1 /*M/////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 4 // 5 // By downloading, copying, installing or using the software you agree to this license. 6 // If you do not agree to this license, do not download, install, 7 // copy or use the software. 8 // 9 // 10 // Intel License Agreement 11 // For Open Source Computer Vision Library 12 // 13 // Copyright (C) 2000, Intel Corporation, all rights reserved. 14 // Third party copyrights are property of their respective owners. 15 // 16 // Redistribution and use in source and binary forms, with or without modification, 17 // are permitted provided that the following conditions are met: 18 // 19 // * Redistribution's of source code must retain the above copyright notice, 20 // this list of conditions and the following disclaimer. 21 // 22 // * Redistribution's in binary form must reproduce the above copyright notice, 23 // this list of conditions and the following disclaimer in the documentation 24 // and/or other materials provided with the distribution. 25 // 26 // * The name of Intel Corporation may not be used to endorse or promote products 27 // derived from this software without specific prior written permission. 28 // 29 // This software is provided by the copyright holders and contributors "as is" and 30 // any express or implied warranties, including, but not limited to, the implied 31 // warranties of merchantability and fitness for a particular purpose are disclaimed. 32 // In no event shall the Intel Corporation or contributors be liable for any direct, 33 // indirect, incidental, special, exemplary, or consequential damages 34 // (including, but not limited to, procurement of substitute goods or services; 35 // loss of use, data, or profits; or business interruption) however caused 36 // and on any theory of liability, whether in contract, strict liability, 37 // or tort (including negligence or otherwise) arising in any way out of 38 // the use of this software, even if advised of the possibility of such damage. 39 // 40 //M*/ 41 #include "_cv.h" 42 43 #define _CV_ACOS_TABLE_SIZE 513 44 45 static const float icv_acos_table[_CV_ACOS_TABLE_SIZE] = { 46 3.14159265f, 3.05317551f, 3.01651113f, 2.98834964f, 2.96458497f, 2.94362719f, 47 2.92466119f, 2.90720289f, 2.89093699f, 2.87564455f, 2.86116621f, 2.84738169f, 48 2.83419760f, 2.82153967f, 2.80934770f, 2.79757211f, 2.78617145f, 2.77511069f, 49 2.76435988f, 2.75389319f, 2.74368816f, 2.73372510f, 2.72398665f, 2.71445741f, 50 2.70512362f, 2.69597298f, 2.68699438f, 2.67817778f, 2.66951407f, 2.66099493f, 51 2.65261279f, 2.64436066f, 2.63623214f, 2.62822133f, 2.62032277f, 2.61253138f, 52 2.60484248f, 2.59725167f, 2.58975488f, 2.58234828f, 2.57502832f, 2.56779164f, 53 2.56063509f, 2.55355572f, 2.54655073f, 2.53961750f, 2.53275354f, 2.52595650f, 54 2.51922417f, 2.51255441f, 2.50594525f, 2.49939476f, 2.49290115f, 2.48646269f, 55 2.48007773f, 2.47374472f, 2.46746215f, 2.46122860f, 2.45504269f, 2.44890314f, 56 2.44280867f, 2.43675809f, 2.43075025f, 2.42478404f, 2.41885841f, 2.41297232f, 57 2.40712480f, 2.40131491f, 2.39554173f, 2.38980439f, 2.38410204f, 2.37843388f, 58 2.37279910f, 2.36719697f, 2.36162673f, 2.35608768f, 2.35057914f, 2.34510044f, 59 2.33965094f, 2.33423003f, 2.32883709f, 2.32347155f, 2.31813284f, 2.31282041f, 60 2.30753373f, 2.30227228f, 2.29703556f, 2.29182309f, 2.28663439f, 2.28146900f, 61 2.27632647f, 2.27120637f, 2.26610827f, 2.26103177f, 2.25597646f, 2.25094195f, 62 2.24592786f, 2.24093382f, 2.23595946f, 2.23100444f, 2.22606842f, 2.22115104f, 63 2.21625199f, 2.21137096f, 2.20650761f, 2.20166166f, 2.19683280f, 2.19202074f, 64 2.18722520f, 2.18244590f, 2.17768257f, 2.17293493f, 2.16820274f, 2.16348574f, 65 2.15878367f, 2.15409630f, 2.14942338f, 2.14476468f, 2.14011997f, 2.13548903f, 66 2.13087163f, 2.12626757f, 2.12167662f, 2.11709859f, 2.11253326f, 2.10798044f, 67 2.10343994f, 2.09891156f, 2.09439510f, 2.08989040f, 2.08539725f, 2.08091550f, 68 2.07644495f, 2.07198545f, 2.06753681f, 2.06309887f, 2.05867147f, 2.05425445f, 69 2.04984765f, 2.04545092f, 2.04106409f, 2.03668703f, 2.03231957f, 2.02796159f, 70 2.02361292f, 2.01927344f, 2.01494300f, 2.01062146f, 2.00630870f, 2.00200457f, 71 1.99770895f, 1.99342171f, 1.98914271f, 1.98487185f, 1.98060898f, 1.97635399f, 72 1.97210676f, 1.96786718f, 1.96363511f, 1.95941046f, 1.95519310f, 1.95098292f, 73 1.94677982f, 1.94258368f, 1.93839439f, 1.93421185f, 1.93003595f, 1.92586659f, 74 1.92170367f, 1.91754708f, 1.91339673f, 1.90925250f, 1.90511432f, 1.90098208f, 75 1.89685568f, 1.89273503f, 1.88862003f, 1.88451060f, 1.88040664f, 1.87630806f, 76 1.87221477f, 1.86812668f, 1.86404371f, 1.85996577f, 1.85589277f, 1.85182462f, 77 1.84776125f, 1.84370256f, 1.83964848f, 1.83559892f, 1.83155381f, 1.82751305f, 78 1.82347658f, 1.81944431f, 1.81541617f, 1.81139207f, 1.80737194f, 1.80335570f, 79 1.79934328f, 1.79533460f, 1.79132959f, 1.78732817f, 1.78333027f, 1.77933581f, 80 1.77534473f, 1.77135695f, 1.76737240f, 1.76339101f, 1.75941271f, 1.75543743f, 81 1.75146510f, 1.74749565f, 1.74352900f, 1.73956511f, 1.73560389f, 1.73164527f, 82 1.72768920f, 1.72373560f, 1.71978441f, 1.71583556f, 1.71188899f, 1.70794462f, 83 1.70400241f, 1.70006228f, 1.69612416f, 1.69218799f, 1.68825372f, 1.68432127f, 84 1.68039058f, 1.67646160f, 1.67253424f, 1.66860847f, 1.66468420f, 1.66076139f, 85 1.65683996f, 1.65291986f, 1.64900102f, 1.64508338f, 1.64116689f, 1.63725148f, 86 1.63333709f, 1.62942366f, 1.62551112f, 1.62159943f, 1.61768851f, 1.61377831f, 87 1.60986877f, 1.60595982f, 1.60205142f, 1.59814349f, 1.59423597f, 1.59032882f, 88 1.58642196f, 1.58251535f, 1.57860891f, 1.57470259f, 1.57079633f, 1.56689007f, 89 1.56298375f, 1.55907731f, 1.55517069f, 1.55126383f, 1.54735668f, 1.54344917f, 90 1.53954124f, 1.53563283f, 1.53172389f, 1.52781434f, 1.52390414f, 1.51999323f, 91 1.51608153f, 1.51216900f, 1.50825556f, 1.50434117f, 1.50042576f, 1.49650927f, 92 1.49259163f, 1.48867280f, 1.48475270f, 1.48083127f, 1.47690845f, 1.47298419f, 93 1.46905841f, 1.46513106f, 1.46120207f, 1.45727138f, 1.45333893f, 1.44940466f, 94 1.44546850f, 1.44153038f, 1.43759024f, 1.43364803f, 1.42970367f, 1.42575709f, 95 1.42180825f, 1.41785705f, 1.41390346f, 1.40994738f, 1.40598877f, 1.40202755f, 96 1.39806365f, 1.39409701f, 1.39012756f, 1.38615522f, 1.38217994f, 1.37820164f, 97 1.37422025f, 1.37023570f, 1.36624792f, 1.36225684f, 1.35826239f, 1.35426449f, 98 1.35026307f, 1.34625805f, 1.34224937f, 1.33823695f, 1.33422072f, 1.33020059f, 99 1.32617649f, 1.32214834f, 1.31811607f, 1.31407960f, 1.31003885f, 1.30599373f, 100 1.30194417f, 1.29789009f, 1.29383141f, 1.28976803f, 1.28569989f, 1.28162688f, 101 1.27754894f, 1.27346597f, 1.26937788f, 1.26528459f, 1.26118602f, 1.25708205f, 102 1.25297262f, 1.24885763f, 1.24473698f, 1.24061058f, 1.23647833f, 1.23234015f, 103 1.22819593f, 1.22404557f, 1.21988898f, 1.21572606f, 1.21155670f, 1.20738080f, 104 1.20319826f, 1.19900898f, 1.19481283f, 1.19060973f, 1.18639955f, 1.18218219f, 105 1.17795754f, 1.17372548f, 1.16948589f, 1.16523866f, 1.16098368f, 1.15672081f, 106 1.15244994f, 1.14817095f, 1.14388370f, 1.13958808f, 1.13528396f, 1.13097119f, 107 1.12664966f, 1.12231921f, 1.11797973f, 1.11363107f, 1.10927308f, 1.10490563f, 108 1.10052856f, 1.09614174f, 1.09174500f, 1.08733820f, 1.08292118f, 1.07849378f, 109 1.07405585f, 1.06960721f, 1.06514770f, 1.06067715f, 1.05619540f, 1.05170226f, 110 1.04719755f, 1.04268110f, 1.03815271f, 1.03361221f, 1.02905939f, 1.02449407f, 111 1.01991603f, 1.01532509f, 1.01072102f, 1.00610363f, 1.00147268f, 0.99682798f, 112 0.99216928f, 0.98749636f, 0.98280898f, 0.97810691f, 0.97338991f, 0.96865772f, 113 0.96391009f, 0.95914675f, 0.95436745f, 0.94957191f, 0.94475985f, 0.93993099f, 114 0.93508504f, 0.93022170f, 0.92534066f, 0.92044161f, 0.91552424f, 0.91058821f, 115 0.90563319f, 0.90065884f, 0.89566479f, 0.89065070f, 0.88561619f, 0.88056088f, 116 0.87548438f, 0.87038629f, 0.86526619f, 0.86012366f, 0.85495827f, 0.84976956f, 117 0.84455709f, 0.83932037f, 0.83405893f, 0.82877225f, 0.82345981f, 0.81812110f, 118 0.81275556f, 0.80736262f, 0.80194171f, 0.79649221f, 0.79101352f, 0.78550497f, 119 0.77996593f, 0.77439569f, 0.76879355f, 0.76315878f, 0.75749061f, 0.75178826f, 120 0.74605092f, 0.74027775f, 0.73446785f, 0.72862033f, 0.72273425f, 0.71680861f, 121 0.71084240f, 0.70483456f, 0.69878398f, 0.69268952f, 0.68654996f, 0.68036406f, 122 0.67413051f, 0.66784794f, 0.66151492f, 0.65512997f, 0.64869151f, 0.64219789f, 123 0.63564741f, 0.62903824f, 0.62236849f, 0.61563615f, 0.60883911f, 0.60197515f, 124 0.59504192f, 0.58803694f, 0.58095756f, 0.57380101f, 0.56656433f, 0.55924437f, 125 0.55183778f, 0.54434099f, 0.53675018f, 0.52906127f, 0.52126988f, 0.51337132f, 126 0.50536051f, 0.49723200f, 0.48897987f, 0.48059772f, 0.47207859f, 0.46341487f, 127 0.45459827f, 0.44561967f, 0.43646903f, 0.42713525f, 0.41760600f, 0.40786755f, 128 0.39790449f, 0.38769946f, 0.37723277f, 0.36648196f, 0.35542120f, 0.34402054f, 129 0.33224495f, 0.32005298f, 0.30739505f, 0.29421096f, 0.28042645f, 0.26594810f, 130 0.25065566f, 0.23438976f, 0.21693146f, 0.19796546f, 0.17700769f, 0.15324301f, 131 0.12508152f, 0.08841715f, 0.00000000f 132 }; 133 134 135 /*F/////////////////////////////////////////////////////////////////////////////////////// 136 // Name: icvCalcPGH 137 // Purpose: 138 // Calculates PGH(pairwise geometric histogram) for contour given. 139 // Context: 140 // Parameters: 141 // contour - pointer to input contour object. 142 // pgh - output histogram 143 // ang_dim - number of angle bins (vertical size of histogram) 144 // dist_dim - number of distance bins (horizontal size of histogram) 145 // Returns: 146 // CV_OK or error code 147 // Notes: 148 //F*/ 149 static CvStatus 150 icvCalcPGH( const CvSeq * contour, float *pgh, int angle_dim, int dist_dim ) 151 { 152 char local_buffer[(1 << 14) + 32]; 153 float *local_buffer_ptr = (float *)cvAlignPtr(local_buffer,32); 154 float *buffer = local_buffer_ptr; 155 double angle_scale = (angle_dim - 0.51) / icv_acos_table[0]; 156 double dist_scale = DBL_EPSILON; 157 int buffer_size; 158 int i, count, pass; 159 int *pghi = (int *) pgh; 160 int hist_size = angle_dim * dist_dim; 161 CvSeqReader reader1, reader2; /* external and internal readers */ 162 163 if( !contour || !pgh ) 164 return CV_NULLPTR_ERR; 165 166 if( angle_dim <= 0 || angle_dim > 180 || dist_dim <= 0 ) 167 return CV_BADRANGE_ERR; 168 169 if( !CV_IS_SEQ_POLYGON( contour )) 170 return CV_BADFLAG_ERR; 171 172 memset( pgh, 0, hist_size * sizeof( pgh[0] )); 173 174 count = contour->total; 175 176 /* allocate buffer for distances */ 177 buffer_size = count * sizeof( float ); 178 179 if( buffer_size > (int)sizeof(local_buffer) - 32 ) 180 { 181 buffer = (float *) cvAlloc( buffer_size ); 182 if( !buffer ) 183 return CV_OUTOFMEM_ERR; 184 } 185 186 cvStartReadSeq( contour, &reader1, 0 ); 187 cvStartReadSeq( contour, &reader2, 0 ); 188 189 /* calc & store squared edge lengths, calculate maximal distance between edges */ 190 for( i = 0; i < count; i++ ) 191 { 192 CvPoint pt1, pt2; 193 double dx, dy; 194 195 CV_READ_EDGE( pt1, pt2, reader1 ); 196 197 dx = pt2.x - pt1.x; 198 dy = pt2.y - pt1.y; 199 buffer[i] = (float)(1./sqrt(dx * dx + dy * dy)); 200 } 201 202 /* 203 do 2 passes. 204 First calculates maximal distance. 205 Second calculates histogram itself. 206 */ 207 for( pass = 1; pass <= 2; pass++ ) 208 { 209 double dist_coeff = 0, angle_coeff = 0; 210 211 /* run external loop */ 212 for( i = 0; i < count; i++ ) 213 { 214 CvPoint pt1, pt2; 215 int dx, dy; 216 int dist = 0; 217 218 CV_READ_EDGE( pt1, pt2, reader1 ); 219 220 dx = pt2.x - pt1.x; 221 dy = pt2.y - pt1.y; 222 223 if( (dx | dy) != 0 ) 224 { 225 int j; 226 227 if( pass == 2 ) 228 { 229 dist_coeff = buffer[i] * dist_scale; 230 angle_coeff = buffer[i] * (_CV_ACOS_TABLE_SIZE / 2); 231 } 232 233 /* run internal loop (for current edge) */ 234 for( j = 0; j < count; j++ ) 235 { 236 CvPoint pt3, pt4; 237 238 CV_READ_EDGE( pt3, pt4, reader2 ); 239 240 if( i != j ) /* process edge pair */ 241 { 242 int d1 = (pt3.y - pt1.y) * dx - (pt3.x - pt1.x) * dy; 243 int d2 = (pt4.y - pt1.y) * dx - (pt2.x - pt1.x) * dy; 244 int cross_flag; 245 int *hist_row = 0; 246 247 if( pass == 2 ) 248 { 249 int dp = (pt4.x - pt3.x) * dx + (pt4.y - pt3.y) * dy; 250 251 dp = cvRound( dp * angle_coeff * buffer[j] ) + 252 (_CV_ACOS_TABLE_SIZE / 2); 253 dp = MAX( dp, 0 ); 254 dp = MIN( dp, _CV_ACOS_TABLE_SIZE - 1 ); 255 hist_row = pghi + dist_dim * 256 cvRound( icv_acos_table[dp] * angle_scale ); 257 258 d1 = cvRound( d1 * dist_coeff ); 259 d2 = cvRound( d2 * dist_coeff ); 260 } 261 262 cross_flag = (d1 ^ d2) < 0; 263 264 d1 = CV_IABS( d1 ); 265 d2 = CV_IABS( d2 ); 266 267 if( pass == 2 ) 268 { 269 if( d1 >= dist_dim ) 270 d1 = dist_dim - 1; 271 if( d2 >= dist_dim ) 272 d2 = dist_dim - 1; 273 274 if( !cross_flag ) 275 { 276 if( d1 > d2 ) /* make d1 <= d2 */ 277 { 278 d1 ^= d2; 279 d2 ^= d1; 280 d1 ^= d2; 281 } 282 283 for( ; d1 <= d2; d1++ ) 284 hist_row[d1]++; 285 } 286 else 287 { 288 for( ; d1 >= 0; d1-- ) 289 hist_row[d1]++; 290 for( ; d2 >= 0; d2-- ) 291 hist_row[d2]++; 292 } 293 } 294 else /* 1st pass */ 295 { 296 d1 = CV_IMAX( d1, d2 ); 297 dist = CV_IMAX( dist, d1 ); 298 } 299 } /* end of processing of edge pair */ 300 301 } /* end of internal loop */ 302 303 if( pass == 1 ) 304 { 305 double scale = dist * buffer[i]; 306 307 dist_scale = MAX( dist_scale, scale ); 308 } 309 } 310 } /* end of external loop */ 311 312 if( pass == 1 ) 313 { 314 dist_scale = (dist_dim - 0.51) / dist_scale; 315 } 316 317 } /* end of pass on loops */ 318 319 320 /* convert hist to floats */ 321 for( i = 0; i < hist_size; i++ ) 322 { 323 ((float *) pghi)[i] = (float) pghi[i]; 324 } 325 326 if( buffer != local_buffer_ptr ) 327 cvFree( &buffer ); 328 329 return CV_OK; 330 } 331 332 333 CV_IMPL void 334 cvCalcPGH( const CvSeq * contour, CvHistogram * hist ) 335 { 336 CV_FUNCNAME( "cvCalcPGH" ); 337 338 __BEGIN__; 339 340 int size[CV_MAX_DIM]; 341 int dims; 342 343 if( !CV_IS_HIST(hist)) 344 CV_ERROR( CV_StsBadArg, "The histogram header is invalid " ); 345 346 if( CV_IS_SPARSE_HIST( hist )) 347 CV_ERROR( CV_StsUnsupportedFormat, "Sparse histogram are not supported" ); 348 349 dims = cvGetDims( hist->bins, size ); 350 351 if( dims != 2 ) 352 CV_ERROR( CV_StsBadSize, "The histogram must be two-dimensional" ); 353 354 if( !CV_IS_SEQ_POLYGON( contour ) || CV_SEQ_ELTYPE( contour ) != CV_32SC2 ) 355 CV_ERROR( CV_StsUnsupportedFormat, "The contour is not valid or the point type is not supported" ); 356 357 IPPI_CALL( icvCalcPGH( contour, ((CvMatND*)(hist->bins))->data.fl, size[0], size[1] )); 358 359 __END__; 360 } 361 362 363 /* End of file. */ 364
