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Old Jan 29, 2006, 5:38 PM   #1
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I added a new action set today to my site. it's a free download.

TLR Digital Noise Reduction is a set of Photoshop actions for
reducing noise in digital images.

There are some well-known ways of handling noise. Most involve
blurring the channels in the image or averaging pixel values.
Photoshop also includes some Noise filters: Despeckle, Dust &
Scratches, etc.

The actions in TLR Digital Noise Reduction use a more sophisticated
method of noise reduction. The start with a mask to preserve image
details. A duplicate of the image is converted to 8-bit grayscale to
speed mask generation. The mask is used to preserve image detail.
Everything else in the image gets an application of digital noise
reduction.

There are ten progressive levels of digital noise reduction
available in the TLR Digital Noise Reduction action set. There is
also a manual action where you control the settings from mask
generation to noise reduction parameters.

The actions in TLR Digital Noise Reduction work non-destructively
with your images. All of their work is done on layers. You have lots
of flexibility, too. The layers have less than 100% opacity. Yuo you
can adjust the effect later - very handy for when you get ready to
output your images.

The actions work with RGB, CMYK, L*a*b, and Grayscale images. They
are compatible with Photoshop CS/CS2 and earlier versions of
Photoshop. In Photoshop CS/CS2, the actions are placed in a Layer
Set/Group to make them easier to manipulate.

Depending on the strength of digital noise reduction selected, there
will be two layers or three. This is different than most noise
reduction action sets, which reduce noise but do nothing to restore
image details. Levels 3-4, 5-6, 7-8, and 9-10 are paired. They use
the same sharpening settings. Levels 3, 5, 7, and 9 include
a "Restore Fine Details" layer and Levels 4, 6, 8, and 10 do not.
Including a "Restore Fine Details" layer will reduce the noise
reduction slightly while preserving more of the original image
sharpness.

The noise reduction layers have a default opacity of 85%. The layers
for preserving image details have their opacity set to 65%. Feel
free to adjust these settings to increase noise reduction or restore
more of the original image.

Reduction of chroma noise is another sophisticated feature of the
TLR Digital Noise Reduction actions. Three progressive strengths of
chroma noise reduction are applied by making a duplicate image that
is converted to L*a*b mode where chroma noise can be more
effectively removed (and with less softening of image details).

http://www.thelightsrightstudio.com/TLRDigitalNoiseReduction.htm

This is the first release of the TLR Digital Noise Reduction action
set. Please feel free to offer suggestions for improved settings and
features.

Have fun!

Mitch
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