Images & Thumbnails

The Images & Thumbnails page enables you to:

  • Edit the display image size and type of images generated when adding full-resolution images to the collection. (For more information, see Display Image Settings.)

  • Create and set image rights options (band, brand, or watermark) that are applied when images are added.

  • Specify the thumbnail images to create or associate with specific file types.

Learn about:

  1. Accessing the Images & Thumbnails page
  2. Editing display image size and type
  3. Managing image rights settings
  4. Specifying thumbnail images

Accessing the Images & Thumbnails page

To access the Images & Thumbnails page:

Editing Display Image Size and Type

If your collection is set to automatically generate display-quality versions of images when full resolution images are imported, the file type and settings that are set on the server in CONTENTdm Administration are displayed by default. You can override these settings for your project by editing and saving the file type settings or by specifying changes when adding items to your project using one of the wizards. (For more information about configuring a collection for display image settings, see Display Image Settings.)

To edit display image settings:

  1. On the Images & Thumbnails page, find the Display Image Size & Type box.

  2. Edit the settings.

Setting Definition Options
File type Specifies the file format to use for display-quality versions. JPEG2000 (default)

JPEG2000: Lossy compression Compresses display images in JPEG2000 format by a specified compression ratio or by a quality selection. By compression ratio:
Compresses by a default 10:1 ratio (default) or by ratio you specify, up to 100:1.

By quality selection:
Medium (default)

Resolution levels (Auto [default], 4-10)

Quality layers (10 [default] – 30)

Tile dimensions (512 x 512, 1024 x 1024 [default], 2048 x 2048)
JPEG: Maximum display image size Enables you to specify the largest dimensions for generated display images. 640 x 480
800 x 600 (default)
1024 x 768
JPEG: Quality Compresses display images in JPEG format by a quality selection. To further refine compression, you can specify a number within the quality range. Low (10-29)
Medium (30-59)
High (60-99)
Maximum (100 - default)

3. Click OK to save changes and close the Project Settings Manager.

Managing Image Rights Settings

You can use the Image Rights options—band, brand and watermark—to display copyright information or indicate ownership of items in your collection (TIFF, JPEG, JPEG2000, PNG and GIF image formats).

Following are definitions used for types of image rights in CONTENTdm:

  • Watermark: centered, grayscale image per tile

  • Brand: Logo or image placed lower-right on items

  • Band: Color band with text across bottom of items

The Project Client Project Settings Manager enables you to create, edit, delete, and set (i.e., apply) image rights options. Only one of the three options can be applied at any one time while adding items. You also can add or change an image right while editing items using the project spreadsheet or the item editing tab.

For more information about working with image rights, see About Image Rights.

Note: For information about applying image rights options to items imported by using the Web-based Add option in CONTENTdm Administration or Connexion digital import, see Image Rights.

Specifying Thumbnail Images

Thumbnails are the small images that you view when you browse or search a collection. Thumbnails also are displayed when working with items in the Project Client.

When images and PDF files are added to Project Client projects, CONTENTdm tries to generate thumbnail representations of the items. For image files, such as JPEGs, the Project Client uses a scaled-down version of the image itself. By default, CONTENTdm also automatically creates thumbnails for other file types; you can change this setting by using the Project Settings Manager.

You can choose to use generic thumbnails for file types—for example, CONTENTdm provides standardized thumbnails to represent file types (including video, audio, PDF file, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, zipped file, URL, and a generic digital file type). For some types of items, such as music, oral histories, or documents, it may be more useful to have thumbnail images that represent all oral histories or all documents within a collection.

You can use the Project Settings Manager to edit the standard thumbnail icons and associated file types or add your own standardized thumbnails.

To access thumbnail settings: