Canon EOS 20Da Instruction Manual page 63

Reducing Noise
You can reduce noise that arises in RAW images shot at night or with a
high ISO speed.
NR is an abbreviation for "noise reduction".
1
Select the [NR/Lens/ALO] tab sheet from the tool
palette in the edit window or edit image window.
2
Click the [NR Preview] button.
The [NR Preview] window appears.
3
Adjust an image.
NR check window
You can set a noise reduction level from within a range of 0 to 20.
The larger the setting, the larger the noise reduction effect.
The noise reduction effect can be checked when an image is
displayed at 100% in the NR check window.
You can change the display position of the NR check window by
dragging the enlargement display position in the navigator
window.
4 Click the [Apply] button.
Noise reduction is applied to the image and the image is
redisplayed.
The noise reduction function does not work
Noise reduction cannot be applied when [Viewing and saving RAW
images] (p.76)
Select [High quality] to reduce noise.
To set the same noise reduction level for several images
After selecting multiple images in the main window, you can set the
same noise reduction level for the images without displaying the [NR
Preview] window, by adjusting the noise reduction level in the [NR/Lens/
Navigator
ALO] tool palette
window
[Chrominance noise reduction] sliders, and then clicking the [Apply]
Enlargement
button.
display
position
You can set the default noise reduction beforehand, using
Drag the
[Default noise reduction settings] in the [Tool palette] tab sheet in
sliders
the [Preferences] (p.79).
• When [Apply camera settings] is selected, you can pre-set a
noise reduction level that suits the camera settings beforehand
as the default.
• When [Set as defaults] is selected, you can pre-set a preferred
default setting for the noise reduction level beforehand. This is
particularly useful for applying noise reduction to all the images
in a folder at once, such as batch noise reduction for images
with high ISO speeds.
However, for images with recipes attached, the noise level
recorded in the recipe will be applied.
If [Luminance noise] has been set, resolution may be reduced
along with reduction of noise.
If [Chrominance noise] has been set, color bleeding may occur
along with reduction of noise.
For a list of [NR Preview] window functions, refer to p.116.
is set to [High speed] in the [Preferences] window.
(p.115) using the [Luminance noise reduction] and
Introduction
Contents at
a Glance
1
Basic
Operation
2
Advanced
Operation
Advanced 3
Image Editing
and Printing
Processing 4
Large Numbers
of Images
Editing
5
JPEG/TIFF
Images
Reference
Index
62