mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.9 KiB
68 lines
1.9 KiB
<!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>
|
|
|