Справочник Пользователя для Adobe photoshop cs2
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ADOBE PHOTOSHOP CS2
User Guide
To sharpen an image using an edge mask
1
Create a mask to apply sharpening selectively. There are many ways to create an edge mask. Use your favorite
method, or try this one:
•
Open the Channels palette and select the channel that displays the grayscale image with the greatest contrast in
the document window. Often, this is the green or the red channel.
the document window. Often, this is the green or the red channel.
Selecting a channel with the greatest contrast
•
Duplicate the selected channel.
•
With the duplicate channel selected, choose Filter > Stylize > Find Edges.
•
Choose Image > Adjustments > Invert to invert the image.
Find Edges filter applied and image inverted
•
With the inverted image still selected, choose Filter > Other > Maximum. Set the radius to a low number and
click OK to thicken the edges and randomize the pixels.
click OK to thicken the edges and randomize the pixels.
•
Choose Filter > Noise > Median. Set the radius to a low number and click OK. This averages the neighboring
pixels.
pixels.
•
Choose Image > Adjustment > Levels and set the black point high to get rid of random pixels. If necessary, you
can also paint with black to retouch the final edge mask.
can also paint with black to retouch the final edge mask.
Setting the black point high in Levels to eliminate random pixels in the edge mask
•
Choose Filter > Blur > Gaussian Blur to feather the edges.