I use geUserMedia() to capture image from webcam Intro.
Best resolution that I get is 640 X 480, but I have HD webcam that records video with 1280 X 720, takes a picture 2592 X 1944.
How can I capture High Resolution photos?
Here is one sample of code. It doesn't care about canvas size:
<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>
http://www.html5rocks.com/en/tutorials/getusermedia/intro/
=> Setting media constraints (resolution, height, width)