gistfile1.txt

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


#include <stdio.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 = 320;
const int FRAME_HEIGHT = 240;
const string WindowName = "Image viewer";

 
int main () {
	//JPG File store
	int ret;
	char ch;
	int files_number = 1000;
//	FILE *store_files[files_number];
	FILE *temp_file;
    char filename[20];
	//-------------
	
	int camera_start_up_frames = 300;
 //    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 );

    for ( int i=0; i<camera_start_up_frames; i++ ) {
        Camera.grab();
        Camera.retrieve ( image);
        imshow(WindowName, image);
       printf("Count down to start sample: %d\n", camera_start_up_frames-i);
       waitKey(1);
    }
    
    
    for ( int i=0; i<files_number; i++ ) {
        Camera.grab();
        Camera.retrieve ( image);
        imshow(WindowName, image);
        cv::imwrite("temporary_file.JPG",image);
        
        //--- Save JPG files ----
		sprintf(filename, "./negative_data/%d.JPG", i);
		ret = rename("temporary_file.JPG", filename);
		if(ret == 0) 
		{
			printf("File renamed successfully");
			printf("Image save af file: %d", i);
			printf(".JPG\n" );
		}
		else 
		{
			printf("Error: unable to rename the file \n");
			printf(" You may make a /negative_data/ directory \n");
		}
        //---------------------
        //cout<<"Image saved at ./x.JPG"<<endl;
        waitKey(100);
         cv::imwrite("temporary_file.JPG",image);
    }
    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;
}