337 lines
9.0 KiB
C++
337 lines
9.0 KiB
C++
#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/imgproc/imgproc.hpp"
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#include <iostream>
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using namespace std;
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using namespace cv;
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static void help()
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{
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cout << "\nThis program demonstrates GrabCut segmentation -- select an object in a region\n"
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"and then grabcut will attempt to segment it out.\n"
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"Call:\n"
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"./grabcut <image_name>\n"
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"\nSelect a rectangular area around the object you want to segment\n" <<
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"\nHot keys: \n"
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"\tESC - quit the program\n"
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"\tr - restore the original image\n"
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"\tn - next iteration\n"
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"\n"
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"\tleft mouse button - set rectangle\n"
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"\n"
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"\tCTRL+left mouse button - set GC_BGD pixels\n"
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"\tSHIFT+left mouse button - set GC_FGD pixels\n"
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"\n"
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"\tCTRL+right mouse button - set GC_PR_BGD pixels\n"
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"\tSHIFT+right mouse button - set GC_PR_FGD pixels\n" << endl;
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}
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const Scalar RED = Scalar(0,0,255);
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const Scalar PINK = Scalar(230,130,255);
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const Scalar BLUE = Scalar(255,0,0);
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const Scalar LIGHTBLUE = Scalar(255,255,160);
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const Scalar GREEN = Scalar(0,255,0);
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const int BGD_KEY = CV_EVENT_FLAG_CTRLKEY;
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const int FGD_KEY = CV_EVENT_FLAG_SHIFTKEY;
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static void getBinMask( const Mat& comMask, Mat& binMask )
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{
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if( comMask.empty() || comMask.type()!=CV_8UC1 )
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CV_Error( CV_StsBadArg, "comMask is empty or has incorrect type (not CV_8UC1)" );
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if( binMask.empty() || binMask.rows!=comMask.rows || binMask.cols!=comMask.cols )
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binMask.create( comMask.size(), CV_8UC1 );
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binMask = comMask & 1;
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}
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class GCApplication
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{
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public:
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enum{ NOT_SET = 0, IN_PROCESS = 1, SET = 2 };
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static const int radius = 2;
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static const int thickness = -1;
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void reset();
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void setImageAndWinName( const Mat& _image, const string& _winName );
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void showImage() const;
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void mouseClick( int event, int x, int y, int flags, void* param );
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int nextIter();
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int getIterCount() const { return iterCount; }
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private:
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void setRectInMask();
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void setLblsInMask( int flags, Point p, bool isPr );
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const string* winName;
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const Mat* image;
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Mat mask;
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Mat bgdModel, fgdModel;
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uchar rectState, lblsState, prLblsState;
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bool isInitialized;
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Rect rect;
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vector<Point> fgdPxls, bgdPxls, prFgdPxls, prBgdPxls;
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int iterCount;
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};
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void GCApplication::reset()
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{
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if( !mask.empty() )
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mask.setTo(Scalar::all(GC_BGD));
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bgdPxls.clear(); fgdPxls.clear();
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prBgdPxls.clear(); prFgdPxls.clear();
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isInitialized = false;
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rectState = NOT_SET;
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lblsState = NOT_SET;
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prLblsState = NOT_SET;
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iterCount = 0;
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}
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void GCApplication::setImageAndWinName( const Mat& _image, const string& _winName )
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{
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if( _image.empty() || _winName.empty() )
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return;
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image = &_image;
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winName = &_winName;
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mask.create( image->size(), CV_8UC1);
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reset();
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}
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void GCApplication::showImage() const
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{
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if( image->empty() || winName->empty() )
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return;
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Mat res;
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Mat binMask;
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if( !isInitialized )
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image->copyTo( res );
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else
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{
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getBinMask( mask, binMask );
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image->copyTo( res, binMask );
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}
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vector<Point>::const_iterator it;
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for( it = bgdPxls.begin(); it != bgdPxls.end(); ++it )
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circle( res, *it, radius, BLUE, thickness );
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for( it = fgdPxls.begin(); it != fgdPxls.end(); ++it )
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circle( res, *it, radius, RED, thickness );
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for( it = prBgdPxls.begin(); it != prBgdPxls.end(); ++it )
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circle( res, *it, radius, LIGHTBLUE, thickness );
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for( it = prFgdPxls.begin(); it != prFgdPxls.end(); ++it )
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circle( res, *it, radius, PINK, thickness );
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if( rectState == IN_PROCESS || rectState == SET )
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rectangle( res, Point( rect.x, rect.y ), Point(rect.x + rect.width, rect.y + rect.height ), GREEN, 2);
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imshow( *winName, res );
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}
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void GCApplication::setRectInMask()
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{
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assert( !mask.empty() );
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mask.setTo( GC_BGD );
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rect.x = max(0, rect.x);
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rect.y = max(0, rect.y);
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rect.width = min(rect.width, image->cols-rect.x);
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rect.height = min(rect.height, image->rows-rect.y);
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(mask(rect)).setTo( Scalar(GC_PR_FGD) );
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}
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void GCApplication::setLblsInMask( int flags, Point p, bool isPr )
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{
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vector<Point> *bpxls, *fpxls;
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uchar bvalue, fvalue;
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if( !isPr )
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{
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bpxls = &bgdPxls;
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fpxls = &fgdPxls;
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bvalue = GC_BGD;
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fvalue = GC_FGD;
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}
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else
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{
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bpxls = &prBgdPxls;
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fpxls = &prFgdPxls;
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bvalue = GC_PR_BGD;
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fvalue = GC_PR_FGD;
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}
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if( flags & BGD_KEY )
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{
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bpxls->push_back(p);
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circle( mask, p, radius, bvalue, thickness );
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}
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if( flags & FGD_KEY )
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{
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fpxls->push_back(p);
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circle( mask, p, radius, fvalue, thickness );
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}
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}
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void GCApplication::mouseClick( int event, int x, int y, int flags, void* )
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{
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// TODO add bad args check
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switch( event )
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{
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case CV_EVENT_LBUTTONDOWN: // set rect or GC_BGD(GC_FGD) labels
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{
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bool isb = (flags & BGD_KEY) != 0,
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isf = (flags & FGD_KEY) != 0;
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if( rectState == NOT_SET && !isb && !isf )
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{
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rectState = IN_PROCESS;
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rect = Rect( x, y, 1, 1 );
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}
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if ( (isb || isf) && rectState == SET )
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lblsState = IN_PROCESS;
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}
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break;
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case CV_EVENT_RBUTTONDOWN: // set GC_PR_BGD(GC_PR_FGD) labels
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{
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bool isb = (flags & BGD_KEY) != 0,
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isf = (flags & FGD_KEY) != 0;
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if ( (isb || isf) && rectState == SET )
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prLblsState = IN_PROCESS;
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}
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break;
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case CV_EVENT_LBUTTONUP:
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if( rectState == IN_PROCESS )
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{
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rect = Rect( Point(rect.x, rect.y), Point(x,y) );
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rectState = SET;
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setRectInMask();
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assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() );
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showImage();
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}
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if( lblsState == IN_PROCESS )
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{
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setLblsInMask(flags, Point(x,y), false);
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lblsState = SET;
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showImage();
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}
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break;
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case CV_EVENT_RBUTTONUP:
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if( prLblsState == IN_PROCESS )
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{
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setLblsInMask(flags, Point(x,y), true);
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prLblsState = SET;
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showImage();
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}
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break;
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case CV_EVENT_MOUSEMOVE:
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if( rectState == IN_PROCESS )
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{
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rect = Rect( Point(rect.x, rect.y), Point(x,y) );
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assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() );
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showImage();
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}
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else if( lblsState == IN_PROCESS )
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{
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setLblsInMask(flags, Point(x,y), false);
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showImage();
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}
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else if( prLblsState == IN_PROCESS )
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{
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setLblsInMask(flags, Point(x,y), true);
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showImage();
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}
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break;
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}
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}
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int GCApplication::nextIter()
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{
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if( isInitialized )
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grabCut( *image, mask, rect, bgdModel, fgdModel, 1 );
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else
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{
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if( rectState != SET )
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return iterCount;
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if( lblsState == SET || prLblsState == SET )
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grabCut( *image, mask, rect, bgdModel, fgdModel, 1, GC_INIT_WITH_MASK );
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else
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grabCut( *image, mask, rect, bgdModel, fgdModel, 1, GC_INIT_WITH_RECT );
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isInitialized = true;
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}
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iterCount++;
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bgdPxls.clear(); fgdPxls.clear();
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prBgdPxls.clear(); prFgdPxls.clear();
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return iterCount;
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}
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GCApplication gcapp;
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static void on_mouse( int event, int x, int y, int flags, void* param )
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{
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gcapp.mouseClick( event, x, y, flags, param );
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}
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int main( int argc, char** argv )
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{
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if( argc!=2 )
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{
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help();
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return 1;
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}
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string filename = argv[1];
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if( filename.empty() )
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{
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cout << "\nDurn, couldn't read in " << argv[1] << endl;
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return 1;
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}
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Mat image = imread( filename, 1 );
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if( image.empty() )
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{
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cout << "\n Durn, couldn't read image filename " << filename << endl;
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return 1;
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}
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help();
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const string winName = "image";
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namedWindow( winName, WINDOW_AUTOSIZE );
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setMouseCallback( winName, on_mouse, 0 );
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gcapp.setImageAndWinName( image, winName );
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gcapp.showImage();
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for(;;)
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{
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int c = waitKey(0);
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switch( (char) c )
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{
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case '\x1b':
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cout << "Exiting ..." << endl;
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goto exit_main;
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case 'r':
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cout << endl;
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gcapp.reset();
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gcapp.showImage();
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break;
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case 'n':
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int iterCount = gcapp.getIterCount();
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cout << "<" << iterCount << "... ";
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int newIterCount = gcapp.nextIter();
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if( newIterCount > iterCount )
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{
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gcapp.showImage();
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cout << iterCount << ">" << endl;
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}
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else
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cout << "rect must be determined>" << endl;
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break;
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}
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}
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exit_main:
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destroyWindow( winName );
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return 0;
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}
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