libfacedetection

This is a binary library for face detection in images. The 32-bits dll file is provided for Visual Studio 2010.

examples/libfacedetect-example.cpp shows how to use the library.

Comparison on Windows

Method	Time	FPS	Misc
OpenCV	21.2ms	47.2	Yaw angle: -40 to 40 degrees. Classifier: haarcascade_frontalface_alt.xml
frontal	3.6ms	277.8	Yaw angle: -60 to 60 degrees
multiview	8.8ms	113.6	Yaw angle: -90 to 90 degrees
multiview_reinforce	13.2ms	75.8	Yaw angle: -90 to 90 degrees

• 640x480 image size (VGA), scale=1.2, minimal window size = 48
• Intel(R) Core(TM) i7-4770 CPU @ 3.4GHz
• Multi-core parallelization is enabled for the four methods.

Comparison on ARM

Method	Time	FPS	Misc
frontal	37.6ms	26.6	Yaw angle: -60 to 60 degrees
multiview	107.6ms	9.3	Yaw angle: -90 to 90 degrees
multiview_reinforce	174.8ms	5.7	Yaw angle: -90 to 90 degrees

• 640x480 image size (VGA), scale=1.2, minimal window size = 48
• NVIDIA TK1 "4-Plus-1" 2.32GHz ARM quad-core Cortex-A15 CPU
• Multi-core parallelization is disabled.
• C programming language, and no SIMD instruction is used.

The dll cannot run on ARM. The library should be recompiled from source code for ARM compatibility. If you need the source code, a commercial license is needed.

Evaluation

FDDB: http://vis-www.cs.umass.edu/fddb/index.html

• scale=1.08
• minimal window size = 16
• the heights of the face rectangles are scaled to 1.2 to fit the ground truth data in FDDB.

Author

• Shiqi Yu shiqi.yu@gmail.com Computer Vision Institute, Shenzhen University, China

Contributors

• Shengyin Wu, Shenzhen University, China
• Dong Xu, Shenzhen University, China