Radio metric alignment and vignetting calibration

This paper describes a method to photometrically align reg- istered and overlapping images which have been subject to vignetting (ra- dial light fallo), exposure variations, white balance variation and non- linear camera response. Applications include estimation of vignetting and camera response; vignetting and exposure compensation for image im- age mosaicing; and creation of high dynamic range mosaics. Compared to previous work white balance changes can be compensated and a com- putationally ecient algorithm is presented. The method is evaluated with synthetic and real images and is shown to produce better results than comparable methods.