Synonyms
Definition
Gradient vector flow is the vector field that is produced by a process that smooths and diffuses an input vector field and is usually used to create a vector field that points to object edges from a distance.
Background
Finding objects or homogeneous regions in images is a process known as image segmentation. In many applications, the locations of object edges can be estimated using local operators that yield a new image called an edge map. The edge map can then be used to guide a deformable model, sometimes called an active contour or a snake, so that it passes through the edge map in a smooth way, therefore defining the object itself.
A common way to encourage a deformable model to move toward the edge map is to take the spatial gradient of the edge map, yielding a vector field. Since the edge map has its...
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References
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Xu, C., Prince, J.L. (2020). Gradient Vector Flow. In: Computer Vision. Springer, Cham. https://doi.org/10.1007/978-3-030-03243-2_712-1
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DOI: https://doi.org/10.1007/978-3-030-03243-2_712-1
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