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[D455] Calibration

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Nguyenduyduc14

Hi,

1. Do you have any videos about calibration for D455?

I want to know how to do it step by step and see the results before and after calibrating but I can not find it.

2. I have a D455, but how do I know if all setup is good or not? Do you have a guide about setup a camera for measurement?

3. For my case, I need to measure x, y, and z distances from Point A to Point B, I use IntelRealsense Viewer - 3D mode and check the value at point A and point B, the values change about 7mm, sometimes 10mm. Do you have any guides to change the setup to decrease these changes?

Thanks

 

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  • MartyG

    Hi Nguyenduyduc14  Thanks very much for your questions.

     

    1.  The RealSense SDK has a set of self calibration tools for depth image quality (On-Chip), depth accuracy (Tare) and focal length (Focal Length) that can be found by left-clicking on the More option near the top of the RealSense Viewer tool's options side-panel.

     

     

    After a calibration is completed, a health check score is provided by the tool, with the choice to save the calibration to the camera hardware or dismiss it and repeat the calibration to achieve a better score.

     

    A white-paper guide document for these calibration tools can be found at the link below.

    https://dev.intelrealsense.com/docs/self-calibration-for-depth-cameras

     

    The official RealSense channel on YouTube also has a short video about On-Chip calibration. 

    https://www.youtube.com/watch?v=pcoYc4YPVMY

     

    2.  Intel provide a range of guides for RealSense 400 Series cameras at the white-paper index page.

    https://dev.intelrealsense.com/docs/whitepapers

     

    An excellent guide to begin with when aiming to enhance your depth setup is Tuning Depth Cameras for Best Performance, followed by Camera Depth Testing Methodology.

    https://dev.intelrealsense.com/docs/tuning-depth-cameras-for-best-performance

    https://dev.intelrealsense.com/docs/camera-depth-testing-methodology

     

    3.  Tuning the camera using the guides and tools referenced above may reduce depth fluctuations.  If you require quick results then a method for minimizing fluctuation is to go to the Post Processing section of the Viewer's side-panel, expand open the Temporal Filter option and change the Filter Smooth Alpha setting from its default value of '0.4' to a smaller value of '0.1'.

     

    Left-clicking on the pencil icon beside the Filter Smooth Alpha option enables you to manually type in a value instead of using the slider.

     

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  • Nguyenduyduc14

    Thank MartyG, I will try step by step and ask later if I get into trouble.

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