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#X obj -175 -84 metro 40;
#X msg -130 -28 close;
#X obj -155 14 pdp_v4l;
#X msg -137 -55 open /dev/video0;
#X obj -30 -111 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1
0 1;
#X obj -30 -84 metro 40;
#X msg 34 -65 close;
#X msg 30 -89 open /dev/video0;
#X obj -10 14 pdp_v4l2;
#X msg 31 -13 format \$1;
#X obj 32 -35 hradio 15 1 0 4 empty empty empty 0 -8 0 10 -262144 -1
-1 0;
#X text -145 -113 Camera input;
#X text 376 -143 input 1;
#X obj 440 -146 cnv 15 250 250 empty empty empty 20 12 0 14 -260097
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#X obj 473 -94 openpanel;
#X msg 454 -123 bang;
#X obj 453 -26 pdp_background;
#X obj 453 51 pdp_imgloader;
#X obj 453 -49 metro 40;
#X msg 472 -70 load \$1 0 0;
#X floatatom 548 -24 5 0 0 0 - - -;
#X text 500 -124 loading a pattern image;
#X text 448 -143 input 2 ( pattern );
#X obj -11 43 pdp_scale 320 240;
#X obj 453 81 pdp_xv;
#X obj -11 74 pdp_xv;
#X text -187 -211 pdp_opencv_dft : discrete fourier transform;
#X text -187 -197 this can be used for pattern matching;
#X obj 453 21 pdp_scale 320 240;
#X obj 453 -2 pdp_convert image/YCrCb/*;
#X obj 216 65 pdp_qt;
#X obj 249 1 metro 40;
#X msg 249 -27 bang;
#X msg 290 -27 stop;
#X obj 216 -96 openpanel;
#X msg 216 -71 open \$1;
#X msg 216 -122 bang;
#X msg 250 28 loop \$1;
#X obj 330 28 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
1;
#X obj 330 -54 loadbang;
#X text 267 -123 playing a video file;
#X obj 559 -51 s max;
#X msg 518 -49 0;
#X obj -189 109 cnv 15 880 150 empty empty empty 20 12 0 14 -258113
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#X obj -58 192 pdp_opencv_dft;
#X obj 215 206 pdp_opencv_dft;
#X msg -30 158 bang;
#X msg 206 175 bang;
#X obj 114 140 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
-1 -1;
#X obj 113 114 loadbang;
#X text 302 185 <-- Calculate Discrete Fourier Transform of the pattern
;
#X text 324 196 pdp_opencv_dft is too greedy to be calculayed for every
;
#X text 322 209 frame so it is just processed when it receives a bang
;
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#X obj 1 381 pdp_xv;
#X obj 108 331 pdp_hue;
#X floatatom 108 358 5 0 0 0 - - -;
#X floatatom 132 271 5 0 0 0 - - -;
#X obj 36 269 loadbang;
#X obj 110 292 pdp_binary ----------------;
#X obj -67 292 pdp_binary --------------;
#X floatatom 109 401 5 0 0 0 - - -;
#X msg 97 269 60;
#X obj -1 343 pdp_mul;
#X text 220 390 when it's close to its maximum;
#X text 310 307 60 is a good value to eliminate noise;
#X text 312 319 while keeping meaningful points;
#X text 286 295 <-- Threshold the fft to eliminate noise;
#X text 458 116 processing discrete fourier transform;
#X text 485 270 analyzing/comparing dft outputs;
#X text -115 343 multiply dfts -->;
#X text 201 377 <- average value of dft(i1) x dft(i2);
#X text 221 403 the input image the closest to the pattern;
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#X obj 70 144 route 1;
#X msg 122 144 bang;
#X obj 42 70 t f b;
#X obj 89 95 f;
#X obj 120 95 r max;
#X obj 43 144 >;
#X obj 56 119 f 0;
#X obj 45 44 inlet;
#X obj 73 180 outlet;
#X obj 163 52 route 1;
#X msg 218 44 \; ctest color 13 13;
#X obj 339 49 del 100;
#X msg 396 45 \; ctest color 0 0;
#X obj 120 53 inlet;
#X connect 0 0 1 0;
#X connect 1 0 3 0;
#X connect 1 0 6 0;
#X connect 2 0 3 1;
#X connect 2 0 5 0;
#X connect 2 1 6 0;
#X connect 3 0 6 1;
#X connect 4 0 6 1;
#X connect 5 0 0 0;
#X connect 6 0 5 1;
#X connect 6 0 8 0;
#X connect 7 0 2 0;
#X connect 9 0 10 0;
#X connect 9 0 11 0;
#X connect 11 0 12 0;
#X connect 13 0 9 0;
#X restore 109 377 pd cmax;
#X text 285 -110 ( try estrella.mov );
#X text 499 -111 ( try estrella.jpg );
#X obj 531 361 cnv 15 100 60 empty ctest empty 20 12 0 14 -262144 -262144
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#X text 377 436 ( fft product average > 5 for the estrella example
);
#X text 454 422 when the ffts are close to the pattern;
#X text 505 449 this test pad should turn red;
#X obj 151 357 > 5;
#X obj 114 164 metro 100;
#X obj 29 222 pdp_spigot;
#X obj 30 241 pdp_xv;
#X obj 94 200 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0
1;
#X text 106 230 <-- also outputs phase diagram;
#X text 110 240 ( necessary for reverse dft );
#X obj 151 401 * 0.9;
#X text -188 -179 commets to ydegoyon@gmail.com.;
#X connect 1 0 2 0;
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#X connect 61 0 65 1;
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