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Proceedings Paper

Interactive Enhancement Of Tone Scale
Author(s): Donald E. Troxel; William F. Schreiber; Nancy J. Burzinski; Mark D. Matson
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Paper Abstract

The tone scale or gradation of a continuous tone picture is the most important factor related to the quality of an image. We have developed special purpose analog and digital circuitry which enables the real-time (30 updates per second) computation of a tone scale transformation which is then applied to a digitized picture being displayed on a television monitor. In our system the tone scale transformations are controlled by knobs which are labelled in terms meaningful to photographic artisans, rather than requiring an operator to specify points on a transfer characteristic as is common with other systems. These knobs directly specify minimum and maximum densities, brightness, and shadow, highlight and overall contrast. These control parameters may be selectively enabled by the operator. After the appropriate aesthetic modifications have been achieved on the television display, the operator may initiate the transformation of the complete stored image prior to subsequent computer processing or hard copy output.

Paper Details

Date Published: 23 July 1982
PDF: 7 pages
Proc. SPIE 0301, Design of Digital Image Processing Systems, (23 July 1982); doi: 10.1117/12.932618
Show Author Affiliations
Donald E. Troxel, Massachusetts Institute of Technology (United States)
William F. Schreiber, Massachusetts Institute of Technology (United States)
Nancy J. Burzinski, Massachusetts Institute of Technology (United States)
Mark D. Matson, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0301:
Design of Digital Image Processing Systems
James L. Mannos, Editor(s)

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