1 #include "opencv2/imgcodecs.hpp" 2 #include "opencv2/highgui/highgui.hpp" 3 #include "opencv2/imgproc/imgproc.hpp" 4 5 #include <iostream> 6 7 using namespace std; 8 using namespace cv; 9 10 static void help() 11 { 12 cout << "\nThis program demonstrates GrabCut segmentation -- select an object in a region\n" 13 "and then grabcut will attempt to segment it out.\n" 14 "Call:\n" 15 "./grabcut <image_name>\n" 16 "\nSelect a rectangular area around the object you want to segment\n" << 17 "\nHot keys: \n" 18 "\tESC - quit the program\n" 19 "\tr - restore the original image\n" 20 "\tn - next iteration\n" 21 "\n" 22 "\tleft mouse button - set rectangle\n" 23 "\n" 24 "\tCTRL+left mouse button - set GC_BGD pixels\n" 25 "\tSHIFT+left mouse button - set GC_FGD pixels\n" 26 "\n" 27 "\tCTRL+right mouse button - set GC_PR_BGD pixels\n" 28 "\tSHIFT+right mouse button - set GC_PR_FGD pixels\n" << endl; 29 } 30 31 const Scalar RED = Scalar(0,0,255); 32 const Scalar PINK = Scalar(230,130,255); 33 const Scalar BLUE = Scalar(255,0,0); 34 const Scalar LIGHTBLUE = Scalar(255,255,160); 35 const Scalar GREEN = Scalar(0,255,0); 36 37 const int BGD_KEY = EVENT_FLAG_CTRLKEY; 38 const int FGD_KEY = EVENT_FLAG_SHIFTKEY; 39 40 static void getBinMask( const Mat& comMask, Mat& binMask ) 41 { 42 if( comMask.empty() || comMask.type()!=CV_8UC1 ) 43 CV_Error( Error::StsBadArg, "comMask is empty or has incorrect type (not CV_8UC1)" ); 44 if( binMask.empty() || binMask.rows!=comMask.rows || binMask.cols!=comMask.cols ) 45 binMask.create( comMask.size(), CV_8UC1 ); 46 binMask = comMask & 1; 47 } 48 49 class GCApplication 50 { 51 public: 52 enum{ NOT_SET = 0, IN_PROCESS = 1, SET = 2 }; 53 static const int radius = 2; 54 static const int thickness = -1; 55 56 void reset(); 57 void setImageAndWinName( const Mat& _image, const string& _winName ); 58 void showImage() const; 59 void mouseClick( int event, int x, int y, int flags, void* param ); 60 int nextIter(); 61 int getIterCount() const { return iterCount; } 62 private: 63 void setRectInMask(); 64 void setLblsInMask( int flags, Point p, bool isPr ); 65 66 const string* winName; 67 const Mat* image; 68 Mat mask; 69 Mat bgdModel, fgdModel; 70 71 uchar rectState, lblsState, prLblsState; 72 bool isInitialized; 73 74 Rect rect; 75 vector<Point> fgdPxls, bgdPxls, prFgdPxls, prBgdPxls; 76 int iterCount; 77 }; 78 79 void GCApplication::reset() 80 { 81 if( !mask.empty() ) 82 mask.setTo(Scalar::all(GC_BGD)); 83 bgdPxls.clear(); fgdPxls.clear(); 84 prBgdPxls.clear(); prFgdPxls.clear(); 85 86 isInitialized = false; 87 rectState = NOT_SET; 88 lblsState = NOT_SET; 89 prLblsState = NOT_SET; 90 iterCount = 0; 91 } 92 93 void GCApplication::setImageAndWinName( const Mat& _image, const string& _winName ) 94 { 95 if( _image.empty() || _winName.empty() ) 96 return; 97 image = &_image; 98 winName = &_winName; 99 mask.create( image->size(), CV_8UC1); 100 reset(); 101 } 102 103 void GCApplication::showImage() const 104 { 105 if( image->empty() || winName->empty() ) 106 return; 107 108 Mat res; 109 Mat binMask; 110 if( !isInitialized ) 111 image->copyTo( res ); 112 else 113 { 114 getBinMask( mask, binMask ); 115 image->copyTo( res, binMask ); 116 } 117 118 vector<Point>::const_iterator it; 119 for( it = bgdPxls.begin(); it != bgdPxls.end(); ++it ) 120 circle( res, *it, radius, BLUE, thickness ); 121 for( it = fgdPxls.begin(); it != fgdPxls.end(); ++it ) 122 circle( res, *it, radius, RED, thickness ); 123 for( it = prBgdPxls.begin(); it != prBgdPxls.end(); ++it ) 124 circle( res, *it, radius, LIGHTBLUE, thickness ); 125 for( it = prFgdPxls.begin(); it != prFgdPxls.end(); ++it ) 126 circle( res, *it, radius, PINK, thickness ); 127 128 if( rectState == IN_PROCESS || rectState == SET ) 129 rectangle( res, Point( rect.x, rect.y ), Point(rect.x + rect.width, rect.y + rect.height ), GREEN, 2); 130 131 imshow( *winName, res ); 132 } 133 134 void GCApplication::setRectInMask() 135 { 136 CV_Assert( !mask.empty() ); 137 mask.setTo( GC_BGD ); 138 rect.x = max(0, rect.x); 139 rect.y = max(0, rect.y); 140 rect.width = min(rect.width, image->cols-rect.x); 141 rect.height = min(rect.height, image->rows-rect.y); 142 (mask(rect)).setTo( Scalar(GC_PR_FGD) ); 143 } 144 145 void GCApplication::setLblsInMask( int flags, Point p, bool isPr ) 146 { 147 vector<Point> *bpxls, *fpxls; 148 uchar bvalue, fvalue; 149 if( !isPr ) 150 { 151 bpxls = &bgdPxls; 152 fpxls = &fgdPxls; 153 bvalue = GC_BGD; 154 fvalue = GC_FGD; 155 } 156 else 157 { 158 bpxls = &prBgdPxls; 159 fpxls = &prFgdPxls; 160 bvalue = GC_PR_BGD; 161 fvalue = GC_PR_FGD; 162 } 163 if( flags & BGD_KEY ) 164 { 165 bpxls->push_back(p); 166 circle( mask, p, radius, bvalue, thickness ); 167 } 168 if( flags & FGD_KEY ) 169 { 170 fpxls->push_back(p); 171 circle( mask, p, radius, fvalue, thickness ); 172 } 173 } 174 175 void GCApplication::mouseClick( int event, int x, int y, int flags, void* ) 176 { 177 // TODO add bad args check 178 switch( event ) 179 { 180 case EVENT_LBUTTONDOWN: // set rect or GC_BGD(GC_FGD) labels 181 { 182 bool isb = (flags & BGD_KEY) != 0, 183 isf = (flags & FGD_KEY) != 0; 184 if( rectState == NOT_SET && !isb && !isf ) 185 { 186 rectState = IN_PROCESS; 187 rect = Rect( x, y, 1, 1 ); 188 } 189 if ( (isb || isf) && rectState == SET ) 190 lblsState = IN_PROCESS; 191 } 192 break; 193 case EVENT_RBUTTONDOWN: // set GC_PR_BGD(GC_PR_FGD) labels 194 { 195 bool isb = (flags & BGD_KEY) != 0, 196 isf = (flags & FGD_KEY) != 0; 197 if ( (isb || isf) && rectState == SET ) 198 prLblsState = IN_PROCESS; 199 } 200 break; 201 case EVENT_LBUTTONUP: 202 if( rectState == IN_PROCESS ) 203 { 204 rect = Rect( Point(rect.x, rect.y), Point(x,y) ); 205 rectState = SET; 206 setRectInMask(); 207 CV_Assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() ); 208 showImage(); 209 } 210 if( lblsState == IN_PROCESS ) 211 { 212 setLblsInMask(flags, Point(x,y), false); 213 lblsState = SET; 214 showImage(); 215 } 216 break; 217 case EVENT_RBUTTONUP: 218 if( prLblsState == IN_PROCESS ) 219 { 220 setLblsInMask(flags, Point(x,y), true); 221 prLblsState = SET; 222 showImage(); 223 } 224 break; 225 case EVENT_MOUSEMOVE: 226 if( rectState == IN_PROCESS ) 227 { 228 rect = Rect( Point(rect.x, rect.y), Point(x,y) ); 229 CV_Assert( bgdPxls.empty() && fgdPxls.empty() && prBgdPxls.empty() && prFgdPxls.empty() ); 230 showImage(); 231 } 232 else if( lblsState == IN_PROCESS ) 233 { 234 setLblsInMask(flags, Point(x,y), false); 235 showImage(); 236 } 237 else if( prLblsState == IN_PROCESS ) 238 { 239 setLblsInMask(flags, Point(x,y), true); 240 showImage(); 241 } 242 break; 243 } 244 } 245 246 int GCApplication::nextIter() 247 { 248 if( isInitialized ) 249 grabCut( *image, mask, rect, bgdModel, fgdModel, 1 ); 250 else 251 { 252 if( rectState != SET ) 253 return iterCount; 254 255 if( lblsState == SET || prLblsState == SET ) 256 grabCut( *image, mask, rect, bgdModel, fgdModel, 1, GC_INIT_WITH_MASK ); 257 else 258 grabCut( *image, mask, rect, bgdModel, fgdModel, 1, GC_INIT_WITH_RECT ); 259 260 isInitialized = true; 261 } 262 iterCount++; 263 264 bgdPxls.clear(); fgdPxls.clear(); 265 prBgdPxls.clear(); prFgdPxls.clear(); 266 267 return iterCount; 268 } 269 270 GCApplication gcapp; 271 272 static void on_mouse( int event, int x, int y, int flags, void* param ) 273 { 274 gcapp.mouseClick( event, x, y, flags, param ); 275 } 276 277 int main( int argc, char** argv ) 278 { 279 if( argc!=2 ) 280 { 281 help(); 282 return 1; 283 } 284 string filename = argv[1]; 285 if( filename.empty() ) 286 { 287 cout << "\nDurn, couldn't read in " << argv[1] << endl; 288 return 1; 289 } 290 Mat image = imread( filename, 1 ); 291 if( image.empty() ) 292 { 293 cout << "\n Durn, couldn't read image filename " << filename << endl; 294 return 1; 295 } 296 297 help(); 298 299 const string winName = "image"; 300 namedWindow( winName, WINDOW_AUTOSIZE ); 301 setMouseCallback( winName, on_mouse, 0 ); 302 303 gcapp.setImageAndWinName( image, winName ); 304 gcapp.showImage(); 305 306 for(;;) 307 { 308 int c = waitKey(0); 309 switch( (char) c ) 310 { 311 case '\x1b': 312 cout << "Exiting ..." << endl; 313 goto exit_main; 314 case 'r': 315 cout << endl; 316 gcapp.reset(); 317 gcapp.showImage(); 318 break; 319 case 'n': 320 int iterCount = gcapp.getIterCount(); 321 cout << "<" << iterCount << "... "; 322 int newIterCount = gcapp.nextIter(); 323 if( newIterCount > iterCount ) 324 { 325 gcapp.showImage(); 326 cout << iterCount << ">" << endl; 327 } 328 else 329 cout << "rect must be determined>" << endl; 330 break; 331 } 332 } 333 334 exit_main: 335 destroyWindow( winName ); 336 return 0; 337 } 338
