Maskable bilevel correlators
August 8, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3597083 Digital video correlator Magnetoresistive image correlation device Image display unit capable of tone reproduction Modularly expansible system for real time processing of a TV display, useful in particular for the acquisition of coordinates of known shape objects Real time pipelined system for forming the sum of products in the processing of video data Image correlation system Image processing apparatus Patent #: 4866534 Inventors
ApplicationNo. 229407 filed on 08/08/1988US Classes:382/209, Template matching (e.g., specific devices that determine the best match)382/278, Correlation708/422, Correlation708/813Correlation or convolutionExaminersPrimary: Moore, David K.Assistant: Mancuso, Joseph Attorney, Agent or FirmForeign Patent References
International ClassG06K 009/64AbstractA method and apparatus for correlating two signals representing a live image and a reference image are disclosed. The reference signal is processed to provide a polarity bit and mask bit for each pixel position in the reference image. The processed video signal is stored in a memory 20 and used in a convolver and summer section 18 in which the polarity bits between the reference and live images are gated by gate 17 and are used in generating a correlation output from summer 23. However, the polarity bits do not affect the correlation output if the logical output from gate 19 is of a given state which occurs if the associated mask bits indicate that the gradient value at the particular pixel position does not exceed certain minimum threshold values. | |
