SOLUTION TO SPATIAL INHOMOGENEITY ON VIDEO MONITORS

One problem with the use of computer graphics monitors in vision exper iments is spatial inhomogeneity: phosphor output intensity can vary be tween screen locations. This feature complicates accurate display of s timuli-either output must be confined to a small portion of the screen or variability must be accepted. We have developed a platform-indepen dent spatial compensation algorithm to correct for variance in output luminances over the surface of the screen. We have implemented and tes ted this algorithm on our own graphics system. (C) 1993 John Wiley Son s, Inc.