Detection Algorithm of Dim and Small Infrared Target Based on Temporal chi² Test

The detection for motive small target in infrared image sequence has become a hot topic nowadays. A novel detect algorithm of dim and small infrared target 9 based on temporal chi² test, which aims at disadvantages of algorithm complexity, large amounts of data to process, high capacity memory demand in concerned algorithm, is proposed. Theory basis of 9 temporal chi² test is described in detail and recursive formula of concerned statistics is given and detection performance of the algorithm is analyzed. The algorithm is very easy to realize because the whole algorithm need buffer one frame image only. The results of theoretical analysis and experiments show that the algorithm can detect targets which SNR is no less than 2 and move speeding image is no less than 0.5 pixel per frame.