tld->processimage(cv::Mat) is really slow at the first frame

[davidkovaccs]

Hi!

I'm trying to use the openTLD lib in an iOS apllication. First I detect a face with a Face detector and want to track it. After I detected a face call SelectObject on tld with a grayscaled image.
From the next Frame I'm calling tld->imagePrcess(rgbImage) to process the image/track the face. The first call of the imageProcess tooks 5 minutes and I can't figure out what am I doing wrong. After that every frame is computed in 100ms. What can be the problem?