⇤ ← Revision 1 as of 2009-10-02 05:54:30
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← Revision 2 as of 2009-10-02 06:00:08 ⇥
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= prob = | = the eyetracker calibration is not working = |
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* first of all, start nrec in a terminal window and check for error messages in the output: right-click on the desktop background, choose "execute command..." or "Befehl ausführen...". Type {{{ konsole }}} and press Enter. A terminal window appears. Click inside this window, type "./start" and press Enter. Carefully check, if there are any error messages in the output by scrolling up and down in the terminal window. * If an error with the message "Wrong subdevice type." appears, it is very likely, that the nrec configuration file has been corrupted. To resolve this issue, you first have to become super-user (Administrator) by typing {{{ sux }}} and pressing Enter in the terminal window. Type in the administrator password (you can try "nrec"). Now the input prompt should display a "#" sign at the rightmost end. Now it is time to enter the standard working directory. Find it out by typing {{{ cat start }}} (pressing Enter is now always necessary after typing). You may find displayed something like {{{ cd saccades && nr }}} Now change to this directory (in the example: "saccades") by typing: {{{ cd saccades }}} Show all the recent configuration file backups by typing {{{ ls -a .nrec* }}} Choose one from a point of time, when nrec was correctly starting up (maybe yesterday?) and copy it to the current configuration file: {{{ cp .nrec2008-11-11-11-11-11-111.cfg .nrec.cfg }}} That's all. Now you can close the terminal window and ty to start nrec again. |
* First of all, check if the eyetracker produces a correct signal: * Video eyetracker: * Is the image of good quality? * Is the eyetracker software able to fit the pupil correctly? * Do you see an eye position trace for all relevant gaze directions? * Is the voltage of the adjusted eye, produced by the eyetracker, connected to the eye X/Y connectors of the nrec data acquisition box? * Is nrec getting any valid data? Try to activate "raw data" below the eye position panel to display the acquired voltages. * Did you select the menu entry {{{nrec - reset calibration}}} before starting the calibration experiment? |
the eyetracker calibration is not working
- First of all, check if the eyetracker produces a correct signal:
- Video eyetracker:
- Is the image of good quality?
- Is the eyetracker software able to fit the pupil correctly?
- Do you see an eye position trace for all relevant gaze directions?
- Video eyetracker:
- Is the voltage of the adjusted eye, produced by the eyetracker, connected to the eye X/Y connectors of the nrec data acquisition box?
- Is nrec getting any valid data? Try to activate "raw data" below the eye position panel to display the acquired voltages.
Did you select the menu entry nrec - reset calibration before starting the calibration experiment?