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7. The Menus / 7.7 The Filter Menu

### 7.7.42 Digital Camera/Denoise

Images are called noisy, if areas, that are single-colored in reality, contain many different color and intensity values. Usually you get noisy images, if you take a picture by using a digital camera and the light is to weak and/or the exposure time is to short.

The Denoise-dialog has two parts:

- Color Noise
The human eye is not very sensitive to color changes, therefore at first sight these settings don‘t show much effect. But if you set the filter size to high, the edges in your image may become gray.
- Intensity Noise
Reduction of intensity noise is a two-sided sword: on the one side the noise will be reduced, but on the other side the image may become unsharp. In order to avoid this there is Threshold. Threshold defines the minimum value for reducing noise. 0% doesn‘t reduce anything. Usually this value should be - depending on the image - between 4% and 10%.