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Proceedings Paper

Information capacity: a measure of potential image quality of a digital camera
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Paper Abstract

The aim of the paper is to define an objective measurement for evaluating the performance of a digital camera. The challenge is to mix different flaws involving geometry (as distortion or lateral chromatic aberrations), light (as luminance and color shading), or statistical phenomena (as noise). We introduce the concept of information capacity that accounts for all the main defects than can be observed in digital images, and that can be due either to the optics or to the sensor. The information capacity describes the potential of the camera to produce good images. In particular, digital processing can correct some flaws (like distortion). Our definition of information takes possible correction into account and the fact that processing can neither retrieve lost information nor create some. This paper extends some of our previous work where the information capacity was only defined for RAW sensors. The concept is extended for cameras with optical defects as distortion, lateral and longitudinal chromatic aberration or lens shading.

Paper Details

Date Published: 18 January 2010
PDF: 10 pages
Proc. SPIE 7537, Digital Photography VI, 75370F (18 January 2010); doi: 10.1117/12.838903
Show Author Affiliations
Frédéric Cao, DxO Labs. (France)
Frédéric Guichard, DxO Labs. (France)
Hervé Hornung, DxO Labs. (France)

Published in SPIE Proceedings Vol. 7537:
Digital Photography VI
Francisco Imai; Nitin Sampat; Feng Xiao, Editor(s)

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