Use the De-noise control
You use the De-noise adjustment control when you need to reduce digital noise in a RAW image. When you reduce noise in an image, you often have to sharpen the image to prevent blurry edges or loss of detail. To sharpen the image, use the Edges slider in the RAW Fine Tuning adjustment.
Note: You can also use the Noise Reduction adjustment when you need to reduce digital noise in an image. For more information, see Sharpen an image.
Reduce noise during RAW decoding
Select a RAW photo.
Note: If the RAW Fine Tuning controls don’t appear in the Adjustments inspector or the Adjustments pane of the Inspector HUD, the selected image is from a previous version of Aperture. You must first reprocess the image using the most current RAW image processing. For more information, see Reprocess photos from earlier versions of Aperture.
Adjust the amount of noise reduction using the De-noise slider and value slider.
A value greater than 0.00 reduces noise in the image.
Adjust how the noise reduction is applied to edges using the Edges slider and value slider.
A value greater than 0.00 intensifies the sharpening effect on hard edges.