Research on Radiometric Correction Method of High Resolution Satellite Image

摘要

Because of the influence of atmosphere, the characteristics of the sensor and the image recording system, the quality of on-orbit obtained satellite images maybe get lower. The radiation distortion is caused by various factors, such as the blurring of the imaging system, non-linear amplitude response, vignetting and shadows, transmission noise, atmospheric interference, the changes of surface exposure and the radiance changes with the angle. According to the actual characteristics of high-resolution satellite images, we presented a radiation correction method which solved the image distortion problem. The radiation correction can provide a good basis for the image geometric correction, image fusion, etc. By the actual obtaining data of satellite on-orbit experiments, this program solves the problems of chrominance, mosaics, correction, drop-out lines, and noise existed in the images which are obtained by the raw data after decryption and decompression. The radiation correction can provide a good basis for the image mapping process, image fusion, etc.