Projects
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Completed
BLaDE
BLaDE (Barcode Localization and Decoding Engine) is an Android smartphone app designed to enable a blind or visually impaired user find and read product barcodes.
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Completed
Crosswatch
Crosswatch is a smartphone-based system developed for providing real-time guidance to blind and visually impaired travelers at traffic intersections.
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Completed
Go and Nogo Decision Making
The decision to make or withhold a saccade has been studied extensively using a go-nogo paradigm, but little is known about the decision process underlying pursuit of moving objects. Prevailing models describe pursuit as a feedback system that responds reactively to a moving stimulus. However, situations often arise in which it is disadvantageous to pursue, and humans can decide not to pursue an object just because it moves. This project explores mechanisms underlying the decision to pursue or maintain fixation. Our paradigm, ocular baseball, involves a target that moves from the periphery toward a central zone called the "plate".
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Completed
Integration and Segregation
Traditionally, smooth pursuit research has explored how eye movements are generated to follow small, isolated targets that fit within the fovea. Objects in a natural scene, however, are often larger and extend to peripheral retina. They also have components that move in different directions or at different speeds (e.g., wings, legs). To generate a single velocity command for smooth pursuit, motion information from the components must be integrated. Simultaneously, it may be necessary to attend to features of the object while pursuing it.
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Completed
Video-Based Speech Enhancement for Persons with Hearing and Vision Loss
Observing the visual cues from a speaker such as the shape of the lips and facial expression can greatly improve the speech comprehension capabilities of a person with hearing loss. However, concurrent vision loss can lead to a significant loss in speech perception. We propose developing a prototype device that utilizes a video camera in addition to audio input to enhance the speech signal from a target speaker in everyday situations.
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Inactive
Optimizing Echoacoustics: An online perceptual study (Under construction)
An online study of echoacoustic perception
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Inactive
Oculomotor Control
The binocular coordination of movements of the eyes is a complex issue controlled by many brainstem nuclei, and is subject to a wide variety of forms of disruption by traumatic brain injury and oculomotor muscles disorders.
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Inactive
Low Vision Support Group
Join Dr. Don Fletcher, one of the world’s leading authorities on Low Vision Rehabilitation, to share experiences and learn about the things that help you maintain a full and happy life while living with low vision.
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Inactive
Braille, Assistive Technology, and Reading Comprehension
This project explores the impact of presentation mode (braille vs. audio) and using different assistive technology (i.e., refreshable braille displays and screen reader) on reading comprehension ability.
