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Multi scale representation for remotely sensed images using fast anisotropic diffusion filtering Host Publication: Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International Authors: I. Vanhamel, M. Alrefaya and H. Sahli Publisher: IEEE Publication Date: Jul. 2010 Number of Pages: 4
Abstract: Object based image analysis has gained on the traditional per-pixel multi-spectral based approaches. One of such approaches is anisotropic diffusion. The main pitfall of using anisotropic diffusion for creating a multi scale representation of a remotely sensed image remains the computational burden. Producing the coarser scales in a multi scale representation or, diffusing spatially large images involves significant time and resources. This paper proposes a fast approach for anisotropic diffusion that overcomes spatial size limitations by distributing the diffusion as individual sub-processes over several overlapping sub-images. The overlap areas are synchronized at specific diffusion time ensuring that the fast approximation does not deviate too much from its equivalent single process. Experimental data for very large images that can not efficiently be processed using a sequential approach is illustrated. External Link.
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