1. Visual pattern recognition by moment invariant;Hu;IRE Trans. Inf. Theory IT-8,1962
2. Shape discrimination using Fourier descriptor;Persoon;IEEE Trans. SMC-7,1977
3. Generalizing the Hough transform to detect arbitrary shapes;Ballard;Pattern Recognition,1981
4. Recognizing partially occluded parts;Turney;IEEE Trans. Pattern Analysis Mach. Intell. PAMI-7,1985
5. A computer vision system for partially occluded object recognition;Tsang;ISSPA 90, Signal Processing, Theories, Implementations and Application, Gold Coast, Australia,1990