Anisotropic approaches for imaging problems adapted to human visual perception

Date(s) : 16/11/2018   iCal
14 h 00 min - 15 h 00 min

The use of anisotropic approaches has a long tradition in the imaging community. Historically, such methods date back to the seminal work of J. Weickert where PDEs based on anisotropic diffusion were applied to solve several image restoration models such as denoising, deblurring etc. Recently, the use of directional models has been reinterpreted for the design of new image regularisers and applied to a wide variety of imaging tasks due to their better behaviour in terms of structure and geometry preservation. In the first part of this talk, I will review the main contributions in this field and present my recent work on this topic discussing the use of the anisotropic osmosis PDE in several contrast-equalisation and shadow removal problems. In the second part of the talk, I will connect the connections between these classical approaches to my ongoing work on cortical-inspired contrast and color perception models where the local anisotropy (i.e. orientation) in the image appears naturally as a result of a `lifting’ procedure extending the image from a bi- to a three-dimensional space.

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