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digit.html
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digit.html
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<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Handwriting Recogniser</title>
<script type="text/javascript" src="params.js"></script>
<script type="text/javascript" src="sylvester/lib/sylvester-min.js"></script>
<script type="text/javascript" src="thumb.js"></script>
<script type="text/javascript">
temp1 = [];
// temp1[0][0] = t1[0];
for(var i=0; i<25; i++)
{
temp1[i] = [];
for(var j=0; j<401; j++)
{
temp1[i][j] = t1[(i*400)+j];
}
}
// console.log(temp1);
temp2 = [];
for(var i=0; i<10; i++){
temp2[i] = [];
for(var j=0; j<26; j++){
temp2[i][j]= t2[(i*25)+j];
}
}
var T1 = $M(temp1);
var T2 = $M(temp2);
</script>
<script type="text/javascript">
/////DEBUG
var d;
/////
window.onload = function(){
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
//lala
var cs = document.getElementById('small');
var ctxs = cs.getContext('2d');
var recognize = document.getElementById('recognize');
var state= 0;
ctx.lineWidth = 30;
ctx.lineCap = 'round';
function draw(xP, yP,x, y, ctx){
ctx.beginPath();
ctx.moveTo(xP, yP)
ctx.lineTo(x,y);
ctx.stroke();
}
//Get coordinates relative to the canvas
function getCursor(e){
var mouse = []; //might change to object
if(e.pageX || e.pageY){
mouse[0] = e.pageX;
mouse[1] = e.pageY;
}
else{
mouse[0] = e.clientX + document.body.scrollLeft+ document.documentElement.scrollLeft;
mouse[1] = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
}
mouse[0] -= canvas.offsetLeft;
mouse[1] -= canvas.offsetTop;
return mouse;
}
canvas.addEventListener('mousedown', function(e){
state = 1;
var mouse= getCursor(e);
var xP = mouse[0];
var yP = mouse[1];
canvas.onmousemove = function(e){
if(state != 0)
{
var mouse = getCursor(e);
var x = mouse[0];
var y = mouse[1];
//console.log(x,y);
draw(xP, yP,x,y, ctx);
//draw(xP, yP, x,y, ctxs);
xP = x;
yP = y;
}
}
});
canvas.addEventListener('mouseup', function(){
state = 0;
});
function feedForward(X){
//add bais
//X = 400X1
//add bias
var tX = X.slice(0);
tX.unshift(1);
xMat = $M(tX);
function sigmoid(a){
return (1/(1+Math.exp(-1*(a))));
}
console.log(T1.rows() + " "+T1.cols());
//window.t = xMat.transpose();
//window.yes = T1.canMultiplyFromLeft((xMat));
//window.tm = T1.multiply((xMat));
tm = T1.multiply(xMat);
A2 = tm.map(sigmoid); //a2 = sigmiod(theta1*a1'''')
//console.log(A2);
//Add bais
var o = Matrix.Zero(1,1).map(function(x){return x+1;});
A2 = A2.transpose();
A2 = o.augment(A2);
window.a2 = A2;
window.tm = T2.multiply((A2.transpose()));
A3 = tm.map(sigmoid);
window.tm = A3;
var m = -9999999999999;
var mi;
for(var i=0; i<tm.rows(); i++){if(tm.elements[i] > m){m = tm.elements[i]; mi = i;}}
console.log(A2);
//theta1
return mi;
}
recognize.addEventListener('click', function(){
//this is where the magic happens!
// var canvasSmall = document.createElement('canvas');
// var ctxSmall = canvasSmall.getContext('2d');
//ctx.scale(0.05,0.05);
var imageData = ctx.getImageData(0,0,400,400);
//ctxs.scale(400,400);
//var imageData = ctx.getImageData(0,0,400,400);
// ctxSmall.putImageData(imageData,20,20);
// console.log(imageData);
// ctxs.putImageData(imageData, 0 , 0);
//DEBUG
d = imageData;
var newCanvas = document.createElement('canvas');
newCanvas.width = 400;
newCanvas.height = 400;
newCanvas.getContext('2d').putImageData(imageData, 0, 0);
ctxs.scale(0.05,0.05);
ctxs.drawImage(newCanvas, 0, 0);
imageData = ctxs.getImageData(0,0,20,20);
window.ID = imageData;
var X=[];
var xi=0;
for(var i=3; i<(4*20*20); i+=4){
X[xi] = imageData.data[i]/255;
xi++;
}
//X[0] =0;
window.XG = X;
//window.X = X;
// ctxs.scale(20,20);
//cos
//ctxs.putImageData(imageData,0,0);
var ans = feedForward(X);
console.log(ans);
});
}
</script>
<style>
body{
background: #666;
text-align: center;
font-family: Tahoma, Verdana;
}
#canvas{
display: block;
margin: 20px auto;
text-align: center;
box-shadow: 0 0 28px #333;
background: #fff;
width: 400px;
border-radius: 14px;
}
h2{
color: #dddd22;
}
#main{
padding: 40px 0;
}
#recognize{
margin: 8px auto;
padding: 8px;
font-size: 19px;
}
#small{
display: block;
//margin: 50px;
border: 20px solid;
background: #fff;
}
</style>
</head>
<body>
<div id="main">
<h2>Go on! Draw a number :D</h2>
<canvas id="canvas" width = "400px" height= "400px">
Your browser doesnt support canvas :(
</canvas>
<canvas id="small" width= "400px" height="400px">
</canvas>
<button id="recognize">
Recognise!
</button>
</div>
</body>
</html>