Go for the smart cane. You can detach the cane and only use the sonar device. In addition, you could use the vOICe for Android to alert you of objects and also once you learn how to interpret the soundscapes determine what that object is. However, the clarity of images is subject to the level of light which may make things difficult in environments with less light.
There is also the after-sight model 1 at http://www.after-sight.com which combines an open source implementation of the vOICe with an ultrasound distance sensor. Pranav Search for previous postings at: http://firstname.lastname@example.org _______________________________________________ Mobile.accessindia mailing list Mobile.email@example.com http://accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in to post send mail to: firstname.lastname@example.org Disclaimer: 1. Contents of the mails, factual, or otherwise, reflect the thinking of the person sending the mail and AI in no way relates itself to its veracity; 2. AI cannot be held liable for any commission/omission based on the mails sent through this mailing list..