40 lines
3.2 KiB
Markdown
40 lines
3.2 KiB
Markdown
---
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id: eye-gaze-directionality
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title: Eye Gaze Directionality
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---
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Eye gaze directionality is another output we get from OpenFace. The variables below allow for measurements of eye gaze behavior.
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### Raw Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `mov_lefteyex` | x coordinate of the left eye at the current video frame. |
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| `mov_lefteyey` | y coordinate of the left eye at the current video frame. |
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| `mov_lefteyez` | z coordinate of the left eye at the current video frame. |
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| `mov_righteyex` | x coordinate of the right eye at the current video frame. |
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| `mov_righteyey` | y coordinate of the right eye at the current video frame. |
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| `mov_righteyez` | z coordinate of the right eye at the current video frame. |
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| `mov_leyedisp` | **Euclidean displacement in the left eye gaze** at the current video frame; this tells the overall movement in eye gaze direction in each frame. |
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| `mov_reyedisp` | **Euclidean displacement in the right eye gaze** at the current video frame; this tells the overall movement in eye gaze direction in each frame. |
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### Derived Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `mov_lefteyex_mean` | **Mean x coordinate of the left eye** i.e. the average of the vector `mov_lefteyex`. |
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| `mov_lefteyex_std` | **Standard deviation of x coordinate of the left eye** i.e. the standard deviation of the vector `mov_lefteyex`. |
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| `mov_lefteyey_mean` | **Mean y coordinate of the left eye** i.e. the average of the vector `mov_lefteyey`. |
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| `mov_lefteyey_std` | **Standard deviation of y coordinate of the left eye** i.e. the standard deviation of the vector `mov_lefteyey`. |
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| `mov_lefteyez_mean` | **Mean z coordinate of the left eye** i.e. the average of the vector `mov_lefteyez`. |
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| `mov_lefteyez_std` | **Standard deviation of z coordinate of the left eye** i.e. the standard deviation of the vector `mov_lefteyez`. |
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| `mov_righteyex_mean` | **Mean x coordinate of the right eye** i.e. the average of the vector `mov_righteyex`. |
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| `mov_righteyex_std` | **Standard deviation of x coordinate of the right eye** i.e. the standard deviation of the vector `mov_righteyex`. |
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| `mov_righteyey_mean` | **Mean y coordinate of the right eye** i.e. the average of the vector `mov_righteyey`. |
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| `mov_righteyey_std` | **Standard deviation of y coordinate of the right eye** i.e. the standard deviation of the vector `mov_righteyey`. |
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| `mov_righteyez_mean` | **Mean z coordinate of the right eye** i.e. the average of the vector `mov_righteyez`. |
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| `mov_righteyez_std` | **Standard deviation of z coordinate of the right eye** i.e. the standard deviation of the vector `mov_righteyez`. |
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| `mov_leyedisp_mean` | **Mean euclidean displacement in the left eye gaze** over the course of the video. |
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| `mov_leyedisp_std` | **Standard deviation of euclidean displacement in the left eye gaze** over the course of the video. |
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| `mov_reyedisp_mean` | **Mean euclidean displacement in the right eye gaze** over the course of the video. |
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| `mov_reyedisp_std` | **Standard deviation of euclidean displacement in the right eye gaze** over the course of the video. | |