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ii To my Savior, through whom I am renewed. To my families, whose love continues to nourish me. iii ACKNOWLEDGMENTS Upon the completion of this dissertation, I realized that there will never be the perfect words to express my gratitude towards those who have inspired, encouraged and motivated me through my years at Purdue. Yet, these names and faces will(More)
In this paper, we propose an extension to our previous work on food portion size estimation using a single image and a multi-view volume estimation method. The single-view technique estimates food volume by using prior information (segmentation and food labels) generated from food identification methods we described earlier. For multi-view volume(More)
In this paper we investigate a method for selectively modifying a video stream using a color contrast sensitivity model based on the human visual system. The model identifies regions of high variance with frame to frame differences that are visually imperceptible to a human observer with normal color vision. The model is based on the CIELAB and the CIE ΔE(More)
In this paper we describe three methods for recognition, segmentation and retrieval of gang graffiti images. The first method is color recognition based on touchscreen tracing, the second method is color image segmentation based on Gaussian thresholding and the third method is content based image retrieval. Our experimental results show an image retrieval(More)
ii ACKNOWLEDGMENTS I would like to begin by giving thanks to my major advisor, Professor Mark J.T. Smith, for his guidance and support both financially and mentally. His attitudes towards his work and good habits influenced me deeply. As the head of ECE department, he had numerous meetings to attend during the day, however, he managed to focus on his(More)
This is to certify that the thesis/dissertation prepared By Entitled For the degree of Is approved by the final examining committee: Chair To the best of my knowledge and as understood by the student in the Research Integrity and Copyright Disclaimer (Graduate School Form 20), this thesis/dissertation adheres to the provisions of Purdue University's "(More)
ii Dedicated to my parents and my sisters. iii ACKNOWLEDGMENTS This is a great opportunity for me to share my tears of joy with loved ones and to express my immense gratitude to those who helped me on my academic journey. The memory of my first day at Purdue on June 6, 2002 is still very vivid for me. It is hard for me to believe that this long journey has(More)
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