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#N canvas 616 283 966 610 10;
#X declare -path ../..;
#X obj 106 90 cnv 15 100 25 empty empty 1 20 12 0 14 -4034 -66577 0
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#X obj 144 94 pix_video;
#X obj 144 54 gemhead;
#X obj 282 44 declare -path ../..;
#X obj 144 284 pix_opencv_contours;
#X obj 144 404 pix_opencv_trackKnn;
#X obj 144 506 pix_texture;
#X obj 39 59 gemwin;
#X msg 39 17 create \, 1;
#X msg 46 38 destroy;
#X obj 144 528 rectangle 4 3;
#N canvas 622 298 709 722 cvblob 0;
#X obj 279 316 gemlist;
#X obj 279 296 t b a;
#X obj 291 50 gemhead 70;
#X obj 129 258 list append;
#X obj 124 170 list split 2;
#X obj 124 114 list append;
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#X msg 420 349 \$2;
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#X msg 459 349 \$3;
#X msg 434 463 \$4;
#X obj 463 328 t a a;
#X obj 279 576 circle 0.5;
#X obj 279 426 color 1 0 0 0.2;
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#X msg 499 499 \$1;
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#X msg 227 166 \$2;
#X obj 366 622 loadbang;
#X msg 366 641 12;
#X msg 521 357 \$6;
#X obj 521 379 > 0;
#X obj 521 400 sel 1 0;
#X msg 520 421 1 0 0 0.2;
#X msg 540 441 0 1 0 0.2;
#X obj 279 596 translateXYZ 0.2 0.2 0;
#X text 348 252 here is an example on how to display blobs with Gem
;
#X obj 279 446 scaleXYZ 10.666 -8 0;
#X text 253 167 <- be careful ! the size of the cvblob matrix could
change;
#X text 335 184 please check second element to gets matrix width (number
of value per blob);
#X obj 124 136 t a a;
#X obj 187 13 inlet cvblob;
#X obj 187 35 route cvblob;
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#X obj 141 310 print oneblob;
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#X restore 255 429 pd cvblob;
#X obj 144 149 pix_gray;
#X msg 160 252 area \$1;
#X obj 144 170 pix_opencv_threshold;
#X obj 255 305 route count;
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#X obj 253 229 loadbang;
#X text 519 110 This example shows how to make a simple tracking algorithm.
;
#X text 534 134 1 First take a video source (here a video source like
a webcam);
#X text 534 164 2 process it to extract features of interessed \, here
I use a very simple (and not so accurate) gray convertion and thresholding
based on luminance. This is the binarisation stage.;
#X msg 253 252 cvblobOutput 1 \, hierarchy_level 0;
#X text 534 224 3 find blob contours. Select only blob greater than
an area threshold. Also we only get the outer contour (not the inner
holes) of the shape thanks to the [hierarchy_level 0( message.;
#X text 534 284 4 the found blobs are send to [pix_opencv_trackKnn]
to sort there id according to the Knn algorithm.;
#X text 532 322 To complete this process we could add a Kalmann filter
to forseen tracking data in case of hiding or somethign else.;
#X text 515 522 Antoine Villeret - 2013;
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