Limits...
A New GLLD Operator for Mass Detection in Digital Mammograms.

Gargouri N, Dammak Masmoudi A, Sellami Masmoudi D, Abid R - Int J Biomed Imaging (2012)

Bottom Line: We have used 1000 regions of interest (ROIs) obtained from the Digital Database for Screening Mammography (DDSM).The area under the curve of the corresponding approach has been found to be A(z) = 0.95 for the mass detection step.A comparative study with previous approaches proves that our approach offers the best performances.

View Article: PubMed Central - PubMed

Affiliation: Computer Imaging and Electronic System Group, CEM Laboratory, Department of Electrical Engineering, Sfax Engineering School, University of Sfax, P.O. Box 1169, 3038 Sfax, Tunisia.

ABSTRACT
During the last decade, several works have dealt with computer automatic diagnosis (CAD) of masses in digital mammograms. Generally, the main difficulty remains the detection of masses. This work proposes an efficient methodology for mass detection based on a new local feature extraction. Local binary pattern (LBP) operator and its variants proposed by Ojala are a powerful tool for textures classification. However, it has been proved that such operators are not able to model at their own texture masses. We propose in this paper a new local pattern model named gray level and local difference (GLLD) where we take into consideration absolute gray level values as well as local difference as local binary features. Artificial neural networks (ANNs), support vector machine (SVM), and k-nearest neighbors (kNNs) are, then, used for classifying masses from nonmasses, illustrating better performance of ANN classifier. We have used 1000 regions of interest (ROIs) obtained from the Digital Database for Screening Mammography (DDSM). The area under the curve of the corresponding approach has been found to be A(z) = 0.95 for the mass detection step. A comparative study with previous approaches proves that our approach offers the best performances.

No MeSH data available.


Related in: MedlinePlus

ROC curve corresponding to a subset of 1000 ROIs images from the DDSM database.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3539378&req=5

fig10: ROC curve corresponding to a subset of 1000 ROIs images from the DDSM database.

Mentions: As illustrated in Figure 10 and Table 6 the CAD system achieves better performance (Az = 0.93) when using the sign component than the modulus component. However, their fusion may provide much better results in texture classification than using either sign or modulus (Az = 0.95). The AUC of the GLLD24,3riu2 after the fusion of the three operators SGLLD24,3riu2, MGLLD24,3riu2, and CGLLD24,3riu2 using the ANN as classifier is about (Az = 0.95) for the experimental set.


A New GLLD Operator for Mass Detection in Digital Mammograms.

Gargouri N, Dammak Masmoudi A, Sellami Masmoudi D, Abid R - Int J Biomed Imaging (2012)

ROC curve corresponding to a subset of 1000 ROIs images from the DDSM database.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3539378&req=5

fig10: ROC curve corresponding to a subset of 1000 ROIs images from the DDSM database.
Mentions: As illustrated in Figure 10 and Table 6 the CAD system achieves better performance (Az = 0.93) when using the sign component than the modulus component. However, their fusion may provide much better results in texture classification than using either sign or modulus (Az = 0.95). The AUC of the GLLD24,3riu2 after the fusion of the three operators SGLLD24,3riu2, MGLLD24,3riu2, and CGLLD24,3riu2 using the ANN as classifier is about (Az = 0.95) for the experimental set.

Bottom Line: We have used 1000 regions of interest (ROIs) obtained from the Digital Database for Screening Mammography (DDSM).The area under the curve of the corresponding approach has been found to be A(z) = 0.95 for the mass detection step.A comparative study with previous approaches proves that our approach offers the best performances.

View Article: PubMed Central - PubMed

Affiliation: Computer Imaging and Electronic System Group, CEM Laboratory, Department of Electrical Engineering, Sfax Engineering School, University of Sfax, P.O. Box 1169, 3038 Sfax, Tunisia.

ABSTRACT
During the last decade, several works have dealt with computer automatic diagnosis (CAD) of masses in digital mammograms. Generally, the main difficulty remains the detection of masses. This work proposes an efficient methodology for mass detection based on a new local feature extraction. Local binary pattern (LBP) operator and its variants proposed by Ojala are a powerful tool for textures classification. However, it has been proved that such operators are not able to model at their own texture masses. We propose in this paper a new local pattern model named gray level and local difference (GLLD) where we take into consideration absolute gray level values as well as local difference as local binary features. Artificial neural networks (ANNs), support vector machine (SVM), and k-nearest neighbors (kNNs) are, then, used for classifying masses from nonmasses, illustrating better performance of ANN classifier. We have used 1000 regions of interest (ROIs) obtained from the Digital Database for Screening Mammography (DDSM). The area under the curve of the corresponding approach has been found to be A(z) = 0.95 for the mass detection step. A comparative study with previous approaches proves that our approach offers the best performances.

No MeSH data available.


Related in: MedlinePlus