User Guide

Chapter 8 Editing
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Curves options
Noise removal options
You can use the options in the Noise removal section to remove noise from your images while
preserving details that you want to retain.
Channel Specifies the color channels to adjust.
Show Histogram Toggles the histogram display.
Histogram Displays a visual representation of the color information levels in the
image, based on the selected channel. Click and drag the line to
manipulate the curve.
Exposure warning Highlights over- and under-exposed areas of the image.
Reset Discards all changes and reverts to the original curve levels.
Despeckle Removes noise.
Square Removes noise using a 3 x 3 pixel square.
X Removes noise using a 3 x 3 pixel X shape. Use this option when you want to
preserve an image's thin and diagonal lines.
Plus Removes noise using a 3 x 3 pixel plus (+) shape. Use this option when you
want to preserve an image's thin, vertical, and horizontal lines.
Hybrid Removes noise using a 3 x 3 pixel square, a 3 x 3 pixel X shape, and a 3 x 3 pixel
plus (+) shape. Use this option when you want to preserve and image's thin,
diagonal, horizontal, and vertical lines. When hybrid is selected you have
additional noise removal options:
• Amount: Drag the slider to the left or right to select the range of pixels
that will be identified as noise. You would typically select a threshold of 10
to 20.
• Radius: Drag the slider to the left or right to apply median noise removal
to smaller or larger areas. For example, you will typically increase the
Radius value to remove larger areas of noise, but this will also remove
detail from the photo.
• Color noise reduction: Drag the slider to the left or right to control how
much the color variation in a photo is reduced. For example, drag the
slider to the right if you want to reduce color variation. However, you
should be careful about reducing color variation (that is caused by noise)
because you could unintentionally reduce real color variations in a photo.