BEASF-Based Image Enhancement for Caries Detection Using Multidimensional Projection and Neural Network

BEASF-Based Image Enhancement for Caries Detection Using Multidimensional Projection and Neural Network

Shashikant Patil (EXTC Department, MPSTME, Mumbai, India), Vaishali Kulkarni (MPSTME, SVKMs NMIMS Mumbai, India) and Archana Bhise (MPSTME, SVKMs NMIMS Mumbai, India)
Copyright: © 2018 |Pages: 20
DOI: 10.4018/IJALR.2018070103

Abstract

Tooth caries or cavities diagnosing are concerned as the most significant research work, as this is the common oral disease suffered by humans. Many approaches have been proposed under the topics including demineralization and decaying as well. However, the imaging modalities often suffer from various critical or complex aspects that struggles the methods to attain accurate diagnosis. This article turns to introduce a new cavity diagnosis model with three phases: (i) pre-processing (ii) feature extraction (iii) classification. In the first phase, a new bi-histogram equalization with adaptive sigmoid functions (BEASF) is introduced to enhance the image quality followed by other enhancements models like grey thresholding and active contour. Then, the features are extracted using multilinear principal component analysis (MPCA). Further, the classification is done via neural network (NN) classifier. After the implementation, the proposed model compares its performance over other conventional methods like principal component analysis (PCA), linear discriminant analysis (LDA) and independent component analysis (ICA) and the performance of the approach is analyzed in terms of measures such as accuracy, sensitivity, specificity, precision, false positive rate (FPR), false negative rate (FNR), negative predictive value (NPV), false discovery rate (FDR), F1Score and Mathews correlation coefficient (MCC), and proves the superiority of proposed work.
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2. Literature Review

In 2010, Zakian et al. (2010) have utilized the total of 72 sites on 25 teeth (human) with different natural demineralisation degrees. Subsequently, Continuous water evaporation inside the pores was utilized for producing a thermodynamic response on the surface of tooth. The temperature’s temporal profile would depend on the water amount at every position, which was studied in the relation to the porosity degree and the severity of lesion as well. the authors have used DQ for the lesion quantification. Finally, the proposed thermal imaging has shown the capability of discriminating.

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