#include <iostream>
static void help(char** argv)
{
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"
<< argv[0] << " <image_name>\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 GC_FGD pixels\n"
"\n"
"\tCTRL+right mouse button - set GC_PR_BGD pixels\n"
"\tSHIFT+right mouse button - set GC_PR_FGD pixels\n" << endl;
}
static void getBinMask(
const Mat& comMask,
Mat& binMask )
{
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 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;
uchar rectState, lblsState, prLblsState;
bool isInitialized;
vector<Point> fgdPxls, 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;
reset();
}
{
if( image->empty() || winName->empty() )
return;
if( !isInitialized )
else
{
getBinMask( mask, binMask );
image->copyTo( res, binMask );
}
vector<Point>::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);
}
void GCApplication::setRectInMask()
{
rect.width =
min(rect.width, image->cols-rect.x);
rect.height =
min(rect.height, image->rows-rect.y);
}
void GCApplication::setLblsInMask(
int flags,
Point p,
bool isPr )
{
vector<Point> *bpxls, *fpxls;
if( !isPr )
{
bpxls = &bgdPxls;
fpxls = &fgdPxls;
}
else
{
bpxls = &prBgdPxls;
fpxls = &prFgdPxls;
}
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* )
{
switch( event )
{
{
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;
{
bool isb = (flags & BGD_KEY) != 0,
isf = (flags & FGD_KEY) != 0;
if ( (isb || isf) && rectState == SET )
prLblsState = IN_PROCESS;
}
break;
if( rectState == IN_PROCESS )
{
rectState = SET;
setRectInMask();
CV_Assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() );
}
if( lblsState == IN_PROCESS )
{
setLblsInMask(flags,
Point(x,y),
false);
lblsState = SET;
}
break;
if( prLblsState == IN_PROCESS )
{
setLblsInMask(flags,
Point(x,y),
true);
prLblsState = SET;
}
break;
if( rectState == IN_PROCESS )
{
CV_Assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() );
}
else if( lblsState == IN_PROCESS )
{
setLblsInMask(flags,
Point(x,y),
false);
}
else if( prLblsState == IN_PROCESS )
{
setLblsInMask(flags,
Point(x,y),
true);
}
break;
}
}
int GCApplication::nextIter()
{
if( isInitialized )
grabCut( *image, mask, rect, bgdModel, fgdModel, 1 );
else
{
if( rectState != SET )
return iterCount;
if( lblsState == SET || prLblsState == SET )
else
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 )
{
help(argv);
string filename = parser.
get<
string>(
"@input");
if( filename.empty() )
{
cout << "\nDurn, empty filename" << endl;
return 1;
}
{
cout << "\n Durn, couldn't read image filename " << filename << endl;
return 1;
}
const string winName = "image";
gcapp.setImageAndWinName( image, winName );
gcapp.showImage();
for(;;)
{
switch( 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:
return 0;
}