UVP Doc-It Life Science - Manual (Page 46)

Using Image Filters
41
Click onto Sharpen from the Filters plug-in or use the Image > Filters > Sharpen command.
Sharpening a large image may take a few seconds.
Blur
This filter blurs edges in an image, making them less prominent. You can see gross (large-scale) detail
more easily after the edges have been blurred because details that may have been obscuring it are
removed.
Click onto Blur from the Filters plug-in or use the Image > Filters > Blur command. Blurring a
large image may take a few seconds.
Emboss
This filter gives an image a "chiseled in stone" look. Edges take on a three-dimensional (3D) appearance,
making them stand out vividly.
Emboss can be performed from any of eight cardinal directions. Conventionally, these are referred to as
North (up), Northeast, East (right), Southeast, South (down), Southwest, West (left) and Northwest.
The easiest way to think of the "direction" of the embossment is as the location of a strong light source
around the image. For example, if North is selected, the image will appear as if it is illuminated with a
strong light from the top. Therefore, horizontal edges will be strongly lighted on the top edge and
shadowed on the bottom, and vertical edges will tend to disappear. Diagonal edges will be shadowed in
direct proportion to how closely they are horizontal. Alternatively, if East is selected, vertical lines will be
shadowed on the left side and lighted on the right side. Horizontal lines would become harder to
distinguish.
Click onto Emboss from the Filters plug-in or use the Image > Filters > Emboss command.
The Emboss window will appear.
Select the desired Emboss Direction. The Preview window will show a thumbnail sample of
what the image would look like embossed from this direction.
Tip: Use the arrow keys to cycle through all eight directions while watching the
Preview.
Click OK.
Starfield Subtraction
This filter eliminates starfield shaped pixel flaws from an image. When long exposures are necessary to
capture an image, bright pixels in the shape of a star may appear in the image.
To subtract the starfield:
Choose Filters > Starfield Subtraction.
Image History
Each material change to an image is tracked in the software s Image History feature. Material changes
include use of any filters applied and use of the Paste Special feature. Changes to Effects and
Annotations are not tracked in the Image History.