#N canvas 299 95 580 486 10;
#X msg 152 134 gemList;
#X msg 152 224 gemList;
#X text 169 16 part of GEM;
#X text 176 43 [tv_biquad];
#X obj 152 185 tv_movement;
#X text 64 83 set the alpha-channel depending on the difference between
this and the last frame.;
#X text 56 329 [tv_movement] detects movement between two subsequent
frames and stores it into the alpha-channel.;
#X msg 256 121 tresh <threshold>;
#X text 57 368 since image-noise can disturb this processing \, changes
between two corresponding pixels that are smaller than <threshold>
are ignored.;
#X text 60 424 For a movement follower you might get the center-of-movement
with a [pix_blob] that listens to the Alpha-channel afterwards.;
#X connect 0 0 4 0;
#X connect 4 0 1 0;
#X connect 7 0 4 0;
