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