Nice overview :) Questions from an engineer, as usual: 1) What's the active power-consumption? 2) What processing time is needed in an ideal situation? (perpendicular view, oriented code, sufficient lighting, large code) 3) Is this different than a "worst-case" situation? (small code, tilted & skewed code, poor lighting, gradient-lighting) 4) Are there situations where the sensing system shall perform unpredictably? (e.g. when _two_ QR-codes are simultaneously visible to the camera) 5) Is there a typical "depth of focus"? Can the code be placed at any distance, as long as the solid-angle subtended by the code at the camera is more than xyz steradian? Thanks!
Good questions :D 1) The active power consumption is about 0.9W according to the preliminary test. 2) Based on the information provided by the manufacturer, 50ms is needed to process in an ideal situation (perpendicular view, oriented code, sufficient lighting, large code). 3) Yes, factors like small code, tilted & skewed code, poor lighting and gradient-lighting will affect the processing time, but it will not be over 150ms. 4) Generally, the module performs predictably as long as the distance is rational and the code is correct. According to the test, it will decode the one that is easier to recognize in the FoV based on the algorithm when two QR codes are simultaneously visible to the camera. 5) The best distance between the camera and the code is 10-45cm, at which the code is clear to the camera. Thanks for your continued support.
How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.
How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.
That qr code explanation there was probably the absolute best in regards to the time it took.
Nice overview :)
Questions from an engineer, as usual:
1) What's the active power-consumption?
2) What processing time is needed in an ideal situation? (perpendicular view, oriented code, sufficient lighting, large code)
3) Is this different than a "worst-case" situation? (small code, tilted & skewed code, poor lighting, gradient-lighting)
4) Are there situations where the sensing system shall perform unpredictably? (e.g. when _two_ QR-codes are simultaneously visible to the camera)
5) Is there a typical "depth of focus"? Can the code be placed at any distance, as long as the solid-angle subtended by the code at the camera is more than xyz steradian?
Thanks!
Good questions :D
1) The active power consumption is about 0.9W according to the preliminary test.
2) Based on the information provided by the manufacturer, 50ms is needed to process in an ideal situation (perpendicular view, oriented code, sufficient lighting, large code).
3) Yes, factors like small code, tilted & skewed code, poor lighting and gradient-lighting will affect the processing time, but it will not be over 150ms.
4) Generally, the module performs predictably as long as the distance is rational and the code is correct. According to the test, it will decode the one that is easier to recognize in the FoV based on the algorithm when two QR codes are simultaneously visible to the camera.
5) The best distance between the camera and the code is 10-45cm, at which the code is clear to the camera.
Thanks for your continued support.
@@DFROBOTCN Thanks!
How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.
@@PrashantKumar-qp4er (1)fluorescence. (2) usually not; camera instead of bit-stream (3) Too bad - you should bring it to their attention
We use QE codes for reports/info on a microscope slide . also to gibe code commands to drones.
the microscope slide is a good example
How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.
We also use the barcodes of the serial number on the boxes as we get new Tellos to bui9ld our inventory of the drones in Excel spreadsheet.
I am curious about the way the reader works and like seeing that Galois Theory is applied in this process.
if can buy into amazon???
Membership cards, ID badges.