Accession Number:

ADA012791

Title:

Image Enhancement by Chemical Intensification.

Descriptive Note:

Technical rept. Mar-Dec 74,

Corporate Author:

ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

Personal Author(s):

Report Date:

1975-05-01

Pagination or Media Count:

19.0

Abstract:

This report covers the use and evaluation of a quinone-thiosulfate chemical intensifier to improve image characteristics in photographic negatives of low density and contrast. The report concludes that 1 Apparent emulsion speeds of aerial films can be increased by a factor of as high as two with quinone-thiosulfate intensification as a post-processing treatment. 2 Quinone-thiosulfate intensification may improve the resolution of low density negative imagery, but not that of normal negatives. 3 as both a contrast and emulsion speed enhancing process, quinone-thiosulfate may greatly improve the usefulness of imagery to be used with image data-extraction devices. 4 The opportunity is presented, through intensification to save unique images with inadequate contrast and density, and to tailor densities and contrasts to fill a variety of human and machine needs. 5 Further, more definitive work is required to define the exact methods and criteria for applying this intensification method to actual problems requiring improved contrast andor resolution. Author

Subject Categories:

  • Cartography and Aerial Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE