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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>YOLOv8 Object Detection</title>
<style>
canvas {
display:block;
border: 1px solid black;
margin-top:10px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/onnxruntime-web/dist/ort.min.js"></script>
</head>
<body>
<input id="uploadInput" type="file"/>
<canvas></canvas>
<script>
const input = document.getElementById("uploadInput");
input.addEventListener("change",async(event) => {
const data = new FormData();
data.append("image_file",event.target.files[0],"image_file");
const response = await fetch("/detect",{
method:"post",
body:data
});
const boxes = await response.json();
draw_image_and_boxes(event.target.files[0],boxes);
})
function draw_image_and_boxes(file,boxes) {
const img = new Image()
img.src = URL.createObjectURL(file);
img.onload = () => {
const canvas = document.querySelector("canvas");
canvas.width = img.width;
canvas.height = img.height;
const ctx = canvas.getContext("2d");
ctx.drawImage(img,0,0);
ctx.strokeStyle = "#00FF00";
ctx.lineWidth = 3;
ctx.font = "18px serif";
boxes.forEach(([x1,y1,x2,y2,label]) => {
ctx.strokeRect(x1,y1,x2-x1,y2-y1);
ctx.fillStyle = "#00ff00";
const width = ctx.measureText(label).width;
ctx.fillRect(x1,y1,width+10,25);
ctx.fillStyle = "#000000";
ctx.fillText(label, x1, y1+18);
});
}
}
</script>
</body>
</html>