In the automatic analysis of retinal images for diagnosing various eye diseases such as diabetic retinopathy, glaucoma etc. the automatic detection of the optic disc is a crucial step. Before processing the fundus image for detecting any type of retinal disease it is necessary to mask out the anatomical features of eye so that they will not be mistaken as abnormality. Optic disc often considere...

Supra-threshold spatial integration was studied by testing the saliency of multi-Gabor element configurations in short duration binocular rivalry (dichoptic masking) conditions. Dichoptic presentations allow for a competition between spatially overlapping supra-threshold stimuli that involve non-overlapping monocular receptive fields in the first stage of visual filtering. Different spatial con...

BACKGROUND Surgical treatment and complications in patients with zygomatic bone fractures can lead to a significant degree of tissue trauma resulting in common postoperative symptoms and types of pain, facial swelling and functional impairment. Beneficial effects of local cold treatment on postoperative swelling, edema, pain, inflammation, and hemorrhage, as well as the reduction of metabolism,...

The visibility of stimuli flickering at low temporal frequencies was studied with images viewed normally and when stabilized by a new technique (bleached-window stabilization) that produces perfectly stabilized images without attachment to the eye. Contrary to expectation, sensitivity to low-frequency flicker was higher in the stabilized than in the unstabilized case. Several controls exclude t...

This paper describes a text-to-audiovisual speech synthesizer system incorporating the head and eye movements. The face is modeled using a set of images of a human subject. Visemes, that are a set of lip images of the phonemes, are extracted from a recorded video. A smooth transition between visemes is achieved by morphing along the correspondence between the visemes obtained by optical flows. ...

Inhalation or intravenous anesthesia along with controlled or assisted mask ventilation is frequently used for interventions with short duration in pediatric patients, especially in surgical centers with high turnover and when laryngeal mask airways do not fit. To achieve one-handed mask ventilation the anesthesiologist has to stand behind the head, and the mask is held with one hand against th...

Masking is said to occur when a mask stimulus interferes with the visibility of a target (test) stimulus. One widely held view of this process supposes interactions between mask and test mechanisms (cross-channel masking), and explicit models (e.g., J. M. Foley, 1994) have proposed that the interactions are inhibitory. Unlike a within-channel model, where masking involves the combination of mas...

Introduction: The aim of this study was to determine the accuracy of two different immobilization methods in patient positioning in cranial radiotherapy. The six-dimensional (6D) target localization accuracy of using a dedicated stereotactic mask was compared with that of a conventional head mask by the ExacTrac system. Material and Methods: ...