Home Forums Feature Requests feat A new Calibration setup


This topic contains 4 replies, has 4 voices, and was last updated by Profile photo of Grant [Tobii] Grant [Tobii] 1 month, 3 weeks ago.

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  • #7244
    Profile photo of JD

    First I would like to say hi to everyone and let you know I like the Tobii 4C but am having some issues resulting from the Calibration Setup.

    I think a great idea would be to have a new way or an optional way to Calibrate the Tobii EyeX / Tobii 4C by looking at a Set of Blue Dot’s, around Twenty of them and clicking on another Twenty Green Dot’s ( Which represent your gaze point ) with your mouse and Dragging them over the top of the Blue Dot to allow a more precise Calibration. I have found that no matter how many times I run the Calibration setup trying to improve it, it never gets the calibration accuracy where I am satisfied.

    The gaze is either too high or too low above the target I’m looking at.
    Below is what I mean…

    Mouse / Gaze position here —> x
    Looking here—> O
    Looking here—> O
    Mouse / Gaze position here —> x

    There has to be a better way to get a more precise Calibration then just looking at 3 dots till they explode and again on second part its just not accurate enough….

    Maybe add more exploding Dot’s to watch while they explode or have another way to manually adjust the calibration to further increase its accuracy.

    Something like an X and Y adjustment by clicking on buttons that moves the Gaze area by .001 or so each click or inputting numbers to get a more desired result from Calibrating and make it more accurate.

    Thank you very much for your patience on this post.

    P.S. Really looking forward to any update to your software to make Calibration Better! =)

    Profile photo of Grant [Tobii]
    Grant [Tobii]

    Hi @grave, thank you for your suggestion.

    The calibration procedure chosen by Tobii has been carefully selected to represent the best possible balance between speed and quality. For the majority of users, our existing paradigm functions well but unfortunately for a small percent of the population, 3 calibration spots may not be enough.

    In any event, I have created a feature request based upon your feedback for the developers to review and possibly implement in a future release.

    Profile photo of Alex [Tobii]
    Alex [Tobii]


    Could you please record a video with your test calibration screen. If the blue circle is somewhat inside the white circle when you look at the middle of the white circle, then calibration is considered to be good.

    Could you also take a photo of you monitor’s lower bezel. If it’s not flat and parallel the screen surface (some monitors have 15-30 deg inclination) then you might get problems with calibration.


    Hai this sounds like what i’m trying to do.
    But Rather a Grid of Points.

    Profile photo of Grant [Tobii]
    Grant [Tobii]

    Hi @superseani2, it is possible within your own bespoke SDK applications to customise calibration parameters such as multiple calibration points (up to 9). Doing so requires the use of the Tobii Core SDK Stream Engine API for which you can find more information @ http://developer.tobii.com/tobii-core-sdk/#streamheader

    However, the calibration process via the Tobii Core Software running in the system tray does not expose the kind of calibration customisation you are seeking. In any event, I hope the above information is of use to you!

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