Merge pull request #1449 from fiammante:bright_edges

Bright edges source code and demo (#1449)

* Bright edges source code and demo

* Fix mac errors

* Upload again because of null characters

* Convert to UTF-8

* Change cv::WindowFlags::WINDOW_AUTOSIZE

* Remove parameter

* Remove trailing white spaces (documentation builld error

* Remaining white spaces

* Correct warning

* Correct surround

* Add comment

* Moving prototype out of header

* Add ximgproc namespace, fix example.

* Fix namespace for example

* Remove windows desctruction

* Correct Mat declaration

* Removed unused gray

* Change local functions to static

* Remove tabs and replace by 4 spaces

* Add comments

* Fix comments

* Retry for random test stereo failure

modules/ximgproc/samples/brightedgesexample.cpp

@@ -0,0 +1,106 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2017, IBM Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// @Authors
+//      Marc Fiammante marc.fiammante@fr.ibm.com
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of OpenCV Foundation or contributors may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the OpenCV Foundation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+#include "opencv2/core/utility.hpp"
+#include "opencv2/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
+#include "opencv2/highgui.hpp"
+#include <stdio.h>
+#include <iostream>
+#include "opencv2/ximgproc.hpp"
+using namespace cv;
+using namespace ximgproc;
+using namespace std;
+
+static void help()
+{
+    printf("\nThis sample demonstrates BrightEdge detection\n"
+        "Call:\n"
+        "    /.edge [image_name -- Default is ../data/ml.png]\n\n");
+}
+const char* keys =
+{
+    "{help h||}{@image |../data/ml.png|input image name}"
+};
+int main(int argc, const char** argv)
+{
+    CommandLineParser parser(argc, argv, keys);
+    if (parser.has("help"))
+    {
+        help();
+        return 0;
+    }
+    string filename = parser.get<string>(0);
+    Mat image = imread(filename, IMREAD_COLOR);
+    if (image.empty())
+    {
+        printf("Cannot read image file: %s\n", filename.c_str());
+        help();
+        return -1;
+    }
+    // Create a window
+    // //  " original ";
+    namedWindow("Original");
+    imshow("Original", image);
+    //  " absdiff ";
+    Mat edge;
+    BrightEdges(image, edge, 0); //  No contrast
+    namedWindow("Absolute Difference");
+    imshow("Absolute Difference", edge);
+    // " default contrast 1 ";
+    BrightEdges(image, edge);
+    namedWindow("Default contrast");
+    imshow("Default contrast", edge);// Default contrast 1
+    // " Contrast 5  \n";
+    BrightEdges(image, edge, 5);
+    namedWindow("Contrast 5");
+    imshow("Contrast 5", edge);
+    // " Contrast 10  \n";
+    BrightEdges(image, edge, 10);
+    namedWindow("Contrast 10");
+    imshow("Contrast 10", edge);
+    //  "wait key ";
+    waitKey(0);
+    //  "end  ";
+    return 0;
+}