added simple homography transforamtion filter

Pastie.pro

@@ -43,7 +43,8 @@ SOURCES += main.cpp\
     filters/padfilter.cpp \
     rangeslider.cpp \
     filters/rectify.cpp \
-    filters/rotate.cpp
+    filters/rotate.cpp \
+    filters/homography.cpp
 
 HEADERS += mainwindow.h \
     camera.h \
@@ -78,7 +79,8 @@ HEADERS += mainwindow.h \
     rangeslider.h \
     range.h \
     filters/rectify.h \
-    filters/rotate.h
+    filters/rotate.h \
+    filters/homography.h
 
 SOURCES += filters/filter.cpp \
     filters/undistort.cpp \

Pastie.pro.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 3.3.0, 2015-01-29T12:14:43. -->
+<!-- Written by QtCreator 3.3.0, 2015-02-04T09:00:50. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

filters.h

@@ -46,6 +46,7 @@
 #include "filters/pathplanner.h"
 #include "filters/resize.h"
 #include "filters/rotate.h"
+#include "filters/homography.h"
 
 #endif // FILTERS_H
 

filters/homography.cpp

@@ -0,0 +1,62 @@
+/*
+ * This file is part of Pastie
+ *
+ * Pastie is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * Pastie is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Pastie. If not, see <http://www.gnu.org/licenses/>.
+ */
+/**
+ * @copyright  2015 Steffen Vogel
+ * @license	   http://www.gnu.org/licenses/gpl.txt GNU Public License
+ * @author     Steffen Vogel <steffen.vogel@rwth-aachen.de>
+ * @link       http://www.steffenvogel.de
+ */
+
+#include "homography.h"
+
+Homography::Homography(const Mat &ho, int i = INTER_LINEAR) :
+	interpolation(i)
+{
+	QMap<int, QString> interMap;
+	interMap[INTER_NEAREST]		= "Nearest Neighbour";
+	interMap[INTER_LINEAR]		= "Linear";
+	interMap[INTER_AREA]		= "Pixel Area Relation";
+	interMap[INTER_CUBIC]		= "Bi-Cubic (4x4)";
+	interMap[INTER_LANCZOS4]	= "Lanczos4 (8x8)";
+
+	settings["Inverse"] = new BooleanSetting(this, inverse, "Invert the homography before transformation");
+	settings["Interpolation"] = new EnumSetting(this, (int &) interpolation, interMap);
+
+	for (int i=0; i<9; i++) {
+		h[i] = ho.at<double>(i);
+		settings["h[" + QString::number(i) + "]"] = new DoubleSetting(this, h[i], Range<double>(-2, 2));
+	}
+}
+
+Result * Homography::applyInternal(Image *img)
+{
+	Mat &m = img->getMat();
+	Mat ho(3, 3, CV_64F);
+
+	for (int i=0; i<9; i++)
+		ho.at<double>(i) = h[i];
+
+	warpPerspective(m, m, ho, m.size(), interpolation);
+
+	return new Result(toQTransform(ho));
+}
+
+Homography::~Homography()
+{
+
+}
+

filters/homography.h

@@ -0,0 +1,24 @@
+#ifndef HOMOGRAPHY_H
+#define HOMOGRAPHY_H
+
+#include "filter.h"
+
+class Homography : public Filter
+{
+	Q_OBJECT
+
+	public:
+		Homography(const Mat &h, int inter);
+		~Homography();
+
+		QString getName() const { return "Homography"; }
+
+	protected:
+		Result * applyInternal(Image *img);
+
+		double h[9];
+		int interpolation;
+		bool inverse;
+};
+
+#endif // HOMOGRAPHY_H