hi
raul diaz wrote:
Hi IOhannes, Hi list!
seems like you forgot the list, i added it now...
I'm making a patch for live video data manipulation with pix_video --> pix_resize --> pix_dump
if you have plenty of cpu left, you could go for Gem's [pix_dump], which dumps the entire image as a list into "pd-space". then you can do whatever you want with it (e.g. use iemmatrix to calculate what you need). another solution with Gem might be to use [pix_resize] with a width of 1 and then [pix_dump] the image "column".I want to use this video data to control audio synthesis parameters, but first I need to management the list from pix_dump outlet. What's the best way to manipulate this data? I discard iemmatrix because I haven't found it compiled for windows (and I have no idea about compiling externals). I have tried to store this list into a table but I had no result. Maybe I could use list objects to management video data.
well yes! once the data is in pd-space (as list) you can use whatever you want to manipulate it. i don't think there is a general "best way" to do it. with recent versions of pd, using [list] is definitely a good choice (doesn't require any externals) how have you tried to dump the data into a table and why did it not work? (in older pd's i would have used zexy's [tabset] instead of manually unrolling the list and writing the data with [tabwrite]; you canalso do this with plain pd)
as for iemmatrix, isn't it part of pd-extended? i will put a binary online today....
fmga.dsr IOhannes
Hi IOhannes, Hi listers!
2007/5/10, IOhannes m zmoelnig zmoelnig@iem.at:
raul diaz wrote:
Hi IOhannes, Hi list!
seems like you forgot the list, i added it now...
Sorry...I forgot to add list address.
I'm making a patch for live video data manipulation with pix_video --> pix_resize --> pix_dump
if you have plenty of cpu left, you could go for Gem's [pix_dump],which
dumps the entire image as a list into "pd-space". then you can do whatever you want with it (e.g. use iemmatrix to calculate what you need). another solution with Gem might be to use [pix_resize] with a widthof 1
and then [pix_dump] the image "column".I want to use this video data to control audio synthesis parameters, but first I need to management the list from pix_dump outlet. What's the best way to manipulate this data? I discard iemmatrix because I haven't found it compiled for windows (and I have no idea about compiling externals). I have tried to store this list into a table but I had no result. Maybe I could use list objects to management video data.
well yes! once the data is in pd-space (as list) you can use whatever you want to manipulate it. i don't think there is a general "best way" to do it. with recent versions of pd, using [list] is definitely a good choice (doesn't require any externals) how have you tried to dump the data into a table and why did it not work? (in older pd's i would have used zexy's [tabset] instead of manually unrolling the list and writing the data with [tabwrite]; you canalso do this with plain pd)
Finally I have made a patch to store video data into tables (R, G and B tables) with list and tabwrite. Sorry, but I got confused with list objetcs (working very late at night isn't so good ;-) Attached is the new patch.
But now I have 2 options: to work with tables (reading tables values with tabread and manipulating this values) or to work without tables, manipulating lists directly to extract each value I need. What's the best option in terms of computational effectivity? (I use a lot of data which require a lot of cpu, so I need to minimize computational cost). I will use this video data for audio synthesis.
as for iemmatrix, isn't it part of pd-extended? i will put a binary
online today....
I would like to take a look at iemmatrix. Please, tell me where I could find the binary for win32.
Saludos!
Hallo, raul diaz hat gesagt: // raul diaz wrote:
But now I have 2 options: to work with tables (reading tables values with tabread and manipulating this values) or to work without tables, manipulating lists directly to extract each value I need. What's the best option in terms of computational effectivity? (I use a lot of data which require a lot of cpu, so I need to minimize computational cost). I will use this video data for audio synthesis.
Using a table normally is faster, especially if you want to access values by index (that is, not sequentially). You can do some optimizations, too: For one, you can get rid of one counter, if you send the RGB-list to:
[list]
|
[list split 3]
|
[unpack 0 0 0]
| | |
... put to tables
Even faster probably is using just one table for all RGB values: Just do a [list prepend 0] after [pix dump] and send the 0-prepended list to a sender with your table-name as target.
You can still access the individual R, G, or B values by adjusting your index into [tabread] accordingly (use: 3*index + X with X = 0, 1 or 2)
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
Using a table normally is faster, especially if you want to access values by
index (that is, not sequentially). You can do some optimizations, too: For one, you can get rid of one counter, if you send the RGB-list to:
[list] | [list split 3] | [unpack 0 0 0] | | | ... put to tables
Even faster probably is using just one table for all RGB values: Just do a [list prepend 0] after [pix dump] and send the 0-prepended list to a sender with your table-name as target.
You can still access the individual R, G, or B values by adjusting your index into [tabread] accordingly (use: 3*index + X with X = 0, 1 or 2)
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
Thank you very much!
Pretty useful!
Saludos!
Slick solution!
~Kyle
On 5/10/07, Frank Barknecht fbar@footils.org wrote:
Even faster probably is using just one table for all RGB values: Just do a [list prepend 0] after [pix dump] and send the 0-prepended list to a sender with your table-name as target.
You can still access the individual R, G, or B values by adjusting your index into [tabread] accordingly (use: 3*index + X with X = 0, 1 or 2)
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-
Frank Barknecht -
IOhannes m zmoelnig -
Kyle Klipowicz -
raul diaz