js 摄像头拍照 

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>调用摄像头拍照</title>
</head>

<body>
    <video id="video" width="640" height="480"  autoplay></video>
    <button onclick="start()">开始</button>
    <button onclick="paizao()">拍照</button>
    <canvas id="canvas" width="640" height="480" ></canvas>
    <script>
        function start() {
            navigator.mediaDevices.getUserMedia({ video: true }).then(stream => {
                document.getElementById("video").srcObject = stream
            })
        }
        function paizao() {
            var canvas = document.getElementById("canvas");            
            var video = document.getElementById("video")
            canvas.getContext("2d").drawImage(video, 0, 0, canvas.width, canvas.height);            
        }
    
    </script>
</body>

</html>

 

posted @ 2023-01-30 23:23  到此灬一游丿  阅读(70)  评论(0)    收藏  举报