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

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.
    Learn more about the Single Pixel slider.

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

Add grain

  1. Go to the Details Tool Tab.
  2. From the Film Grain tool, select Grain type in the Film drop down menu.
  3. Select an area of uniform color or an area without texture if possible, in the Viewer or the Focus window.
  4. Adjust the Impact slider to the desired amount.
  5. The granularity or size of the grain is adjustable. Alter from fine to coarse by dragging the Granularity slider to the right. Note, when Fine Grain is selected the Granularity slider is disabled.
  6. Settings may be saved as User Preset. A number of built-in Presets are also available.

Note: The Grain Tool is also available as a Local Adjustment.

It can be a good idea to add a bit of structure by adding Film Grain in the image, which will create a more natural look.

Avoid moiré Pro

  1. Go to the Details Tool Tab.
  2. Go to the Moiré tool.
  3. Zoom to 100% in the Viewer and keep the Moiré area visible.
  4. Adjust the Amount value first, followed by the Pattern value, bit-by-bit in small increments.
  5. When the Moiré has disappeared do not increase the Amount or Pattern values.

When working with the Moiré tool, check areas that naturally have narrow stripes or a stripe-like pattern; if these have disappeared gradually turn down the Amount and Pattern and re-check the original Moiré issue.

Learn more

Discover more about Luminance, Color, Details, MoiréFine Grain and the Single Pixel Slider.

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

Moiré

In simple terms Moiré can occur when capturing a subject with fine pattern details. An image sensor may reproduce this pattern with a Moiré effect because it lacks resolution. Moiré can be an issue when photographing clothes and can occur in architecture photography.

The simplest way to avoid Moiré is by adjusting the position of a camera by moving it back/forward while photographing and/or changing your aperture setting. 

When working with the Moiré tool, check areas that naturally have narrow stripes or a stripe-like pattern; if these have disappeared gradually turn down the Amount and Pattern and re-check the original Moiré issue.

When working with the Moiré tool, check areas that naturally have narrow stripes or a stripe-like pattern; if these have disappeared gradually turn down the Amount and Pattern and re-check the original Moiré issue

Film grain

The new Grain tool may be used to alter the image aesthetic by adding a realistic interpretation of film grain to digital images. Alternatively, the Grain tool may be used to add texture to digital images that have an excessively smooth or “polished” appearance, possibly after adding too much noise reduction or after adjusting the negative clarity settings. If this is the case, the Grain tool may be used to create a more natural looking image. Increase Impact and Granularity with caution.

Add a bit of structure by adding Fine Grain in the image.

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