Improved adaptive complex diffusion despeckling filter

• Author(s): Bernardes, Rui ; Maduro, Cristina ; Serranho, Pedro ; Araújo, Adérito ; Barbeiro, Sílvia ; Cunha-Vaz, José
• Date: 2010
• Persistent ID: http://hdl.handle.net/10400.2/1956
• Origin: Repositório Aberto da Universidade Aberta
• Subject(s): Speckle; Spatial filtering; Image processing; Optical coherence tomography; Ophthalmology; Optical diagnostics for medicine
• Document Type: Article
• Language: English

Description

Despeckling optical coherence tomograms from the human retina is a fundamental step to a better diagnosis or as a preprocessing stage for retinal layer segmentation. Both of these applications are particularly important in monitoring the progression of retinal disorders. In this study we propose a new formulation for a well-known nonlinear complex diffusion filter. A regularization factor is now made to be dependent on data, and the process itself is now an adaptive one. Experimental results making use of synthetic data show the good performance of the proposed formulation by achieving better quantitative results and increasing computation speed.