Blind and flash pixels detection and compensation algorithm for infrared detector based on image sequence

The blind pixels and the flash pixels of infrared detector, which are easily to be detected as the target, increase the false alarm rate. An algorithm about the detection of blind pixel and flash pixel is proposed in this paper. This method is based on the characteristics that the gray values of the blind pixels in the sequence images are basically unchanged, there is a jump in the gray values of the flash pixels, and there are obvious differences between blind pixels and neighboring pixels in spatial domain, the method of joint processing in space-time domain is used to detect blind pixels. Compared with the traditional algorithm, this method effectively avoids the problem of target signal suppression in blind flash pixel detection. The experiment of a 0.3m telescope shows that this algorithm can effectively eliminate blind flash pixels in infrared images. In the experiment of dim target detection, combined with multi-frame energy accumulation algorithm, this algorithm has the ability to detect targets with signal to noise ratio (SNR) <= 1 and the brightness of 10.8mV is detected, which lays a technical foundation for the follow-up ground-based optical telescope to carry out full-time detection.