// *****************************************************************
// Delphi-OpenCV Demo
// Copyright (C) 2013 Project Delphi-OpenCV
// ****************************************************************
// Contributor:
// Laentir Valetov
// email:laex@bk.ru
// ****************************************************************
// You may retrieve the latest version of this file at the GitHub,
// located at git://github.com/Laex/Delphi-OpenCV.git
// ****************************************************************
// The contents of this file are used with permission, subject to
// the Mozilla Public License Version 1.1 (the "License"); you may
// not use this file except in compliance with the License. You may
// obtain a copy of the License at
// http://www.mozilla.org/MPL/MPL-1_1Final.html
//
// Software distributed under the License is distributed on an
// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
// implied. See the License for the specific language governing
// rights and limitations under the License.
// *******************************************************************

program cv_Canny;

{$APPTYPE CONSOLE}
{$R *.res}

uses
  System.SysUtils,
  highgui_c,
  core_c,
  Core.types_c,
  imgproc_c,
  imgproc.types_c,
  uResourcePaths;

const
  filename = cResourceMedia + 'cat2.jpg';

var
  image: pIplImage = nil;
  gray: pIplImage = nil;
  dst: pIplImage = nil;

begin
  try
    // получаем картинку
    image := cvLoadImage(filename);
    WriteLn(Format('[i] image: %s', [filename]));

    // cоздаём одноканальные картинки
    gray := cvCreateImage(cvGetSize(image), IPL_DEPTH_8U, 1);
    dst := cvCreateImage(cvGetSize(image), IPL_DEPTH_8U, 1);

    // окно для отображения картинки
    cvNamedWindow('original', CV_WINDOW_AUTOSIZE);
    cvNamedWindow('gray', CV_WINDOW_AUTOSIZE);
    cvNamedWindow('cvCanny', CV_WINDOW_AUTOSIZE);

    // преобразуем в градации cерого
    cvCvtColor(image, gray, CV_RGB2GRAY);

    // получаем границы
    cvCanny(gray, dst, 10, 100, 3);

    // показываем картинки
    cvShowImage('original', image);
    cvShowImage('gray', gray);
    cvShowImage('cvCanny', dst);

    // ждём нажатия клавиши
    cvWaitKey(0);

    // оcвобождаем реcурcы
    cvReleaseImage(image);
    cvReleaseImage(gray);
    cvReleaseImage(dst);
    // удаляем окна
    cvDestroyAllWindows();
  except
    on E: Exception do
      WriteLn(E.ClassName, ': ', E.Message);
  end;

end.