Dr. Judith E. Gold Profile

Dr. Judith E. Gold

Assistant Professor at Temple Univ

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Proceedings Article | 29 January 2010 Paper

Segmentation of thermographic images of hands using a genetic algorithm

Payel Ghosh, Melanie Mitchell, Judith Gold

Proceedings Volume 7538, 75380D (2010) https://doi.org/10.1117/12.839896

KEYWORDS: Image segmentation, Genetic algorithms, Wavelets, 3D modeling, Image processing algorithms and systems, Skin, Blood circulation, Transform theory, Binary data, Temperature metrology

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This paper presents a new technique for segmenting thermographic images using a genetic algorithm (GA). The individuals of the GA also known as chromosomes consist of a sequence of parameters of a level set function. Each chromosome represents a unique segmenting contour. An initial population of segmenting contours is generated based on the learned variation of the level set parameters from training images. Each segmenting contour (an individual) is evaluated for its fitness based on the texture of the region it encloses. The fittest individuals are allowed to propagate to future generations of the GA run using selection, crossover and mutation. The dataset consists of thermographic images of hands of patients suffering from upper extremity musculo-skeletal disorders (UEMSD). Thermographic images are acquired to study the skin temperature as a surrogate for the amount of blood flow in the hands of these patients. Since entire hands are not visible on these images, segmentation of the outline of the hands on these images is typically performed by a human. In this paper several different methods have been tried for segmenting thermographic images: Gabor-wavelet-based texture segmentation method, the level set method of segmentation and our GA which we termed LSGA because it combines level sets with genetic algorithms. The results show a comparative evaluation of the segmentation performed by all the methods. We conclude that LSGA successfully segments entire hands on images in which hands are only partially visible.

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