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- <style>
- video{
- filter:contrast(24244);
- }
- canvas{
- filter:invert(180%);
- }
- </style>
- <center>
- <body bgcolor="black">
- <video id="video" width="640" height="480" autoplay></video>
- <canvas id="canvas" width="640" height="480"></canvas>
- <script>
- alert('Move The Mouse Around Inside Of The Webcam Image To Check If A Person/Animal Is Visible!!');
- document.addEventListener("DOMContentLoaded", function() {
- var canvas = document.getElementById('canvas');
- var context = canvas.getContext('2d');
- var video = document.getElementById('video');
- var mediaConfig = { video: true,audio:false};
- var errBack = function(e) {
- console.log('An error has occurred!', e)
- };
- if(navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
- navigator.mediaDevices.getUserMedia(mediaConfig).then(function(stream) {
- video.src = window.URL.createObjectURL(stream);
- video.play();
- });
- }
- else if(navigator.getUserMedia) {
- navigator.getUserMedia(mediaConfig, function(stream) {
- video.src = stream;
- video.play();
- }, errBack);
- } else if(navigator.webkitGetUserMedia) {
- navigator.webkitGetUserMedia(mediaConfig, function(stream){
- video.src = window.webkitURL.createObjectURL(stream);
- video.play();
- }, errBack);
- } else if(navigator.mozGetUserMedia) {
- navigator.GetUserMedia(mediaConfig, function(stream){
- video.src = window.URL.createObjectURL(stream);
- video.play();
- }, errBack);
- }
- var cct=getBase64Image(video)
- var ctt=getBase64Image(video);
- document.addEventListener('keydown', function() {
- context.drawImage(video, 0, 0, 640, 480);
- ctt=getBase64Image(video);
- if(ctt<539909){
- }else{
- alert('Person In Frame!!');
- }
- });
- }, false);
- function getBase64Image(img) {
- var canvas = document.createElement("canvas");
- canvas.width = img.width;
- canvas.height = img.height;
- var ctx = canvas.getContext("2d");
- ctx.drawImage(img, 0, 0);
- var dataURL = canvas.toDataURL("image/png");
- return dataURL.length;
- }
- </script>
- </body>
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