<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>摄像头拍照</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<video id=‘video‘></video>
<canvas id="canvas"></canvas>
<img id="image">
</head>
<body>
<script>
var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
if (getUserMedia) {
navigator.getUserMedia({ audio: true, video: { width: 90, height: 120 } },
function(stream) {
var video = document.querySelector(‘video‘);
video.src = window.URL.createObjectURL(stream);
video.onloadedmetadata = function(e) {
video.play();
};
},
function(err) {
console.log(err);
}
);
}
document.getElementById(‘video‘).onclick = function(){
var canvas = document.getElementById("canvas");
var context = canvas.getContext("2d");
var video = document.getElementById("video");
context.drawImage(video, 0, 0, 90, 120);
document.getElementById(‘image‘).src = canvas.toDataURL("image/png");
}
</script>
</body>
</html>
原文：https://www.cnblogs.com/huangtonghui/p/9397424.html