Fast and robust method to estimate local orientations from the covariance matrix of the gradient. The estimation of the local orientation requires to define a size of neighbourhood around each pixel that contain several oriented objects.
If you use this plugin, please cite :
D. Jeulin, M. Moreaud. Segmentation of 2D and 3D textures from estimates of the local orientation. Image Analysis and Stereology, 2008, 27 (3), pp.183-192.
Update 20190528 : Fix a bug and add possibility to save the vector field.
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