[Gaze origin bug in GetGazeRay of Unity package]

@Hank_Li @Corvus  Hi Hank, you mentioned above that the bug will be fixed in the next sdk version. I downloaded the 1_3_3 sdk and I want to be sure that the bug in the GetGazeray function was fixed. Was it fixed? Is it still necessary to multiple x values in minus 1? 

Waiting for your answer, Thanks! 

[Eye Tracking SDK Features scale]

Hi  @Corvus,

I am trying to understand the meaning and proper range of some of the basic variables.

in the folder is called 'Document_Unity" You mentioned, there is some information but not the whole range I can get and not the meaning of any value.

 

For example: validata_bit_mask

EyeLine += eyeData.verbose_data.left.eye_data_validata_bit_mask.ToString() + ",";
What is the possible range of this variable?

What does the value   = 31 mean?

I tried to check it out in an empty scene, with one eye open and one eye closed. When I exported data to CSV file I got the value = 24 in the close eye (orange arrow)
As you can see in the attached files and -1 in the diameter size variable. How does it make sense that I still get information about the location of x ,y  with one eye completely closed? (blue arrow) 

Waiting for an answer from you, hope it arrives soon because I can not progress in my work until I solve it.

thank you for your help.

Tchiya

[raw data meaning (Eye Tracking SDK Features scale)]

@CorvusOk, I was able to get to the file you were talking about.
But I still lack information on some variables.

For example: validata_bit_mask

EyeLine += eyeData.verbose_data.left.eye_data_validata_bit_mask.ToString() + ",";

What is the possible range of this variable?

What does the value   = 31 mean?

I tried to check it out in an empty scene, both with full eye closing and full opening. When I exported data to CSV file I got the value = 31 in both cases.
As you can see in the attached table. How does it make sense that I still get information about the size of the pupil and its location with eyes completely closed?

thank you for your help.

Tchiya

 

 

 

 

[raw data meaning (Eye Tracking SDK Features scale)]

@Corvus

I'm sorry,
Still can't get to this file.

Can you please send it to me via email?
birbira98@gmail.com

[raw data meaning (Eye Tracking SDK Features scale)]

and one more thing, how could I transform the pupil_position_in_sensor_area (or any other parameter) into the angle between the eye and the head (or lens) in degrees?

[raw data meaning (Eye Tracking SDK Features scale)]

Thanks for your response,
I have a few more questions:

1. The Eye Tracking SDK documentation is included with the SDK download - can you give an exact location? I could not find them in the folder.
(This is an empty folder =C: \ Users \ tchiyab.PC-4D17510A \ Downloads \ Do Not Delete - Installations \ SRanipal_SDK_1.1.0.1.zip \ SRanipal_SDK_1.1.0.1 \ 02_Unity \ Document \ Eye \ html \ search)

2. I have seen that competing devices report about
 " Access to eye position data with 3.0 msec delay".
What is the daily in the case of SRanipal SDK?

3. The pupil - I know what it looks like and it is clear to me that it is not size 0 at any moment 😃
This is just an example of something I do not understand about RAW DATA values.
I expect that when there is a blink the Eye Tracking will "lose" the tracking of the pupil and report NAN or 0. I saw in me that there are consecutive samples with numbers between 2-5 so I asked if the information I get goes through some MASK that fills such holes or is it really RAW DATA?

Thank you for your patience

Tchiya

[raw data meaning (Eye Tracking SDK Features scale)]

It's so nice to get such a quick and detailed answer,
Thanks Kapara.

Just one more little question for now,
It seems I have no blinks in my DATA.
In the variable pupil_diameter_mm  for example, there is no number smaller than 0.2.
I expected to see at least part of  it =NAN or 0.

Could it be that the numbers are slipping? Could there be another function that run before I get the data ?

 

[raw data meaning (Eye Tracking SDK Features scale)]

Hello,

I have some questions, I would be really glad if you could help me :

1. I'm doing an experiment using HTC PRO EYE and Unity and I am looking for a "glossary of term" that will help me understand the meaning of each variable, and the scale of possible values.
Can you refer me to a relevant link?
(For example for variables: Pupil Position,  Pupil Diameter, validation)

2. I am looking for a variable that will return information about the confidence level of the pupil recognition. I thought that - .eye_data_validata_bit_mask Will help me, but it gives me a constant result of = 31.
Can you help me understand this better - I have a problem identifying the variable or saving the data?

3. Is there a way to display in Unity real time information about eye movements (E.g. ray, Heatmaps) without it being displayed to the player? but only on the main computer?

Thanks,

Tchiya