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| RAPID MINERAL QUANTITATIVE MEASUREMENT WITH SEM-IPS BY TARGETS AT GRAVITATION CENTERS OF OBJECT |
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| DOI： |
| KeyWord:Quantitative mineralogy Image analysis Pattern recognition Object-target at the center of gravity |
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| Hits: 1998 |
| Download times: 44 |
| Abstract: |
| In order to overcome the phase discrimination difficulty related to the quantitative measurement of minerals by image analysis, a SEM is often adopted instead of an optical microscope to obtain an X-ray signal which is much more efficient to distinguish variety of minerals than other analogue signals. Due to the statistical characteristic of X-ray counts, it takes too much time to form an X-ray image with enough size precision of objects. So a compromise between increasing the time and decreasing the precision of measurement has to be taken. The method described combines the imaging rapidity and size precision of backscatter electron signals with the effective discriminability of X-ray signals for the evaluation. It includes: (1) Segmenting the binary image of all mineral objects from embedding resin for area measurement; (2) Forming a 9-pixel target at the center of gravity on each object for exciting X-ray counts; (3) Classifying objects based on the pattern recognition of X-ray counts; (4) Accumulating mineral proportions. The measuring time for a frame is thus reduced from several minutes to several seconds. |
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