subjective brightness

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That attribute of visual perception in accordance with which a surface appears to emit more light or less light. Now called luminance.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
To supplement the test participants' subjective brightness ratings, the research team obtained separate subjective brightness rankings for one quadrant of the yellow and red colors of the five materials.