TODENTJ-25-03-2019_TODENTJ-9-292
1553505870
Bentham Open
doi@benthamopen.net
Bentham Open
The Open Dentistry Journal
TODENTJ
1874-2106
7
31
2015
9
1
Evaluation of a Mathematical Model for Digital Image Enhancement
Hassem
Geha
Ibrahim
Nasseh
Marcel
Noujeim
Objective : The purpose of this study is to compare the detected number of holes on a stepwedge on images resulting from the application of the 5th degree polynomial model compared to the images resulting from the application of linear enhancement. Material and Methods : A 10-step aluminum step wedge with holes randomly drilled on each step was exposed with three different kVp and five exposure times per kVp on a Schick33® sensor. The images were enhanced by brightness/contrast adjustment, histogram equalization and with the 5th degree polynomial model and compared to the original non-enhanced images by six observers in two separate readings. Results : There was no significant difference between the readers and between the first and second reading. There was a significant three-factor interaction among Method, Exposure time, and kVp in detecting holes. The overall pattern was: “Poly” results in the highest counts, “Original” in the lowest counts, with “B/C” and “Equalized” intermediate. Conclusion : The 5th degree polynomial model showed more holes when compared to the other modalities.
7
31
2015
292
296
TODENTJ-9-292
1
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Peer Reviewed
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2014-12-30
2015-3-11
2015-5-25
2015-7-31
http://creativecommons.org/licenses/by-nc/3.0/
10.2174/1874210601509010292
1553505870
https://opendentistryjournal.com/VOLUME/9/PAGE/292/
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