Integrated machine vision technology for line-scan applications

Risto Mitikka, Markku Pietikäinen, Jouko Vilmi, Heikki Ailisto

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    2 Citations (Scopus)

    Abstract

    There is clear need for integrated and affordable machine vision systems in line-scan applications, e.g. for width measurement and defect detection. These applications require sensor-like solutions in a price range not achievable with traditional machine vision systems consisting of a line-scan camera, host computer, frame grabber and possibly one or more dedicated processing boards. Since an integrated solution would make a separate host computer and associated boards unnecessary, we set out to study the feasibility of integrated machine vision technology for such applications. Analyses of several potential applications were used to define the requirements for an integrated line-scan camera-based vision system. In order to demonstrate the feasibility of the concept, a research prototype was designed based on these requirements. This is a complete machine vision system with camera front end, fast hardware for corrections, the necessary logic and a computer for higher-level data analysis and I/O. A 4096-pixel CCD array followed by 20 MHz 10 A/D conversion forms the front end. Illumination correction, geometric correction, 7×7 convolution, multilevel pixelwise thresholding and histogramming are all implemented with fast Erasable Programmable Logic Device (EPLD) circuits. A compact PC/104 with a 486 processor takes care of the high-level processing and control. Communication facilities include 12 TTL-level I/O lines, a serial line and a video output.

    Original languageEnglish
    Title of host publicationMachine Vision Applications, Architectures, and Systems Integration VI
    PublisherInternational Society for Optics and Photonics SPIE
    Pages108-116
    Number of pages9
    DOIs
    Publication statusPublished - 1 Dec 1997
    MoE publication typeA4 Article in a conference publication
    EventMachine Vision Applications, Architectures, and Systems Integration VI - Pittsburgh, PA, United States
    Duration: 15 Oct 199715 Oct 1997

    Publication series

    SeriesProceedings of SPIE
    Number3205
    ISSN0277-786X

    Conference

    ConferenceMachine Vision Applications, Architectures, and Systems Integration VI
    CountryUnited States
    CityPittsburgh, PA
    Period15/10/9715/10/97

    Keywords

    • Intelligent camera
    • Sensor-like machine vision
    • Smart camera

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