A fine image motion compensation method for the panoramic TDI CCD camera in remote sensing applications

The image motion caused by camera housing rotation is the natural component in panoramic TDI CCD camera, and it cannot be eliminated thoroughly by traditional motion compensation schemes. After researching on the operation of a typical panoramic TDI CCD imaging system, we present a fine rolling rate independent motion compensation method. Employing the correction factor k, a TDI CCD line transfer synchronization signal is generated by the high resolution optical encoder as long as the ground scene moves one pixel with respect to the detector. Then, the effect of the motion compensation method is evaluated using the Monte Carlo method. The simulation results indicate that the magnitude of the modulation transfer function at the Nyquist frequency increases more than three times by increasing the subdivision steps from 100 to 500, and also of the imaging experimental results show that the image quality improvement can be achieved.