Variability of Spatial Resolution Estimates Obtained Using a CCD Camera

摘要

We have previously developed techniques for measuring the spatial resolution of flight simulator displays. In the present experiment, we estimate the relative variability of the measurement technique and the display projectors they were designed to assess. We use the ratio of the standard deviation and mean of the resolution estimates as a measure of variability. Variability was found to be about 1.3% for grating transparencies illuminated by a stable light source. This value may be taken as the inherent variability of our measurement hardware and analysis procedures. Analogous measurements made on cathode ray tube (CRT) projectors resulted in a mean variability of about 4.3%. The difference between the two estimates, 3.0%, may be taken as a measure of the variability of the CRT projectors alone.