Hi All,
I have an external that I made and use a lot (in fact I have several but this one is a priority for me now). I compiled it for os X, but I would be happy to use it also for MSW and even Linux. I will be glad to let others use it too, I talked with Cyril Henry and suggest me to add it to pd-extended so it will be compiled on the farm for all the platforms and included in the distribution. This external does the same thing as Cyril's [local_max] abstraction but use a different method for robustness to noisy signals and avoid inconvenient that can be introduce by pre-filtering. As it was easier to do it as an external than an abstraction, that what I did.
So can someone tell me how if it is possible and what I have to do for this.
loic ---
Hello loic,
since you don't have a lot's of stuff to add to pure data svn, i think you don't need a developer acces. (for now). so, you could just send me the sources of your externals. if hans agree, i'll add it to the mapping stuff.
cyrille
Loic Kessous a écrit :
Hi All,
I have an external that I made and use a lot (in fact I have several but this one is a priority for me now). I compiled it for os X, but I would be happy to use it also for MSW and even Linux. I will be glad to let others use it too, I talked with Cyril Henry and suggest me to add it to pd-extended so it will be compiled on the farm for all the platforms and included in the distribution. This external does the same thing as Cyril's [local_max] abstraction but use a different method for robustness to noisy signals and avoid inconvenient that can be introduce by pre-filtering. As it was easier to do it as an external than an abstraction, that what I did.
So can someone tell me how if it is possible and what I have to do for this.
loic
Pd-dev mailing list Pd-dev@iem.at http://lists.puredata.info/listinfo/pd-dev
Sure, sounds like it fits in the mapping library. One question, could the algorithm be implemented in Pd? So far, the mapping library is all Pd, no C.
.hc
On Jan 14, 2009, at 8:40 AM, cyrille henry wrote:
Hello loic,
since you don't have a lot's of stuff to add to pure data svn, i think you don't need a developer acces. (for now). so, you could just send me the sources of your externals. if hans agree, i'll add it to the mapping stuff.
cyrille
Loic Kessous a écrit :
Hi All, I have an external that I made and use a lot (in fact I have several but this one is a priority for me now). I compiled it for os X, but I would be happy to use it also for MSW and even Linux. I will be glad to let others use it too, I talked with Cyril Henry and suggest me to add it to pd-extended so it will be compiled on the farm for all the platforms and included in the distribution. This external does the same thing as Cyril's [local_max] abstraction but use a different method for robustness to noisy signals and avoid inconvenient that can be introduce by pre- filtering. As it was easier to do it as an external than an abstraction, that what I did. So can someone tell me how if it is possible and what I have to do for this. loic
Pd-dev mailing list Pd-dev@iem.at http://lists.puredata.info/listinfo/pd-dev
----------------------------------------------------------------------------
¡El pueblo unido jamás será vencido!
Hans-Christoph Steiner a écrit :
Sure, sounds like it fits in the mapping library. One question, could the algorithm be implemented in Pd? So far, the mapping library is all Pd, no C.
i think it can be made as an abstraction.
as Loic explain me, the algorythm is quite simple : a maximum is find, but send only when the curent input is less than 90% of this maximum. it's a good way to find a maximum of a noisy input.
i think the best would be to rewrite it in pd, but since i don't have time, it's ok for me to include external in the mapping lib. moreover, i'll also have some external to add there, once i'll find the time to write them...
Cyrille
.hc
On Jan 14, 2009, at 8:40 AM, cyrille henry wrote:
Hello loic,
since you don't have a lot's of stuff to add to pure data svn, i think you don't need a developer acces. (for now). so, you could just send me the sources of your externals. if hans agree, i'll add it to the mapping stuff.
cyrille
Loic Kessous a écrit :
Hi All, I have an external that I made and use a lot (in fact I have several but this one is a priority for me now). I compiled it for os X, but I would be happy to use it also for MSW and even Linux. I will be glad to let others use it too, I talked with Cyril Henry and suggest me to add it to pd-extended so it will be compiled on the farm for all the platforms and included in the distribution. This external does the same thing as Cyril's [local_max] abstraction but use a different method for robustness to noisy signals and avoid inconvenient that can be introduce by pre-filtering. As it was easier to do it as an external than an abstraction, that what I did. So can someone tell me how if it is possible and what I have to do for this. loic
Pd-dev mailing list Pd-dev@iem.at http://lists.puredata.info/listinfo/pd-dev
¡El pueblo unido jamás será vencido!
hello,
This abstraction should work like your external. So you can easilly use it on every platform...
But after more reflexion, i realize that the noise immunity is not very smart, since it is not constant over regarding the offset of the signal. i.e : if f a time variant function and k a constant, local_max(f) + k != local_max(f+k).
i would prefer the use of a constant threshold better than a threshold depending on the amplitude of the signal.
So, i don't think i'll include this abstraction on the mapping directory. unless someone have good arguments...
doing the same kind of analysis but with a constant threshold is just like using 2 mapping object : hysteresis and local_max. it's a pre-filtering technics, but with a "strange" filter. hysteresis is a very good noise reduction filter for noisy data... (i should develop more it's helpfile)
Cyrille
Loic Kessous a écrit :
Hi All,
I have an external that I made and use a lot (in fact I have several but this one is a priority for me now). I compiled it for os X, but I would be happy to use it also for MSW and even Linux. I will be glad to let others use it too, I talked with Cyril Henry and suggest me to add it to pd-extended so it will be compiled on the farm for all the platforms and included in the distribution. This external does the same thing as Cyril's [local_max] abstraction but use a different method for robustness to noisy signals and avoid inconvenient that can be introduce by pre-filtering. As it was easier to do it as an external than an abstraction, that what I did.
So can someone tell me how if it is possible and what I have to do for this.
loic
Pd-dev mailing list Pd-dev@iem.at http://lists.puredata.info/listinfo/pd-dev
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cyrille henry -
Hans-Christoph Steiner -
Loic Kessous