A Method of Correcting Brightness Gradient in Thermal Infrared Image

摘要: On January 2, 2014, had the thermal infrared remote sensing image (TASI) near drain of Chang Jiang nuclear power station in Hainan Province plant. Due to effect external factors, such as sun azimuth, data within a single band appeared brightness gradient phenomenon. It was not conducive seawater temperature retrieval. Through research and analysis, established model for seawater. Based on quadratic polynomial fitting method, simulated law each kind water after threshold classification, then used compensation correction factors correct original image, obtained good application effect.