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izach's avatar
izach
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6 years ago

What is the accuracy of the RealSense D435i?

Hello everyone. I'd like to use the D435i to capture a point cloud/3D Map of an object. The distance between camrea and object would be between 100-1000mm. What is the best/worst distance between t...
hien_vu's avatar
hien_vu
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5 years ago

Hi @MartyG,

Yes, I have changed it to 13 x 9 and square_size = 0.02 (cm)

I have tested with bigger like box real sense, the result is 10x15x6.6 but real is 9 x 14 x 5.

MartyG's avatar
MartyG
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5 years ago

I note in your script that you are using 1280x720 resolution. The optimal resolution for best depth accuracy with the D435 / D435i models is 848x480

  • hien_vu's avatar
    hien_vu
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    5 years ago

    Hi @MartyG,

    I have a re-config resolution 848x480, but it is still not more accuracy, you can check this image below:

    so if it can not have 100% accuracy, kindly provide me how percent accuracy we can have? so i will report for my manager.

    Thanks

    • MartyG's avatar
      MartyG
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      5 years ago

      It is not possible to achieve 100% accuracy, as the error factor (RMS Error) starts at around 0 at the camera lens and increases linearly over distance. It is expected that accuracy will be less than 1% of the distance of the observed object from the camera. For example, at 1 meter range this may convert to an expected accuracy of 2.5mm to 5mm. There are various factors, including environment and lighting, that can affect accuracy though.

      The correct method is to start the program without any objects on the chessboard and allow the cameras to calibrate, and then only place the object on the chessboard when the program asks you to. Are you using the program this way, please?

      • hien_vu's avatar
        hien_vu
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        5 years ago

        Hi @MartyG ,

        Sure, when I start the program without any object on the chessboard and after all calibrations finish the program shows the command line: place the box in the FOV of the view... I use it right, please?

        And one more question, how about small objects such as lipsticks, USB, ...? with normal set up I saw the program can not detect them, so you have any idea for measurement dimensions them?

        Thank you