Unformatted text preview: 15. Define the following terms: edgels, edge detection, edge operators, edge maps. 16. Gradient operators can be divided into three categories. Describe these three categories and give examples. * The Roberts operator, the Sobel operator, the Prewitt operator, the Laplacian, zero-crossings, and the Canny edge detector are all important to know about. (See ch. 10 of the textbook). 17. Give the form of the following edge operators: Roberts, Sobel, Prewitt. 18. What is thresholding? Give some advantages and disadvantages of this approach to segmentation. 19. Describe some different methods of threshold selection. Be sure to include the manual, P-tile method, the peak and valley method, and probabilistic threshold selection methods in your discussion. 20. What is local thresholding? 21. What is morphological closing? Morphological opening?...
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- Fall '08
- Image processing, important Gestalt Principles., Target Acquisition Process., following edge operators