Subversion Repositories OpenCV2-Cookbook

/*------------------------------------------------------------------------------------------*\
   This file contains material supporting chapter 5 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 <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include "morphoFeatures.h"

int main()
{
        // Read input image
        cv::Mat image= cv::imread("../building.jpg",0);
        if (!image.data)
                return 0;

    // Display the image
        cv::namedWindow("Image");
        cv::imshow("Image",image);

        // Create the morphological features instance
        MorphoFeatures morpho;
        morpho.setThreshold(40);

        // Get the edges
        cv::Mat edges;
        edges= morpho.getEdges(image);

    // Display the edge image
        cv::namedWindow("Edge Image");
        cv::imshow("Edge Image",edges);

        // Get the corners
    morpho.setThreshold(-1);
        cv::Mat corners;
        corners= morpho.getCorners(image);
        cv::morphologyEx(corners,corners,cv::MORPH_TOPHAT,cv::Mat());
    cv::threshold(corners, corners, 40, 255, cv::THRESH_BINARY_INV);

    // Display the corner image
        cv::namedWindow("Corner Image");
        cv::imshow("Corner Image",corners);

    // Display the corner on the image
        morpho.drawOnImage(corners,image);
        cv::namedWindow("Corners on Image");
        cv::imshow("Corners on Image",image);

        // Read and display image of square
        image= cv::imread("../square.bmp",0);
        cv::namedWindow("Square Image");
        cv::imshow("Square Image",image);

        // Creating the cross-shaped structuring element
        cv::Mat cross(5,5,CV_8U,cv::Scalar(0));
        for (int i=0; i<5; i++) {
                 
          cross.at<uchar>(2,i)= 1;
          cross.at<uchar>(i,2)= 1;                                                                     
        }
                 
        // Dilate with a cross 
        cv::Mat result;
        cv::dilate(image,result,cross);

        // Display the result
        cv::namedWindow("Dilated square with cross");
        cv::imshow("Dilated square with cross",result);

        // Creating the diamond-shaped structuring element
        cv::Mat diamond(5,5,CV_8U,cv::Scalar(1));
        diamond.at<uchar>(0,0)= 0;
        diamond.at<uchar>(0,1)= 0;
        diamond.at<uchar>(1,0)= 0;
        diamond.at<uchar>(4,4)= 0;
        diamond.at<uchar>(3,4)= 0;
        diamond.at<uchar>(4,3)= 0;
        diamond.at<uchar>(4,0)= 0;
        diamond.at<uchar>(4,1)= 0;
        diamond.at<uchar>(3,0)= 0;
        diamond.at<uchar>(0,4)= 0;
        diamond.at<uchar>(0,3)= 0;
        diamond.at<uchar>(1,4)= 0;

        // Erode with a diamond
        cv::Mat result2;
        cv::erode(result,result2,diamond);

        // Display the result
        cv::namedWindow("Eroded square with diamond");
        cv::imshow("Eroded square with diamond",result2);

        // Combine the images into one
        cv::Mat final(100,300,CV_8U);
        cv::Mat window= final(cv::Rect(0,0,100,100));
        image.copyTo(window);
        window= final(cv::Rect(100,0,100,100));
        result.copyTo(window);
        window= final(cv::Rect(200,0,100,100));
        result2.copyTo(window);

        // Display the combined result
        cv::namedWindow("Combined");
        cv::imshow("Combined",final);

        // Save combined result
        cv::imwrite("squares.bmp",final);

        cv::waitKey();

        return 0;
}