Self-adjusting binary search trees: an investigation of their space and time efficiency in texture analysis of magnetic resonance images using the spatial gray-level dependence method

Andreas I. Svolos; Andrew Todd-Pokropek

doi:10.1117/12.310891

24 June 1998 Self-adjusting binary search trees: an investigation of their space and time efficiency in texture analysis of magnetic resonance images using the spatial gray-level dependence method

Andreas I. Svolos, Andrew Todd-Pokropek

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Proceedings Volume 3338, Medical Imaging 1998: Image Processing; (1998) https://doi.org/10.1117/12.310891
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

Texture feature extraction is a fundamental stage in texture analysis. Therefore, the reduction of its computational time and memory requirements should be an aim of continuous research. The Spatial Gray Level Dependence Method (SGLDM) is one of the most significant statistical texture description methods, especially in medical image analysis. However, the co-occurrence matrix is inefficient in terms of time and memory requirements. This is due to its dependency on the number of grey levels in the entire image. Its inefficiency puts up barriers to the wider utilization of the SGLDM in a real application environment. This paper investigates the space and time efficiency of self-adjusting binary search trees, in replacing the co-occurrence matrix. These dynamic data structures store only the significant textural information extracted from an image region by the SGLDM. Furthermore, they have the ability to restructure themselves in order to adapt to the co-occurrence distribution of the grey levels in the analyzed region. This results in a better time performance for texture feature extraction. The proposed approach is applied to a number of magnetic resonance images of the human brain and the human femur. A comparison with the co-occurrence matrix, in terms of space and computational time, is performed.

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Andreas I. Svolos and Andrew Todd-Pokropek "Self-adjusting binary search trees: an investigation of their space and time efficiency in texture analysis of magnetic resonance images using the spatial gray-level dependence method", Proc. SPIE 3338, Medical Imaging 1998: Image Processing, (24 June 1998); https://doi.org/10.1117/12.310891

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KEYWORDS

Magnetic resonance imaging

Image analysis

Statistical analysis

Brain

Medical imaging

Feature extraction

Neuroimaging

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