Looks like a very useful project, however I’m still unable to compile MyCvDetectHaarObjects.cpp.

1) I have successfully compiled projects including the static libraries using the methods detailed by Yoshimasa Niwa with no errors.

2) I have included the following line for library linking (in simulator, I also have the relevant device line for that build setting):
$(SRCROOT)/opencv_simulator/lib/libml.a $(SRCROOT)/opencv_simulator/lib/libhighgui.a $(SRCROOT)/opencv_simulator/lib/libcvaux.a -lstdc++ -lz $(SRCROOT)/opencv_simulator/lib/libcv.a $(SRCROOT)/opencv_simulator/lib/libcxcore.a

3) and for headers (again for the simulator build setting):
$(SRCROOT)/opencv_simulator/include
4) And I have included all the .h files in the project.

The errors are all based on the macros used in the file:
/Users/mick/Desktop/otherApps/FaceDetector-fast/FaceDetector1/Classes/mycvHaarDetectObjects.cpp:570: error: jump to label ‘exit’
/Users/mick/Desktop/otherApps/FaceDetector-fast/FaceDetector1/Classes/mycvHaarDetectObjects.cpp:459: error: from here
/Users/mick/Desktop/otherApps/FaceDetector-fast/FaceDetector1/Classes/mycvHaarDetectObjects.cpp:464: error: crosses initialization of ‘int pq3′

Is it possible there’s a build flag (VERY_ROUGH_SEARCH) somewhere that needs to be defined?

Cheers
Mick

So, 480×640 in under a second… wow, that’s pretty exciting!

I’m expecting my 3G s to be delivered in a few days, can’t wait to try it out on the real thing

BTW, if anyone is interested, I ran into an article by Yoshimasa Niwa, in which he provided an overview on compiling and using OpenCV with iPhone. And even better, he provided a complete XCode project, along with iPhone OS-compiled OpenCV libraries in his github repository. Check it out here:
http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en

Vincent

You can expect something like 200-500ms for say a 480×640 image.
The still images captured by the camera are 1200×1600, and the algorithm will run for 1-3 seconds to find a face.
Keep in mind that increasing the scale factor will give faster results, but may not find a face at all…

Roy.

I haven’t gotten a chance to try this out on a device, but you did say your optimizations reduced timings to the range of hundreds of milliseconds – for video feeds at least.

So my question is, if I apply the same optimizations to a single image (so no way to use the ROI from a previous detection), what kind of timing could I expect on a real device (like 3Gs)?

Thanks again!

Vincent

I used PAD_FACE = 40 and PAD_FACE_2 is just a multiplication by 2 (80).
I added a missing file to the SVN repo of this project: facedetect.c it constains the detect_and_draw function and all constants, etc.

Roy.

Thanks for this post, it’s really helpful,

Bill

Here are the error messages from Xcoder:
—-
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp: In function ‘MyCvHidHaarClassifierCascade* myicvCreateHidHaarClassifierCascade(CvHaarClassifierCascade*)’:
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:158: error: ’sprintf’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:190: error: ’sprintf’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:270: error: ‘cvAlignPtr’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp: At global scope:
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:429: error: expected constructor, destructor, or type conversion before ‘int’
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:581: error: expected constructor, destructor, or type conversion before ‘void’
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:826: error: ‘CV_IMPL’ does not name a type
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:5:1: warning: this is the location of the previous definition
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:158: error: ’sprintf’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:190: error: ’sprintf’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:270: error: ‘cvAlignPtr’ was not declared in this scope
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp: At global scope:
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:429: error: expected constructor, destructor, or type conversion before ‘int’
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:581: error: expected constructor, destructor, or type conversion before ‘void’
/Users/imac/Desktop/Untitled/Classes/mycvHaarDetectObjects.cpp:826: error: ‘CV_IMPL’ does not name a type
Build failed (6 errors, 3 warnings)
—

Could you plz help me to figure it out?
Thanks a lot!