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A three-camera multispectral digital video imaging system

Permanent URL:
http://handle.nal.usda.gov/10113/37660
File:
Download [PDF File]
Abstract:
This article describes a multispectral digital video imaging system for remote sensing research. The system is comprised of three charge coupled device (CCD) analog video cameras, a computer equipped with an image digitizing board, a color encoder, and super (S)-VHS portable recorder. The cameras are visible/near-infrared (NIR) (0.4-1.1 micrometer) light sensitive. Two of the cameras are equipped with visible yellow-green (YG, 0.555-0.565 micrometer) and red (R, 0.625-0.635 micrometer) filters, respectively, while the third camera has a NIR (0.845-0.857 micrometer) filter. The computer is a 486-DX50 system that has an RGB image grabbing board (640 x 480 pixel resolution). The NIR, R, and YG image signals from the cameras are subjected to RGB inputs of the computer digitizing board, thus giving a color-infrared (CIR) composite digital image similar in color tonal rendition to that of CIR film. The hard disk can store 1000 CIR composite images. In addition, the cameras' signals are also subjected to a color encoder that provides an analog CIR composite which is stored on the S-VHS recorder. The analog CIR imagery recording serves as a back-up in the event the computer malfunctions. A global positioning system (GPS) is also integrated with the imagery. The system provides high quality digital video imagery that is superior in resolution to analog video imagery. Image examples are given demonstrating its application to natural resource assessment.
Author(s):
Everitt, J.H. , Escobar, D.E. , Cavazos, I. , Noriega, J.R. , Davis, M.R.
Note:
Includes references
Source:
Remote sensing of environment Dec 1995. v. 54 (3)
Language:
English
Year:
1995
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.