Non-Additive Approach for Omnidirectional Image Gradient Estimation - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Conference Papers Year : 2007

Non-Additive Approach for Omnidirectional Image Gradient Estimation


The way catadioptric images are acquired implies that they present radial distortions. Therefore, classical processing may not be suitable. This statement will be illustrated by considering edge detection matter. Classical edge detectors usually consist in three steps : gradient computation, maximization and thresholding. The two lasts steps use pixels neighborhood concept. On the opposite of perspective images where pixel neighborhood is intuitive, catadioptric images present radial resolution changes. Then, the size and shape of pixel neighborhood have to be depending on pixel location. This article presents a new gradient estimation approach based on non-additive kernels. This technique is adapted to catadioptric images and also provides a natural threshold discarding the arbitrary thresholding step.
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lirmm-00194216 , version 1 (06-12-2007)


  • HAL Id : lirmm-00194216 , version 1


Florence Jacquey, Frédéric Comby, Olivier Strauss. Non-Additive Approach for Omnidirectional Image Gradient Estimation. ICCV'07: International Conference on Computer Vision OMNIVIS'07: Workshop on Omnidirectional Vision, Camera Networks and Non-classical Cameras, Oct 2007, Rio de Janeiro, Brésil, pp.1-4. ⟨lirmm-00194216⟩
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