【HandVu学习】HandVu使用Socket和线程进行状态读取和绘制
作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/
/**
* HandVu - a library for computer vision-based hand gesture
* recognition.
* Copyright (C) 2004 Mathias Kolsch, matz@cs.ucsb.edu
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* $Id: hv_OpenCV.cpp,v 1.15 2006/01/03 21:44:15 matz Exp $
**/
/*********************************
2009.3.15 gnuhpc@gmail.com
Show How to get the hand state using the socket in a thread.
Copyright (C) GPL
***********************************/
#ifdef WIN32
#include <windows.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/time.h>
#include <errno.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <string.h>
#include <netinet/in.h>
#include <cv.h>
#include <highgui.h>
#include <ctype.h>
#include "HandVu.h"
#define BILLION 1000000000L
#define BUFFSIZE 256
IplImage *capture_image = 0;
IplImage *display_image = 0;
IplImage *routing_image = 0;
bool async_processing = false;
int num_async_bufs = 30;
IplImage *m_async_image = 0;
int m_async_bufID = -1;
bool sync_display = true;
CvPoint origin;
int select_object = 0;
int sel_area_left=0, sel_area_top=0, sel_area_right=0, sel_area_bottom=0;
bool correct_distortion = false;
hvState state;
int c;
void* thread(void *arg)
{
int socketfd;
int len;
struct sockaddr_in address;
int result;
char buffer[256];
int received = 0;
if(!(socketfd = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP)))
{
perror("Error when creating socket!/n");
pthread_exit(NULL);
}
memset(&address,0,sizeof(address));
address.sin_family = AF_INET;
address.sin_addr.s_addr= inet_addr("127.0.0.1");
address.sin_port = htons(1394);
if( connect(socketfd,(struct sockaddr *)&address,sizeof(address))<0)
{
perror("Error when connecting socket!/n");
pthread_exit(NULL);
}
while(1)
{
int bytes=0;
if( (bytes = recv(socketfd,buffer,BUFFSIZE-1,0))<1 )
{
perror("Error When Reading the socket!/n");
pthread_exit(NULL);
}
buffer[bytes]='/0';
printf("%s/n",buffer);
if( c==27 )
{
break;
pthread_exit(NULL);
}
}
}
static void myhandler(int s)
{
cvZero(routing_image);
}
void OnMouse( int event, int x, int y, int /*flags*/, void* /*params*/ )
{
if( !capture_image )
return;
if( capture_image->origin )
y = capture_image->height - y;
if( select_object )
{
sel_area_left = MIN(x,origin.x);
sel_area_top = MIN(y,origin.y);
sel_area_right = sel_area_left + CV_IABS(x - origin.x);
sel_area_bottom = sel_area_top + CV_IABS(y - origin.y);
sel_area_left = MAX( sel_area_left, 0 );
sel_area_top = MAX( sel_area_top, 0 );
sel_area_right = MIN( sel_area_right, capture_image->width );
sel_area_bottom = MIN( sel_area_bottom, capture_image->height );
if( sel_area_right-sel_area_left > 0 && sel_area_bottom-sel_area_top> 0 )
hvSetDetectionArea(sel_area_left, sel_area_top,
sel_area_right, sel_area_bottom);
}
switch( event )
{
case CV_EVENT_LBUTTONDOWN:
origin = cvPoint(x,y);
sel_area_left = sel_area_right = x;
sel_area_top = sel_area_bottom = y;
select_object = 1;
break;
case CV_EVENT_LBUTTONUP:
select_object = 0;
break;
}
}
void showFrame(IplImage* img, hvAction action, hvState state)
{
int underline;
CvFont font;
CvSize textsize;
char text[256];
cvInitFont(&font,CV_FONT_HERSHEY_PLAIN,1.0,1.0,0.0,1,8);
if (action==HV_DROP_FRAME) {
// HandVu recommends dropping the frame entirely
// printf("HandVuFilter: dropping frame/n");
return;
} else if (action==HV_SKIP_FRAME) {
// HandVu recommends displaying the frame, but not doing any further
// processing on it - keep going
// printf("HandVuFilter: supposed to skip frame/n");
} else if (action==HV_PROCESS_FRAME) {
// full processing was done and is recommended for following steps;
// keep going
//printf("HandVuFilter: processed frame/n");
} else {
assert(0); // unknown action
}
sprintf(text,"x=%f,y=%f",100.0*state.center_xpos,100.0*state.center_ypos);
cvGetTextSize( text, &font, &textsize, &underline );
cvPutText(img,text,cvPoint(img->width/2,img->height-10),
&font,CV_RGB(0,255,0));
cvShowImage( "HandVu", img );
cvCircle(routing_image,cvPoint(300.0*state.center_xpos,300.0*state.center_ypos),1,CV_RGB(255,0,0),-1,CV_AA,0);
cvShowImage("Routing",routing_image);
}
int main( int argc, char** argv )
{
int t=123;//For testing
int retv;
int flag1=1;
pthread_t id1;
CvCapture* capture = 0;
struct itimerval value;
struct sigaction act;
act.sa_handler = myhandler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
sigaction(SIGPROF,&act,NULL);
value.it_interval.tv_sec=1;
value.it_interval.tv_usec=0;
value.it_value = value.it_interval;
if((setitimer(ITIMER_PROF,&value,NULL)==-1))
{
perror("Set timer Error!/n");
return -1;
}
if (argc<2) {
printf("you need to specify a conductor file as first argument/n");
printf("for example: ../config/default.conductor/n");
return -1;
}
string conductor_fname(argv[1]);//声明配置参数的对象
printf("will load conductor from file:/n%s/n", conductor_fname.c_str());//屏显提示
/*是否设定特定的摄像头，并初始化摄像头 */
if( argc == 2 || argc == 3) {
int num = 0;
if (argc==3) {
num = atoi(argv[2]);
}
capture = cvCaptureFromCAM( num );
if (!capture) {
capture = cvCaptureFromAVI( argv[2] );
}
}
if( !capture )
{
fprintf(stderr,"Could not initialize capturing through OpenCV./n");
return -1;
}
/* 屏显提示 */
printf( "Hot keys: /n"
"/tESC - quit the program/n"
"/tr - restart the tracking/n"
"/t0-3 - set the overlay (verbosity) level/n"
"use the mouse to select the initial detection area/n" );
routing_image = cvCreateImage(cvSize(300,300),IPL_DEPTH_8U,3 );
//设定采集图像大小
int p = 0; // according to docs, these calls don't work in OpenCV beta 4 yet
p = cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, 640);
p = cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT, 480);
//获取一帧
capture_image = cvQueryFrame( capture );
if ( !capture_image ) {
fprintf(stderr,"Could not retrieve image through OpenCV./n");
return -1;
}
/* allocate all the buffers */
CvSize size = cvGetSize(capture_image);
hvInitialize(size.width, size.height);//初始化要分析的图像大小
hvLoadConductor(conductor_fname);//装载参数
hvStartRecognition();//开始识别
hvSetOverlayLevel(2);//设置识别的覆盖区级别
/* 设置鼠标事件的回调参数 */
cvSetMouseCallback( "HandVu", OnMouse );
/* 设置窗口 */
int success1 = cvNamedWindow( "HandVu", 1 );
int success2 = cvNamedWindow( "Routing", 1 );
cvResizeWindow("Routing",300,300);
cvMoveWindow("Routing",1000,0);
fprintf(stderr, "initialized highgui/n");
if ((success1!=1)&&(success2!=1)) {
printf("can't open window - did you compile OpenCV with highgui support?");
return -1;
}
hvStartGestureServer(1394,10);
retv = pthread_create(&id1,NULL,thread,NULL);
if( retv )
{
perror("Error when creating a thread!/n");
return -1;
}
retv = pthread_detach(id1);
if( retv )
{
perror("Error when deteching a thread!/n");
return -1;
}
for (;;) {
// synchronous processing in HandVu
// ------- main library call ---------
hvAction action = HV_INVALID_ACTION;
action = hvProcessFrame(capture_image);
// -------
hvGetState(0, state);
showFrame(capture_image, action,state);
c = cvWaitKey(10);
if( c == 27 || c == 'q' )
break;
switch( c )
{
case 'r':
hvStopRecognition();
hvStartRecognition();
break;
case '0':
hvSetOverlayLevel(0);
break;
case '1':
hvSetOverlayLevel(1);
break;
case '2':
hvSetOverlayLevel(2);
break;
case '3':
hvSetOverlayLevel(3);
break;
case 'u':
if (hvCanCorrectDistortion()) {
correct_distortion = !correct_distortion;
hvCorrectDistortion(correct_distortion);
}
break;
default:
;
}
// capture next image
capture_image = cvQueryFrame( capture );
if ( !capture_image ) {
fprintf(stderr,"Could not retrieve image through OpenCV./n");
break;
}
}
cvReleaseCapture( &capture );
cvDestroyWindow("HandVu");
cvDestroyWindow("Routing");
return 0;
}
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