Duration of Face detection

asked 2013-02-28 03:15:55 -0600

Chakan
1 ●1 ●1

Just started using the opencv 2.4.4 got the face tracking and detection to work fine along with the eye (with glasses detection). This is using the samples provided.

My next question is how do I track the amount of time the face is being detected along with the eyes?

Basically what I need to do is start a timer when they eyes are detected and when they are no longer detected calculate the timespan between the 2 instances?

Is there any sample code that does this so I can have a look how it's done?

Thanks

answered 2013-02-28 04:04:17 -0600

berak
32993 ●7 ●81 ●312

updated 2013-02-28 04:05:16 -0600

i'm using opencv's timing functions for that:

int64 t0 = cv::getTickCount();
// do something
int64 t1 = cv::getTickCount();
doubles seconds = double( t1 - t0 ) / cv::getTickFrequency();
cerr << "took : " << seconds << endl;

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Thanks will look into this!

Chakan ( 2013-02-28 04:38:12 -0600 )edit

Hi A follow up question, does OpenCV already have built into the framework a variable that tracks the time the face was detected? So it detects a face at 1:05:05 and then doesn't detect the same face at 1:05:20 which would mean it duration of detection was 20 seconds?

Is there a variable built into the face detection module already?

Chakan ( 2013-02-28 23:42:29 -0600 )edit

ah, no. not builtin. you've got to do this yourself. but it makes kinda sense, i say

berak ( 2013-03-01 01:28:38 -0600 )edit

Ok thanks, just checking that it wasn't there already. Will work on getting it sorted.

Chakan ( 2013-03-01 02:12:51 -0600 )edit

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