:20050110