Modularly expansible system for real time processing of a TV display, useful in particular for the acquisition of coordinates of known shape objects

Claim 1

A television image real-time processing system for in-line acquisition of the coordinates of a plurality of moving objects of predetermined shape, said system comprising in combination and operatively interconnected circuit-wise: (a) television camera means adapted for scanning a field wherein at least one said object whose coordinates are to be acquired is present; (b) means for sampling the image recorded by said television camera means; (c) clock generator means adapted to synchronize operation of said television camera means, to generate timing for the system and to generate coordinate signals defining selected portion of the television image; (d) analog-to-digital converter means adapted to sequentially convert information from a selected shifting portion of the sampled image into a digital signal, said shifting portion being selected in response to said coordinate signals from said clock generator means and comprising the intersection of a predetermined small number of columns with a predetermined small number of rows of the raster of the television image; (e) settable reference generating means to generate a digital reference weighing signal representative of a said object; (f) correlation means connected to said converter and to said reference generating means to receive and correlate the digital signal from the converter and the digital reference weighing signal from the reference generating means and to supply a correlation signal whose magnitude is indicative of the degree of said correlation; (g) detector means connected to said correlation means to receive said correlation signal and to detect whether the magnitude of the correlation signal exceeds a preset threshold value thereby to indicate that the presently selected said portion of the sampled image likely represents the present coordinates of a said object in said field; and (h) minicomputer means connected to said detector for further processing said correlation signals to effect said indication of said coordinates, wherein said correlation means comprises a plurality of cascade connected stages, said stages including: a first stage comprising row delay lines equal in number to said predetermined small number of rows; a second stage comprising column delay lines equal in number to said predetermined small number of columns; a third stage comprising pre-adders; a fourth stage comprising multipliers connected to receive also said digital reference weighing signals from said reference generating means; and a fifth stage comprising a totalizing adder stage to provide said correlation signal.