faces.html~

来自「200704015人脸数据库＿内含多达５００张人脸图片」· HTML~ 代码 · 共 15 行

<h1>Face detection</h1>

These are some quick experiemnts on face detection, the code was written from scratch in about 2 hours, using this group photo to test:
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<img src="group2.jpg">
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One of the guys on the back row (4th from the right)  is cut out as an exemplar template.  A crude double-or loop is used to search for the template at all horizontal and vertical positions (no scaling or rotation).  It takes about 5 minutes to run in matlab.  Template checking is done by normalising the histogram means and variences for each candidate area, and for the template.  A threshold output is used, and the active areas are reduced to points with erosion.  The output looks like this:
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<img src="out.bmp">
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Note it doesnt do too well on bald heads, beards, long hair, people standing sideways-on, and people at the front, whose scales are different.
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The only fiddle parameter used was the activation threshold.
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The matlab code is available, contact me if you're interested.