Design and development of contrast-limited adaptive histogram equalization technique for enhancing pet images by improving joint entropy, UIQI parameters in comparison with median filtering.
In: AIP Conference Proceedings, Jg. 2816 (2024-03-22), Heft 1, S. 1-10
Online
Konferenz
Zugriff:
Aim:Image enhancement is the process of improving image quality to a more understandable level for future automated image processing tasks such as analysis, identification, segmentation, and recognition. In order to enhance the quality of PET images histogram based image enhancement technique is developed in this work. Materials and Methods: In this research, a contrast limited adaptive histogram equalization (CLAHE) based image enhancement technique is proposed and developed for PET images and the proposed work is compared with another image enhancement technique called median filtering method. Input medical images (N=30) of both groups were downloaded from standard medical databases. The enrollment ratio is obtained as 1 with 95% confidence interval and a threshold value 0.05 Results: The performance of image enhancement is measured using two parameters namely Joint Entropy(JE) and universal image quality index(UIQI). These parameters are calculated and evaluated to assess the proposed methods efficacy. High values of JOINT ENTROPY and UIQI indicate better enhancement. Contrast limited adaptive histogram equalization (CLAHE) provides mean JE values of 12.3410, mean UIQI of 77.3150% and median filtering method provides mean JE values of 9.7240 and mean UIQI of 71.7617%. Conclusion: Based on the experiments results from MATLAB software and from independent sample T test results of IBM-SPSS software, the innovative contrast limited adaptive histogram equalization(CLAHE) based image enhancement technique significantly performed better than the median filtering(MF) based image enhancement technique with JE(P=(<0.001) and UIQI(P=0.184). [ABSTRACT FROM AUTHOR]
Titel: |
Design and development of contrast-limited adaptive histogram equalization technique for enhancing pet images by improving joint entropy, UIQI parameters in comparison with median filtering.
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Autor/in / Beteiligte Person: | Vinoothna, Boppudi ; Rajendiran, Nanmaran |
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Zeitschrift: | AIP Conference Proceedings, Jg. 2816 (2024-03-22), Heft 1, S. 1-10 |
Quelle: | 2024, Vol. 2816 Issue 1, p1-10. 10p.; Jg. 2816 (2024-03-22) 1, S. 1-10 |
Veröffentlichung: | 2024 |
Medientyp: | Konferenz |
ISSN: | 0094-243X (print) |
DOI: | 10.1063/5.0185942 |
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