Browsing by Author "Chirino M."
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Item On the illumination compensation of retinal images by means of the bidimensional empirical mode decomposition(SPIE, 2015) Marrugo A.G.; Vargas R.; Chirino M.; Millán M.S.; Garcia-Arteaga J.D.; Brieva J.; Lepore N.Retinal images are used for diagnostic purposes by ophthalmologists. However, despite controlled conditions in acquisition retinal images often suffer from non-uniform illumination which hinder their clinical use. In this work we propose the compensation of the illumination by modeling the intensity as a sum of non-stationary signals using bidimensional empirical mode decomposition (BEMD). We compare the estimation and compensation of the background illumination with a widely used technique based retinal image pixel classification. The proposed method has shown to provide a better estimation of the background illumination, particularly in complicated areas such as the optic disk (usually bright) and the periphery of fundus images (usually dim). © 2015 SPIE.