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Camera calibration

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  • kestrelsystemsbpK Offline
    kestrelsystemsbpK Offline
    kestrelsystemsbp
    wrote on last edited by
    #1

    We want to use AprilTags to perform precise landings on our Starling 2, but from what we have read the cameras need to be calibrated to utilize this functionality. When running "voxl-calibrate-camera tracking_front" is says that we need to use the portal, but the portal is extremely unstable and crashes almost immediately. Therefore we are wondering if it is possible to calibrate the cameras without the portal?

    Alex KushleyevA 1 Reply Last reply
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    • kestrelsystemsbpK kestrelsystemsbp

      We want to use AprilTags to perform precise landings on our Starling 2, but from what we have read the cameras need to be calibrated to utilize this functionality. When running "voxl-calibrate-camera tracking_front" is says that we need to use the portal, but the portal is extremely unstable and crashes almost immediately. Therefore we are wondering if it is possible to calibrate the cameras without the portal?

      Alex KushleyevA Offline
      Alex KushleyevA Offline
      Alex Kushleyev
      ModalAI Team
      wrote on last edited by
      #2

      @kestrelsystemsbp , yes, alternate calibration methods are possible. Do you have a preferred method / software that you would like to use?

      Also, which camera are you trying to calibrate and what resolution?

      Alex

      kestrelsystemsbpK 1 Reply Last reply
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      • Alex KushleyevA Alex Kushleyev

        @kestrelsystemsbp , yes, alternate calibration methods are possible. Do you have a preferred method / software that you would like to use?

        Also, which camera are you trying to calibrate and what resolution?

        Alex

        kestrelsystemsbpK Offline
        kestrelsystemsbpK Offline
        kestrelsystemsbp
        wrote on last edited by
        #3

        @Alex-Kushleyev
        We have not really tried any sort of camera calibration before so there are no preferred methods, but I suppose the easier the better.

        We want to calibrate the IMX412 mounted underneath the drone. I believe 4k is not necessary for AprilTag detection, so 1080p is sufficient.

        Alex KushleyevA 1 Reply Last reply
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        • kestrelsystemsbpK kestrelsystemsbp

          @Alex-Kushleyev
          We have not really tried any sort of camera calibration before so there are no preferred methods, but I suppose the easier the better.

          We want to calibrate the IMX412 mounted underneath the drone. I believe 4k is not necessary for AprilTag detection, so 1080p is sufficient.

          Alex KushleyevA Offline
          Alex KushleyevA Offline
          Alex Kushleyev
          ModalAI Team
          wrote on last edited by
          #4

          @kestrelsystemsbp ,

          Thank for clarifying. Indeed the camera-calibration app does not work well for high resolution camera calibration because the processing is not optimized for the large image size (takes too long to process a frame).

          The workaround for now is to use down-scaled image for calibration. I will follow up with instructions for the easiest way to do this.

          Alex

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