14 December 1998 Design and performance of a metrology camera with 6- and 28-million pixel CCD sensors
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Abstract
Digital Close-Range Photogrammetry has made tremendous improvements over the last years. Many of the elements contributing to those improvements were the advances in algorithms and their implementation into commercial systems. It has become customary that production personnel without photogrammetric know-how use systems. Another area of major change is the use of Digital Close-Range Photogrammetry systems in machine control. These applications require totally automated systems without human supervision. While the algorithmic performance of such systems is a difficult task other issues, such as ultra high-resolution cameras suitable for the rough environment and their response time, are critical elements for the acceptance of such systems. Cameras with much higher resolutions and better performance have been appearing on the market over the last years. There are Cameras with CCD-sensors containing 4kx4k pixels are available. While these cameras offer a larger sensor their performance is not dramatically better than that of the widely used cameras using 3kx2k sensors. Actually the price/performance of these cameras is poorer. A new camera series offering both 3kx2k and 7kx4k sensors with a custom optics and a high-performance CCD-sensor read-out was designed to break current accuracy barriers. Innovations included in these cameras include custom optics. This allows the optics to be tuned to the application and not just general photography needs. They take advantage of the full dynamic range offered by the CCD-sensor, i.e. use of a 12 bit analog-to-digital converter and 16 bit per pixel in order to take full advantage of the CCD-sensor. They have an optical/mechanical design to assure an extreme geometric stability of the camera. Finally they include an 'on-board' processor to perform all image computations within the camera.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Horst A. Beyer, Horst A. Beyer, } "Design and performance of a metrology camera with 6- and 28-million pixel CCD sensors", Proc. SPIE 3641, Videometrics VI, (14 December 1998); doi: 10.1117/12.333783; https://doi.org/10.1117/12.333783
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