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Open Source Computer Vision Library
https://opencv.org/
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59 lines
1.8 KiB
59 lines
1.8 KiB
7 years ago
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Image Canny Example</title>
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<link href="js_example_style.css" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<h2>Image Canny Example</h2>
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<p>
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<canvas> elements named <b>canvasInput</b> and <b>canvasOutput</b> have been prepared.<br>
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Click <b>Try it</b> button to see the result. You can choose another image.<br>
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You can change the code in the <textarea> to investigate more.
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</p>
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<div>
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<div class="control"><button id="tryIt" disabled>Try it</button></div>
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<textarea class="code" rows="9" cols="100" id="codeEditor" spellcheck="false">
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</textarea>
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<p class="err" id="errorMessage"></p>
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</div>
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<div>
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<div class="inputoutput">
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<canvas id="canvasInput"></canvas>
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<div class="caption">canvasInput <input type="file" id="fileInput" name="file" /></div>
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</div>
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<div class="inputoutput">
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<canvas id="canvasOutput"></canvas>
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<div class="caption">canvasOutput</div>
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</div>
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</div>
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<script src="utils.js" type="text/javascript"></script>
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<script id="codeSnippet" type="text/code-snippet">
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let src = cv.imread('canvasInput');
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let dst = new cv.Mat();
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cv.cvtColor(src, src, cv.COLOR_RGB2GRAY, 0);
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// You can try more different parameters
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cv.Canny(src, dst, 50, 100, 3, false);
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cv.imshow('canvasOutput', dst);
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src.delete(); dst.delete();
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</script>
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<script type="text/javascript">
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let utils = new Utils('errorMessage');
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utils.loadCode('codeSnippet', 'codeEditor');
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utils.loadImageToCanvas('lena.jpg', 'canvasInput');
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utils.addFileInputHandler('fileInput', 'canvasInput');
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let tryIt = document.getElementById('tryIt');
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tryIt.addEventListener('click', () => {
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utils.executeCode('codeEditor');
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});
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utils.loadOpenCv(() => {
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tryIt.removeAttribute('disabled');
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});
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</script>
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</body>
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</html>
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