Real-Time Comparator Using A High Definition Linear Sensor

Marc Giordani; Raymond Pidoux

doi:10.1117/12.935326

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26 October 1983 Real-Time Comparator Using A High Definition Linear Sensor

Marc Giordani, Raymond Pidoux

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Proceedings Volume 0397, Applications of Digital Image Processing V; (1983) https://doi.org/10.1117/12.935326
Event: 1983 International Technical Conference/Europe, 1983, Geneva, Switzerland

Abstract

The paper describes a system achieving the comparison of high definition images (ty-pically 2000 x 2000 pixels) in real-time (i.e. without image storage) in a typical time of 1 second. The image comparator is composed of two devices: the "TRANSLATOR SYSTEM" and the "TEST STATION". The "TRANSLATOR SYSTEM" provides the means to develop a software "REFERENCE IMAGE" during a preliminary "off-line" phasis, using data obtained from CAD systems or from digitized drawings. The "TEST STATION" features the "COMPARATOR SYSTEM" and the "MEASURING HEAD". The first performs the real-time comparison of a "REAL IMAGE" (provided by a high definition linear solid-state sensor) and the corresponding "REFERENCE IMAGE". This unit is controlled by a microprocessor which feeds the hardware "pixel-comparators" with the necessary reference data. Simultaneously, the real image data obtained by scanning the scene are given pixel by pixel to those comparators. The error detection hardware of the "COMPARATOR SYSTEM" is programmable according to the criteria defining the reject conditions (density and/or patterns of erroneous pixels detected) imposed by the user. Registration errors within certain tolerances may occur without hampering the comparison process.

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Marc Giordani and Raymond Pidoux "Real-Time Comparator Using A High Definition Linear Sensor", Proc. SPIE 0397, Applications of Digital Image Processing V, (26 October 1983); https://doi.org/10.1117/12.935326

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