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();

}