Study on Threshold Patterns with Varying Illumination Using 1.3m Imaging System

Human eye can generally distinguish objects from each other or from their background, if the difference in luminance or color is large. This paper concentrates on the luminance portion and makes an attempt to char-acterize perception detection to varying contrast which is explained in contrast sensitivity terms. This is ac-complished using sinusoidal test patterns. Influence of illumination on perception threshold is also shown in this paper. Practical measurements are done using a calibrated monitor with image capture accomplished with a 1/4" 1.3M camera module system.