Hi, what are the desinfection/sterilisation procedure and/or products for the Invisible? We have a research protocol ready for use with hospital staff. But it's use need to be COVID-19-proof. So we need to desinfect it after each user. But we don't want to damage the electronics or blur the screens & camera.

@user-e8f45a Hey, checkout this part of the documentation: https://docs.pupil-labs.com/invisible/hardware/#care-instructions

Thanks for the swift reply! Will take a look at it.

The frame can be desinfected. It is the glasses I worry about. Cleaning with microfiber cloth doesn't equal desinfection. Do the glasses themselves have any function for recording? Or can the invisible be used without glasses?

@user-e8f45a You can use Pupil Invisible without lenses if you want to. 🙂 I think you can apply the disinfectant on the lenses, too. @user-755e9e can you confirm this?

@user-e8f45a I would recommend to either use disinfectant wipes or spray the liquid on a wipe and not directly on the glasses.

@user-755e9e Thanks for the correction 👍

Excellent! It is hard these days to get acces to a hospital as a researcher...

hello

are there plans to make the code from invisible that doesn't require initial calibration also available for the vive addon?

Hey @user-01c362! No, we do not plan to make the Pupil Invisible pipeline compatible with the the Vive Addons right now. The two are technologically quite different and not easy to make compatible on an algorithmic level.

Thanks @marc . What about future VR addons (not Vive)?

@user-01c362 That may happen at some point using the Pupil Invisible technology, but currently no such project is on the roadmap.

@marc Sounds like it's more of an optical work to be done then. I can wait but is the code for Pupil Invisible on Github? We could try making an unofficial port until then.

@user-01c362 The code for Pupil Invisible is not open-source. 3rd party software can be fully integrated with Pupil Invisible (see e.g. the open-source Pupil Invisible Monitor app), but you will still be bound to the original Pupil Invisible hardware. The camera setup in Pupil Invisible is critical for the algorithm to work, so porting it to different hardware would not really be possible. I am afraid for the moment you will have to cope with the calibration requirement of VR eye tracking solutions.

Hi, can windshield heating (hot-wires) in vehicles affect the scene camera attached to the glasses?

please what is this error about

@user-7e517e I'm not sure I understand your question. What do you mean by "windshield heating in vehicles"?

@user-7daa32 this seems like a question for 👁 core channel

@wrp, what I mean is the hot-wires, or some kind of build-in heating ,of the windshield/windscreen. Whether this affects the scene camera, making the video "short-sighted".

@user-7daa32 this seems like a question for 👁 core channel Yes @wrp

@user-7e517e the camera is fixed focus, the only thing I would be able to think of is auto exposure. Can you share a sample video?

Hi, I work in an ergonomic lab and would like to know if there is any way(s) to try the pupil before buying it?

@user-db0d22 Please contact info@pupil-labs.com in this regard.

@papr Thanks for the quick reply!

Hey guys :) Is it possible to get the pupil size (diameter/radius in millimeters) by utilizing the PupilInvisible? Do I need to do some postprocessing with the PupilPlayer?

Hey @user-fb5b59! Unfortunately pupil size data is currently not available with Pupil Invisible. It is something we are working on, but given the camera angles it is a difficult problem and we do not have an expected release date for this. For now only Pupil Core can generate pupil size estimates.

Yes, I thought it would be this way. Maybe I will try to get some data from the Pupil Core Thanks Marc!

What about the performance paper of the PupilInvisible?

@user-fb5b59 We are really almost done with the white paper now and expect to release it still this month!

Nice, great work!

Thanks! We'll make sure to drop a notification in this channel once it is available!

@mpk, I haven't tested Pupil Invisible in vehicles with windshield heating, but wondered if someone had experiences in this regard. It seems to be a challenge for some dashcams, but these are normally much closer to the windshield, if that makes a difference.

@user-7e517e I think it should not be an issue, we don't use autofocus and the scene camera is further away from the window compared to a dash cam.

Hi, I'm wondering if Pupil Invisible is UVC compatible so that I can connect it with PC? If so, what about reading IMU and MIC data through USB connection? I develop something based on Pupil and it works well with Pupil Core. I want to use it with Pupil Invisible.

@user-699cbb Hey 👋 The cameras are UVC compatible and the microphone should be picked up by your operating system automatically. Unfortunately, accessing the IMU requires custom software which we do not provide.

@user-699cbb I would like to add a disclaimer that the angle of the eye cameras in the Pupil Invisible glasses are not suitable for Pupil Core pupil detection/gaze mapping.

@papr Oh good. It means I can use UVC backend to read data from Invisible and do real time gaze mapping at 200Hz with a well estimated intrinsic/extrinsic matrix for Invisible Camera?

@user-699cbb You can use the UVC backend in Pupil capture to read images at 200Hz, yes. Pupil Capture will not be able to do pupil detection/gaze mapping based on these eye images though.

@papr I dont understand. We use github.com/pupil-labs/pupil-detector to detect pupil from eye images, right? What do you mean by not suitable? Thanks.

@user-699cbb

the angle of the eye cameras in the Pupil Invisible glasses are not suitable for Pupil Core pupil detection/gaze mapping. I added a screenshot of the eye images. As you can see, the camera placement is very lateral which results in the pupil not being detectable reliably.

Ah, I see. Cameras are placed to the corner of the glasses frame.

Hi, we plan to use multiple Pupil invisible glasses in an on-road study of truck drivers. Estimated recording times exceed the One Plus 6 run time. Is switching between multiple recording units the only way to handle approx. continuous recordings? Is it possible to install the Pupil Invisible Companion app on any One Plus 6 phone with Android 8-9?

@user-7e517e Switching to a fresh device is the recommended and the only way to extend the recording time. You can use any OnePlus 6 device, however it has to run Android 8 or 9 (version 8 is pre-installed on newly bought OnePlus 6 devices and we recommend using that for the highest stability). Android 10 contains a USB bug that makes it impossible to interface with the Pupil Invisible cameras (this will eventually be fixed in Android 11).

@marc Thanks!

Hi all, I've been having an issue with one of my invisibles, where one of the eye images seems to have disappeared along with fixation estimates. Any help navigating this issue would be most appreciated.

@user-7192ac Do you have an example recording that you could share with us?

Sure, I have both a really short one and a longer one. Which would you prefer, and how should I share it?

I think the short will do at first

Exported video, or folder with raw files?

The folder with raw files please

If it is too large to upload it here, share it with data@pupil-labs.com and we will come back to you via email

Yeah, just got that warning, I'll share it with that email.