// Cloned by Jai Warde on 9 Dec 2020 from World "Character recognition neural network" by "Coding Train" project
// Please leave this clone trail here.
// Port of Character recognition neural network from here:
// https://github.com/CodingTrain/Toy-Neural-Network-JS/tree/master/examples/mnist
// with many modifications
// --- defined by MNIST - do not change these ---------------------------------------
const PIXELS = 28; // images in data set are tiny
const PIXELSSQUARED = PIXELS * PIXELS;
// number of training and test exemplars in the data set:
const NOTRAIN = 60000;
const NOTEST = 10000;
//--- can modify all these --------------------------------------------------
// no of nodes in network
const noinput = PIXELSSQUARED;
const nohidden = 64;
const nooutput = 10;
// code added to crop the doodle image canvas pixel area
const PIXELS_DROP = 24;
const learningrate = 0.1; // default 0.1
// should we train every timestep or not
let do_training = true;
// how many to train and test per timestep
const TRAINPERSTEP = 30;
const TESTPERSTEP = 5;
// multiply it by this to magnify for display
const ZOOMFACTOR = 9;
const ZOOMPIXELS = ZOOMFACTOR * PIXELS;
// 3 rows of
// large image + 50 gap + small image
// 50 gap between rows
const canvaswidth = ( PIXELS + ZOOMPIXELS ) + 50;
const canvasheight = ( ZOOMPIXELS * 3 ) + 100;
const DOODLE_THICK = 16; // thickness of doodle lines
const DOODLE_BLUR = 1; // Removing the blur factor to improve the CNN model accuracy
let mnist;
// all data is loaded into this
// mnist.train_images
// mnist.train_labels
// mnist.test_images
// mnist.test_labels
let nn;
let trainrun = 1;
let train_index = 0;
let testrun = 1;
let test_index = 0;
let total_tests = 0;
let total_correct = 0;
// images in LHS:
let doodle, demo;
let doodle_exists = false;
let demo_exists = false;
let mousedrag = false; // are we in the middle of a mouse drag drawing?
// save inputs to global var to inspect
// type these names in console
var train_inputs, test_inputs, demo_inputs, doodle_inputs;
// Matrix.randomize() is changed to point to this. Must be defined by user of Matrix.
function randomWeight()
{
return ( AB.randomFloatAtoB ( -0.5, 0.5 ) );
// Coding Train default is -1 to 1
}
// CSS trick
// make run header bigger
$("#runheaderbox").css ( { "max-height": "95vh" } );
//--- start of AB.msgs structure: ---------------------------------------------------------
// We output a serious of AB.msgs to put data at various places in the run header
var thehtml;
// 1 Doodle header
thehtml = "<hr> <h1> 1. Doodle </h1> Top row: Doodle (left) and shrunk (right). <br> " +
" Draw your doodle in top LHS. <button onclick='wipeDoodle();' class='normbutton' >Clear doodle</button> <br> ";
AB.msg ( thehtml, 1 );
// 2 Doodle variable data (guess)
// 3 Training header
thehtml = "<hr> <h1> 2. Training </h1> Middle row: Training image magnified (left) and original (right). <br> " +
" <button onclick='do_training = false;' class='normbutton' >Stop training</button> <br> ";
AB.msg ( thehtml, 3 );
// 4 variable training data
// 5 Testing header
thehtml = "<h3> Hidden tests </h3> " ;
AB.msg ( thehtml, 5 );
// 6 variable testing data
// 7 Demo header
thehtml = "<hr> <h1> 3. Demo </h1> Bottom row: Test image magnified (left) and original (right). <br>" +
" The network is <i>not</i> trained on any of these images. <br> " +
" <button onclick='makeDemo();' class='normbutton' >Demo test image</button> <br> ";
AB.msg ( thehtml, 7 );
// 8 Demo variable data (random demo ID)
// 9 Demo variable data (changing guess)
const greenspan = "<span style='font-weight:bold; font-size:x-large; color:darkgreen'> " ;
//--- end of AB.msgs structure: ---------------------------------------------------------
const SOUND_ALARM = '/uploads/jai/audio1.wav' ;
var alarm = new Audio ( SOUND_ALARM );
function setup()
{
createCanvas ( canvaswidth, canvasheight );
doodle = createGraphics ( ZOOMPIXELS, ZOOMPIXELS ); // doodle on larger canvas
doodle.pixelDensity(1);
// JS load other JS
// maybe have a loading screen while loading the JS and the data set
AB.loadingScreen();
alarm.play(); // play once, no loop
$.getScript ( "/uploads/codingtrain/matrix.js", function(){
$.getScript ( "/uploads/codingtrain/mnist.js", function(){
$.getScript ( "/uploads/jai/nn.js", function(){ // updating the nn.js file to have the other activation functions tried and tested
$.getScript ( "/uploads/jai/utils.js", function(){ // loading the additional utility function for implementing the CNN network
$.getScript ( "/uploads/jai/cnn.js", function(){ // loading the CNN network implemented
$.ajax({
url: "/uploads/jai/cnn_accuracy.json", // loading the pre-defined weights for the CNN network
dateType: "json",
success: JSONLoaded
});
});
});
});
});
});
}
// load data set from local file (on this server)
function loadData()
{
loadMNIST ( function(data)
{
mnist = data;
console.log ("All data loaded into mnist object:")
console.log(mnist);
AB.removeLoading(); // if no loading screen exists, this does nothing
});
}
function getImage ( img ) // make a P5 image object from a raw data array
{
let theimage = createImage (PIXELS, PIXELS); // make blank image, then populate it
theimage.loadPixels();
for (let i = 0; i < PIXELSSQUARED ; i++)
{
let bright = img[i];
let index = i * 4;
theimage.pixels[index + 0] = bright;
theimage.pixels[index + 1] = bright;
theimage.pixels[index + 2] = bright;
theimage.pixels[index + 3] = 255;
}
theimage.updatePixels();
return theimage;
}
function getInputs ( img ) //convert imgage array into normalised input array
{
let inputs = [];
for (let i = 0; i < PIXELSSQUARED ; i++){
let bright = img[i];
inputs[i] = bright / 255; // normalise to 0 to 1
}
return ( inputs );
}
function trainit (show) // train the network with a single exemplar, from global var "train_index", show visual on or off
{
let img = mnist.train_images[train_index];
let label = mnist.train_labels[train_index];
// optional - show visual of the image
if (show)
{
var theimage = getImage ( img ); // get image from data array
image ( theimage, 0, ZOOMPIXELS+50, ZOOMPIXELS, ZOOMPIXELS ); // magnified
image ( theimage, ZOOMPIXELS+50, ZOOMPIXELS+50, PIXELS, PIXELS ); // original
}
// set up the inputs
let inputs = getInputs ( img ); // get inputs from data array
// set up the outputs
let targets = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
targets[label] = 1; // change one output location to 1, the rest stay at 0
train_inputs = inputs; // can inspect in console
nn.train ( inputs, targets );
thehtml = " trainrun: " + trainrun + "<br> no: " + train_index ;
AB.msg ( thehtml, 4 );
train_index++;
if ( train_index == NOTRAIN )
{
train_index = 0;
console.log( "finished trainrun: " + trainrun );
trainrun++;
}
}
function testit() // test the network with a single exemplar, from global var "test_index"
{
let img = mnist.test_images[test_index];
let label = mnist.test_labels[test_index];
// set up the inputs
let inputs = getInputs ( img );
test_inputs = inputs; // can inspect in console
let prediction = nn.predict(inputs); // array of outputs
let guess = findMax(prediction); // the top output
total_tests++;
if (guess == label) total_correct++;
let percent = (total_correct / total_tests) * 100 ;
thehtml = " testrun: " + testrun + "<br> no: " + total_tests + " <br> " +
" correct: " + total_correct + "<br>" +
" score: " + greenspan + percent.toFixed(2) + "</span>";
AB.msg ( thehtml, 6 );
test_index++;
if ( test_index == NOTEST )
{
console.log( "finished testrun: " + testrun + " score: " + percent.toFixed(2) );
testrun++;
test_index = 0;
total_tests = 0;
total_correct = 0;
}
}
//--- find no.1 (and maybe no.2) output nodes ---------------------------------------
// (restriction) assumes array values start at 0 (which is true for output nodes)
function find12(pValue) // return array showing indexes of no.1 and no.2 values in array
{
let a = 0;
let b = 0;
let aValue = 0;
let bValue = 0;
for (let i = 0; i < 10; i++) {
let predictedVal = pValue[0].getValue(0, 0, i);
if (predictedVal > aValue) {
a = i;
aValue = predictedVal;
}
}
for (let i = 0; i < 10; i++) {
let predictedVal = pValue[0].getValue(0, 0, i);
if ((a != i) && (predictedVal > bValue)) {
b = i;
bValue = predictedVal;
}
}
return [a, b];
}
// just get the maximum - separate function for speed - done many times
// find our guess - the max of the output nodes array
function findMax (a)
{
let no1 = 0;
let no1value = 0;
for (let i = 0; i < a.length; i++)
{
if (a[i] > no1value)
{
no1 = i;
no1value = a[i];
}
}
return no1;
}
var gif_loadImg, gif_createImg;
function preload() {
gif_loadImg = loadImage("/uploads/jai/EllipticalCostlyChrysomelid-size_restricted.gif");
gif_createImg = createImg("/uploads/jai/EllipticalCostlyChrysomelid-size_restricted.gif");
}
// --- the draw function -------------------------------------------------------------
// every step:
function draw()
{
// loads only first frame
image(gif_loadImg, 900, 80);
// updates animation frames by using an html
// img element, positioning it over top of
// the canvas.
gif_createImg.position(900, 80);
// check if libraries and data loaded yet:
if ( typeof mnist == 'undefined' ) return;
// how can we get white doodle on black background on yellow canvas?
// background('#ffffcc'); doodle.background('black');
background ('black');
if ( do_training )
{
// do some training per step
for (let i = 0; i < TRAINPERSTEP; i++)
{
if (i == 0) trainit(true); // show only one per step - still flashes by
else trainit(false);
}
// do some testing per step
for (let i = 0; i < TESTPERSTEP; i++)
testit();
}
// keep drawing demo and doodle images
// and keep guessing - we will update our guess as time goes on
if ( demo_exists )
{
drawDemo();
guessDemo();
}
if ( doodle_exists )
{
drawDoodle();
guessDoodle();
}
// detect doodle drawing
// (restriction) the following assumes doodle starts at 0,0
if ( mouseIsPressed ) // gets called when we click buttons, as well as if in doodle corner
{
// console.log ( mouseX + " " + mouseY + " " + pmouseX + " " + pmouseY );
var MAX = ZOOMPIXELS + 20; // can draw up to this pixels in corner
if ( (mouseX < MAX) && (mouseY < MAX) && (pmouseX < MAX) && (pmouseY < MAX) )
{
mousedrag = true; // start a mouse drag
doodle_exists = true;
doodle.stroke('white');
doodle.strokeWeight( DOODLE_THICK );
doodle.line(mouseX, mouseY, pmouseX, pmouseY);
}
}
else
{
// are we exiting a drawing
if ( mousedrag )
{
mousedrag = false;
// console.log ("Exiting draw. Now blurring.");
doodle.filter (BLUR, DOODLE_BLUR); // just blur once
// console.log (doodle);
}
}
}
// Code implemented considering the Adam Smith webCNN GitHub repository
// CNN Neural Network used to guess Doodle hand-written image recognition
function JSONLoaded(response){
// new model implementation using CNN
cnnFromJSON(response);
console.log("JSON Loaded!");
console.log(response);
// old model implementation for training the data and testing the demo image
console.log ("All JS loaded");
nn = new NeuralNetwork( noinput, nohidden, nooutput );
nn.setLearningRate ( learningrate );
loadData();
}
// Loading the CNN network from the "cnn_accuracy" JSON file
function cnnFromJSON( networkJSON )
{
cnn = new WebCNN();
if ( networkJSON.momentum != undefined ){
cnn.setMomentum( networkJSON.momentum );
}
if ( networkJSON.lambda != undefined ){
cnn.setLambda( networkJSON.lambda );
}
if ( networkJSON.learningRate != undefined ){
cnn.setLearningRate( networkJSON.learningRate );
}
for ( var layerIndex = 0; layerIndex < networkJSON.layers.length; ++layerIndex ){
let layerDesc = networkJSON.layers[ layerIndex ];
console.log( layerDesc );
cnn.newLayer( layerDesc );
}
for ( var layerIndex = 0; layerIndex < networkJSON.layers.length; ++layerIndex ){
let layerDesc = networkJSON.layers[ layerIndex ];
switch ( networkJSON.layers[ layerIndex ].type ){
case LAYER_TYPE_CONV:
case LAYER_TYPE_FULLY_CONNECTED:
{
if ( layerDesc.weights != undefined && layerDesc.biases != undefined )
{
cnn.layers[ layerIndex ].setWeightsAndBiases( layerDesc.weights, layerDesc.biases );
}
break;
}
}
}
cnn.initialize();
}
// to bring the data in required format to feed the CNN model
function requireFormat(image,size){
return {
"width": size,
"height": size,
"data": getImage(randomCrop(image,size),size).pixels
};
}
function centerImage(pixels, size){
// convert to matrix
let m = [];
for(let i = 0; i < size; i++){
m[i] = [];
for(let j = 0; j < size; j++){
m[i][j] = pixels[(i*size + j) * 4];
}
}
// To compute the bounding box of the doodle image canvas
var topmost = Number.MAX_VALUE;
var leftmost = Number.MAX_VALUE;
var bottommost = -1;
var rightmost = -1;
for(var y = 0; y < m.length; y++){
var l = m[y].indexOf(255);
var r = m[y].lastIndexOf(255);
if (l >= 0 && l < leftmost) leftmost = l; // setting the leftmost position
if (r >= 0 && r > rightmost) rightmost = r; // setting the rightmost position
if (l >= 0 && y < topmost) topmost = y; // setting the topmost position
if (l >= 0 && y > bottommost) bottommost = y; // setting the bottommost position
}
// translate to centre
let transY = Math.floor((size - bottommost - topmost) / 2);
let transX = Math.floor((size - rightmost - leftmost) / 2);
let result = Array(size).fill().map(() => Array(size).fill(0));
for(i = topmost; i <= bottommost; i++)
for(j = leftmost; j <= rightmost; j++)
result[i + transY][j + transX] = m[i][j];
//convert back to 1D array
let m1D = [];
for(let i = 0; i < size; i++)
for (let j = 0; j < size; j++)
m1D[i*size + j] = result[i][j];
return m1D;
}
// convert image array into normalized input array
function randomCrop(img, size){
const maxStartIndex = PIXELS - size;
let xRand = Math.floor( Math.random() * maxStartIndex);
let yRand = Math.floor( Math.random() * maxStartIndex);
return crop(img, size, xRand, yRand);
}
// Crop of size * size part from image starting at (X, Y)
function crop(img, size, x = 2, y = 2){
const PIXELS_DROP = size;
let xEnd = x + PIXELS_DROP;
let yEnd = y + PIXELS_DROP;
let inputs = [];
for (let i = x; i < xEnd; i++)
for (let j = y; j < yEnd; j++)
inputs.push(img[ i * PIXELS + j ]);
return(inputs);
}
//--- demo -------------------------------------------------------------
// demo some test image and predict it
// get it from test set so have not used it in training
function makeDemo()
{
demo_exists = true;
var i = AB.randomIntAtoB ( 0, NOTEST - 1 );
demo = mnist.test_images[i];
var label = mnist.test_labels[i];
thehtml = "Test image no: " + i + "<br>" +
"Classification: " + label + "<br>" ;
AB.msg ( thehtml, 8 );
// type "demo" in console to see raw data
}
function drawDemo()
{
var theimage = getImage ( demo );
// console.log (theimage);
image ( theimage, 0, canvasheight - ZOOMPIXELS, ZOOMPIXELS, ZOOMPIXELS ); // magnified
image ( theimage, ZOOMPIXELS+50, canvasheight - ZOOMPIXELS, PIXELS, PIXELS ); // original
}
function guessDemo()
{
let inputs = getInputs ( demo );
demo_inputs = inputs; // can inspect in console
let prediction = nn.predict(inputs); // array of outputs
let guess = findMax(prediction); // the top output
thehtml = " We classify it as: " + greenspan + guess + "</span>" ;
AB.msg ( thehtml, 9 );
}
//--- doodle -------------------------------------------------------------
function drawDoodle()
{
// doodle is createGraphics not createImage
let theimage = doodle.get();
// console.log (theimage);
image ( theimage, 0, 0, ZOOMPIXELS, ZOOMPIXELS ); // original
image ( theimage, ZOOMPIXELS+50, 0, PIXELS, PIXELS ); // shrunk
}
function guessDoodle()
{
// doodle is createGraphics not createImage
let img = doodle.get();
img.resize ( PIXELS, PIXELS );
img.loadPixels();
// set up inputs
let inputs = [];
for (let i = 0; i < PIXELSSQUARED ; i++)
{
inputs[i] = img.pixels[i * 4] / 255;
}
doodle_inputs = inputs; // can inspect in console
// feed forward to make prediction
//let prediction = nn.predict(inputs); // array of outputs
// Guessing the doodle using the CNN approach
let prediction = cnn.classifyImages([requireFormat(centerImage(img.pixels,PIXELS), PIXELS_DROP)]);
let b = find12(prediction); // get no.1 and no.2 guesses
thehtml = " We classify it as: " + greenspan + b[0] + "</span> <br>" +
" No.2 guess is: " + greenspan + b[1] + "</span>";
AB.msg ( thehtml, 2 );
}
function wipeDoodle()
{
doodle_exists = false;
doodle.background('black');
}
// --- debugging --------------------------------------------------
// in console
// showInputs(demo_inputs);
// showInputs(doodle_inputs);
function showInputs ( inputs )
// display inputs row by row, corresponding to square of pixels
{
var str = "";
for (let i = 0; i < inputs.length; i++)
{
if ( i % PIXELS == 0 ) str = str + "\n"; // new line for each row of pixels
var value = inputs[i];
str = str + " " + value.toFixed(2) ;
}
console.log (str);
}