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Final Presentation May, 2011. AISN. http://www.cs.bgu.ac.il/~royif/AISN. A uditory I maging for S ightless N avigation. Project Team. Academic Advisor: Prof. Yuval Elovici Technical Advisor : Dr. Rami Puzis Team Members: Yakir Dahan Vitali Sepetnitsky Royi Freifeld.
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Final Presentation May, 2011 AISN http://www.cs.bgu.ac.il/~royif/AISN Auditory Imaging for Sightless Navigation
Project Team Academic Advisor: Prof. Yuval Elovici Technical Advisor: Dr. Rami Puzis Team Members: YakirDahan Vitali Sepetnitsky RoyiFreifeld
General Overview • Introduction • Motivation & Problem Domain • Existing Solutions • Our Solution • Project Goals • System Architecture • General Diagram • Description of modules – A closer look • Technologies • The system in action …
IntroductionMotivation • Most of our navigation in the everyday life heavily depends on visual feedback that we get from our environment • When the ability to see the surroundings is missing due to visual impairments, the ability to navigate is also damaged
IntroductionExisting Solutions • Physical sense: • White Cane • Guide Dog Drawbacks: • Limit the freedom of their owner • Guide dogs are expensive to train and intended to only a small part of the blind community • Sensory substitution: • Warning of obstacles (e.g. Optical Radar) • Sonar-like images scanning (e.g. The vOICe) Drawbacks: • Requires an intensive training and is hard to get used to, due to a non-intuitive conversion between image and sound
IntroductionOur Solution A combination of visual information processing and 3D sound creation and positioning: • Taking a stream of frames • Processing the frames and retrieving visual information • Creating appropriate sounds • Performing an auditory spatialization of the sound
IntroductionProject Goals • Sightless navigation by sensory substitution A development of an application that allows a person to navigate, relying primarily on the sense of hearing • Integration with a spatial auditory environment • Providing a flexible environment for future research
System Architecture Sound_T pixel_t 3rd party
System ArchitectureA Closer Look • UI Unit: • Enables the user to configure the system through a user-friendly GUI • Core Unit: • The system’s engine • Responsible for: • Initializing the system • Running all the components • Communicating with hardware and database
System ArchitectureA Closer Look (cont.) • Image-Processing Unit: • Receives images obtained from a camera and retrieves visual information • Sound-Creation Unit: • Responsible for creating appropriate sounds according to the visual information • Sound-Positioning Unit: • Performs auditory spatialization of the soundin the 3D space
System ArchitectureA Closer Look (cont.) • General Database: • Contains the data relevant to an interaction of the system with users e.g. • Profiles • Data about installed technologies • Technologies Data Storage: • Contains the installed technologies used by the system
UsedTechnologies & PlatformsGeneral • The application was designed for Linux OS • Code written in C/C++ • Eclipse IDE & QtSDK for GUI • Handling HRTF data by calling MATLAB routines from the code • Database by MySQL RDBMS
UsedTechnologies & PlatformsWithin the system • Integration with Primesense 3D camera using OpenNI API • Image processing by OpenCVlibrary • Sound positioning by Integration with Sound Scape Renderer (SSR) and OpenAL API • Audio connection handling using JACK audio server daemon
aNY Questions ? Thank You!
