Casaca, Wallace Correa de O. [UNESP]Boaventura, Maurílio [UNESP]2014-05-272014-05-272009-12-01Proceedings of SIBGRAPI 2009 - 22nd Brazilian Symposium on Computer Graphics and Image Processing, p. 164-171.1530-1834http://hdl.handle.net/11449/71301In this paper a new partial differential equation based method is presented with a view to denoising images having textures. The proposed model combines a nonlinear anisotropic diffusion filter with recent harmonic analysis techniques. A wave atom shrinkage allied to detection by gradient technique is used to guide the diffusion process so as to smooth and maintain essential image characteristics. Two forcing terms are used to maintain and improve edges, boundaries and oscillatory features of an image having irregular details and texture. Experimental results show the performance of our model for texture preserving denoising when compared to recent methods in literature. © 2009 IEEE.164-171engDe-noisingDiffusion processForcing termsImage characteristicsNon-linear anisotropic diffusionNonlinear diffusionTexture imageComputer graphicsDifferential equationsDiffusionFourier seriesHarmonic analysisImage processingImaging systemsTexturesTrabalho apresentado em evento10.1109/SIBGRAPI.2009.33WOS:000289696300022Acesso aberto2-s2.0-779496019506958497786939585