Application d'un filtre et produit de convolution.

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Bonjour,



genre de chose.

je voudrais savoir simplement le lien qu'il y a entre le fait  
d'appliquer une filtre et le fait de calculer un produit de convolution.  

convolution.

Re: Application d'un filtre et produit de convolution.
Le Thu, 10 Apr 2014 18:50:36 +0200,

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    Bonsoir,



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    Je suppose comme tu parles de produit de convolution que tu






    Cordialement,

    JKB

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Re: Application d'un filtre et produit de convolution.
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Re: Application d'un filtre et produit de convolution.
Le Thu, 10 Apr 2014 16:55:04 +0000, JKB wrote:


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Pourquoi ?




analogique. Et heureusement sinon on aurait quelques soucis...













A+

Re: Application d'un filtre et produit de convolution.
Le 10 Apr 2014 22:00:54 GMT,

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    C'est parfaitement exact, mais en analogique, c'est beaucoup plus



    magique. Si l'OP pose la question, je pense que la partie









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    JKB

--  


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Re: Application d'un filtre et produit de convolution.
Le Fri, 11 Apr 2014 05:36:24 +0000, JKB wrote:


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de

beaucoup

Si
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signal.

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A+


Re: Application d'un filtre et produit de convolution.
Le 11 Apr 2014 11:45:58 GMT,

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    raccourci).

--  


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Re: Application d'un filtre et produit de convolution.

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Je vois mal comment tu pourrais le comprendre

  


Re: Application d'un filtre et produit de convolution.
Le Thu, 10 Apr 2014 19:25:18 +0200,


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    convolution dans l'espace du temps.

    JKB

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=> http://loubardes.de-charybde-en-scylla.fr

Re: Application d'un filtre et produit de convolution.


 et
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ssent ce
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ce qu'est
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Oui. Toutefois ...

Si il admet le mot "filtre" pour une fonction sur un intervalle fini.
  (on pourra appeler les valeurs de cette fonction "coefficients" de la
   multiplication)




g du  


 du signal par les  
coefficients et on fait la somme ...

Il a une image avec cette "multiplication" ... qui est une convolution.

s
les sommes.

Cordialement,
--  
|Claude Safon, AgriPacTe,                        ( snipped-for-privacy@wanadoo.fr)|
|----------------------------------------------------------------------|

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Re: Application d'un filtre et produit de convolution.
Bonjour,






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On peut dire, avec les mains, que si le dernier coefficient du filtre  






--  


Re: Application d'un filtre et produit de convolution.

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long du

i

urs du signal par les
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.

eurs
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), i.e que les

ire.
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 coefficient traite ce

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ier, en fait.



dans certains contextes ...

 la



s
espaces.

?tait avec





e,



e

ient!

La convolution pour redonner la vue ... c'est "biblique" ... ;-)


Cordialement,
--  
|Claude Safon, AgriPacTe,                        ( snipped-for-privacy@wanadoo.fr)|
|----------------------------------------------------------------------|

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Re: Application d'un filtre et produit de convolution.












Sympa cet exemple d'application.

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Dans la Bible, on ne convole qu'en justes noces :o)
  


Re: Application d'un filtre et produit de convolution.

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on,  
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une convolution.  
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e  
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 de dire plus haut.



aire.



anipuler !

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