Hello. I'm Yoonmin in Korea. I bought the Pupil Invisible.

From Google Playstore The instrument is not compatible with this version. It says. My phone is Galaxy S8 and my Android version is 9. I can't install the Pupil Invisible Companion App.

How can I solve this problem?

😂

HI I've recently bought Pupil Invisible. I've got my campion device and glasses all working and everything seems fine. I'll be using the glasses with at least 15 different wearers a day. Is there anywhere I can find instructions on best practise routines for calibrating each wearer efficiently, and how I can quickly find out how well each wearer has calibrated etc? I can't find this in the companion app anywhere. Many Thanks

@user-3b7325 Pupil Invisible comes with a One Plus 6 companion phone. This is the only phone that is supported by our app.

@user-bdf59c the glasses are mostly calibration free. For some rare cases you can add an offset. Check out the instructions in the wearer profile.

The realtime preview will allow you to asses the gaze estimation accuracy in a qualitative manner.

@mpk thank you. Is there any estimate of what percentage of people should return good quality data. For example if I wanted to do quantitative research with the equipment, should I be over recruiting and by how much?

@user-bdf59c The glasses do work robustly on almost all subjects (95+%). For the about 10-15% of subjects, whose physiological eye parameters are furthest away from the population average, it will be necessary to use the offset calibration to compensate for the error they initially show. With the offset calibration they should however be usable. Thus the percentage of subjects that has to be discarded due to failure of the eye tracking technology is expected to be very small. We plan to publish a more thorough report on this soon!

Hi, I'm considering purchasing the Pupil invisible classes. I had a lot of trouble with the app for the core glasses a year ago where most of my files were corrupted when I transferred them to my computer. We never figured out what the problem was, if it was something we were doing or the app. Everything was fine once connected to a computer to colelct data. It's making us hesitant to buy another Pupil Labs product that relies on an app though. Does this really work consistently? Also, would the data I get with the invisible glasses be something I could compare to the data I got with the core?

@user-072005 I am sorry to hear that you had so much trouble with the Pupil Mobile app, which has often been a bit unstable. The Pupil Invisible Companion app was however re-implemented from scratch and I can assure you that it is worlds more stable! The Companion app is a neccessary tool to work with Pupil Invisible and we are committed to making sure it works robustly!

That's good to hear. When the data from the invisible are put into player, does it come out then in the same way as the recordings from a core eye tracker? I ultimately want to compare data I got last year with the Core glasses (which have now broken) with data I collect this year with whatever new glasses we go for.

@user-072005 Yes, you can use Pupil Player to export recordings made with Pupil Invisible to CSV files similar to how you can do it with Pupil Core recordings. Recordings made with Pupil Invisible will be missing pupilometry data, but besides that it's the same.

Ah the pupilometry data is important to consider whether I can lose that. They say they work in the sun? Is there a difference in the rate of gaze detection from an indoor lighting situation to a bright day? I collect data with people cycling in a climate that's never cloudy, so that could be a game changer

@user-072005 We are looking into adding pupilometry to Pupil Invisible, but that is still WIP with no set release date. Pupil Invisible works equally well outdoors and indoors and we indeed also hope that this is a game changer 😊

Interesting, ok. One last question for now, it says they work with +8/-8 diopter but I didn't see extra lenses listed in the included products. Would I need to purchase the prescription lenses in the accessories section to have people who would normally need glasses participate?

@user-072005 Prescription lenses are not included by default. If you want to have prescription lenses available for a wide variety of subjects you can buy the lense kit we offer. If you have fewer or returning subjects, you could also get custom lenses from any optrician. We use a standard glasses design that allows any optrician to fit glasses for Pupil Invisible.

Actually, one last question. The accessories kit says +/-3, so the maximum is +/-3, not 8?

Oh I think I'm getting it, I could purchase from an optrician above 3

The default lense kit we offer includes up to +/-3, but it is possible to fit up to +/-8 into the frame without obstructing the eye cameras. If you would like to get a lens kit that has a different range than +/-3, we can also configure a custom set for you if you contact [email removed]

Getting any of these values from an optrician would also work!

Great, thanks for all your help

Your welcome! 👍

Hi all, @papr just recommended the pupil invisible for outdoor use-cases given than the pupil core IR sensors are becoming over exposed in some of our sunny research settings. I see that Invisible doesn't require any calibration, but I was curious whether this systems accuracy has been quantified relative to other systems. I'm primarily interested in using the wearable eye tracking to see what people are looking at as they navigate hallways and outdoor spaces (signs and posters on the wall, outdoor signs etc.). I'm planning to do some Area of Interest based analyses for the various "landmarks" throughout these spaces. I've looked through the website, but can't find any information on accuracy of the Invisible system vs Pupil Core or other similar wearable eye tracking systems. Thank you for your time and help!

Hi, I have a quick question. I want to cite the Invisible tracker but since there isn't a paper on it, should I just cite the Pupil paper from 2014? Or should I put the Pupil-labs Url (https://pupil-labs.com/products/invisible/ )? Please let me know. The paper is due EXTREMELY SOON! Thank you!

@user-df9629 we plan to release a white-paper. For lack of better source, please use the url you suggested for now.

@mpk , Thank you, will do so!

@user-c6717a the white paper mentioned above will also quantify the accuracy thoroughly. There do not exist 3rd party evaluations yet as far as we know. Until the white paper is released, a short qualitative summary is as follows: 1) If you can provide perfect lab conditions, e.g. good calibration, controlled lighting and little subject movement, then the accuray of Pupil Core or other tradtional eye trackers will be a bit better. 2) In more naturalistic conditions, the performance of Pupil Invisible should be on par or better. 3) In challenging conditions (e.g. outdoors or with a lot of subject movement) the performance of Pupil Invisible does not degrade, while other eye trackers are typically not usable.

Since your use case contains outdoor environments and some level of subject movement, I agree with @papr that Pupil Invisible should be a good fit.

Hi all, I have a quick question. Is there any way to get the recording time (e.g., 2020/02/10, 19:00:00) instead of timestamp? We want to retrieve the system time when you record data based on the measuring smartphone time in order to synchronize the pupil data with the other data taken with other devices. Thanks in advance!

@user-a9ff0d The timestamp unit is nanoseconds since Unix epoch. You can use this Python function to convert the recorded timestamps to datetime objects of your local system time: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.to_datetime.html

@papr Thanks a lot for your very quick reaction!

Just a PSA on the combination of Pupil Invisible Companion + Invisible Monitor + Wireless HDMI:

When we'd used the Pupil Invisible and grabbed the live transmission with the Invisible Monitor, the transmission would be unwatchable once we brought a wireless HDMI-transmission into the mix. We are talking heavy artifacting, several second-long delays and general shoddiness of the transmission. We would see mostly stills, never a fluid picture. We are using a mobile TPLink Access Point M7200 providing a dedicated WiFi-network for the live transmission of the Pupil Invisible picture from the OnePlus 6 to a Microsoft Surface. The difficulties arise no matter the distance between the components. I am not saying this is due to anything by Pupil, just a heads-up for the community that this use case seems non-feasible. Keep in mind that the Access Point only delivers 2.4GHz.

@user-ea78b7 Thank you for sharing your experiences with us! I have a follow up question regarding your setup. Where does the wireless hdmi monitor come into mix? Does it mirror/extend the Microsoft Surface, or is it connected to a different device?

I agree that this limitation is likely due to the limited bandwidth of the 2.4GHz wifi. You might have more success with a 5GHz network.

Where does the wireless hdmi monitor come into mix? Does it mirror/extend the Microsoft Surface, or is it connected to a different device? @papr We had both cases and encountered the same problems in both of them.

By the way, without the Wireless-HDMI, we were able to keep a distance of about 30 metres between Surface and AP and AP and OnePlus 6.

Does pupil invisible supports Hololens 2?

@user-7aee47 with support you mean wearing a Hololense 2 and a Pupil Invisible in parallel on the same person? We have not explicitly tried that, but my guess would be that this is not possible, as there is probably not sufficient space "inside" of the Hololens.

thank you @marc

@user-7aee47 Actually it seems like some people are able to use regular glasses under their Hololense, so I think I have to change my assesment to "We don't know, it might work".

My research is based on eye tracking. Hololens 2 is capable of eyetracking but there is no traces for utilizing the IR cameras mounted near the nose bridge because of that I'm trying some alternate solutions to fit in the Hololens to track the pupil movement

@user-7aee47 We do currently not have a Hololense 2 in our office, so I can not try this out for you. However Pupil Invisible is just a little bit thicker than your average pair of glasses (of the same full frame style). Thus, if you can try to use the Hololens with such a pair of regular glasses, this should inform you about Pupil Invisible as well. We also offer a 30-day money back guarantee, so if you wanted to try with the original you could also do that and send it back if it does not fit.

@marc I wanted to be like this but the image shown is for Hololens v1

I see. This is using our Hololens 1 add-on. As far as I know, we were not able to try if it is compatible with the Hololens 2 yet.

@user-7aee47 I will ask around on the team, if anybody has heard of usage of our tools with the Hololens 2 yet, but I think also with the add-on all we can offer is for you to try if it is compatible and to send it back otherwise. I don't think we can get our hands on a Hololens 2 any time soon to try it out ourselves.

@marc Thank you so much for your quick response

You are welcome @user-7aee47 !

I'm hoping to get a positive feedback from your side @marc

@user-7aee47 I am afraid I did not get any positive feedback from the rest of the team. We have not yet heard of somebody trying to use our tools together with the Hololens 2.

HI, I was wondering whether pupils insivible is under patent protection (for therapeutic use)? I need to know this information for a trial application.

@user-16d117 I m not sure I can follow. Can you explain the issue a bit more?

Is the trial drug or the therapeutic, diagnostic or prognostic procedure that is the object of this trial under patent protection?

0 Yes, until (date): 0 No

If yes, please specify.

This is the question, I need to answer - I was not sure what applies in case of pupils invisible (which I would like to use / aplpy funding for)

The way this is phrased, as far as I understand, the question does not relate to Pupil Invisible but rather how it is used (procedure, not tool).

ah ok! thank you! then I will deny it.

Hi, I was trying to load the PI recorded folder by using pupil player, and I noticed that the loaded video does not have audio. I enabled the audio recording option when I was recording the video and the video on the phone do have audio. Is there a way to export the PI recorded video with audio by using pupil player?

@user-fd5a69 Are you using Pupil Player v1.21? And can you hear the audio when you play back the world video file in a normal media player?

I was using an old version of pupil player. I'll try it on the new version of Pupil player.

In this it is expected that there is no audio playback. Support for PI audio recordings has been added in Pupil v1.21 🙂

I tried the new version and it worked. Thank you!

Hello, we noticed that in your terms of service you say you provide a "Wearer Training Service" that can improve gaze detection accuracy. How can I access this service?

@user-ba6b85 there is an offset correction routine that you can perform per wearer using the Pupil Invisible Companion app. Click on the wearer profile and click "Adjust" in the Gaze offset correction section. Notes on offset correction were posted by @marc earlier in the chat

The glasses do work robustly on almost all subjects (95+%). For the about 10-15% of subjects, whose physiological eye parameters are furthest away from the population average, it will be necessary to use the offset calibration to compensate for the error they initially show. With the offset calibration they should however be usable. Thus the percentage of subjects that has to be discarded due to failure of the eye tracking technology is expected to be very small. We plan to publish a more thorough report on this soon!

Hi. Does the companion app require access to the internet in order to perform real-time eye tracking?

@user-a0187d Hi, no it does not. 🙂

Hey all, I want to use zyre messaging to communicate with the Invisible Companion App. I am running experiments in a university network and for some reasons no communication to the App can be established. Do you know the issue?

@user-95fc4d University networks tend to block direct communication between computers for security reasons. I recommend to setup a dedicated wireless local network for your experiment. This also the best way to avoid any network related interferences from other network users.

@papr thank you very much! We will try the local network alternative 🙂

Hi we have a problem after installing Invisible Companion on the phone that was shipped with the glasses no image is shown at all. Does anybody has a clue?

@user-521438 Could you provide a few more details? 1) Do you mean no scene images are shown when you select the preview? Do you see a gray screen instead? 2) Can you confirm that you have enabled OTG (USB-On-The-Go) on the phone? 3) Do you see the gaze point visualization (red circle)?

1) No scene images are shown just two circles with a camera icon and a pupil icon

2) OTG is enabled

3) No gaze point visible

It seems it doesn't detect the glasses at all

In Info no Serial number is shown

@user-521438 Ok, thanks for the info! This sounds like you are currently looking at the home screen of the app. The two circles with camera and eye icons, are they gray or colored?

Gray

Ok, that does indeed mean, that the cameras are not connected to the app.

I have checked the cables

I think it is externally powered by the Phone?

Yes, the power for the glasses comes from the phone

Can I try to connect with a laptop? To check if there is a connection?

@user-521438 Yes you could do that if you have a USB-C to USB-A cable at hand.

The inner ring with the eye gaze responded for one minute

Ok, that sounds like there might a hardware issue. If you connect your glasses to a laptop and open our software Pupil Capture, you should be able to open the cameras with it.

I connected it with my laptop can I find it under Hardware?

Ok I'll try

You can download the software here: https://github.com/pupil-labs/pupil/releases

@user-521438 Please note that the setup would be slightly involved if you are using a machine with Windows. If you have trouble testing this with Pupil Capture please reach out to [email removed] to schedule a video support session!

We have Core in use. I opened Pupil Capture. Now my Computer says: you USB device caused an error, Windows doesn't recognize the device anymore

Ok, so you are using Windows. In this case please schedule a video support session with us!

Ok how can I schedule a session? I am new to this

I will send you instructions in a direct message!

Thanks a lot!

@papr we have created a local network now without connection to the internet. We have tried connecting the companion app with the pupil monitor again and still get no connection. Could I send you the pi_monitor.log file and you'll have a look at it? Best regards, Toni

@user-95fc4d Of course, this would be helpful for the diagnosis of the issue.

Cool. I already sent the email around 10:30. Thanks a lot!

@user-95fc4d Indeed! Let me have a look at it and I will follow up via email.