Noise Reduction

Noise reduction / High ISO / Grain

Remove noise, add grain and avoid Moiré.

Capture One allows the removal of luminance and color noise from images using the Color and Luminance 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.

Please note that Capture One automatically adds an amount of noise reduction based on individual image evaluation.

Remove noise from image files

  1. Go to the Details Tool Tab.
  2. The Noise Reduction tool will display the auto adjustment settings.
  3. Use the Luminance slider to adjust the level of luminance noise.
  4. Use the Color slider to adjust the level of chromatic noise.
  5. Adjust the Details slider to smooth the surface of an image.

 Learn more about the Luminance, Color, and Details sliders.

Remove unsightly noise from image files

Luminance

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.

This slider removes the pattern-like noise that is often present in shadow areas

Color

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.

This slider removes color noise from images that are typically noticeable as subtle green/magenta patterns

Details

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

Adjust this setting to a smaller value to achieve a smoother surface. A large value produces more fine detail with improved edge definition

Single pixel slider

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 Single Pixel slider can be used (in the Noise Reduction 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. But apply adjustments appropriately as the Single Pixel effect is very powerful especially at its maximum 100 setting.

The Single Pixel 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.

The Single Pixel slider can be used (in the Noise Reduction tool) to eliminate hot-pixels although it can also affect the rest of the image

Remove long exposure artifacts and high ISO noise Pro

  1. Go to the Details Tool Tab.
  2. Go to the Noise Reduction tool.
  3. Use the Single Pixel slider to reduce the artifacts of a long exposure.
  4. The higher the number, the harder the tool works.

The Single Pixel slider can be used (in the Noise Reduction tool) to eliminate hot-pixels although it can also affect the rest of the image