ChangeLog

2016-11-16
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* Bugs in the previous version were fixed. std::vector was removed from the API because it can cause error.

2016-11-10
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* The API was updated. std::vector was involved.
* The functions can be called in multiple threads at the same time.

2016-10-6
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* The algorithm has been speeded up greatly (2x to 3x). 
* The true positive rates (FDDB) have been improved 1% to 2% at FP=100.
* Multi-core parallelization has been disabled. The detection time is still the same.

2016-9-16
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* Speedup again.
* Change function name facedetect_frontal_tmp() to facedetect_frontal_surveillance(). This function now uses a new trained classifier which can achieve a higher detection speed.

2016-6-28
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* 64-bit dll added since there are so many users request it.
* An easter egg is hidden in the 64-bit dll. Can you find it?

2016-6-8
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* Speedup 1.2x
* Added an experimental function facedetect_frontal_tmp(). The function can gain a higher detection rate in video surveillance.