console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>实时文档扫描 - 矩形检测</title>
    <style>
    </style>
</head>

<body>
    <video id="video" width="320" height="240"></video>
    <canvas id="canvas" width="320" height="240"></canvas> <!-- original video -->
    <canvas id="result" width="320" height="240"></canvas> <!-- highlighted video -->

    <script src="https://docs.opencv.org/4.7.0/opencv.js"></script>
    <script src="https://cdn.jsdelivr.net/gh/ColonelParrot/jscanify@master/src/jscanify.min.js"></script>
    <script>
        const scanner = new jscanify();
        const canvasCtx = canvas.getContext("2d");
        const resultCtx = result.getContext("2d");

        navigator.mediaDevices.getUserMedia({
            video: {
                width: 'max',
                height: 'max',
                facingMode: 'environment',
            }
        }).then((stream) => {
            video.srcObject = stream;
            video.muted = true;
            video.onloadedmetadata = () => {
                setInterval(() => {
                    canvasCtx.drawImage(video, 0, 0);
                    const resultCanvas = scanner.highlightPaper(canvas);
                    resultCtx.drawImage(resultCanvas, 0, 0);
                }, 10);
            };

            video.play();
        });
    </script>
</body>

</html>