Subversion Repositories OpenCV2-Cookbook

/*------------------------------------------------------------------------------------------*\
   This file contains material supporting chapter 10 of the cookbook:  
   Computer Vision Programming using the OpenCV Library.
   by Robert Laganiere, Packt Publishing, 2011.

   This program is free software; permission is hereby granted to use, copy, modify,
   and distribute this source code, or portions thereof, for any purpose, without fee,
   subject to the restriction that the copyright notice may not be removed
   or altered from any source or altered source distribution.
   The software is released on an as-is basis and without any warranties of any kind.
   In particular, the software is not guaranteed to be fault-tolerant or free from failure.
   The author disclaims all warranties with regard to this software, any use,
   and any consequent failure, is purely the responsibility of the user.
 
   Copyright (C) 2010-2011 Robert Laganiere, www.laganiere.name
\*------------------------------------------------------------------------------------------*/

#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>

#include "videoprocessor.h"

void draw(cv::Mat& img, cv::Mat& out) {

        img.copyTo(out);
        cv::circle(out, cv::Point(100,100),5,cv::Scalar(255,0,0),2);
}

void canny(cv::Mat& img, cv::Mat& out) {

        // Convert to gray
        cv::cvtColor(img,out,CV_BGR2GRAY);
        // Compute Canny edges
        cv::Canny(out,out,100,200);
        // Invert the image
        cv::threshold(out,out,128,255,cv::THRESH_BINARY_INV);
}

int main()
{
        // Open the video file
    cv::VideoCapture capture("../bike.avi");
        // check if video successfully opened
        if (!capture.isOpened())
                return 1;

        // Get the frame rate
        double rate= capture.get(CV_CAP_PROP_FPS);

        bool stop(false);
        cv::Mat frame; // current video frame
        cv::namedWindow("Extracted Frame");

        // Delay between each frame
        // corresponds to video frame rate
        int delay= 1000/rate;

        // for all frames in video
        while (!stop) {

                // read next frame if any
                if (!capture.read(frame))
                        break;

                cv::imshow("Extracted Frame",frame);

                // introduce a delay
                // or press key to stop
                if (cv::waitKey(delay)>=0)
                                stop= true;
        }

        // Close the video file
        capture.release();

        cv::waitKey();
               
        // Now using the VideoProcessor class

        // Create instance
        VideoProcessor processor;
        // Open video file
        processor.setInput("../bike.avi");
        // Declare a window to display the video
        processor.displayInput("Input Video");
        processor.displayOutput("Output Video");
        // Play the video at the original frame rate
        processor.setDelay(1000./processor.getFrameRate());
        // Set the frame processor callback function
        processor.setFrameProcessor(canny);
        // Start the process
        processor.run();
        cv::waitKey();
       
        // Second test
        // Create instance
    //  VideoProcessor processor;
        // Open video file
        processor.setInput("../bike.avi");

        // Get basic info about video file
        cv::Size size= processor.getFrameSize();
        std::cout << size.width << " " << size.height << std::endl;
        std::cout << processor.getFrameRate() << std::endl;
        std::cout << processor.getTotalFrameCount() << std::endl;
        std::cout << processor.getFrameNumber() << std::endl;
        std::cout << processor.getPositionMS() << std::endl;

        // No processing
        processor.dontCallProcess();
        // Output filename
//      processor.setOutput("../output/bikeOut",".jpg");
        char codec[4];
        processor.setOutput("../output/bike.avi",processor.getCodec(codec),processor.getFrameRate());
        std::cout << "Codec: " << codec[0] << codec[1] << codec[2] << codec[3] << std::endl;

        // Position the stream at frame 300
    //  processor.setFrameNumber(300);
    //  processor.stopAtFrameNo(120);

        // Declare a window to display the video
        processor.displayInput("Current Frame");
        processor.displayOutput("Output Frame");

        // Play the video at the original frame rate
        processor.setDelay(1000./processor.getFrameRate());

        // Start the process
        processor.run();

        std::cout << processor.getFrameNumber() << std::endl;
        std::cout << processor.getPositionMS() << std::endl;

        cv::waitKey();
}