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#X declare -lib Gem;
#X text 452 8 GEM object;
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0;
#X text 40 325 Inlets:;
#X text 39 410 Outlets:;
#X obj 9 286 cnv 15 430 30 empty empty empty 20 12 0 14 -195568 -66577
0;
#X text 18 284 Arguments:;
#X text 453 39 Example:;
#X text 17 424 Outlet 1: gemlist;
#X text 24 339 Inlet 1: gemlist;
#X text 71 31 Class: pix object (analysis);
#X text 24 354 Inlet 1: threshold <float>: minimum luminance of a pixel
to be considered part of a blob. (default:0.04);
#X text 24 383 Inlet 1: blobSize <float>: minimum relative size of
a blob. (default:0.1);
#X text 50 12 Synopsis: [pix_multiblob];
#X text 64 295 int: max number N of blobs to detect;
#X text 20 484 for motion-tracking you will also need;
#X obj 304 484 pix_movement;
#X obj 9 56 cnv 15 430 223 empty empty empty 20 12 0 14 -233017 -66577
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#X text 31 53 Description: blob detector (for multiple blobs);
#X text 17 68 [pix_multiblob] is able to detect multiple blobs within
an image.;
#X text 18 98 a "blob" is a number of adjacent(!) pixels with a luminance
that is bigger than the value defined by "threshold". you can set the
minimum size of a blob that is needed to be detected.;
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#X msg 132 112 create \, 1;
#X msg 198 112 destroy;
#X msg 156 71 set create;
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#X obj 457 279 pix_texture;
#X obj 457 130 pix_film;
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#X obj 85 237 outlet;
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#X connect 5 0 4 0;
#X restore 470 110 pd open;
#X text 511 56 open a supported;
#X text 512 67 movie-clip;
#X text 529 93 macOS: quicktime;
#X text 522 83 MS Windows: *.AVI;
#X text 529 103 linux: depends...;
#X floatatom 469 169 3 0 100 2 threshold - -;
#X obj 469 186 / 100;
#X obj 457 301 square 4;
#X msg 469 207 threshold \$1;
#X floatatom 559 169 3 0 100 2 blobsize - -;
#X obj 559 186 / 100;
#X msg 559 207 blobSize \$1;
#X floatatom 569 305 5 0 0 1 x - -;
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#X floatatom 572 385 5 0 0 1 maxX - -;
#X floatatom 572 401 5 0 0 1 maxY - -;
#X floatatom 573 417 5 0 0 1 area - -;
#N canvas 279 450 687 354 showblob 0;
#X obj 67 86 inlet blobinformation;
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#X obj 88 187 outlet weightedY;
#X obj 109 207 outlet weightedSize;
#X obj 128 228 outlet minX;
#X obj 149 248 outlet minY;
#X obj 215 228 outlet maxX;
#X obj 232 248 outlet maxY;
#X obj 305 228 outlet size;
#X text 60 45 this extracts information of the 1st detected blob;
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#X obj 68 257 rectangle;
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#X text 250 145 -1..+1;
#X obj 340 148 -;
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#X obj 193 124 - 1;
#X obj 193 147 * 4;
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#X obj 222 146 * 4;
#X obj 340 180 * -4;
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#X restore 346 188 pd rectangle;
#X obj 346 117 color 1 1 1 0.5;
#X obj 346 96 gemhead 70;
#X obj 346 138 alpha;
#X msg 425 164 \$6 \$8 \$7 \$9;
#X msg 67 114 \$3 \$4 \$5 \$6 \$7 \$8 \$9 \$10 \$11;
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#X restore 547 280 pd showblob 1;
#X msg 549 131 auto \$1;
#X obj 604 133 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0
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#X obj 457 241 pix_multiblob 6;
#X floatatom 573 433 5 0 0 1 angle* - -;
#X text 17 439 Outlet 2: (k \, 9) matrix: describing k detected blobs
(with 0<=k<N);
#X text 461 464 * angle converted to degrees but is originally in radians
, f 30;
#X text 18 154 the output is a matrix following the conventions of
the mtx-objects from zexy/iemmatrix. each row describes one detected
blob as follows: centerX(weighted) \, centerY(weighted) \, size(weighted)
\, minX \, minY \, maxX \, maxY \, size \, angle. "weighted" here means
each pixel is weighted by its luminance value during the calculation.
"angle" is the (weighted) orientation of the principal axis of the
blob in the [-pi/2 \, pi/2] range.;
#X obj 548 8 declare -lib Gem;
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#X connect 23 0 22 0;
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#X connect 27 0 39 0;
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