From 977ee2c06cfc1e02358976ad8bdd92b5cfdab8f2 Mon Sep 17 00:00:00 2001
From: Xucong Zhang <xczhang@mpi-inf.mpg.de>
Date: Mon, 28 Jan 2019 13:41:52 +0100
Subject: [PATCH] Created Output format (markdown)

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+You can optionally output the estimated information to a .csv file. We intended to have similar output data with [Pupil Labs](https://docs.pupil-labs.com/).
+
+## CSV file
+The content of output .csv file are following:<br/>
+* `timestamp` - timestamp of the source image frame<br/>
+* `index` - frame number of input video or camera<br/>
+* `face_id` - face identification generated by OpenFace with tracking<br/>
+* `confidence` - face and facial landmark detection certainty ranges from `-1` to `1`, provided by OpenFace. A value of `-1` indicates no confidence. `1` indicates perfect confidence.<br/>
+* `gaze_2d_x` - x position in the estimated gaze in normalized coordinates. The coordinate is based on the screen such that the origin `(0,0)` is the **top left** and `(1,1)` is the **bottom right**<br/>
+* `gaze_2d_y` - y position in the estimated gaze in normalized coordinates. The coordinate system is the same as for `norm_pose_y`<br/>
+* `face_center_3d_x` - x center of face in the camera coordinate system<br/>
+* `face_center_3d_y` - y center of face in the camera coordinate system<br/>
+* `face_center_3d_z` - z center of face in the camera coordinate system<br/>
+* `gaze_3d_x` - x position of the 3D gaze direction vector in the camera coordinate system<br/>
+* `gaze_3d_y` - y position of the 3D gaze direction vector in the camera coordinate system<br/>
+* `gaze_3d_z` - z position of the 3D gaze direction vector in the camera coordinate system<br/>
+* `left_eye_3d_x` - x center of left eye in the camera coordinate system<br/>
+* `left_eye_3d_y` - y center of left eye in the camera coordinate system<br/>
+* `left_eye_3d_z` - z center of left eye in the camera coordinate system<br/>
+* `right_eye_3d_x` - x center of right eye in the camera coordinate system<br/>
+* `right_eye_3d_y` - y center of right eye in the camera coordinate system<br/>
+* `right_eye_3d_z` - z center of right eye in the camera coordinate system<br/>