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visualizer.html
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visualizer.html
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<!DOCTYPE html>
<html>
<head>
<title>Gaze Visualization</title>
<meta name="description" content="Visualization for PU web browser based gaze tracking"/>
<meta name="keywords" content="gaze, eye tracking, webcam, HCI, crowdsourcing, computer vision" />
<meta name="author" content="Pingmei Xu"/>
<meta name="owner" content="Princeton Vision Group"/>
<link rel="shortcut icon" href="./styles/logo/pu_logo.png"/>
<link rel="stylesheet" type="text/css" href="./styles/main.css">
<style type="text/css">
#files{
position: absolute;
font-size: 15px;
}
form{
position: absolute;
}
button{
position: absolute;
font-size: 20px;
font-family: Courier New,monospace;
color: #FFFFFF;
background-color:#3399FF;
border-style: none;
}
button:hover{
color: #000000;
}
#imgCanvas, #overlay, #memtestinfo{
position: absolute;
}
</style>
</head>
<body>
<input type="file" id="files" name="files[]"/>
<p id="msg" style="display: none;"></p>
<p id="memtestinfo" style="display: none;"></p>
<form id='form'>
URL: <input type="text" name="url" id="urlText" size="100">
<input type="checkbox" id="grayCheckbox" checked>Grayscale
<input type="checkbox" id="arrowCheckbox" checked>Draw path
</form>
<button id='drawBttn' onclick="draw()">draw</button>
<canvas id="imgCanvas" width="1200" height="1800" style="display: none;"></canvas>
<canvas id="overlay" width="1200" height="1800" style="display: none;"></canvas>
<script src="./js/lib/jquery-1.11.0.min.js"></script>
<script>
// global parameters
var imgCanvas, imgCanvasCtx, overlay, overlayCtx;
var JsonObj = null;
var saveQueue = null;
var memActionQueue = null;
var GRAY = true;
var ARROW = true;
var gsize = 400, w = 360, h = 225, r = 2, color = '#F00';
// memory test
var gridsize = [210, 210], gridspacing = 10;
var numshown = 3, numgrids;
var gridloc; // location of each image grid
var gridmark; // marks for each bird
var gridsel = null; // 0: unchecked, 1: checked
var gridimgs = null; // image path
var gridColor = "#E6E6E6";
var selgridColor = ["#0F0", "#F00"];
var gridLineWidth = 2;
var selLineWidth = 5;
var gridselans = null;
var memtestStartTime = null;
var basemark, stepmark = 10, penaltymark, memtestscore;
var gridx = 0, gridy = 0;
var memtestscore;
var hitimgs;
var imggridloc = null;
// center an element and display, [w,h]: size of the window
var displayElm2Center = function(id, w, h){
var l = (w - $(id).width())/2;
var t = (h - $(id).height())/2;
$(id).css({left: l, top: t});
$(id).show();
}
function setupcanvas(){
imgCanvas = document.getElementById('imgCanvas');
imgCanvasCtx = imgCanvas.getContext('2d');
var w = Math.max($(window).width(), $('#imgCanvas').width())+100;
var h = Math.max($(window).height(), $('#imgCanvas').height())+280
displayElm2Center('#imgCanvas', w, h);
$('#imgCanvas').show();
overlay = document.getElementById('overlay');
overlayCtx = overlay.getContext('2d');
displayElm2Center('#overlay', w, h);
$('#overlay').show();
displayElm2Center('#files', $('#files').width()+40, 40);
displayElm2Center('#form', $('#form').width()+40, 100);
displayElm2Center('#drawBttn', $('#drawBttn').width()+40, 200);
}
$( "#grayCheckbox" ).on( "click", function() {
GRAY = document.getElementById("grayCheckbox").checked;
});
$( "#arrowCheckbox" ).on( "click", function() {
ARROW = document.getElementById("arrowCheckbox").checked;
});
function handleFileSelect(evt) {
var files = evt.target.files; // FileList object
f = files[0];
var reader = new FileReader();
// Closure to capture the file information.
reader.onload = (function (theFile) {
return function (e) {
// Render thumbnail.
JsonObj = e.target.result
var parsedJSON = JSON.parse(JsonObj);
loadData(parsedJSON); // load local json file
};
})(f);
reader.readAsText(f, 'UTF-8');
}
function displayDigit(x){
return x.toFixed(3);
}
function loadData(data){
saveQueue = data;
visualizeResults();
}
function draw(){
if ($('#urlText').val() != ""){
$.getJSON($('#urlText').val(), function(data) {
saveQueue = data;
visualizeResults();
})
.fail(function() {
alert('Wrong URL.');
});
}else{
visualizeResults();
}
}
function visualizeResults(){
if(saveQueue == null) return;
overlayCtx.clearRect(0, 0, $('#overlay').width(), $('#overlay').height());
imgCanvasCtx.clearRect(0, 0, $('#imgCanvas').width(), $('#imgCanvas').width());
if(saveQueue[0].format =='matlab'){
screenw = saveQueue[0].screenw;
screenh = saveQueue[0].screenh
imgpaths = saveQueue[0].imgpaths;
gazeloc = saveQueue[0].gazeloc;
numimg = imgpaths.length;
// meta information
var str = '';
str += 'Screen size: ' + screenw + '*' + screenh + '; ';
$('#msg').html(str);
displayElm2Center('#msg', $(window).width(), 200);
$('#msg').show();
}else{
expsequence = saveQueue[1];
resultQueue = saveQueue[2];
screenw = saveQueue[0].screenw;
screenh = saveQueue[0].screenh
// meta information
var str = '';
if(saveQueue[3].looerr_test != undefined){
var looerr = eval(saveQueue[3].looerr_test);
str += 'LOO error: ' + looerr.map(displayDigit) + ';';
}
str += ' Train error:' + saveQueue[3].trainerr.toFixed(3) + '</br>';
str += 'Screen size: ' + screenw + '*' + screenh + '; ';
str += 'Patch size: ' + (saveQueue[0].patchsize[0]+saveQueue[0].margin[0]) + '*' + (saveQueue[0].patchsize[1]+saveQueue[0].margin[1]) + '; ';
$('#msg').html(str);
displayElm2Center('#msg', $(window).width(), 200);
$('#msg').show();
// images and eye tracking resutls
var numimg = 0;
var imgpaths = [];
var imgidx = Array.apply(null, new Array(expsequence.length)).map(Number.prototype.valueOf,-1);
for (var i = 0; i < expsequence.length; i++){
if (expsequence[i].type == 'image'){
imgidx[i] = imgpaths.length;
imgpaths.push(expsequence[i].path);
}
}
numimg = imgpaths.length;
var gazeloc = new Array(numimg);
for (var i = 0; i < numimg; i++){
gazeloc[i] = [];
}
for (var i = 0; i < resultQueue.length; i++){
entry = resultQueue[i];
if(imgidx[resultQueue[i].index] != -1){
gazeloc[imgidx[resultQueue[i].index]].push(resultQueue[i].value);
}
}
// memory test
memActionQueue = saveQueue[4];
}
// match original aspect ratio
ratio = screenw/screenh;
if(w/h > ratio){
w = h*ratio;
}else{
h = w/ratio;
}
for (var i = 0; i < numimg; i++){
x = (i-Math.floor(i/3)*3) * gsize;
y = Math.floor(i/3) * gsize;
showImgGaze(imgCanvasCtx, overlayCtx, x, y, w, h, imgpaths[i], gazeloc[i], r, color);
}
if(memActionQueue != null){
gridy = 50 + Math.ceil(numimg/3) * gsize;
visualizeMemoryTest(imgCanvasCtx, overlayCtx);
}
}
// display image and gaze data
function showImgGaze(ctx, ctxdraw, x, y, w, h, imgpath, gaze, r, color){
var image = new Image();
image.onload = function() {
var s = Math.min(w/image.width, h/image.height);
var rsw = image.width*s, rsh = image.height*s;
ctx.drawImage(image, x+(w-rsw)/2, y+(h-rsh)/2, rsw, rsh);
if(GRAY){
var imgPixels = ctx.getImageData(x+(w-rsw)/2, y+(h-rsh)/2, rsw, rsh);
for(var m = 0; m < imgPixels.height; m++){
for(var n = 0; n < imgPixels.width; n++){
var i = (m * 4) * imgPixels.width + n * 4;
var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
imgPixels.data[i] = avg;
imgPixels.data[i + 1] = avg;
imgPixels.data[i + 2] = avg;
}
}
ctx.putImageData(imgPixels, x+(w-rsw)/2, y+(h-rsh)/2);
}
if(ARROW){
for(var i = 0; i < gaze.length-1; i++){
if(gaze[i][0] > 0 && gaze[i][0] < 1 && gaze[i][1] > 0 && gaze[i][1] < 1 &&
gaze[i+1][0] > 0 && gaze[i+1][0] < 1 && gaze[i+1][1] > 0 && gaze[i+1][1] < 1){
ctxdraw.beginPath();
ctxdraw.moveTo(x+w*gaze[i][0], y+h*gaze[i][1]);
ctxdraw.lineTo(x+w*gaze[i+1][0], y+h*gaze[i+1][1]);
ctxdraw.strokeStyle = "#0F0";
ctxdraw.lineWidth = 1.5;
ctxdraw.closePath();
ctxdraw.stroke();
}
}
}
var cnt = 0;
for(var i = 0; i < gaze.length; i++){
if(gaze[i][0] > 0 && gaze[i][0] < 1 && gaze[i][1] > 0 && gaze[i][1] < 1){
drawCircle(ctxdraw, x+w*gaze[i][0], y+h*gaze[i][1], r, color, true);
cnt++;
}
}
if(gaze.length > 0){
drawCircle(ctxdraw, x+w*gaze[0][0], y+h*gaze[0][1], r*2, '#0F0', true, '#00F');
ctxdraw.fillStyle = "#000";
ctxdraw.fillText('#sample: ' + cnt,x,y+h+10);
}
}
image.src = imgpath;
}
// draw a circle
function drawCircle(ctx, x, y, r, linecolor, fill, color){
ctx.beginPath();
ctx.arc(x, y, r, 0, 2 * Math.PI, true);
ctx.closePath();
ctx.strokeStyle = linecolor;
ctx.stroke();
if(fill){
if(color == undefined) color = linecolor;
ctx.fillStyle = color;
ctx.fill();
}
}
function visualizeMemoryTest(ctx, overlayctx){
var item = memActionQueue[0];
imgpaths = item.imgpaths;
numgrids = item.numgrids;
numshown = item.numshown;
memshowidx = item.memshowidx;
gridimgs = item.gridimgs;
gridselans = item.gridselans;
basemark = item.basemark;
stepmark = item.stepmark;
penaltymark = item.penaltymark;
var item = memActionQueue[1];
memtestStartTime = item.time;
var item = memActionQueue[memActionQueue.length-1];
gridsel = item.gridsel;
memtestscore = item.memtestscore;
var str = '';
str += 'Memory test score: ' + memtestscore;
str += '; Number of clicks: ' + (memActionQueue.length-4);
$('#memtestinfo').html(str);
displayElm2Center('#memtestinfo', $(window).width(), (gridy+50)*2);
gridloc = getgridloc(0, gridy-50, [10,10], numgrids, 5);
drawGrids(ctx, gridx, gridy, gridloc, [5,5], gridselans, gridselans, gridColor, selgridColor, 5, 5);
imggridloc = getgridloc(gridx, gridy, gridsize, numgrids, gridspacing);
drawGrids(overlayctx, gridx, gridy, imggridloc, gridsize, gridsel, gridselans, gridColor, selgridColor, gridLineWidth, selLineWidth);
displayMemImages();
}
// draw a rounded corner rectangle
function drawRoundCornerRect(ctx, x, y, w, h, color, width){
ctx.lineJoin = 'round';
ctx.lineWidth = width;
ctx.strokeStyle = color;
rcorner = width;
ctx.strokeRect(x, y, w+(rcorner/2), h+(rcorner/2));
ctx.stroke();
ctx.lineJoin = 'miter';
}
function displayMemImages(){
// preloading hit images and memory images
hitimgs = new Array(imgpaths.length);
preloadHitImgs(0);
}
function preloadHitImgs(idx){
if(idx >= imgpaths.length){
drawGridsImg(imgCanvasCtx, imggridloc, gridsize, null);
return;
}
hitimgs[idx] = new Image();
hitimgs[idx].onload = function(){
preloadHitImgs(idx+1);
};
hitimgs[idx].src = imgpaths[idx];
}
// image gallery on a fixed grid
function drawGridsImg(ctx, loc, size, imggrid){
var numy = loc.length;
var numx = loc[0].length;
var w = size[1], h = size[0];
for(var i = 0; i < numy; i++){
for(var j = 0; j < numx; j++){
var image = hitimgs[gridimgs[i][j]];
var s = Math.min(w/image.width, h/image.height);
var rsw = image.width*s, rsh = image.height*s;
ctx.drawImage(image, loc[i][j][0]+(w-rsw)/2, loc[i][j][1]+(h-rsh)/2, rsw, rsh);
}
}
}
// get coordinates of grids
function getgridloc(x, y, size, grids, spacing){
var numy = grids[0];
var numx = grids[1];
var w = size[1], h = size[0];
var loc = new Array(numy); // one row
for(var i = 0; i < numy; i++){
loc[i] = new Array(numx);
for(var j = 0; j < numx; j++){
loc[i][j] = new Array(2);
loc[i][j][0] = x + (j+1)*spacing + j*w;
loc[i][j][1] = y + (i+1)*spacing + i*h;
}
}
return loc;
}
// draw grids
function drawGrids(ctx, x, y, loc, size, sel, selans, color, selcolor, width, selwidth){
var numy = loc.length;
var numx = loc[0].length;
var w = size[1], h = size[0];
// draw grids
ctx.beginPath();
for(var i = 0; i < numy; i++){
for(var j = 0; j < numx; j++){
if(sel[i][j] == 0){
drawRoundCornerRect(ctx, loc[i][j][0], loc[i][j][1], w, h, color, width);
}
else if(selans[i][j] == 1){
drawRoundCornerRect(ctx, loc[i][j][0], loc[i][j][1], w, h, selcolor[0], selwidth);
}
else{
drawRoundCornerRect(ctx, loc[i][j][0], loc[i][j][1], w, h, selcolor[1], selwidth);
}
}
}
}
</script>
<script>
setupcanvas();
document.getElementById('files').addEventListener('change', handleFileSelect, false);
</script>
</body>
</html>