![]() Uniqueness of Gaussian Kernel for Scale Space Filtering. Proceeding of the International Conference on Imaging Science, Systems, and Technology, Las Vegas, Nevada, June 1999.īabaud, J., A. ![]() Generalization of dorsal ratio for dolphin photoidentification. © 1999 Biomedical Engineering Society.Īraabi, B. The results obtained indicate that the computer extracted dorsal ratio can be used in place of the manually extracted dorsal ratio as part of the manual identification process. The system was tested using 296 digitized images of dolphins, representing 94 individual dolphins. The dorsal ratio is then computed from the curvature function at the appropriate smoothing scale. Curvature smoothing is performed at various smoothing scales, and wavelet coefficients are utilized to select an appropriate smoothing scale. This is followed by a curvature module to find the characteristic fin points: tip and two most prominent notches. The first component of the system consists of active contour modeling where the trailing edge of the dorsal fin is detected. ![]() This paper presents a computer-assisted system to extract the dorsal ratio for use in identification of individual animals. The manual computation of this ratio is time consuming, labor intensive, and user dependent. The dorsal ratio denotes the relative distances of the two largest notches from the tip on the dorsal fin. Marine biologists use a measurement called the “Dorsal Ratio” in the process of manual identification of bottlenose dolphins. ![]()
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