Unable to Calibrate the cameras of Focus 3 with adb

[Illusion Walk]

Hi,

we re trying to calibrate the cameras of our focus 3 headsets, as they seem to be not calibrated. we re following this guide.

https://business.vive.com/us/support/vive-lbss/category_howto/calibrating-the-cameras-on-the-primary-headset.html

we re getting the message: HD : "HMD calibration file: /mnt/vendor/mfg/Final_calib_data.json, size:" so the cameras are not calibrated, but we can not get any further.

Sometimes we get an unsuspected EOF end of file, sometimes not.

however no calibration process will start.

 

Any help would be appreciated

thanks!

[VIVE_Sally]

Hi,

The process will start once the headset starts tracking, no matter the message shows up in the terminal or not. To have a better understanding of the progress of calibration, make sure the headset is nicely connected to the PC, and try the following command to show the progress:

           adb logcat | find “LIVEK”

           instead of using adb logcat -s “LIVEK adsprpc” | findstr “LIVEK doLiveK” since some PC might not be able to show the correct result from this command.

By replacing the command, you’ll see more information shown on the terminal, which should include the following, indicating the calibration process:

[doLiveK] LIVEK prepare to collect data. Please use HMD look around. Once the line appears, you can start to move the headset around to scan the environment.

[doLiveK] LIVEK good pose 100

[doLiveK] LIVEK good pose 200

[doLiveK] LIVEK good pose 300

[doLiveK] LIVEK good pose 400

[doLiveK] LIVEK good pose 500

[doLiveK] LIVEK good pose 600

[doLiveK] LIVEK pose enough. Once you saw this line, please put the headset into standby mode by pressing the headset’s power button

[LIVEK] We use new extrinsic instead of original extrinsic. This line should show up after a few minutes in standby mode.

 

Notes:

1. Make sure the headset only contains the /mnt/vendor/mfg/Final_calib_data.json file
2. The headset should be charged to at least 50% before calibrating.

The calibration process will start right after the headset turns on, so make sure to connect the headset to the PC before powering on the headset.

[Illusion Walk]

hi Sally,

thanks for your response.

Even with the adb logcat | find “LIVEK” command no data of the calibration progress will show up.

- waiting for device -
08-28 16:52:31.806  2529  2529 D LIVEK   : BOOT_COMPLETED listened
08-28 16:52:31.827  2529  2529 D LIVEK   :  batteryPct 88.0 level 88 scale 100
08-28 16:52:34.949  2529  2529 D LIVEK   :  batteryPct 87.0 level 87 scale 100
08-28 15:54:34.272  2529  2529 D LIVEK   :  batteryPct 86.0 level 86 scale 100

here is the output of adb logcat | find "‍_calib_data.json"‍

08-28 16:56:43.316  1948  2251 D HDtools : read_from_file: file name = /mnt/vendor/mfg/Final_calib_data.json
08-28 16:56:43.318  1948  2251 D HD      : HMD calibration file: /mnt/vendor/mfg/Final_calib_data.json, size: 42581
08-28 16:56:43.318  1948  2251 D HDtools : read_from_file: file name = /mnt/vendor/mfg/Final_calib_data.json
08-28 16:56:43.333  1948  2251 D HDplay  : [player_init] json: /mnt/vendor/mfg/Final_calib_data.json
08-28 16:56:45.912  3068  3068 I FeedbackConfig:   hmd_json = /mnt/vendor/mfg/Final_calib_data.json
08-28 16:56:46.720  3217  3217 D HDtools : read_from_file: file name = /mnt/vendor/mfg/Final_calib_data.json
08-28 16:56:46.721  3217  3217 D EYEjniso: HMD calibration file: /mnt/vendor/mfg/Final_calib_data.json, size: 42581
08-28 16:56:46.738  3231  3297 I LIPD    : HMD calibration file: /mnt/vendor/mfg/Final_calib_data.json, size: 42581

not sure if the calibration is really needed, or just a thing nice to have.

 

 

[VIVE_Sally]

From the result of adb logcat | find "_calib_data.json", the headset is not calibrated yet.

the possible cause of adb logcat | find "LIVEK" not having any calibration progress result might be the environment, you may try to put the headset facing a wild and well decorated environment (same requirement as LBE mode environment), so the headset could start tracking and thus do the calibration.

If the calibration process is still not working, you might have to factory reset the headset to make sure the calibration data is clean.

Camera calibration is strongly suggested when the headset is used to build the LBE tracking map, since the condition of the cameras could largely effect the quality of tracking, other headsets will still do the calibration in the background in a fixed frequency, to ensure the tracking performance.

[Illusion Walk]

so we got the cameras calibrated now.

we had to factory reset because otherwise it wouldnt work. we used the command adb logcat | find “LIVEK”

thanks for the help