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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" type="image/png" href="/static/favicon.png">
<link rel="icon" type="image/x-icon" href="/static/favicon.ico">
<title>Draw and Predict Handwritten Digits</title>
<style>
body {
font-family: 'Montserrat', sans-serif;
}
#prediction-result {
}
.prediction-item {
margin-bottom: 10px;
display: flex;
}
.prediction-digit {
font-size: 14px;
}
.progress-container {
display: flex;
align-items: center;
}
.progress-bar {
width: 100px;
height: 10px;
background-color: #ccc;
border-radius: 6px;
margin-left: 10px;
}
.progress {
height: 100%;
border-radius: 5px;
background-color: #088395;
transition: width 0.3s ease-in-out;
}
#whiteboard {
border: 3px solid #088395;
/* Simple black border */
border-radius: 10px;
/* Rounded corners */
box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
/* Subtle shadow effect */
background-color: #088395;
}
#capture-button {
background-color: #071952;
color: white;
border: none;
padding: 10px 20px;
cursor: pointer;
font-size: 16px;
border-radius: 3px;
margin-top: 10px;
width: 190px;
margin-right: 20px;
}
#clear-button {
background-color: #F2F7A1;
color: black;
border: none;
padding: 10px 20px;
cursor: pointer;
font-size: 16px;
border-radius: 3px;
margin-top: 10px;
width: 190px;
}
#container {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
margin-right: 10px;
}
#btn-container {
display: flex;
flex-direction: row;
align-items: center;
}
#parent {
display: flex;
justify-content: center;
align-items: center;
}
</style>
</head>
<body>
<h3 style="text-align:center;">Draw and Predict Handwritten Digits</h3>
<div id="parent">
<div id='container'>
<canvas id="whiteboard" width="400" height="200"></canvas>
<div id='btn-container'>
<button id="capture-button">Predict</button>
<button id="clear-button">Clear</button>
</div>
</div>
<div id="prediction-result"></div>
</div>
<script>
var canvas = document.getElementById('whiteboard');
var context = canvas.getContext('2d');
var drawing = false;
context.strokeStyle = 'white';
canvas.addEventListener('mousedown', function (e) {
drawing = true;
context.beginPath();
context.moveTo(e.clientX - canvas.getBoundingClientRect().left, e.clientY - canvas.getBoundingClientRect().top);
});
canvas.addEventListener('mousemove', function (e) {
if (drawing) {
context.lineTo(e.clientX - canvas.getBoundingClientRect().left, e.clientY - canvas.getBoundingClientRect().top);
context.stroke();
}
});
canvas.addEventListener('mouseup', function () {
drawing = false;
});
canvas.addEventListener('mouseout', function () {
drawing = false;
});
var clearButton = document.getElementById('clear-button');
clearButton.addEventListener('click', function () {
context.clearRect(0, 0, canvas.width, canvas.height);
});
function isCanvasEmpty(canvas) {
const context = canvas.getContext('2d');
const pixelBuffer = new Uint32Array(context.getImageData(0, 0, canvas.width, canvas.height).data.buffer);
return !pixelBuffer.some(color => color !== 0);
}
var predictionResult = document.getElementById('prediction-result');
var captureButton = document.getElementById('capture-button');
captureButton.addEventListener('click', function () {
captureButton.disabled = true
captureButton.style.opacity = "0.5";
captureButton.innerText = 'Loading...'
var imageData = canvas.toDataURL("image/png");
var formData = new FormData();
formData.append("image", dataURLtoBlob(imageData), "image.png");
fetch('/predict', {
method: 'POST',
body: formData,
})
.then(response => response.json())
.then(data => {
predictionResult.innerHTML = '';
data.prediction.forEach(item => {
const digitItem = document.createElement('div');
digitItem.classList.add('prediction-item');
const digitText = document.createElement('div');
digitText.classList.add('prediction-digit');
digitText.textContent = `Digit ${item.digit}:`;
const progressContainer = document.createElement('div');
progressContainer.classList.add('progress-container');
const progressBar = document.createElement('div');
progressBar.classList.add('progress-bar');
const progress = document.createElement('div');
progress.classList.add('progress');
progress.style.width = item.prob;
progressBar.appendChild(progress);
progressContainer.appendChild(progressBar);
digitItem.appendChild(digitText);
digitItem.appendChild(progressContainer);
predictionResult.appendChild(digitItem);
captureButton.disabled = false
captureButton.style.opacity = "1";
captureButton.innerText = 'Predict'
});
})
.catch(error => {
console.error('Error:', error);
predictionResult.textContent = 'Something wentr wrong, try again.';
captureButton.disabled = false
captureButton.style.opacity = "1";
captureButton.innerText = 'Predict'
});
});
// Function to convert a data URL to a Blob
function dataURLtoBlob(dataURL) {
var arr = dataURL.split(',');
var mime = arr[0].match(/:(.*?);/)[1];
var bstr = atob(arr[1]);
var n = bstr.length;
var u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
}
</script>
</body>
</html> |