A practical, real-time calibration of digital omnidirectional cameras in the areas of de-vignetting, brightness, contrast, and white balance control. Novel solutions for the color calibration of an omnidirectional camera rig, and an efficient method for devignetting images are presented. Additionally,...http://www.google.com.mx/patents/US7259784?utm_source=gb-gplus-sharePatent US7259784 - System and method for camera color calibration and image stitching
