Optical Hough transform
William H. Steier, Raj K. Shori · Applied Optics · 1986
An optical technique is presented for achieving the Hough transform at video rates. Both coherent and incoherent approaches are discussed and analyzed. An incoherent system which combines edge enhancement with the Hough transform is also considered. Use of the optical Hough transform for the location of the bridges and roadways in outdoor scenes and for the locations of parts, as used in automated manufacturing, is demonstrated.