Suggestive contours for conveying shape
ACM SIGGRAPH 2003 Papers
Analyzing Image Structure by Multidimensional Frequency Modulation
IEEE Transactions on Pattern Analysis and Machine Intelligence
A blob detector in color images
Proceedings of the 6th ACM international conference on Image and video retrieval
A topological sampling theorem for Robust boundary reconstruction and image segmentation
Discrete Applied Mathematics
An attention model for extracting components that merit identification
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
A new sub-pixel map for image analysis
IWCIA'06 Proceedings of the 11th international conference on Combinatorial Image Analysis
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An approach to extract watersheds and watercourses, as well as their corresponding valleys and hills, from images with subpixel precision is proposed. The critical points of the terrain are essential as the starting points for the construction of these separatrices. They are extracted efficiently with subpixel precision using an approach based on derivatives of Gaussian filters. The separatrices are extracted by integrating their defining differential equation.Finally, the hills and valleys are constructed by an efficient graph search algorithm. Examples show the quality of the results that can be achieved with the proposed approach.