Engineering observations from spatiovelocity and spatiotemporal visual models

A model describing the envelope of visual spatial sensitivity as a function of retinal velocities has been revisited. This spatiovelocity CSF model has been extended to include the effects of three types of eye movements: natural drift, smooth pursuit, and saccadic. Together, these extend the model from retinal velocities to image plane velocities in the context of natural viewing conditions. It is more straightforward to incorporate the effects of eye movements in a spatiovelocity CSF than in a spatiotemporal CSF generated from counterphase flicker stimuli. However, once the eye movements are incorporated, the spatiovelocity CSF can be rotated into a spatiotemporal CSF that is valid for unconstrained natural viewing conditions. The resulting visual model will be analyzed with respect to some of the key HDTV and computer graphics display formats.

[1]  Reginald L. Lagendijk,et al.  Spatiotemporal model of human vision for digital video compression , 1997, Electronic Imaging.

[2]  Eileen Kowler,et al.  Voluntary selection of the target for smooth eye movement in the presence of superimposed, full-field stationary and moving stimuli , 1984, Vision Research.

[3]  B. Spehar,et al.  Surround effects on the shape of the temporal contrast-sensitivity function. , 1997, Journal of the Optical Society of America. A, Optics, image science, and vision.

[4]  Tadahiko Fukuda,et al.  Quantitative Evaluation of Eye Movements as Judged by Sight-Line Displacements: Comparison of Eye-Movement Patterns during 525-Line and HDTV Viewing, and Evaluation of Moving Images , 1986 .

[5]  L. Kaufman,et al.  Handbook of perception and human performance , 1986 .

[6]  J J Koenderink,et al.  Spatiotemporal contrast detection threshold surface is bimodal. , 1979, Optics letters.

[7]  William F. Schreiber.  Psychophysics and the Improvement of Television Image Quality , 1984 .

[8]  A. Pantle,et al.  Velocity-sensitive elements in human vision: initial psychophysical evidence. , 1968, Vision research.

[9]  Bernd Girod,et al.  Eye Movements And Coding Of Video Sequences , 1988, Other Conferences.

[10]  D. Tolhurst.  Separate channels for the analysis of the shape and the movement of a moving visual stimulus , 1973, The Journal of physiology.

[11]  L. Festinger.  EYE MOVEMENTS AND PERCEPTION , 1971 .

[12]  D. Robinson.  The mechanics of human smooth pursuit eye movement. , 1965, The Journal of physiology.

[13]  C. Tyler.  Analysis of visual modulation sensitivity. III. Meridional variations in peripheral flicker sensitivity. , 1987, Journal of the Optical Society of America. A, Optics and image science.

[14]  Jeffrey B. Mulligan,et al.  Nonlinear combination rules and the perception of visual motion transparency , 1993, Vision Research.

[15]  Regis J. Crinon,et al.  Motion estimation: the concept of velocity bandwidth , 1992, Other Conferences.

[16]  Andrew B. Watson,et al.  Separability of Spatiotemporal Spectra of Image Sequences , 1992, IEEE Trans. Pattern Anal. Mach. Intell..

[17]  Scott J. Daly,et al.  Visible differences predictor: an algorithm for the assessment of image fidelity , 1992, Electronic Imaging.

[18]  R. F. Hess,et al.  Temporal properties of human visual filters: number, shapes and spatial covariation , 1992, Vision Research.

[19]  Michael P. Eckert,et al.  The significance of eye movements and image acceleration for coding television image sequences , 1993 .

[20]  D. Robinson,et al.  The upper limit of human smooth pursuit velocity , 1985, Vision Research.

[21]  A. Watanabe,et al.  Spatial sine-wave responses of the human visual system. , 1968, Vision research.

[22]  Andrew B. Watson,et al.  Window of visibility: a psychophysical theory of fidelity in time-sampled visual motion displays , 1986 .

[23]  Peter G. J. Barten,et al.  Contrast sensitivity of the human eye and its e ects on image quality , 1999 .

[24]  Wa James Tam,et al.  Temporal frequency discrimination of moving stimuli , 1993, Electronic Imaging.

[25]  J. Robson.  Spatial and Temporal Contrast-Sensitivity Functions of the Visual System , 1966 .

[26]  G. Westheimer.  Eye movement responses to a horizontally moving visual stimulus. , 1954, A.M.A. archives of ophthalmology.

[27]  H. Collewijn,et al.  Human smooth pursuit: Effects of stimulus extent and of spatial and temporal constraints of the pursuit trajectory , 1986, Vision Research.

[28]  D. H. Kelly.  Motion and vision. II. Stabilized spatio-temporal threshold surface. , 1979, Journal of the Optical Society of America.