Issue

InDesign Links panel fails to report actual, or effective, ppi for Photoshop EPS files.

Solution

Use the InDesign CS4 Preflight panel to create a Preflight profile that checks for resolutions within your needed range. Observe for errors that indicate an image's effective resolution is out of that range.

  1. Choose Window > Output > Preflight.

    Note: If you don't see these menu commands, choose "Show All Menu Items" from the bottom of each menu and submenu.
  2. From the Preflight panel menu in the upper right, choose Define Profiles.
  3. Click the "plus" button at the bottom of the list of existing profiles.
  4. Give your profile a name.
  5. Expand the Images and Objects section.
  6. Select Image Resolution.
  7. Expand the Image Resolution section.
  8. Enable the Color Image Maximum Resolution and give it a value.
  9. Enable the Color Image Minimum Resolution and give it a value.
  10. Repeat Steps 8 and 9 for Grayscale images and 1-bit images.
  11. Click Save.
  12. Click OK to exit the Preflight Profiles dialog box.
  13. Turn on the Preflight feature, and choose your custom profile in the Preflight panel.

Note: The Preflight feature only reports on the effective resolution of an image. For example, for an image with 72 ppi, scaled down to 25% of its original size, Preflight reports its effective resolution of 288 ppi (4 x 72).

Additional Information

For other file formats, InDesign reads the image resolution while importing for the firs time, or when updating an existing link. It then caches the information in the document for quick reference later. The Photoshop EPS import function does not have methods for caching the resolution information.

Currently this issue is a designed limitation for InDesign.

Resolution information may also be missing for PDF files that contain multiple images with different resolutions, or that contain no images.

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