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;

}