Objective picture quality scale (PQS) for image coding

Comparison of Wavelet Image Coders Using the PictureQuality Scale ( PQS )

Image coding is one of the most visible applications of wavelets. There has been increasing number of reports each year since the late 1980's on the design of new wavelet coders and variations to existing ones. In this paper, we report some results from our comparative study of wavelet image coders using a perception-based, quantitative picture quality scale as the distortion measure. Coders ar...

Reliability of Objective Picture Quality Measures

This paper investigates a set of objective picture quality measures for application in still image compression systems and emphasizes the correlation of these measures with subjective picture quality measures. Picture quality is measured using nine different objective picture quality measures and subjectively using Mean Opinion Score (MOS ) as measure of perceived picture quality. The correlati...

Perceptual-Based Objective Picture Quality Measurements

Understanding QMM Objective Picture Quality Measurements

Digital television broadcast systems based on MPEG can compress video information from hundreds of megabits to less than 5 Mbps with very little user perceived picture quality degradation. This is the case as long as everything goes well. However, given the complexity of today’s digital television broadcast chain, problems can give rise to poor picture quality being delivered to the end user. T...

Subjective Vs Objective Image Quality

Image quality demands have been investigated for different applications of stereoscopic evaluation. For that purpose, the quality of image pairs was judged by experienced stereo operators in subjective sc ales for contrast, sharpness, granularity, interpretability and overall quality. The judgment was made in real working situations with the images oriented in stereo instruments. The result sho...