Venice Restaurant

#include "stdafx.h"

#include <stdio.h>

#include <highgui.h>

#include <cv.h>

#include <cxcore.h>

 

void main(){ //Sobel edge detection for a video

 

    CvCapture* capture = cvCreateFileCapture("testIP_vid.avi"); //The video is loaded into a pointer of type CvCapture

    IplImage* frame; IplImage*gscale_res; IplImage* edgeframe; //Declaration of structure variables to store frames

    char *win = "video"; char *winEdge = "edges"; //Declaration of character pointers to store window names

    cvNamedWindow(win,CV_WINDOW_AUTOSIZE); //Window is created for original image

    cvNamedWindow(winEdge,CV_WINDOW_AUTOSIZE); //Window is created for resultant image

 

    while(1)

    {

        frame = cvQueryFrame(capture); //Image under consideration is captured as a shot of the video

       gscale_res = cvCreateImage(cvSize(frame->width,frame->height),IPL_DEPTH_8U,1);//Creation of the image variable to store both the grayscale intermediate and final result

       edgeframe = cvCreateImage(cvSize(frame->width,frame->height),IPL_DEPTH_16S,1); //The 16-bit signed image for the result of the Sobel Edge detection

       cvCvtColor(frame,gscale_res,CV_BGR2GRAY); //Gray-scale intermediate created

       cvSobel(gscale_res,edgeframe,1,0,3);// Sobel edge detection function is applied on the grayscale image and the result is put in the other variable

       cvConvertScaleAbs(edgeframe,gscale_res,1,0); //The 16-bit signed image is converted to an 8-bit unsigned version so it can be displayed

       cvShowImage(win,frame); //Original image is shown

       cvShowImage(winEdge,gscale_res); //Resultant image with edges detected, is shown

       char c = cvWaitKey(33); //This is to account for the frame speed of the loaded video

       cvReleaseImage(&gscale_res);

       cvReleaseImage(&edgeframe);

       if(c==27) //If the character of code 27 or the ESCAPE character is entered, the loop will break

              break;

    }

 

    cvReleaseCapture(&capture); //Video is released from memory

    cvReleaseImage(&frame);  //Images released from memory

    cvDestroyWindow(win); 

        cvDestroyWindow(winEdge); //Windows closed

}