measurement of tire

• MartyG

  • January 06, 2025 12:48
  • Edited

  Hi Himanshu Pradhan  A suitable RealSense camera model for this application would be one that has excellent accuracy and image quality at close / very close range.  The RealSense D405 would fit those requirements.

  https://www.intelrealsense.com/depth-camera-d405/

   

  I used a D405 to depth-sense a material with a tire-like texture and achieved very good results.

   

  

   

  RealSense cameras can have difficulty rendering shallow surface depressions.  D405 is specifically designed for close-range depth sensing.  Other RealSense camera models may render a surface with depressions as having the same solid color due to not being able to perceive the depressions.

   

  I cut a few strips from the black material and arranged them on top of the rest of the material to simulate the approximate depth of the tread on a new tire.  D405, thanks to its very close range sensing, was able to clearly render the difference in depth.

   

  

   

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• Himanshu Pradhan

  • January 07, 2025 06:36
  • Edited

  
  For measuring the diameter of a tire, will I directly get values in millimeters using the SDK, or will additional processing be required?

  Regarding its operating range, the best distance mentioned is 50 cm. Based on my understanding, objects need to be within the range of 7 to 50 cm. Could you confirm if this close range would allow the camera to capture the tire diameter in the frame view? What steps should I follow to confirm this?

  Additionally, can this camera be connected to a mobile or tablet to run the script?

  Is it possible to connect with Intel product support via Zoom or Teams for further clarification on these doubts?

   

  Regards,

  Himanshu

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• MartyG

  • January 07, 2025 11:20

  Although the ideal depth sensing range of the D405 is 7 to 50 cm, it can render depth that is up to a couple of meters away.  The camera would not be able to read the depth of the tire tread grooves at further distance than around 7 cm though.

   

  Whilst most RealSense 400 Series cameras return depth as a meter value, D405 can return millimeter depth values because it uses a different depth scale to the other 400 Series models.

   

  

   

  Based on my tests with a large cardboard box with dimensions similar to a wheel, a car wheel should fit in the D405's view at around 50 cm distance if you are measuring the circular hub-side of the wheel horizontally, and the edge of the wheel with the tire tread on would definitely fit the horizontal view easily.  Because RealSense cameras have a shorter vertical field of view than the horizontal plane though, a wheel would likely not fully fit in the view vertically at 50 cm and so would have to have the diameter measured in the horizontal direction.

   

  If you are just measuring the width of the tire and not analyzing its tread then you could move the camera further away to fit the wheel fully into the vertical view.  As demonstrated by the above depth image's view of a window and its sill, you can get good depth detail with D405 even at a couple of meters away.

   

  You should be able to connect the camera to a Windows tablet computer that runs the full Windows 10 or 11.  It would also be possible to program a RealSense depth sensing application yourself to run on an Android mobile or tablet.

   

  Support is normally provided through messages on this website, though it is possible to communicate with Intel RealSense Help Center team members on a private support ticket.

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