Achraf Ben-Hamadou

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This contribution deals with the calibration of active stereo-scopic systems consisting of a camera and a structured light projector. Usually, expensive equipments like precise calibration pieces or dedicated positioning devices are used for the projector calibration. We developed a flexible calibration method using only a planar target as calibration board(More)
Video endoscopy is one of the standard clinical procedures for visually detecting lesions on the internal wall of human bladders. In order to facilitate the diagnosis, it is helpful to build panoramic maps by registering consecutive images from the video sequence. We show how to efficiently reduce the computation time of graph cut based image registration(More)
Visual speech recognition remains a challenging topic due to various speaking characteristics. This paper proposes a new approach for lipreading to recognize isolated speech segments (words, digits, phrases, etc.) using both of 2D image and depth data. The process of the proposed system is divided into three consecutive steps, namely, mouth region tracking(More)
3D extended field of views (FOVs) of the internal bladder wall facilitate lesion diagnosis, patient follow-up and treatment traceability. In this paper, we propose a 3D image mosaicing algorithm guided by 2D cystoscopic video-image registration for obtaining tex-tured FOV mosaics. In this feasibility study, the registration makes use of data from a 3D(More)