/usr/share/psychtoolbox-3/PsychAlpha/OpenEyesDemo.m is in psychtoolbox-3-common 3.0.11.20131230.dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 | function OpenEyesDemo
AssertOpenGL;
KbName('UnifyKeyNames');
leftArrow = KbName('LeftArrow');
rightArrow = KbName('RightArrow');
upArrow = KbName('UpArrow');
downArrow = KbName('DownArrow');
rightGUI = KbName('rightGUI');
rightShiftKey = KbName('RightShift');
spaceKey = KbName('space');
calibrateKey = KbName('c');
oldPressSecs = 0;
count = 0;
ListenChar(2);
try
winRect = [0 0 800 600];
winRect = [];
screenid = max(Screen('Screens'));
oldsync=Screen('Preference', 'SkipSyncTests', 2);
win = Screen('OpenWindow', screenid, 0, winRect);
ShowCursor('CrossHair', screenid);
oeyes = PsychOpenEyes('OpenTracker', 1, win)
oldgain = PsychCamSettings('Gain', oeyes)
gain = PsychCamSettings('Gain', oeyes, 174)
imgtype = 0;
mbuttons = [];
while ~any(mbuttons)
tex =Screen('GetCapturedImage', win, oeyes, 1);
Screen('DrawTexture', win, tex, [], Screen('Rect', tex));
Screen('Close', tex);
% Flip at next retrace, but don't do anything to buffers, we'll
% overwrite anyway:
Screen('Flip', win, 0, 2);
[mx, my, mbuttons] = GetMouse(win);
end
while 1
% Show eye image:
tex =Screen('GetCapturedImage', win, oeyes, 1);
Screen('DrawTexture', win, tex, [], Screen('Rect', tex));
% Flip at next retrace, but don't do anything to buffers, we'll
% overwrite anyway:
Screen('Flip', win, 0, 2);
[clicks, mx, my] = GetClicks(win);
Screen('DrawTexture', win, tex, [], Screen('Rect', tex));
Screen('FrameOval', win, [255 255 0], CenterRectOnPoint([0 0 5 5], mx, my), 3, 3);
Screen('Flip', win, 0, 2);
mxs = mx;
mys = my;
[clicks, mx, my] = GetClicks(win);
mxe = mx;
mye = my;
Screen('DrawTexture', win, tex, [], Screen('Rect', tex));
eyeRect = [min(mxs, mxe), min(mys, mye), max(mxs, mxe), max(mys, mye)];
Screen('FrameRect', win, [255 255 0], eyeRect);
Screen('Flip', win, 0, 2);
% Release old texture:
Screen('Close', tex);
clicks = GetClicks(win);
if clicks > 1
break;
end
end
minDist = RectWidth(eyeRect) / 8
maxDist = RectWidth(eyeRect) / 2 * 1.2
% apprArea = RectWidth(eyeRect)/2 * RectHeight(eyeRect)/2 * pi;
apprArea = max(RectWidth(eyeRect), RectHeight(eyeRect))/2;
minArea = apprArea * 0.2
maxArea = apprArea * 2
% Set constraints on minimum and maximum distance of features wrt. the
% pupil center, and on the rough size of the allowable pupil/limbus fit
% ellipse:
PsychOpenEyes('SetDynamicConstraints', oeyes, minDist, maxDist, minArea, maxArea);
% Disable corneal reflection tracking and set a static reference point
% of (0,0) for visible spectrum eyetracking:
PsychOpenEyes('SetReferencePoint', oeyes, 0, 0);
tstring = [];
count = 0;
while 1
if count == 0
% First time setup of tracker settings:
curpar = PsychOpenEyes('TrackerParameters', oeyes);
% First time invocation: Set a few defaults:
curpar.eccentricity = 1.1;
curpar.initialAngleSpread = 360; % This works with visible spectrum imaging.
% curpar.initialAngleSpread = 45;
curpar.pupilEdgeThresh = 1;
curpar.fanoutAngle1 = 0; %-45;
curpar.fanoutAngle2 = 180; % 180 + 45;
curpar.featuresPerRay = 2;
curpar.specialFlags = +1;
curpar.rays = round(curpar.initialAngleSpread * 0.1);
curpar.gaussWidth = 3;
% Commit (possibly changed) parameters to tracker:
PsychOpenEyes('TrackerParameters', oeyes, curpar.pupilEdgeThresh, curpar.rays, curpar.minCand, curpar.corneaWinSize, curpar.edgeThresh, curpar.gaussWidth, curpar.eccentricity, curpar.initialAngleSpread, curpar.fanoutAngle1, curpar.fanoutAngle2, curpar.featuresPerRay, curpar.specialFlags);
end
% Query mouse:
[mx, my, mbutton] = GetMouse(win);
if mbutton(3)
break;
end
if mbutton(1)
% Wait for next gaze position sample, set new pupil center pos.
% as starting point for Starburst search:
eyesample = PsychOpenEyes('GetGazePosition', oeyes, mx, my);
else
% Wait for next gaze position sample:
eyesample = PsychOpenEyes('GetGazePosition', oeyes);
end
[keysDown, PressSecs, keyCode] = KbCheck;
if keysDown && ((PressSecs - oldPressSecs)>0.1)
dx = 0;
dy = 0;
if keyCode(leftArrow)
dx = -1;
end
if keyCode(rightArrow)
dx = +1;
end
if keyCode(downArrow)
dy = -1;
end
if keyCode(upArrow)
dy = +1;
end
% Query current settings:
curpar = PsychOpenEyes('TrackerParameters', oeyes)
exposure = PsychCamSettings('ExposureTime', oeyes);
if keyCode(rightGUI)
% Change rays or feature candidate parameters:
curpar.rays = curpar.rays + dx;
curpar.minCand = curpar.minCand + dy;
else
if keyCode(rightShiftKey)
% Change cornea search window size:
curpar.corneaWinSize = curpar.corneaWinSize + 10*dx;
if dy~=0
exposure = exposure + dy/10;
PsychCamSettings('ExposureTime', oeyes, exposure);
end
else
% Change detection thresholds:
curpar.pupilEdgeThresh = curpar.pupilEdgeThresh + dx;
curpar.edgeThresh = curpar.edgeThresh + dy;
end
end
if keyCode(spaceKey)
switch imgtype
case 0,
imgtype = 2;
case 2,
imgtype = 3;
case 3,
imgtype = 4;
case 4,
imgtype = 0;
end
end
if keyCode(calibrateKey)
PsychOpenEyes('CalibrateMapping', oeyes);
end
% Commit (possibly changed) parameters to tracker:
PsychOpenEyes('TrackerParameters', oeyes, curpar.pupilEdgeThresh, curpar.rays, curpar.minCand, curpar.corneaWinSize, curpar.edgeThresh, curpar.gaussWidth, curpar.eccentricity, curpar.initialAngleSpread, curpar.fanoutAngle1, curpar.fanoutAngle2, curpar.featuresPerRay, curpar.specialFlags);
% Clear the framebuffers:
Screen('Flip', win);
% Draw text with new tracker settings:
tstring = sprintf('Pupilthresh: %i , Edgethresh: %i , WinSize: %i , Rays: %i , Cand: %i, Exp: %f \nExcent.: %f , Spread: %f, fanOut1: %f fanOut2: %f \nFeatPerRay: %i sFlags: %i', curpar.pupilEdgeThresh, curpar.edgeThresh, ...
curpar.corneaWinSize, curpar.rays, curpar.minCand, exposure, curpar.eccentricity, curpar.initialAngleSpread, curpar.fanoutAngle1, curpar.fanoutAngle2, curpar.featuresPerRay, curpar.specialFlags);
fprintf('%s\n', tstring);
DrawFormattedText(win, tstring, 0, 485, 255, 240);
Screen('Flip', win);
DrawFormattedText(win, tstring, 0, 485, 255, 240);
Screen('Flip', win, 0, 2);
% Done with keyboard handling...
% Keyboard debouncer update:
oldPressSecs = PressSecs;
end
% Fetch debug images: This must be after calling 'GetGazePosition',
% otherwise you'll get stale images from previous cycle!
tex = PsychOpenEyes('GetTrackerTexture', oeyes, imgtype);
% Show eye image:
Screen('DrawTexture', win, tex, [], Screen('Rect', tex));
Screen('TextSize', win, 24);
% Draw reference point:
Screen('FillOval', win, [0 255 0], CenterRectOnPoint([0 0 10 10], eyesample.CorneaX, eyesample.CorneaY));
Screen('DrawText', win, 'CORNEA', eyesample.CorneaX + 5, eyesample.CorneaY + 5, [0 255 0]);
% Draw pupil point:
Screen('FillOval', win, [0 255 255], CenterRectOnPoint([0 0 10 10], eyesample.PupilX, eyesample.PupilY));
Screen('DrawText', win, 'PUPIL', eyesample.PupilX + 5, eyesample.PupilY + 5, [0 255 255]);
% Valid tracking result with calibrated gaze point?
if eyesample.Valid > 0
% Draw point of gaze:
Screen('FillOval', win, [255 255 0], CenterRectOnPoint([0 0 10 10], eyesample.GazeX, eyesample.GazeY));
Screen('FrameRect', win, [255 255 0], CenterRectOnPoint([0 0 10 10], eyesample.GazeX, eyesample.GazeY));
Screen('DrawText', win, 'GAZE', eyesample.GazeX + 5, eyesample.GazeY + 5, [255 255 0]);
end
if ~isempty(tstring) DrawFormattedText(win, tstring, 0, 485, 255, 240); end
% Flip at next retrace, but don't do anything to buffers, we'll
% overwrite anyway:
Screen('Flip', win, 0, 0);
% Release old texture:
Screen('Close', tex);
% Print out tracking results:
%disp(eyesample);
% Ready for next iteration...
count = count + 1;
end
PsychOpenEyes('CloseTracker', oeyes);
ShowCursor('Arrow', screenid);
Screen('CloseAll');
ListenChar(0);
Screen('Preference', 'SkipSyncTests', oldsync);
return;
catch
ListenChar(0);
if exist('oeyes', 'var')
PsychOpenEyes('CloseTracker', oeyes);
end
ShowCursor('Arrow', screenid);
Screen('CloseAll');
Screen('Preference', 'SkipSyncTests', oldsync);
psychrethrow(psychlasterror);
return;
end
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