Abstract
Peripheral vision loss is the lack of ability to recognise objects and shapes in the outer area of the visual field. This condition can affect people’s daily activities and reduces their quality of life. In this work, a smart technology that implements computer vision algorithms in real-time to detect and track moving hazards around people with peripheral vision loss is presented. Using smart glasses, the system processes real-time captured video and produces warning notifications based on predefined hazard danger levels. Unlike other obstacle avoidance systems, this system can track moving objects in real-time and classify them based on their motion features (such as speed, direction, and size) to display early warning notification. A moving camera motion compensation method was used to overcome artificial motions caused by camera movement before an object detection phase. The detected moving objects were tracked to extract motion features which were used to check if the moving object is a hazard or not. A detection system for camera motion states was implemented and tested on real street videos as the first step before an object detection phase. This system shows promising results in motion detection, motion tracking, and camera motion detection phases. Initial tests have been carried out on Epson’s smart glasses to evaluate the real-time performance for this system. The proposed system will be implemented as an assistive technology that can be used in daily life.
Highlights
Age-related macular degeneration (AMD), cataract and glaucoma are the leading causes of blindness worldwide [1]
Central vision loss is caused by AMD and cataract while glaucoma affects mainly the peripheral vision [1]
The authors proposed a combined frame difference and background subtraction method with an adaptive threshold that was calculated using the Otsu method and the detection performance was improved reaching 99.6% accuracy compared with the fixed threshold methods
Summary
Age-related macular degeneration (AMD), cataract and glaucoma are the leading causes of blindness worldwide [1]. Central vision loss is caused by AMD and cataract while glaucoma affects mainly the peripheral vision [1]. Vision problems can involve visual acuity, visual field, and colour impairments [2]. Visual acuity problems due to central causes such as refractive errors and cataract can be corrected. Visual field loss caused by brain injury or other diseases such as glaucoma is typically irreversible and non-corrected by traditional solutions as eyeglasses and lenses[3]. Central vision is where objects are clearly and sharply seen and used to perform most of the daily activities.
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More From: International Journal of Advanced Computer Science and Applications
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