mirror of
https://github.com/opencv/opencv.git
synced 2024-12-16 02:19:12 +08:00
69 lines
1.9 KiB
HTML
69 lines
1.9 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>Image Canny Example</title>
|
|
<link href="js_example_style.css" rel="stylesheet" type="text/css" />
|
|
</head>
|
|
<body>
|
|
<h2>Image Canny Example</h2>
|
|
<p>
|
|
<canvas> elements named <b>canvasInput</b> and <b>canvasOutput</b> have been prepared.<br>
|
|
Click <b>Try it</b> button to see the result. You can choose another image.<br>
|
|
You can change the code in the <textarea> to investigate more.
|
|
</p>
|
|
<div>
|
|
<div class="control"><button id="tryIt" disabled>Try it</button></div>
|
|
<textarea class="code" rows="9" cols="100" id="codeEditor" spellcheck="false">
|
|
</textarea>
|
|
<p class="err" id="errorMessage"></p>
|
|
</div>
|
|
<div>
|
|
<table cellpadding="0" cellspacing="0" width="0" border="0">
|
|
<tr>
|
|
<td>
|
|
<canvas id="canvasInput"></canvas>
|
|
</td>
|
|
<td>
|
|
<canvas id="canvasOutput"></canvas>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<div class="caption">canvasInput <input type="file" id="fileInput" name="file" accept="image/*" /></div>
|
|
</td>
|
|
<td>
|
|
<div class="caption">canvasOutput</div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<script src="utils.js" type="text/javascript"></script>
|
|
<script id="codeSnippet" type="text/code-snippet">
|
|
let src = cv.imread('canvasInput');
|
|
let dst = new cv.Mat();
|
|
cv.cvtColor(src, src, cv.COLOR_RGB2GRAY, 0);
|
|
// You can try more different parameters
|
|
cv.Canny(src, dst, 50, 100, 3, false);
|
|
cv.imshow('canvasOutput', dst);
|
|
src.delete(); dst.delete();
|
|
</script>
|
|
<script type="text/javascript">
|
|
let utils = new Utils('errorMessage');
|
|
|
|
utils.loadCode('codeSnippet', 'codeEditor');
|
|
utils.loadImageToCanvas('lena.jpg', 'canvasInput');
|
|
utils.addFileInputHandler('fileInput', 'canvasInput');
|
|
|
|
let tryIt = document.getElementById('tryIt');
|
|
tryIt.addEventListener('click', () => {
|
|
utils.executeCode('codeEditor');
|
|
});
|
|
|
|
utils.loadOpenCv(() => {
|
|
tryIt.removeAttribute('disabled');
|
|
});
|
|
</script>
|
|
</body>
|
|
</html>
|