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本帖最后由 linbin250 于 2017-7-9 23:00 编辑
网上找到2015年"于仕琪"的帖子 "免费、高性能的人脸检测库"
http://www.opencv.org.cn/forum.php?mod=viewthread&tid=34155
于仕琪，博士，助理研究员，深圳大学副教授，OpenCV中文站站长。
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2015年12月7日更新：
三个人脸检测函数再次提速，multiview_reinforce()提速为上一版本的2.3倍，已经比OpenCV的正面人脸检测还要快！要知道其他两个函数比这个更快哦，最快的达到232FPS！
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2015年4月22日更新：
我们的免费人脸检测库再次更新：①正面人脸检测的角度范围从[-40, 40]度提升到[-60,60]度，检测角度变大但计算量不增加；②多视角人脸检测速度提升2倍！
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本团队雕琢多年的人脸检测库现以MIT协议发布 ,供商业和非商业无限制使用,包含正面和多视角人脸检测两个算法.优点:速度快(OpenCV haar+adaboost的2-3倍), 准确度高 (FDDB非公开类评测排名第二），能估计人脸角度. 例子看下图. 希望能帮助到有需要的个人和公司。
这个库比OpenCV自带的人脸检测强大一个数量级！纯C语言生成的二进制库，不依赖任何其他的库。接口更简洁，就一个函数。正面人脸检测，多视角人脸检测的API分别如下：
int * facedetect_frontal( unsigned char * gray_image_data, int width, int height, int step,
float scale,
int min_neighbors,
int min_size,
int max_size=0);
int * facedetect_multiview( unsigned char * gray_image_data, int width, int height, int step,
float scale,
int min_neighbors,
int min_size,
int max_size=0);
DLL库的下载地址：https://github.com/ShiqiYu/libfacedetection
转发到论坛的下载：
该人脸识别库在百度上找了很久，没有成功移植到C#的方法，认真学习后，成功移植，并成功移植到C#上。例子是VS2010， NET4.0编译环境
//下面是库的声明
[DllImport("libfacedetect.dll", CharSet = CharSet.Auto, EntryPoint = "?facedetect_frontal@@YAPAHPAE0HHHMHHHH@Z", CallingConvention = CallingConvention.Cdecl)]
unsafe public static extern byte* facedetect_frontal(
[In, Out]byte* result_buffer,
[In, Out]byte* gray_image_data,
int width, int height, int step,
float scale, //scale factor for scan windows
int min_neighbors, //how many neighbors each candidate rectangle should have to retain it
int min_object_width, //Minimum possible face size. Faces smaller than that are ignored.
int max_object_width = 0, //Maximum possible face size. Faces larger than that are ignored. It is the largest posible when max_object_width=0.
int doLandmark = 0); // landmark detection
[DllImport("libfacedetect.dll", CharSet = CharSet.Auto, EntryPoint = "?facedetect_frontal_surveillance@@YAPAHPAE0HHHMHHHH@Z", CallingConvention = CallingConvention.Cdecl)]
unsafe public static extern byte* facedetect_frontal_surveillance(
[In, Out]byte* result_buffer, //buffer memory for storing face detection results, !!its size must be 0x20000 Bytes!!
[In, Out]byte* gray_image_data, int width, int height, int step, //input image, it must be gray (single-channel) image!
float scale, //scale factor for scan windows
int min_neighbors, //how many neighbors each candidate rectangle should have to retain it
int min_object_width, //Minimum possible face size. Faces smaller than that are ignored.
int max_object_width = 0, //Maximum possible face size. Faces larger than that are ignored. It is the largest posible when max_object_width=0.
int doLandmark = 0); // landmark detection
[DllImport("libfacedetect.dll", CharSet = CharSet.Auto, EntryPoint = "?facedetect_multiview@@YAPAHPAE0HHHMHHHH@Z", CallingConvention = CallingConvention.Cdecl)]
unsafe public static extern byte* facedetect_multiview(
[In, Out]byte* result_buffer, //buffer memory for storing face detection results, !!its size must be 0x20000 Bytes!!
[In, Out]byte* gray_image_data, int width, int height, int step, //input image, it must be gray (single-channel) image!
float scale, //scale factor for scan windows
int min_neighbors, //how many neighbors each candidate rectangle should have to retain it
int min_object_width, //Minimum possible face size. Faces smaller than that are ignored.
int max_object_width = 0, //Maximum possible face size. Faces larger than that are ignored. It is the largest posible when max_object_width=0.
int doLandmark = 0); // landmark detection
[DllImport("libfacedetect.dll", CharSet = CharSet.Auto, EntryPoint = "?facedetect_multiview_reinforce@@YAPAHPAE0HHHMHHHH@Z", CallingConvention = CallingConvention.Cdecl)]
unsafe public static extern byte* facedetect_multiview_reinforce(
[In, Out]byte* result_buffer, //buffer memory for storing face detection results, !!its size must be 0x20000 Bytes!!
[In, Out]byte* gray_image_data, int width, int height, int step, //input image, it must be gray (single-channel) image!
float scale, //scale factor for scan windows
int min_neighbors, //how many neighbors each candidate rectangle should have to retain it
int min_object_width, //Minimum possible face size. Faces smaller than that are ignored.
int max_object_width = 0, //Maximum possible face size. Faces larger than that are ignored. It is the largest posible when max_object_width=0.
int doLandmark = 0); // landmark detection
C#例子程序 VS2010编程环境 .NET4.0
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发表于 2017-7-9 23:00:00
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