ANALOG IMPLEMENTATION OF THE HOUGH TRANSFORM

In digital implementations of the Hough transform, either digital multiplication or table lookup are used in the calculations. Equivalent results may be obtained using an analogue representation. Each edge point in the image is used to generate a signal representing the continuous form of the Hough transform for that point. The signal is either stored in its analogue form in an analogue memory, or it is sampled at regular intervals to provide a discrete sequence of values, which are stored in a digital memory. It has been shown that such an analogue implementation achieves a significantly better throughout than that of an equivalent digital implementation. The designed circuit may be integrated as a one-chip hybrid integrated circuit.