Chapter 4

Calibrated Measurement of Imager Dynamic Range

B. Karr*,,; K. Debattista*; A. Chalmers*    * University of Warwick, Coventry, United Kingdom Rockledge Design Group, Inc., Rockledge, FL, United States

Abstract

An evaluation of a no-reference objective quality metric to accurately measure and compare the increased dynamic range capability of modern image capture systems is presented. The use of commercial off-the-shelf equipment and software allows manufacturers and users to produce results that are both transparent and comparable. The no-reference metric is fundamentally based on the evaluation of noise, using a single frame of a 21 density step high dynamic range (HDR) test chart as an input to determine the ratio of the maximum unclipped ...

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