We should carry out processing techniques to correct the error. It willeliminate or correct image
distortion caused by the errors of radiation. Using internal calibration source and calibration wedge, such
as radiometric calibration of the Landsat multispectral scanner,which can calibrate the sensors radiation.In
addition the correction of atmospheric effects can also be reflected by the measured radiation flux and the
image density, and regression analysis of the data to be corrected.