Digikam/Riduzione dei disturbi

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Riduzione dei disturbi utilizzando digiKam

Trascritto dal blog di Mohamed Malik, 12 febbraio 2011

Tutte le fotocamere DSLR in qualche misura soffrono del problema del rumore. Questo è particolarmente vero per quelle di fascia bassa e media anche quando hanno prestazioni ISO molto buone fino a qualcosa come 800.

Utilizzo una Nikon D3000 e la sua prestazione ISO è buona fino a 800. A 1600 ISO è utilizzabile per risoluzioni ridotte, mentre immagini a 3200 ISO sono molto granulose e bisogna applicare la riduzione del rumore.

If you are using digiKam it has a great noise reduction tool. Double click the image where you want to reduce noise and give a right click -> Edit. You can even press F4 on the keyboard and it will do the same thing.

After this you will be presented with the editor view.

From here go to Enhance -> Noise Reduction and you will be presented with this window.

Choose from the settings or you can choose your own settings. Here is a picture of before and after from my tests. They are much more usable and better looking after the noise reduction has been applied.

Before Noise Reduction Was Applied:

After Noise Reduction Was Applied:

Here is another picture in which the noise reduction was applied:

After:

Tip

Matthias Welwarsky added "What I like most about the denoise tool is that I can apply separate amounts of reduction on luma and chroma. This helps a lot in preserving detail while giving a smooth color impression. Luminance noise becomes grain and color blotches are eliminated."