ICTACT Journal on Image and Video Processing

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Automatic ROI Extraction in Noisy Medical Images


Affiliations
1 Department of Computer Science and Engineering, Sri Siddhartha Institute of Technology, India
2 Department of Electronics and Communication Engineering, Siddaganga Institute of Technology, India
     

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Accurate segmentation of medical images is pivotal in medical image analysis as it favors the detection and quantification of abnormalities present in human anatomical structures. Since medical images are complex and sometimes noisy, effective extraction of the regions of abnormalities is a tedious process. Many semi-automatic segmentation algorithms with appreciable segmentation accuracy do exist in literature. However, these techniques are iterative, computationally expensive, involve human intervention demanding initial parameter settings and moreover, each one of them is specific to a particular modality. In addition, presence of noise further degrades the quality of the processed image. There is no general algorithm to extract the key regions from all types of noisy medical images. This paper proposes an automatic Region of Interest (ROI) extraction algorithm to detect the important regions in noisy medical images of different modalities using statistical moments. The proposed approach estimates an optimal threshold value automatically using statistical moments through histogram decomposition technique. Initially, the medical image database is preprocessed followed by ROI extraction and the performance of the proposed approach is compared with other techniques to verify its robustness.

Keywords

Histogram, Optimal Threshold, Moments, ROI, Medical Imaging Modalities.
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  • Automatic ROI Extraction in Noisy Medical Images

Abstract Views: 175  |  PDF Views: 4

Authors

S. Renukalatha
Department of Computer Science and Engineering, Sri Siddhartha Institute of Technology, India
K. V. Suresh
Department of Electronics and Communication Engineering, Siddaganga Institute of Technology, India

Abstract


Accurate segmentation of medical images is pivotal in medical image analysis as it favors the detection and quantification of abnormalities present in human anatomical structures. Since medical images are complex and sometimes noisy, effective extraction of the regions of abnormalities is a tedious process. Many semi-automatic segmentation algorithms with appreciable segmentation accuracy do exist in literature. However, these techniques are iterative, computationally expensive, involve human intervention demanding initial parameter settings and moreover, each one of them is specific to a particular modality. In addition, presence of noise further degrades the quality of the processed image. There is no general algorithm to extract the key regions from all types of noisy medical images. This paper proposes an automatic Region of Interest (ROI) extraction algorithm to detect the important regions in noisy medical images of different modalities using statistical moments. The proposed approach estimates an optimal threshold value automatically using statistical moments through histogram decomposition technique. Initially, the medical image database is preprocessed followed by ROI extraction and the performance of the proposed approach is compared with other techniques to verify its robustness.

Keywords


Histogram, Optimal Threshold, Moments, ROI, Medical Imaging Modalities.

References