Adobe Photoshop CS4 - Manual (Page 481)

474 USING PHOTOSHOP CS4
Saving and exporting images
Last updated 1/10/2010
Check the signal strength meter
The signal strength meter helps you determine whether a watermark is durable enough to survive the intended use of
the image.
❖ Choose Filter > Digimarc > Read Watermark. The signal strength meter appears at the bottom of the dialog box.
You can also display the meter automatically by selecting Verify while embedding the watermark.
The signal strength meter is available only for images containing digital watermarks that you yourself have embedded.
Digimarc recommends that you check the signal strength meter before publishing your images. For example, if you
often compress watermarked images for inclusion in a website, check the meter before posting the images. You can
also use the signal strength meter to gauge the effectiveness of different Watermark Durability settings that you are
experimenting with.
Placing Photoshop images in other applications
Photoshop provides a number of features to help you use images in other applications. Because of the tight integration
between Adobe products, many Adobe applications can directly import Photoshop (PSD) format files and use
Photoshop features like layers, layer styles, masks, transparency, and effects.
Prepare images for page-layout programs
How you prepare an image for a page-layout program depends upon the file formats the program recognizes:
• Adobe InDesign 2.0 and later can place Photoshop PSD files. You do not need to save or export your Photoshop
image to a different file format. Transparent areas are displayed and printed as expected.
• Most other page-layout programs require you to save the image as a TIFF or EPS file. However, if the image
contains fully transparent areas, you must first define those areas using a clipping path. Check the documentation
for your page-layout program to determine the best format for importing Photoshop images.
If the page-layout program cannot place Photoshop PSD files, follow these steps:
1 If your image contains a transparent background or areas that you want to be transparent, create a clipping path
around the opaque areas of the image. Even if you have deleted the background around the image, you must define
the area with a clipping path before converting the file to TIFF or EPS format. Otherwise, areas that are transparent
may appear as white in the page-layout program.
2 Choose File > Save As.
3 In the Save As dialog box, choose the appropriate format from the Format menu. The format you choose depends
on the final output for the document. For printing to non-PostScript printers, choose TIFF. For printing to
PostScript printers, choose Photoshop EPS. Then click Save.
4 In the TIFF Options or EPS Options dialog box, set the following options. Leave any remaining options at their
default settings, and click
OK.
• TIFF Options dialog box: set Image Compression to None.
• EPS Options dialog box (Windows): set Preview to TIFF (8 bits/pixel) and Encoding to ASCII85.
• EPS Options dialog box (Mac OS): set Preview to Mac (8 bits/pixel) and Encoding to ASCII85.
If the layout program displays transparent areas as white, try printing the document. Some layout programs do not
display clipping paths properly but print them as expected.