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Mineralogical Magazine GSW 2008 Users' Group Meeting
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Mineralogical Magazine; April 2004; v. 68; no. 2; p. 323-333; DOI: 10.1180/0026461046820189
© Mineralogical Society of Great Britain and Ireland
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FIG. 7. The calibration procedure for digital imaging aims to equalize the grey-level values of pixels corresponding to the same mineral species wherever they are located in the field of view. A line drawn through the image of a single crystal illustrates how the original values are distributed (a). The use of a time averaging of successive frames drastically reduces the punctual noise (b). The additional correction for uneven illumination and uneven pixel response leads to an almost constant rendering of the uniform mineral surface (c).





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JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2008 by Mineralogical Society of Great Britain and Ireland