Title :
A quality measure for compressed image sequences based on an eye-movement compensated spatio-temporal model
Author :
Westen, Stefan J O ; Lagendijk, Reginald L. ; Biemond, Jan
Author_Institution :
Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands
Abstract :
We propose a vision model for predicting the perceptibility of coding errors in digital image sequences. Eye movements have a significant effect on distortion visibility, and hence they form an important part of the model. A modified motion estimator is used to predict the eye movements of a viewer when watching an image sequence. The spatio-temporal frequency sensitivity and masking effects are included in the model. The model is based on a decomposition of the signal into frequency and orientation bands to allow accurate modeling of spatial masking by a contrast transducer. We describe how the proposed quality measure can be used to compress image sequences using a constrained MPEG-2 encoder
Keywords :
coding errors; data compression; image coding; image sequences; motion compensation; visual perception; coding errors; compressed image sequences; constrained MPEG-2 encoder; contrast transducer; distortion visibility; eye-movement compensated spatio-temporal model; frequency band; masking effects; modified motion estimator; orientation bands; perceptibility; quality measure; spatial masking; spatio-temporal frequency sensitivity; vision model; Digital images; Distortion measurement; Frequency; Humans; Image coding; Image sequences; Motion estimation; Predictive models; Transducers; Visual system;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.647759
