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Index › Programming Questions & Help › Video Capture,  Movie Playback,  Vision Libraries › Face Detect Library (Mac) – feeding it images
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Face Detect Library (Mac) – feeding it images (Read 1275 times)
littlebananas
Face Detect Library (Mac) – feeding it images
May 7th, 2008, 7:57pm  
Hi,

I've been using Jaegon Lee's Face Detect library for live camera input and it works wonderfully.

However, I am attempting another project that requires just the use of the face detection on still images, i.e. PImage.

Has anyone figured out a way to do that?


I have taken a look at Bryan Chung's PC version, and tried to compile an opencv jnilib on my mac using xcode. So far I've been unsuccessful in compiling and I wonder if anyone here has a solution.

All I need is to do face detection on a PImage on my mac.


Please help!
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ascorbin
Re: Face Detect Library (Mac) – feeding it images
Reply #1 - May 22nd, 2008, 12:35am  
Ya! help me too!
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littlebananas
Re: Face Detect Library (Mac) – feeding it images
Reply #2 - May 22nd, 2008, 1:47am  
ascorbin,

i've managed to do a successful re-compile of Bryan Chung's source code that he put up on his blog. it works exactly the same as his original PC version.

unfortunately i do not have the compiled jni and jar file now as my macbookpro is now running in an installation. if you can hang on for a couple of days i'll be able to get access to it and send it to you.

if you want to roll your own, it was a matter of getting the C includes to access the header files. i used the xcode java native library template as a starting point, and then replaced the function calls with Bryan's c source. the tricky part was getting the project to build properly with the opencv includes.

will post a reply here in a couple of days when i get access to the files.

...and thanks to Bryan for putting up your source code, this would have taken far longer without something to start with.
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ascorbin
Re: Face Detect Library (Mac) – feeding it images
Reply #3 - May 22nd, 2008, 9:47am  
Hey thank you very nice!

greetings ascorbin
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littlebananas
Re: Face Detect Library (Mac) – feeding it images
Reply #4 - May 25th, 2008, 5:41pm  
ascorbin,

here's the link:
http://dm.risd.edu/~akhoo/p5/pfacedetect_mac.zip


hope this helps!
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ascorbin
Re: Face Detect Library (Mac) – feeding it images
Reply #5 - May 25th, 2008, 8:26pm  
thank you! but it gives me this error:

OpenCV ERROR: Null pointer (Invalid classifier cascade)

in function cvHaarDetectObjects, /Users/david/Work/Development/Net/opencv/xcode/../cv/src/cvhaar.cpp(890)
Terminating the application...
/Users/david/Work/Development/Net/opencv/xcode/../cxcore/src/cxerror.cpp:360: failed assertion `0'

looks like an absolute path on your computer

EDIT: Hurra! Now it works! Thank you a lot (I had to put haarcascade into the data folder)

greetings
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« Last Edit: May 26th, 2008, 5:35am by ascorbin »  
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littlebananas
Re: Face Detect Library (Mac) – feeding it images
Reply #6 - Jun 4th, 2008, 12:52am  
sorry i didn't get back to you sooner, it's been a long week.

glad you managed to get it working. i forgot to mention in my earlier post that you can specify different haarcascade xml files to use. Both absolute and relative paths will work.

detect = new PFaceDetect(papplet, imgW, haarPathandFilename);


cheers
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