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pro vyhledávání: '"Walter L. Snow"'
Autor:
Mark R. Shortis, Walter L. Snow
Publikováno v:
The Photogrammetric Record. 15:673-689
Les ingenieurs travaillant avec des souffleries, ont besoin de determiner la localisation et l'orientation des modeles aerospatiaux dans les conditions memes de l'experience. Il faut que le procede de mesure soit sans contact, non perturbateur et fou
Autor:
Mark R. Shortis, Walter L. Snow
Publikováno v:
Digital Photogrammetry and Remote Sensing '95.
Small format, medium resolution CCD cameras are at present widely used for industrial metrology applications because they are readily available and relatively inexpensive. The calibration of CCD cameras is necessary in order to characterize the geome
Autor:
Walter L. Snow, Mark R. Shortis
Publikováno v:
SPIE Proceedings.
Photogrammetry affords the only noncontact means of providing unambiguous six-degree-of- freedom estimates for rigid body motion analysis. Video technology enables convenient off- the-shelf capability for obtaining and storing image data at frame (30
Publikováno v:
SPIE Proceedings.
Developers of videometric systems must attend to the problems of image storage, retrieval and, for multi-station triangulation, the unambiguous correlation of images with appropriate epochs. For dynamic testing with multiple cameras, this problem is
Autor:
Brooks A. Childers, Walter L. Snow
Publikováno v:
SPIE Proceedings.
Time exposure photography, sometimes coupled with strobe illumination, is an accepted method for motion analysis that bypasses frame by frame analysis and resynthesis of data. Garden variety video cameras can now exploit this technique using a unique
Publikováno v:
SPIE Proceedings.
A clear advantage of digital photogrammetric measurement over other, more conventional techniques in the fast sample rate of the data acquisition. CCD cameras and video systems can be used very effectively to analyze dynamic objects or cases of rapid
Publikováno v:
SPIE Proceedings.
A model space positioning system (MSPS), a state-of-the-art, real-time tracking system to provide the test engineer with on line model pitch and spin rate information, is described. It is noted that the six-degree-of-freedom post processor program wi
Publikováno v:
Close-Range Photogrammetry Meets Machine Vision.
Some techniques for laboratory calibration and characterization of video cameras used with frame grabber boards are presented. A laser-illuminated displaced reticle technique (with camera lens removed) is used to determine the camera/grabber effectiv
Autor:
Walter L. Snow, William L. Wells
Publikováno v:
The Journal of Chemical Physics. 73:2547-2551
The opacity of linear triatomic carbon (C3) was measured in a graphite tube furnace from 280 to 600 nm to supplement the earlier measurement of Brewer and Engelke. Data are presented for a maximum centerline temperature range of 2720–3060 K.
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