How can I can detect and replace a portion of an image using php?

Question

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Face detection in PHP

I want to be able to detect a portion of an image like a person's face in image $filetoReplace and then
replace it by another face in image $fileReplaceWith. Is there any way this can be done in php?

$filetoReplace = 'image/person.jpg';
$fileReplaceWith = 'image/anotherperson.jpg';

PHP, like many other languages, is Turing-complete. This means that it is literally possible to do *anything* (assuming unlimited memory and time). So asking if there is "any way this can be done" is just silly ;) — Niet the Dark Absol, Jan 23 '13 at 06:19
this maybe a good place to start http://php.net/manual/en/book.image.php — Lim H., Jan 23 '13 at 06:19
and this ... http://stackoverflow.com/questions/4159924/face-detection-in-php — Lim H., Jan 23 '13 at 06:20
yes, there is a way this can be done in php. good luck! let us know how it goes. you can close this question now. — Andy Ray, Jan 23 '13 at 06:23

score 1 · Accepted Answer · answered Jan 23 '13 at 06:53

Short answer: Yes

Long answer: Yes, it's possible (how was already mentioned in comments: basically everything is possible), but you won't be able to write the algorithm without knowledge of image processing & pattern recognition; it's actually kinda rocket science :)

So that means, that you'll need to use some library. I would recommend OpenCV which is quite mature open source library built for this purpose (any many others). There is already built-in detector of faces.

I suggest to search for "OpenCV in PHP" to find PHP wrapper for this library and then you'll need to figure out how to pass the image properly to find face(s) in OpenCV in $filetoReplace and how to replace rectange/oval with $fileReplaceWith.

How can I can detect and replace a portion of an image using php?

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