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Spatially-Variant Directional Mathematical Morphology Operators Based on a Diffused Average Squared Gradient Field

Abstract : This paper proposes an approach for mathematical morphology operators whose structuring element can locally adapt its orientation across the pixels of the image. The orientation at each pixel is extracted by means of a diffusion process of the average squared gradient field. The resulting vector field, the average squared gradient vector flow, extends the orientation information from the edges of the objects to the homogeneous areas of the image. The provided orientation field is then used to perform a spatially variant filtering with a linear structuring element. Results of erosion, dilation, opening and closing spatially-variant on binary images prove the validity of this theoretical sound and novel approach.
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Rafael Verdu-Monedero, Jesus Angulo. Spatially-Variant Directional Mathematical Morphology Operators Based on a Diffused Average Squared Gradient Field. 10th International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS 2008, Oct 2008, Juan les Pins, France. pp.542-553, ⟨10.1007/978-3-540-88458-3_49⟩. ⟨hal-00834032⟩

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