WHERE they are:

This is accomplished in any of a few ways.

1. The BPS is be able to position the BlindSquare user to within a short distance of any destination, the last feet (or cm) can be found with common O&M skills.   We are advised, by BlindSquare users, to always presume human skills and the cane is a trusted tool.
   
2. The location (and direction specific) message from the BPS can further assist the finding of the QR.  
   Example: the BPS message can instruct "The men's restroom is to your right. A QR is located 4 feet from the floor on the left door threshold.  You will also find a braille sign".
   
3. The locations of QR's can be universal for the environment (building).
   Example: the BPS message on entry to a building can advise " You will find a QR available 4 feet from the floor on the left threshold where description of the area beyond is provided"  This can help define the layout of the room, location of elements in the room such as power outlets, WIFI passwords, telephone, light switches and more.
   
4. QR's can provide information about additional QR's
   Example: A QR in an elevator can advise of the location of a second QR to mark the location of a security scanner.   The QR reader will alert when the QR code is discovered, in such proximity's this will advise of the found device within an inch.

For most, yes.   As QR Codes are containers if a "lot" of information needs to be contained the result is a very dense pattern.  Dense patterns require a steady hand and precise focus to be read.

BLINDSQUARE QR's, while following the QR Code standards are different.    BlindSquare QR's are uniquely encoded and do NOT require dense patterns.  As a result, with success, BlindSquare QR's can be:

• read from greater distances
• read from greater angles (up to 45 degrees from the plane of the QR)
• read more quickly (as there is little data to translate)
• read more easily, for all the reasons above!

BUT more.  BlindSquare QR's can also be ready by ANY QR Code reader.  The result will not lead to BlindSquare's datasets, but can result with a redirect to a website, text information or any other facility available to standard QR Codes.

NOTE: ABOVE ILLUSTRATION IS FROM A STANDARD QR-CODE READER.  YOU WILL OBSERVE THE REQUIREMENT TO PLACE THE QR-CODE WITHIN AN ON-SCREEN FRAME TO BE AQUIRED.  THE BLINDSQUARE QR-READER DOES NOT USE SUCH A FRAME. THE ACQUIRING OF THE QR (OR QR-CODE) IS COMPLETED IF PRESENT ANYWHERE ON-SCREEN.  THE RESULT CONTRIBUTES TO THE LOWER PRECISION REQUIRED TO ACQUIRE.

1. Yes.   With the BlindSquare QR-Reader will read all QR-Codes and will resolve in the manner first-designed.

2. Yes.   With the BlindSquare QRS, conventional QR-Codes, containing static information, can be repurposed and function as dynamic when scanned using the BlindSquare QR-reader.

(psst... we like saying Yes)

For most uses of QR Codes, this is a challenge as the information is stored in the "container" of the QR Code.  Changing the information content is easy, having to reprint and distribute updated QR Codes - that's another problem.

For BlindSquare QR's, as is the case with all BlindSquare services, the data exists in the cloud.  In the event information needs to change (example, the layout of a meeting room, or a restroom closed for repair) one need only update (from anywhere, including a smart phone, tablet, ChromeBook, PC, Mac), click a supplied link to update the cloud and the next scan OF THE SAME QR, provides current information.

Above is a actual example of the use of QR's in support of information for hikers in a trail system.  Great idea, but if you scan the marked QR-Code you'll quickly discover that the QR-Code container data leads to a broken URL, preventing access to the information.  In the case of a BlindSquare QR this could be remedied immediately and would not require the replacement of the physical QR (and avoiding cost to recreate/replace).

No problem.  BlindSquare follows the published guidelines for the use of QR Codes and will resolve in a planned manner.  This could include anything that the QR Code specification provides.

BlindSquare (all versions) will read and respond to all QR codes, magazines or otherwise.  The use-behaviour of the BlindSquare user interface remains.  Full camera scanning, managing of the camera/flashlight, alerts (audible/haptic) all remain available for standard QR codes.

Yes.

That's a secret.  *smile*