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tensor.html
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tensor.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>手写字体识别</title>
<style type="text/css">
*{ margin:0; padding:0;}
body{ background: #fff; padding: 20px; }
h1 {
text-align: center;
}
#canvas {
margin: 0 auto;
display: block;
position: absolute;
left: 400px;
top: 200px;
background-color: #fff;
border: 1px solid;
}
#canvas::before {
content: '手写区：';
display: block;
}
#canvasSmall {
background-color: #fff;
}
#canvasImg {
position: absolute;
top: 220px;
left: 800px;
display: block;
border: 1px solid #ccc;
-webkit-transform: scale(2.4);
}
.text1 {
position: absolute;
left: 400px;
top: 123px;
}
.text2 {
position: absolute;
left: 800px;
top: 123px;
}
.text3 {
position: absolute;
left: 1100px;
top: 123px;
}
.opera {
position: absolute;
top: 576px;
left: 456px;
}
.opera button {
width: 100px;
height: 50px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/@tensorflow/[email protected]"> </script>
</head>
<body>
<h1>调度字体</h1>
<p class="text1">手写区：</p>
<canvas id="canvas" width="300" height="300"></canvas>
<p class="text2">预览区：</p>
<img id="canvasImg" style="width:28px;height:28px;" src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAAABJRU5ErkJggg=="/>
<div class="opera">
<button id="translate">预测</button>
<button id="clear">清除</button>
</div>
<p class="text3">结果区：</p>
<div style="color: red;
position: absolute;
left: 1200px;
top: 200px;
font-size: 21px;" id="myw"></div>
<script>
async function loadModel(){
window.pmodel = await tf.loadModel('./model/model.json');
}
loadModel();
</script>
<script>
var ctx;
var x;
var y;
var a;
var dragFlag = false;
function circle(x,y) {
ctx.beginPath();
ctx.arc(x, y, 9, 0, Math.PI*2, true);
ctx.closePath();
ctx.fillStyle = "#000000";
ctx.fill();
}
function init() {
var canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
document.getElementById("translate").addEventListener("click",translate);
document.getElementById("clear").addEventListener("click",clear);
canvas.addEventListener("mousemove",mouseMove);
canvas.addEventListener("mousedown",mousedown);
canvas.addEventListener("mouseup",mouseup);
ctx.fillStyle = '#ffffff';
ctx.fillRect(0,0,300,300);
}
function clear(){
ctx.fillStyle = '#ffffff';
document.getElementById("myw").innerHTML = '';
ctx.fillRect(0,0,300,300);
document.getElementById("canvasImg").src = 'data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAAABJRU5ErkJggg==';
}
function translate(e){
// var imageData = ctx.getImageData(0, 0, ctx.canvas.width, ctx.canvas.height);
// let row = 0;
// let column = 0;
// let pixels = [[]];
// const data = imageData.data;
// var a2 = document.getElementById("a2").getContext('2d');
// a2.drawImage(ctx.canvas, 0, 0, 28, 28);
// var f = a2.getImageData(0, 0, 28, 28);
let img = tf.fromPixels(document.getElementById("canvasImg"), 1);
img = img.reshape([1,28, 28, 1]);
img = tf.cast(img, 'float32');
let g = window.pmodel.predict(img);
var b = g.argMax(1);
console.log(g.dataSync());
document.getElementById('myw').innerText = b.dataSync()[0];
}
function mousedown(){
dragFlag = true;
}
function mouseup(){
dragFlag = false;
document.getElementById("canvasImg").src = ctx.canvas.toDataURL();
}
function mouseMove (e){
var rect = e.currentTarget.getBoundingClientRect();
var gravityPoint = {
x: e.clientX - rect.left,
y: e.clientY - rect.top
};
x = gravityPoint.x;
y = gravityPoint.y;
if (dragFlag) {
circle(x,y);
}
}
init();
</script>
</body>
</html>