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FiltrageMSICvSeptemb.. - Aymeric Histace

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3. Filtre de lissage<br />

n<br />

Filtrage par convolution<br />

Les trois types de filtres les plus utilisés sont :<br />

n<br />

n<br />

n<br />

Les filtres moyenneurs<br />

Les filtres gaussiens<br />

Les filtres exponentiels<br />

1<br />

h(<br />

x,<br />

y)<br />

=<br />

2<br />

λ<br />

h<br />

2 2<br />

( x + y )<br />

1 −<br />

2<br />

2σ<br />

( x,<br />

y)<br />

= e<br />

2<br />

2πσ<br />

2<br />

γ<br />

h(<br />

x,<br />

y)<br />

= e<br />

4<br />

−γ<br />

( x + y )<br />

<strong>Aymeric</strong> <strong>Histace</strong><br />

23<br />

3. Filtre de lissage<br />

n<br />

Filtrage par convolution : réponse impulsionnelle<br />

<strong>Aymeric</strong> <strong>Histace</strong><br />

24<br />

12

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