QVision: Qt's Image, Video and Computer Vision Library

00001 /*
00002  *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.
00003  *      <http://perception.inf.um.es>
00004  *      University of Murcia, Spain.
00005  *
00006  *      This file is part of the QVision library.
00007  *
00008  *      QVision is free software: you can redistribute it and/or modify
00009  *      it under the terms of the GNU Lesser General Public License as
00010  *      published by the Free Software Foundation, version 3 of the License.
00011  *
00012  *      QVision is distributed in the hope that it will be useful,
00013  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  *      GNU Lesser General Public License for more details.
00016  *
00017  *      You should have received a copy of the GNU Lesser General Public
00018  *      License along with QVision. If not, see <http://www.gnu.org/licenses/>.
00019  */
00020 
00024 
00025 #include <qvip.h>
00026 #include <qvipp.h>
00027 
00028 #include <QVMatrix>
00029 #include <QVHessianPointDetector>
00030 
00031 QVHessianPointDetector::QVHessianPointDetector(QString name): QVProcessingBlock(name)
00032         {
00033         addProperty< QVImage<uChar,3> >("Input image", inputFlag|outputFlag);
00034         addProperty< QVImage<uChar,1> >("Feature response image", outputFlag);
00035         addProperty< QList < QPointF > >("Feature locations", outputFlag);
00036         addProperty< int >("Max number of corners", inputFlag, 300, "Maximal number of points to detect", 10, 1000);
00037         }
00038 
00039 void QVHessianPointDetector::iterate()
00040         {
00041         // 0. Read input property values.
00042         const QVImage<uChar>    image = getPropertyValue< QVImage<uChar,3> >("Input image");
00043         const int               maxNumberCorners = getPropertyValue< int >("Max number of corners");
00044         const int               rows = image.getRows(), cols = image.getCols();
00045 
00046         timeFlag("Read input properties");
00047 
00048         // 2. Get candidate points from corner response image.
00049         QVImage<sFloat> cornerResponseImage(cols, rows);
00050         FilterHessianCornerResponseImage(image, cornerResponseImage);
00051         setPropertyValue< QVImage<uChar> >("Feature response image", cornerResponseImage);
00052         timeFlag("Feature response image");
00053 
00054         // 3. Store locations and intensities of points.
00055         const QList<QPointF> actualPoints = maximalPoints(cornerResponseImage).values();
00056         timeFlag("Get corners and intensity responses");
00057 
00058         const int size = actualPoints.size();
00059         setPropertyValue< QList<QPointF> >("Feature locations", actualPoints.mid(MAX(0,size-maxNumberCorners),maxNumberCorners) );
00060         timeFlag("Store properties values");
00061         }
00062
src/qvblockprogramming/qvprocessingblocks/qvhessianpointdetector.cpp
