Patent ID: 8208758

Claim:
A method comprising: receiving a video frame of a video sequence by a camera processing module of a video processing system from a video sensor, wherein the video processing system includes at least one processor; performing a correlation of a skin color reflectance spectra of the video sensor and a reflectance spectra of a testing target by a sensor calibration module of the video processing system, wherein the testing target comprises a plurality of color patches and the reflectance spectra of the testing target is determined by a linear combination of a reflectance spectra of each of the color patches adjusted by a set of weighting factors derived from a skin color reflectance database; generating a plurality of sensor statistics for the video sensor using the correlation by the sensor calibration module of the video processing system, wherein each of the sensor statistics corresponds to one of a plurality of illuminant types; estimating the illuminant type of the video frame by the sensor calibration module of the video processing system; selecting sensor statistics corresponding to the estimated illuminant type by the sensor calibration module of the video processing system; and automatically detecting a region of interest (ROI) within the video frame based on the selected sensor statistics by a ROI detector of the video processing system.