Summary: Spatiotemporal discrimination model
predicts temporal masking functions
a a b
Albert J. Ahumada, Jr. , Bettina L. Beard , and Robert Eriksson
ASA Ames Research Center, Mail Stop 2622, Moffett Field CA 94035
b Institute for Optical Research, Stockholm, Sweden
e present a simplified dualchannel discrimination model with spatiotemporal filters to represent the
visual system contrast sensitivity, and masking based on local spatiotemporal contrast energy. The contras
ensitivity filter parameters of the model were based on previous work. The masking and global sensitivity
parameters are calibrated to masking data using brief grating target signals masked by a 700 msec grating wit
he same spatial parameters.
Keywords: video, image quality, masking, vision models, target detection.