Riduttore di disturbi wavelet¶
Descrizione
Wavelet[1] based denoiser. It transforms each frame from the video input into the wavelet domain, using Cohen-Daubechies-Feauveau 9/7[2]. Then it applies some filtering to the obtained coefficients. It does an inverse wavelet transform after. Due to wavelet properties, it should give a nice smoothed result and reduced noise without blurring picture features.
Attenzione
The effect works best with smaller threshold values. It is easy to over-filter this effect.
Nota
Using different planes and/or higher threshold values can be used for artistic manipulation of the image.
Parametri
Parametro |
Valore |
Descrizione |
|---|---|---|
Metodo |
Selezione |
The filtering method the filter will use. See below. |
Tipo di soglia |
Selezione |
The threshold type the filter will use. See below. |
Soglia |
Intero |
The filtering strength. The higher, the more filtered the video will be. Hard thresholding can use a higher threshold than soft thresholding before the video looks overfiltered. |
Passi |
Intero |
Number of times the wavelet will decompose the picture. Picture cannot be decomposed beyond a particular point (typically, 8 for a 640x480 frame - as 2^9 = 512 > 480). |
Percentuale |
Percentuale |
Partial of full denoising (limited coefficients shrinking) |
Piani |
Selezione |
Seleziona i piani da elaborare. Vedi sotto. |
Sono disponibili le seguenti voci di selezione:
Metodo
Leggero |
Tutti i valori inferiori alla soglia saranno azzerati. Tutti i valori sopra indicati saranno ridotti della soglia. |
Forte |
Tutti i valori inferiori alla soglia saranno azzerati |
Garrote |
Scales or nullifies coefficients - intermediary between (more) soft and (less) hard thresholding (default) |
Tipo di soglia
Universale |
Threshold used is same for all decompositions (default) |
Bayes |
Threshold used depends also on each decomposition coefficients |
Piani
Nessuno |
|
Y (Luminanza) |
|
U (Chroma red-diff) |
|
YU |
|
V (Chroma blue-diff) |
|
YV |
|
UV |
|
Tutto |
Predefinito |
Alfa |