Extract brightest pixel from an optical image and return it as an OI OImax = oiExtractBright([OI]) Make a 1 pixel optical image with a spectral illumination of the highest illuminance pixel. The optics settings are adjusted so that OTF and off-axis computations are skipped. This is used in setting exposure duration (autoExposure) and other OI evaluations. Example: OImax = oiExtractBright; Copyright ImagEval Consultants, LLC, 2003.