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 <qvipp.h>
00026 #include <qvprojective.h>
00027 
00028 #include <QVMatrix>
00029 #include <QVPlanarRectifierBlock>
00030 
00031 QVPlanarRectifierBlock::QVPlanarRectifierBlock(QString name): QVProcessingBlock(name)
00032         {
00033         addProperty<double>("Zoom", inputFlag, 100, "Size of the rectified template", 10, 250);
00034         addProperty<int>("Canvas size", inputFlag, 1, "Size of the rectified template", 1, 5);
00035         addProperty< QVMatrix >("Homography", inputFlag, QVMatrix::identity(3));
00036 
00037         addProperty< QVImage<uChar,3> >("Input image", inputFlag|outputFlag);
00038         addProperty< QVImage<uChar,3> >("Warped image", outputFlag);
00039         }
00040 
00041 void QVPlanarRectifierBlock::iterate()
00042         {
00043         // 0. Read input property values.
00044         const QVImage<uChar,3> image = getPropertyValue< QVImage<uChar,3> >("Input image");
00045         const int       rows = image.getRows(), cols = image.getCols(),
00046                         canvasSize = getPropertyValue<int>("Canvas size"),
00047                         warpedRows = canvasSize*rows, warpedCols = canvasSize*cols;
00048         const double    zoom = getPropertyValue<double>("Zoom");
00049         const QVMatrix  H = getPropertyValue< QVMatrix>("Homography");
00050 
00051         if (H.getCols() != 3 || H.getRows() != 3)
00052                 return;
00053 
00054         timeFlag("Read input properties");
00055 
00056         // 1. Store and show results.
00057         // 1.1. Obtain planar rectification homography, adecuate for ippWarpPerspective
00058         QVMatrix scaleMatrix = QVMatrix::identity(3);
00059         scaleMatrix(0,0) = 2/cols;
00060         scaleMatrix(1,1) = -2/cols;
00061 
00062         QVMatrix        traslateMatrix = QVMatrix::translationMatrix(-cols/2, -rows/2),
00063                         detraslateMatrix = QVMatrix::translationMatrix(warpedCols/2, warpedRows/2);
00064 
00065         QVMatrix zoomMatrix = QVMatrix::identity(3);
00066         zoomMatrix(0,0) = zoom;
00067         zoomMatrix(1,1) = -zoom;
00068 
00069         const QVMatrix rectifyingHomography = detraslateMatrix * zoomMatrix * H * scaleMatrix * traslateMatrix;
00070 
00071         // 1.2. Draw warped image by homography.
00072         QVImage<uChar,3> warped(warpedCols, warpedRows);
00073         Set(((uChar [3]){0,0,0}), warped);
00074 
00075         // Hacer con las IPP
00076         //myWarpPerspective(image, warped, rectifyingHomography);
00077         //WarpPerspective(image, warped, rectifyingHomography);
00078 
00079         setPropertyValue< QVImage<uChar,3> >("Warped image", warped);
00080         timeFlag("Image wrapping");
00081         }
src/qvblockprogramming/qvprocessingblocks/qvplanarrectifierblock.cpp
