Riduzione rumore – Capture One

Capture One allows the removal of luminance and color noise from images using the Colore and Luminanza noise reduction sliders. Luminance noise exists in every digital image. Noise is caused by the light-sensitive chip regardless of ISO. Normally, this noise is more visible at high ISO values. Higher Noise levels at high ISO values are caused because the signal has been amplified.

Go to the Dettagli tool tab.
The Riduzione rumore tool will display the auto adjustment settings.
Use the Luminanza slider to adjust the level of luminance noise.
Use the Colore slider to adjust the level of chromatic noise.
Adjust the Dettagli slider to smooth the surface of an image.

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Luminanza

This slider removes the pattern-like noise that is often present in shadow areas. The default setting for Luminance is 50. Increase the setting value for images that display displeasing noise levels and check the effect in the Viewer at 100% magnification.

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Colore

This slider removes color noise from images that are typically noticeable as subtle green/magenta patterns. It is very difficult to recommend specific settings as noise varies from camera to camera, but the program defaults provide a good starting point. The Viewer provides a clear view of the effect of filters on image noise.
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Dettagli

Applying heavy chromatic or luminance noise reduction may give an image a soft appearance. If that is the case, adjust the Dettagli slider to smooth the surface of an image. The default setting of 50 produces an even balance between image detail and noise. Adjust the Dettagli slider to a smaller value to achieve a smoother surface. A large value produces fine detail with improved edge definition. However, a higher setting can also produce more grain, especially with images captured at a high ISO.

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Pixel Singolo

Images that are exposed using a long shutter speed may be susceptible to the occasional ‘hot-pixel’, which is a single white pixel that should appear dark. The Pixel Singolo slider can be used (in the Riduzione rumore tool) to eliminate hot-pixels, although it can also affect the rest of the image. The filter will analyze single pixels compared to the surrounding area and correct the errors. Applying adjustments appropriately as the Single Pixel effect is very powerful especially at its maximum.

The Pixel Singolo slider, like many other adjustments tools, should always be used with caution and in moderation. Remember to try and check the final result before processing.

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Remove long exposure artifacts and high ISO noise Pro

Go to the Dettagli tool tab.
Go to the Riduzione rumore tool.
Use the Pixel Singolo slider to reduce the artifacts of a long exposure.
The higher the number is, the harder the tool works.

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