gistfile1.txt

//Generate Positive samples
//File: test_prog.cpp
//You must make a director /positive_data/ where this program could put the pictures in

#include <stdio.h>
#include <unistd.h>
#include <ctime>
#include <iostream>
#include <raspicam/raspicam_cv.h>
using namespace std; 
using namespace cv;



//default capture width and height
//const int FRAME_WIDTH = 640;
//const int FRAME_HEIGHT = 480;
const int FRAME_WIDTH = 128;
const int FRAME_HEIGHT = 96;
const string WindowName = "Image viewer";

#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

int kbhit(void)
{
  struct termios oldt, newt;
  int ch;
  int oldf;

  tcgetattr(STDIN_FILENO, &oldt);
  newt = oldt;
  newt.c_lflag &= ~(ICANON | ECHO);
  tcsetattr(STDIN_FILENO, TCSANOW, &newt);
  oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
  fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

  ch = getchar();

  tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
  fcntl(STDIN_FILENO, F_SETFL, oldf);

  if(ch != EOF)
  {
    ungetc(ch, stdin);
    return 1;
  }

  return 0;
}

 
int main () {
	//JPG File store
	int ret;
	char ch;
	int files_number = 2000;
//	FILE *store_files[files_number];
	FILE *temp_file;
    char filename[20];
	//-------------
	
	int camera_start_up_frames = 100;
 //    FILE *fp[files_number];
    namedWindow(WindowName);
    time_t timer_begin,timer_end;
    raspicam::RaspiCam_Cv Camera;
    cv::Mat image;
    int nCount=10;
    //set camera params
    Camera.set( CV_CAP_PROP_FORMAT, CV_8UC3 );
    Camera.set( CV_CAP_PROP_FRAME_WIDTH, FRAME_WIDTH);
    Camera.set( CV_CAP_PROP_FRAME_HEIGHT, FRAME_HEIGHT);

    //Open camera
    cout<<"Opening Camera..."<<endl;
    if (!Camera.open()) {cerr<<"Error opening the camera"<<endl;return -1;}
    //Start capture
    cout<<"Capturing "<<nCount<<" frames ...."<<endl;
    time ( &timer_begin );


    
    char keyboard;
    int started = 0;
//    for ( int i=0; i<files_number;  i++ ) {
	for ( int i=0; i<files_number; NULL) {
		
		if(kbhit()){
            keyboard = getchar();
 //           printf("%c\n", keyboard);
            if(keyboard== ' ')
            {
				if(started == 1)
				{
					started = 0;
				}
				else
				{
					started = 1;
				}
			
			}
 			
        }
       

        Camera.grab();
        Camera.retrieve ( image);
        imshow(WindowName, image);
        if(started == 1)
        {
			
			cv::imwrite("temporary_file.JPG",image);
			//--- Save JPG files ----
			sprintf(filename, "./positive_data/pos%d.JPG", i);
			ret = rename("temporary_file.JPG", filename);
			if(ret == 0) 
			{
				printf("File renamed successfully");
			}
			else 
			{
				printf("Error: unable to rename the file");
			}
			//---------------------
			//cout<<"Image saved at ./x.JPG"<<endl;
			printf("Image save af file: %d", i);
			printf(".JPG\n" );
		}
		else
		{
			printf("Sampling stopped press and press SPACE to start or stop sampling\n" );	
		}
        waitKey(200);
        cv::imwrite("temporary_file.JPG",image);
        if(started == 1)
		{
			i++;//Count up samples
		}
 
    }
    cout<<"Stop camera..."<<endl;
    Camera.release();
    //show time statistics
    time ( &timer_end ); 
    double secondsElapsed = difftime ( timer_end,timer_begin );
    cout<< secondsElapsed<<" seconds for "<< nCount<<"  frames : FPS = "<<  ( float ) ( ( float ) ( nCount ) /secondsElapsed ) <<endl;
    //save image 
 //   cv::imwrite("raspicam_cv_image.jpg",image);
    cout<<"Image saved at raspicam_cv_image.jpg"<<endl;
 }