Interactive Enhancement Of Tone Scale

Donald E. Troxel; William F. Schreiber; Nancy J. Burzinski; Mark D. Matson

doi:10.1117/12.7972992

1 October 1982 Interactive Enhancement Of Tone Scale

Donald E. Troxel, William F. Schreiber, Nancy J. Burzinski, Mark D. Matson

Author Affiliations +

Optical Engineering, Vol. 21, Issue 5, 215841 (October 1982). https://doi.org/10.1117/12.7972992

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 that 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 that are labeled 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.

Citation Download Citation

Donald E. Troxel, William F. Schreiber, Nancy J. Burzinski, and Mark D. Matson "Interactive Enhancement Of Tone Scale," Optical Engineering 21(5), 215841 (1 October 1982). https://doi.org/10.1117/12.7972992

Published: 1 October 1982

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available