lux@llumen.be

I have this patch (see bottom message) in which I'd like to read in a processed picture of a beach where the wind has left some patterns with traces of shels. It kind of looks like an abstract of a matrixview sequencer window.

I want to scan the picture row by row and use the contrast as a velocityvalue and noteon/off message.

The thing is that I don't need a constant note on message repeating itselfs, what I want if something dramatically changes in contrast you get a note on message, the duration of the note is as long as the contrast remains more or less (How do I threshold this?? I can't figure out how to ignore small changes and see large ones) the same and get a noteoff when the contrast changes back to the 'base value'

It's a project some pupils of mine came up with and of course they want to have another installation of the patch hooked on to a camera in a street in the city.

Hi,
I have this patch (see bottom message) in which I'd like to read in a processed picture of a beach where the wind has left some patterns with traces of shels. It kind of looks like an abstract of a matrixview sequencer window.

The thing is that I don't need a constant note on message repeating itselfs, what I want if something dramatically changes in contrast you get a note on message, the duration of the note is as long as the contrast remains more or less (How do I threshold this?? I can't figure out how to ignore small changes and see large ones) the same and get a noteoff when the contrast changes back to the 'base value' 

kind-of-treshold-for-filtering-data

On 08 May 2007, at 13:45, pieter coussement wrote:

> I have this patch (see bottom message) in which I'd like to read in 

> a processed picture of a beach where the wind has left some 

> patterns with traces of shels. It kind of looks like an abstract of 

> I want to scan the picture row by row and use the contrast as a 

> The thing is that I don't need a constant note on message repeating 

> itselfs, what I want if something dramatically changes in contrast 

> you get a note on message, the duration of the note is as long as 

> the contrast remains more or less (How do I threshold this?? I 

> can't figure out how to ignore small changes and see large ones) 

> the same and get a noteoff when the contrast changes back to the 

> It's a project some pupils of mine came up with and of course they 

> want to have another installation of the patch hooked on to a 

> #P flonum 572 619 77 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P number 451 667 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P newex 451 642 131 196617 if $i1 > $i2 then $i1 else 0;

> #P newex 897 444 184 196617 jit.slide @slide_up 10 @slide_down 10;

> #P user jit.fpsgui 1079 314 60 196617 0;

> #P message 1131 105 68 196617 fullscreen $1;

> #P newex 897 469 189 196617 jit.gl.texture sample @name fb_texture;

> #P newex 610 331 184 196617 jit.slide @slide_up 10 @slide_down 10;

> #P newex 907 188 92 196617 pak poly_mode 0 0;

> #P newex 746 209 170 196617 jit.gl.handle sample @auto_rotate 1;

> #P newex 610 308 159 196617 jit.op @op pass pass + pass pass;

damn, I meant to say column by column
srry

>
> Hi,
> I have this patch (see bottom message) in which I'd like to read in  
> a processed picture of a beach where the wind has left some  
> patterns with traces of shels. It kind of looks like an abstract of  
> a matrixview sequencer window.
>
> I want to scan the picture row by row and use the contrast as a  
> velocityvalue and noteon/off message.
>
> The thing is that I don't need a constant note on message repeating  
> itselfs, what I want if something dramatically changes in contrast  
> you get a note on message, the duration of the note is as long as  
> the contrast remains more or less (How do I threshold this?? I  
> can't figure out how to ignore small changes and see large ones)  
> the same and get a noteoff when the contrast changes back to the  
> 'base value'
>
> It's a project some pupils of mine came up with and of course they  
> want to have another installation of the patch hooked on to a  
> camera in a street in the city.
>
> Best Regards,
>
> Pieter
>
> max v2;
> #N vpatcher 30 56 1300 789;
> #P window setfont "Sans Serif" 9.;
> #P newex 601 71 39 196617 thresh;
> #P newex 456 77 62 196617 quickthresh;
> #P flonum 572 619 77 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P number 451 667 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P newex 451 642 131 196617 if $i1 > $i2 then $i1 else 0;
> #P newex 162 663 43 196617 noteout;
> #P newex 897 444 184 196617 jit.slide @slide_up 10 @slide_down 10;
> #P user jit.fpsgui 1079 314 60 196617 0;
> #P message 1131 105 68 196617 fullscreen $1;
> #P toggle 1114 105 15 0;
> #P newex 1156 80 35 196617 sel 27;
> #P newex 1114 80 40 196617 key;
> #P newex 897 469 189 196617 jit.gl.texture sample @name fb_texture;
> #P newex 610 331 184 196617 jit.slide @slide_up 10 @slide_down 10;
> #P newex 897 420 55 196617 jit.matrix;
> #P toggle 967 139 15 0;
> #P toggle 989 168 15 0;
> #P toggle 948 167 15 0;
> #P newex 907 188 92 196617 pak poly_mode 0 0;
> #P newex 746 209 170 196617 jit.gl.handle sample @auto_rotate 1;
> #P newex 610 308 159 196617 jit.op @op pass pass + pass pass;
> #P newex 667 208 71 196617 prepend shape;
> #P user ubumenu 667 189 72 196617 0 1 1 0;
> #X add sphere;
> #X add torus;
> #X add cylinder;
> #X add opencylinder;
> #X add cube;
> #X add opencube;
> #X add plane;
> #X add circle;
> #X prefix_set 0 0  0;
> #X pattrmode 1;
> #P number 610 189 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P message 610 208 56 196617 dim $1 $1;
> #P window linecount 6;
> #P newex 610 232 112 196617 jit.gl.gridshape sample  
> @lighting_enable 1 @depth_enable 1 @smooth_shading 1 @matrixoutput  
> 1 @texture fb_texture;
> #P number 500 149 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P flonum 37 116 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P flonum 179 626 77 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P window linecount 1;
> #P newex 165 596 53 196617 jit.3m;
> #P newex 165 574 172 196617 jit.slide @slide_up 5 @slide_down 5;
> #P user jit.pwindow 1078 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 1014 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 950 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 886 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 822 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 758 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 694 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 630 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 566 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 502 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 438 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 374 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 310 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 246 557 65 15 0 1 0 0 1 0;
> #P user jit.pwindow 182 557 65 15 0 1 0 0 1 0;
> #P newex 263 505 472 196617 jit.scissors @rows 15 @columns 1;
> #P newex 215 463 472 196617 jit.scissors @rows 15 @columns 1;
> #P newex 165 421 472 196617 jit.scissors @rows 15 @columns 1;
> #P newex 165 386 161 196617 jit.scissors @rows 3 @columns 1;
> #P flonum 511 264 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P message 511 311 39 196617 val $1;
> #P newex 130 330 184 196617 jit.slide @slide_up 15 @slide_down 15;
> #P message 341 353 46 196617 interp 1;
> #P toggle 446 149 15 0;
> #P newex 446 171 64 196617 metro 1000;
> #P button 446 237 15 0;
> #N counter 300;
> #X flags 0 0;
> #P newobj 446 262 68 196617 counter 300;
> #P number 446 287 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P message 446 310 61 196617 offset $1 0;
> #P user jit.pwindow 128 388 22 202 0 1 0 1 1 0;
> #P newex 129 352 210 196617 jit.submatrix @dim 1 200 @offset 100 100;
> #B color 5;
> #P newex 200 59 41 196617 r draw;
> #P flonum 1103 155 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P message 1103 175 115 196617 erase_color 0. 0. 0. $1;
> #P window linecount 2;
> #N vpatcher 20 74 620 474;
> #P window setfont "Sans Serif" 9.;
> #P newex 50 92 47 196617 s draw2;
> #P newex 68 72 41 196617 s draw;
> #P newex 86 50 43 196617 s erase;
> #P inlet 86 30 15 0;
> #P inlet 68 52 15 0;
> #P inlet 50 72 15 0;
> #P connect 0 0 5 0;
> #P connect 1 0 4 0;
> #P connect 2 0 3 0;
> #P pop;
> #P newobj 1042 108 46 196617 p drawers;
> #P window linecount 1;
> #P newex 1023 222 185 196617 jit.window sample @floating 1 @fsaa 1;
> #P newex 1053 175 46 196617 r erase;
> #P newex 1024 201 212 196617 jit.gl.render sample @erase_color 0.  
> 0. 0. 1.;
> #P newex 1024 63 57 196617 qmetro 33;
> #P newex 1024 85 66 196617 t b b b erase;
> #P toggle 1024 35 15 0;
> #P user jit.pwindow 129 126 302 202 0 1 0 0 1 0;
> #P message 130 61 67 196617 importmovie;
> #P newex 130 97 129 196617 jit.matrix 1 char 300 200;
> #P connect 22 0 13 0;
> #P fasten 15 0 13 0 451 357 134 357;
> #P connect 13 0 14 0;
> #P fasten 21 0 14 0 346 370 134 370;
> #P fasten 1 0 0 0 135 86 135 86;
> #P fasten 12 0 0 0 205 86 135 86;
> #P connect 0 0 2 0;
> #P connect 2 0 22 0;
> #P connect 23 0 22 0;
> #P connect 13 0 25 0;
> #P connect 25 0 26 0;
> #P fasten 26 0 44 0 170 506 170 506;
> #P connect 44 0 45 0;
> #P connect 45 1 46 0;
> #P hidden fasten 26 0 29 0 170 498 188 498;
> #P connect 25 1 27 0;
> #P hidden fasten 26 1 30 0 200 498 252 498;
> #P connect 25 2 28 0;
> #P hidden fasten 26 2 31 0 230 498 316 498;
> #P hidden fasten 26 3 32 0 260 498 380 498;
> #P hidden fasten 26 4 33 0 290 498 444 498;
> #P connect 20 0 19 0;
> #P connect 19 0 18 0;
> #P fasten 18 0 17 0 451 257 451 257;
> #P connect 17 0 16 0;
> #P connect 16 0 15 0;
> #P connect 46 0 70 0;
> #P connect 70 0 71 0;
> #P connect 48 0 19 1;
> #P hidden fasten 26 5 34 0 320 498 508 498;
> #P connect 24 0 23 0;
> #P hidden fasten 26 6 35 0 350 498 572 498;
> #P connect 72 0 70 1;
> #P connect 51 0 50 0;
> #P fasten 53 0 49 0 672 226 615 226;
> #P fasten 55 0 49 0 751 230 615 230;
> #P fasten 56 0 49 0 912 230 615 230;
> #P connect 50 0 49 0;
> #P fasten 49 0 54 0 615 302 615 302;
> #P connect 54 0 61 0;
> #P hidden fasten 26 7 36 0 380 498 636 498;
> #P fasten 52 1 53 0 703 210 672 210;
> #P hidden fasten 26 8 37 0 410 498 700 498;
> #P connect 68 0 54 1;
> #P hidden fasten 26 9 38 0 440 498 764 498;
> #P hidden fasten 26 10 39 0 470 498 828 498;
> #P hidden fasten 26 11 40 0 500 498 892 498;
> #P fasten 13 0 60 0 134 381 902 381;
> #P connect 60 0 68 0;
> #P connect 68 0 62 0;
> #P fasten 59 0 57 0 972 156 953 156;
> #P connect 57 0 56 1;
> #P hidden fasten 26 12 41 0 530 498 956 498;
> #P fasten 59 0 58 0 972 157 994 157;
> #P connect 58 0 56 2;
> #P hidden fasten 26 13 42 0 560 498 1020 498;
> #P connect 66 0 8 0;
> #P connect 3 0 5 0;
> #P connect 5 0 4 0;
> #P connect 61 0 6 0;
> #P fasten 10 0 6 0 1108 195 1029 195;
> #P fasten 7 0 6 0 1058 196 1029 196;
> #P connect 4 0 6 0;
> #P connect 4 1 9 0;
> #P connect 4 2 9 1;
> #P connect 4 3 9 2;
> #P connect 6 0 67 0;
> #P hidden fasten 26 14 43 0 590 498 1084 498;
> #P connect 11 0 10 0;
> #P fasten 64 0 65 0 1161 102 1119 102;
> #P fasten 65 0 66 0 1130 120 1130 105;
> #P fasten 63 0 64 0 1155 97 1155 82;
> #P pop;
>
>


Could you put the image somewhere for download, so we could have a 

Generally, you would measure the (absolute) difference between 

previous and current value, and if this change is big enough you can 

Could you put the image somewhere for download, so we could have a  
better picture of what's going on?

Generally, you would measure the (absolute) difference between  
previous and current value, and if this change is big enough you can  
take the action.

I tried to modify your patch somewhat to make it filter changes in column and then output changes bigger than a threshold. I only accomodate for the difference between the current and the last frame though.

kind of treshold for filtering data