The significant change for the last few years is the increase in resolution, and decrease in required illumination level for video image recordings. Such developments provided the basis for this research. The results indicate that the video recordings are suitable for inspection of portions of structures. Particularly those which are hardly accessible, are in deep shadows or under water. Using f=16-160mm zoom optics the recording distance is 5-150 ft. and 3-6 ft. under water. The resolution of the system is satisfactory. It is possible to form images in nearly complete darkness (night time). Therefore, structural parts in deep shadows can be inspected. It recommended that video recording augment the visual inspections after certain modifications.
August 24, 2007
S.A. Veress, Yeongji Kim, Shiahn-Wern Shyue.
Washington State Transportation Center (TRAC)
- # of Pages: 92 p., 2,009 KB (PDF)
- Subject: Data collection, Flaw detection, Inspection equipment, Lighting, Photogrammetry, Structural deterioration and defects, Turbidity, Video cameras.
- Keywords: Resolution, video recording, turbidity, illumination, IR filter, UV filter, photogrammetry.
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This abstract was last modified April 29, 2008