PURPOSE (1) The purpose of this study was to describe significance and prevalence of the newly reported pearl necklace spectral domain optical coherence tomography (SDOCT) sign, in diabetic macular edema (DMO), (2) to track the course of this sign over a period of at least 10 months. MATERIALS AND METHODS The pearl necklace SDOCT sign refers to hyperreflective dots in a contiguous ring around...

This diploma thesis investigates integrated tracking and recognition in continuous sign language recogntion as well as efficient approximations to it. Current state-of-the art sign language recognition system use tracking only as a preprocessing step. Hence, tracking errors lead to recognition errors. We propose to integrate scoring functions of a model-free dynamic programming tracking framewo...

We report on a right-handed, deaf, life long signer who suffered a left posterior cerebral artery (PCA) stroke. The patient presented with right homonymous hemianopia, alexia and a severe sign comprehension deficit. Her production of sign language was, however, virtually normal. We suggest that her syndrome can be characterized as a case of 'sign blindness', a disconnection of the intact right ...

The borders of human visual areas V1, V2, VP, V3, and V4 were precisely and noninvasively determined. Functional magnetic resonance images were recorded during phase-encoded retinal stimulation. This volume data set was then sampled with a cortical surface reconstruction, making it possible to calculate the local visual field sign (mirror image versus non-mirror image representation). This meth...

We describe a novel approach and practical solution to an interactive sign language machine translation system from English to South African Sign Language. We interface the system with the GNApp application, which is an augmentative and alternative communication front-end, in order to resolve word sense ambiguities. This enhances the correctness of the rule-based translation system. We also arg...

This paper investigates the expression of referent location, motion, and action in signed event nar­ ratives in two unrelated, yet historically comparable sign languages, German Sign Language (DGS) and Turkish Sign Language (TÍD). In particular, it focuses on how classifier and lexical predicates are used to map event space onto sign space from the perspective of either an external observer or ...

PURPOSE To describe the presence of "peripheral low intensity sign" in hepatic hemangioma in the hepatobiliary phase (HP) of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) and to compare the frequency of this sign between hepatic hemangiomas and hepatic metastases. MATERIALS AND METHODS The Institutional Review Board approve...

Hidden Markov models (HMM's) have been used prominently and successfully in speech recognition and, more recently, in handwriting recognition. Consequently , they seem ideal for visual recognition of complex, structured hand gestures such as are found in sign language. We describe an HMM-based system for recognizing sentence level American Sign Language (ASL) which attains a word accuracy of 99...

We make a first attempt at distinguishing information-carrying visual signal by comparing visual characteristics of American Sign Language and everyday human motion, to identify what clues might be available in one but not in the other. The comparison indicated significantly higher fractal complexity in sign language across tested frequency bands (0.01-15 Hz), as compared to everyday motion. A ...