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Region of Interest (ROI) extraction from geographical map image is an important task of document analysis and recognition. The extracted segments are applied to different machine vision and embedded system. The task is very complex because of having overlapping objects, more types of data, possible curvature, even branching of graphics, intersected lines etc in map. Keeping this in mind, this book describes two methods that have been applied to extract efficient ROI for both road network and waterway from geographical map; one is color based segmentation applying K-means clustering and other...