Photometric correction of lunar image from CCD stereo camera on Chang'E-1 satellite of China
In order to obtain the coefficients of the phase function with better fitting effect and accurate results, photometric correction is performed by the improved Lomme-Seeliger model with the lunar image from CCD stereo camera on Chang'E-1 satellite (CE-1) of China. By effective correction, the impact on image from the solar incidence angle (the incidence angle) and instrument viewing angle (the emission angle) is removed to match better with the variable trend of the phase angle. Then photometric correction is carried out pixel by pixel using the improved Lommel-Seeliger photometric correction model on the CCD stereo camera data. Finally, the validity and applicability of this algorithm is verified by selecting one group of data from different latitudes of the same orbit. The results show that this method could effectively correct the inconsistency of the spectral characteristics of the object caused by different geometrical observation conditions. Moreover, photometric correction shows better performance even at brighter or darker areas by this method.