Radiometric Calibration

Abstract

The subject of this chapter is radiometric calibration. This is the conversion of the input image values to a common radiometric scale. The transformation to such a scale is of critical importance in image fusion. Without a common radiometric base it is not possible to fuse images which were acquired at different illuminations, or under different atmospheric conditions or captured by different sensors. Radiometric calibration is used in both image fusion and in feature map fusion. For the sake of concreteness, we shall concentrate on the radiometric calibration of two input images A and B.