All-in-focus imaging technique used to improve 3D retinal fundus image reconstruction

In this paper we have applied the stacking technique on images from a medical device. There is an urgent need in ophthalmology for more cost effective instrumentation for the early diagnosis of glaucoma, one of the leading diseases in the cause of blindness worldwide. The current techniques involve expensive optical equipments generally called fundus camera, which most of the time capture a single high resolution frame for one eye at a time. In this research we have used stereoscopic videos of a state-of-the-art 3D retinal camera, which has simpler optics and electronics when compared to current monoscopic models. Nevertheless, the cross correlation algorithms for depth computation are very sensible to image noise and out of focus regions. We demonstrate the efficiency of our technique on experiments involving a sequence of images extracted from videos in simulations of optic nerves using artificial objects. Categories and Subject Descriptors D.2.8 [Computer Applications]: Life and ...

• Type: Journal
• Year: 2015
• Where: SAC
• Authors: Danilo Motta, Luciana de Matos, Amanda Caniatto de Souza, Rafael Marcato, Afonso Paiva, Luis Alberto Vieira de Carvalho
• Keywords: Applied Computing, SAC 2015