Matching solid state camera with frame grabber: a must for accurate gauging

Peter Cencik

doi:10.1117/12.57973

1 March 1992 Matching solid state camera with frame grabber: a must for accurate gauging

Peter Cencik

Proceedings Volume 1614, Optics, Illumination, and Image Sensing for Machine Vision VI; (1992) https://doi.org/10.1117/12.57973
Event: Robotics '91, 1991, Boston, MA, United States

Abstract

It is important to select the right solid state camera in every machine vision application. The solid state camera technical specifications, such as spectral response, signal to noise ratio, dynamic range, sensitivity, sensor type and size, horizontal, and vertical resolution are the leading criteria for sensor selection. In general, it is expected that a camera with better specifications will improve gaging accuracy of a vision system. Yet, many times the result does not meet the expectation. In some cases the system performance even decreases. The reason is that the analog output voltage from the camera is sampled asynchronously by the common industrial machine vision systems and it can resolve in worse edge deformation and mislocation for the camera with higher resolution, and better signal to noise ratio than for the camera of lower performance. In this paper, we examine this effect with particular emphasis on edge detection performance. Video sampling timing charts and achieved subpixel accuracy and repeatability, when using several common solid state cameras with the same frame grabber, are presented. The guidelines for selecting a solid state camera according to the frame grabber are provided.

Citation Download Citation

Peter Cencik "Matching solid state camera with frame grabber: a must for accurate gauging", Proc. SPIE 1614, Optics, Illumination, and Image Sensing for Machine Vision VI, (1 March 1992); https://doi.org/10.1117/12.57973

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