Eye tracking data accompanying the paper Nyström, M., Niehorster, D.C., Andersson, R., Hessels, R.S., & Hooge, I.T.C. (submitted). *The amplitude of small eye movementes can be accurately estimated by video-based eye trackers* Note that only parts of these data were used in the paper. Please refer to the paper for details of which segments were used in the paper, and for further explanation of the variables and variable names. ################################ SECTION 2 - SIMULATIONS ################################ Column headers in file data_simulations.csv: <br> **input** - Center estimation method (gauss: Gaussian full (CoM); gauss_trunc: Gaussian truncated (CoM); tophat: Tophat (CoM); ellipse: Tophat ellipse) <br> **crsize** - size of CR in eye image <br> **noise_level** - level of image noise <br> **ref** - center location of true light distribution (pixels) <br> **est** - center located of estimated light distribution (pixels) <br> **err** - error in center estimation (pixels) <br> ################################ SECTION 3 - SIMULATIONS IN EYE TRACKING CONTEXT ################################ Relevant column headers EyeLink: <br> **TIME** - time (ms) <br> **trial** - trial number <br> **L.X** - horizontal gaze coordinate for left eye (pixels) <br> **L.Y** - vertical gaze coordinate for left eye (pixels) <br> **LPUP.X** - horizontal position of pupil center in left eye (pixels) <br> **LPUP.Y** - vertical position of pupil center in left eye (pixels) <br> **LPUP.A** - pupil area left eye (a.u) <br> **LCR.X** - horizontal position of CR center in left eye (pixels) <br> **LCR.Y** - vertical position of CR center in left eye (pixels) <br> **LCR.A** - pupil area left eye (a.u) <br> Column headers FLEX <br> **video_name** - name of video <br> **frame_no** - frame number (1000 Hz recording) <br> **pup_x** - horizontal position of pupil in eye image <br> **pup_y** - vertical position of pupil in eye image <br> **pup_area** - area (in pixels) of pupil in eye image <br> **cr1_x** - horizontal position of CR in eye image <br> **cr1_y** - vertical position of CR in eye image <br> **cr1_x_int** - horizontal position of CR in eye image (estimated from pixel intensity values of CR) <br> **cr1_y_int** - vertical position of CR in eye image (estimated from pixel intensity values of CR)<br> **cr1_area** - area (in pixels) of CR in eye image <br> **point_number** - <br> **ellipse_x** - horizontal position of ellipse fitted to pupil in eye image <br> **ellipse_y** - vertical position of ellipse fitted to pupil in eye image<br> **Ma** - major semi-axis of ellipse<br> **ma** - minor semi-axis of ellipse<br> **angle** - rotation angle of ellipse (deg) <br> **area_ellipse** - area of ellipse (pixels) <br> For ellipse parameters above, consult the openCV Python documentation for cv2.fitEllipse(). For both systems, the origo is in the upper left corner, and the positive y-direction is downwards. <br> <br> <br> **Data disclaimer, limitations and conditions of release**<br> By downloading this data set, you expressly agree to the following conditions of release and acknowledge the following disclaimers issued by the authors: **A. Conditions of Release**<br> Data are available by permission of the authors. Use of data in publications, either digital or hardcopy, must be cited as follows: Nyström, M., Niehorster, D.C., Andersson, R., Hessels, R.S., & Hooge, I.T.C. (submitted). *The amplitude of small eye movementes can be accurately estimated by video-based eye trackers* **B. Disclaimer of Liability**<br> The authors shall not be held liable for any improper or incorrect use or application of the data provided, and assume no responsibility for the use or application of the data or interpretations based on the data, or information derived from interpretation of the data. In no event shall the authors be liable for any direct, indirect or incidental damage, injury, loss, harm, illness or other damage or injury arising from the use or application of these data. This disclaimer of liability applies to any direct, indirect, incidental, exemplary, special or consequential damages or injury, even if advised of the possibility of such damage or injury, including but not limited to those caused by any failure of performance, error, omission, defect, delay in operation or transmission, computer virus, alteration, use, application, analysis or interpretation of data. **C. Disclaimer of Accuracy of Data**<br> No warranty, expressed or implied, is made regarding the accuracy, adequacy, completeness, reliability or usefulness of any data provided. These data are provided "as is." All warranties of any kind, expressed or implied, including but not limited to fitness for a particular use, freedom from computer viruses, the quality, accuracy or completeness of data or information, and that the use of such data or information will not infringe any patent, intellectual property or proprietary rights of any party, are disclaimed. The user expressly acknowledges that the data may contain some nonconformities, defects, or errors. The authors do not warrant that the data will meet the user’s needs or expectations, or that all nonconformities, defects, or errors can or will be corrected. The authors are not inviting reliance on these data, and the user should always verify actual data.