Preventing chaining through transitions while favouring it within homogeneous regions
ISMM'11 Proceedings of the 10th international conference on Mathematical morphology and its applications to image and signal processing
Spatio-temporal quasi-flat zones for morphological video segmentation
ISMM'11 Proceedings of the 10th international conference on Mathematical morphology and its applications to image and signal processing
Hierarchical segmentation of multiresolution remote sensing images
ISMM'11 Proceedings of the 10th international conference on Mathematical morphology and its applications to image and signal processing
Fast quasi-flat zones filtering using area threshold and region merging
Journal of Visual Communication and Image Representation
Conditional Toggle Mappings: Principles and Applications
Journal of Mathematical Imaging and Vision
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For complex very-high-resolution satellite images, relevant image structures do not all correspond to image regional extrema, but also to plateaus with intermediate intensity values. In this case, dual or even self-dual morphological operations must be applied with care because they assume that the targeted image regions are either brighter or darker than their adjoining regions. A solution to this problem is to consider the image plateaus as the atomic image regions, and then cluster them so as to produce relevant segmentations and edge-preserving simplifications. This paper shows that this can be achieved by considering the concept of constrained connectivity. The problem of transition regions is emphasized, and a solution based on the concept of local extrema mosaic is proposed. An iterative area filter, ensuring that all connected components reach a minimum area threshold, is also described. All transformations are illustrated on sample IKONOS images.