/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkMinimumMaximumImageFilterTest.cxx,v $
  Language:  C++
  Date:      $Date: 2004/08/10 12:40:23 $
  Version:   $Revision: 1.10 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkImage.h"
#include "itkMinimumMaximumImageFilter.h"
#include "itkSize.h"
#include "itkFilterWatcher.h"

typedef itk::Size<3>                                  SizeType;
typedef itk::Image<float, 3>                  ImageType;
typedef itk::MinimumMaximumImageFilter<ImageType>  MinMaxFilterType;

/* Define the image size and physical coordinates */
SizeType size = {{20, 20, 20}};
double origin [3] = { 0.0, 0.0, 0.0};
double spacing[3] = { 1, 1 , 1};

int 
itkMinimumMaximumImageFilterTest(int , char *[] )
{
    int flag = 0;           /* Did this test program work? */

    std::cout << "Testing Minimum and Maximum Image Calulator:\n";

    // Allocate a simple test image
    ImageType::Pointer image = ImageType::New();
    ImageType::RegionType region;
    region.SetSize(size);
    image->SetLargestPossibleRegion(region);
    image->SetRequestedRegion(region);
    image->SetBufferedRegion(region);
    image->Allocate();

    // Set origin and spacing of physical coordinates
    image->SetOrigin(origin);
    image->SetSpacing(spacing);

    float minimum = -52;
    float maximum = -10;


    // Initialize the image contents with the minimum value
    itk::Index<3> index;
    for (int slice = 0; slice < 20; slice++) {
        index[2] = slice;
        for (int row = 0; row <20; row++) {
            index[1] = row;
            for (int col = 0; col < 20; col++) {
                index[0] = col;
                image->SetPixel(index, minimum);
            }
        }
    }

    // Set voxel (10,10,10) to maximum value
    index[0] = 10;
    index[1] = 10;
    index[2] = 10;
    image->SetPixel(index, maximum);


    // Create and initialize the filter
    MinMaxFilterType::Pointer filter = MinMaxFilterType::New();
    FilterWatcher watcher(filter);

    filter->SetInput(image);
    filter->Update();

    // Return minimum of intensity
    float minimumResult = filter->GetMinimum();
    std::cout << "The Minimum intensity value is : " << minimumResult << std::endl;

    if(minimumResult != minimum)
    {
       std::cout << "Minimum Value is wrong : " << minimumResult ;
       std::cout << " != " << minimum << std::endl;
       flag = 1;
    }
  
    // Return maximum of intensity
    float maximumResult = filter->GetMaximum();
    std::cout << "The Maximum intensity value is : " << maximumResult << std::endl;

    if(maximumResult != maximum)
    {
       std::cout << "Maximum Value is wrong : " << maximumResult ;
       std::cout << " != " << maximum << std::endl;
       flag = 2;
    }


    // Return results of test 
    if (flag != 0) {
        std::cout << "*** Some tests failed" << std::endl;
        return flag; }
    else {
        std::cout << "All tests successfully passed" << std::endl;
        return 0; }

}

