opencv 头发识别
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了opencv 头发识别相关的知识,希望对你有一定的参考价值。
怎样通过二值化将图像中的人的头发分割出来???
参考技术A HOG特征结合SVM或者Adaboost训练Haar特征,来得到人头部的分类器,将人头部检测出来。然后使用HSV颜色特征区分头发和面部。 参考技术B 我只能说这是个技术活你得上专业网站看看。因为发型太多了要总结特征难。opencv 能识别眼睛吗
参考技术A 可以啊。给你个代码人眼睛识别:
#include "stdafx.h"
#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#ifdef _EiC
#define WIN32
#endif
static CvMemStorage* storage = 0;
static CvHaarClassifierCascade* cascade = 0;
void detect_and_draw( IplImage* image );
const char* cascade_name =
"haarcascade_eye.xml";//人脸检测分类器
int main( int argc, char** argv )
CvCapture* capture = 0;
IplImage *frame, *frame_copy = 0;
int optlen = strlen("--cascade=");
const char* input_name;
if( argc > 1 && strncmp( argv[1], "--cascade=", optlen ) == 0 )
cascade_name = argv[1] + optlen;
input_name = argc > 2 ? argv[2] : 0;
else
cascade_name = "C:/OpenCV2.0/data/haarcascades/haarcascade_eye.xml";//分类器路径
input_name = argc > 1 ? argv[1] : 0;
cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
if( !cascade )//如果没有找到分类器,输出以下
fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
fprintf( stderr,
"Usage: facedetect --cascade=\"<cascade_path>\" [filename|camera_index]\n" );
return -1;
storage = cvCreateMemStorage(0);
capture = cvCaptureFromCAM( !input_name ? 0 : input_name[0] - '0' );//读取摄像头
if(!capture)//如果没有摄像头读取视频文件
capture = cvCaptureFromAVI("检测.avi");
cvNamedWindow( "result", 1);//创建窗口
if( capture )
for(;;)
if( !cvGrabFrame( capture ))//从摄像头中抓取帧
break;
frame = cvRetrieveFrame( capture );//读取上边抓取的帧
if( !frame )
break;
if( !frame_copy )
frame_copy = cvCreateImage( cvSize(frame->width,frame->height),
IPL_DEPTH_8U, frame->nChannels );
if( frame->origin == IPL_ORIGIN_TL )
cvCopy( frame, frame_copy, 0 );
else
cvFlip( frame, frame_copy, 0 );
detect_and_draw( frame_copy );
if( cvWaitKey( 10 ) >= 0 )
break;
cvReleaseImage( &frame_copy );
cvReleaseCapture( &capture );
else//没检测到视频文件或者摄像头
const char* filename = (char*)"检测.jpg";//读图片
IplImage* image = cvLoadImage( filename, 1 );
if( image )
detect_and_draw( image );
cvWaitKey(0);
cvReleaseImage( &image );
else
FILE* f = fopen( filename, "rt" );
if( f )
char buf[1000+1];
while( fgets( buf, 1000, f ) )
int len = (int)strlen(buf);
while( len > 0 && isspace(buf[len-1]) )
len--;
buf[len] = '\0';
image = cvLoadImage( buf, 1 );
if( image )
detect_and_draw( image );
cvWaitKey(0);
cvReleaseImage( &image );
fclose(f);
cvDestroyWindow("result");
return 0;
void detect_and_draw( IplImage* img )
static CvScalar colors[] =
0,0,255,
0,128,255,
0,255,255,
0,255,0,
255,128,0,
255,255,0,
255,0,0,
255,0,255
;
double scale = 1.3;
IplImage* gray = cvCreateImage( cvSize(img->width,img->height), 8, 1 );
IplImage* small_img = cvCreateImage( cvSize( cvRound (img->width/scale),
cvRound (img->height/scale)),
8, 1 );
int i;
cvCvtColor( img, gray, CV_BGR2GRAY );
cvResize( gray, small_img, CV_INTER_LINEAR );
cvEqualizeHist( small_img, small_img );
cvClearMemStorage( storage );
if( cascade )
double t = (double)cvGetTickCount();
CvSeq* faces = cvHaarDetectObjects( small_img, cascade, storage,
1.1, 2, 0/*CV_HAAR_DO_CANNY_PRUNING*/,
cvSize(30, 30) );//检测人脸返回矩形人脸
t = (double)cvGetTickCount() - t;
printf( "detection time = %gms\n", t/((double)cvGetTickFrequency()*1000.) );
for( i = 0; i < (faces ? faces->total : 0); i++ )//找到矩形中心,把矩形转化为圆形
CvRect* r = (CvRect*)cvGetSeqElem( faces, i );
CvPoint center;
int radius;
center.x = cvRound((r->x + r->width*0.5)*scale);
center.y = cvRound((r->y + r->height*0.5)*scale);
radius = cvRound((r->width + r->height)*0.25*scale);
cvCircle( img, center, radius, colors[i%8], 3, 8, 0 );
cvShowImage( "result", img );
cvReleaseImage( &gray );
cvReleaseImage( &small_img );
本回答被提问者和网友采纳 参考技术B 这个库里面好像就有吧。。。
以上是关于opencv 头发识别的主要内容,如果未能解决你的问题,请参考以下文章