Experimental study of contrast utilizing a vidicon.
Havel, Richard William
Crittenden, E.C. Jr.
MetadataShow full item record
A commercial multi-purpose closed circuit television camera system with a vidicon image tube was studied to determine its capability for measurement of contrast and visibility. A single line of the scan from the camera video output was extracted and examined with an oscilloscope. A derivation of system response was made and a comparison performed with laboratory data. Calibration of the field of view, for one particular television pick-up tube, revealed nonuniformities making resolution of 2 percent contrast difficult. Useful resolution results are expected with improvement of the pick-up tube or with employment of digital processing techniques.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Moretz, David Gavin (Monterey, California. Naval Postgraduate School, 1994-12);Computer analysis with IDL was performed on polarized infrared image data obtained during the MAPTIP coastal experiment. Analysis of contrast enhancement of the oceanographic ship Hr. Ms. Tydeman and a Lynx helicopter using ...
Platnick, S.; Durkee, P.A.; Nielsen, K.; Taylor, J.P.; Tsay, S.-C.; King, M.D.; Ferek, R.J.; Hobbs, P.V.; Rottman, J.W. (2000-08-15);The authors investigate the extent to which the contrast brightness of ship tracks, that is, the relative change in observed solar reflectance, in visible and near-infrared imagery can be explained by the microphysics of ...
Teo, Chek Koon (Monterey, California. Naval Postgraduate School, 2003-12);Low image contrast limits the amount of information conveyed to the user. With the proliferation of digital imagery and computer interface between man-and-machine, it is now viable to consider digitally enhancing the image ...