我使用geUserMedia()从网络摄像头Intro捕获图像。我得到捕获高分辨率视频/图像html5
最佳分辨率为640 X 480,但我有高清网络摄像头与1280 X 720 记录视频, 拍照2592 X 1944年。
如何捕获高分辨率照片?
这是一个代码示例。它不关心画布大小:
<video autoplay id="vid" style="display:none;"></video>
<canvas id="canvas" width="1280" height="720" style="border:1px solid #d3d3d3;"></canvas><br>
<button onclick="snapshot()">Take Picture</button>
<script type="text/javascript">
var video = document.querySelector("#vid");
var canvas = document.querySelector('#canvas');
var ctx = canvas.getContext('2d');
var localMediaStream = null;
var onCameraFail = function (e) {
console.log('Camera did not work.', e);
};
function snapshot() {
if (localMediaStream) {
ctx.drawImage(video, 0, 0);
}
}
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
window.URL = window.URL || window.webkitURL;
navigator.getUserMedia({video:true}, function (stream) {
video.src = window.URL.createObjectURL(stream);
localMediaStream = stream;
}, onCameraFail);
</script>
您可以使用媒体捕获API获取全分辨率图片。在这里看到答案; https://stackoverflow.com/a/36473227/200987 – oligofren 2017-11-06 13:23:13