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ARS Home » Research » Publications at this Location » Publication #77971
Title: A VIDEO SYSTEM THAT SIMULATES LANDSAT TM 5, 4, 3 IMAGERY

Author
item Everitt, James
item Escobar, David
item Noriega, Juan
item Cavazos Iii, Isabel
item Davis, Michael

Submitted to: Remote Sensing of Environment
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/7/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: Within the past few years, interest in the application of videography as a remote sensing tool has greatly increased. Advancements in videographic and computer technology during this period has helped to stimulate the interest in video remote sensing. A digital video imaging system has been developed that simulates Thematic Mapper (TM) 5, 4, 3 satellite imagery. The system is comprised of two visible/near-infrared (NIR) cameras, a mid-infrared (MIR) camera, and a computer equipped with an image digitizing board. The two visible/NIR cameras are equipped with visible red (0.625 -0.635 um) and NIR (0.845 - 0.857 um) filters, respectively. The MIR sensitive camera was equipped with a narrowband MIR (1.621 - 1.676 um) filter. The computer is a Bi-Link Pentium 90 MHz with an RGB image grabbing board. The MIR, NIR, and red image signals from the cameras are subjected to RGB inputs of the computer digitizing board, thus giving a false color composite digital image similar to TM 5, 4, 3 satellite imagery. Imagery provided by this system should be especially useful for assisting in the interpretation of the coarser resolution 5, 4, 3 TM satellite imagery.

Technical Abstract: This paper describes a multispectral digital video imaging system that simulates Thematic Mapper (TM) 5, 4, 3 satellite imagery. The system is comprised of two charge coupled device (CCD) analog video cameras, one tube analog video camera and a computer equipped with an image digitizing board. The two CCD cameras are visible/near-infrared (NIR) light sensitive and were equipped with visible red (0.625 - 0.635 um) and NIR (0.845 -0.857 um narrowband filters, respectively. The third camera is visible/NIR/MIR (0.40 - 2.20 um) light sensitive and was equipped with a MIR (1.631 - 1.676 um) narrowband filter. The computer is a Bi-Link pentium 90 MHz system that has an RGB image grabbing board 640 x 480 pixel resolution. The MIR, NIR, and red image signals from the cameras are subjected to RGB inputs of the computer digitizing board, thus giving a false color composite digital image similar in color rendition to TM 5, 4, 3 satellite imagery. The computer hard disk can store 1000 false color composite images. Image results showed this system to be a valuable and versatile tool for a variety of remote sensing applications.