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The goal of the Digital Image Archive is to make readily available to an international audience the resources of the Pitts Theology Library. As a result, we produce the following for each scanned image.
1. 1200 DPI, 8-bit grayscale (or in rare cases a 600 DPI, 24-bit color image file if the image has color) image stored as an uncompressed TIFF image. This image is our primary archival image.
2. 1200 DPI, 8-bit grayscale (or 600 DPI, 24-bit color image) manipulated in Adobe Photoshop to improve clarity and stored as an uncompressed TIFF image. We work from this image to build the remaining images.
3. 72 DPI JPEG that is otherwise the same image as the manipulated image (#2). This is our main display image on the website.
4. 72 DPI JPEG thumbnail, the largest dimension of which is 2 inches. The image is proportionately the same as #3. The thumbnail becomes the link to full-sized JPEG images on the Digital Imaging Archive website.
Our scanning workstation is comprised of the following components:
Hardware:
1. Macintosh Dual 1.8GHz PowerPC (OS 10.4.9) with 1 GB DDR SDRAM
2. Epson Expression 1640XL (flatbed) scanner
Software:
1. Adobe Photoshop CS2 (Most image manipulation done here)
2. Adobe PageMaker 6.5 (PDF manipulation and production only)
3. Adobe Acrobat Distiller 6.0 (Creates the PDF)
The server uses Microsoft Internet Information Server 7 on Windows Server 2008. The database is Microsoft SQL Server 2008. ColdFusion supports the database functions and connects to the database via ODBC.
Images are manipulated in Adobe Photoshop to enhance clarity. Color images were only made in cases where some of the ink in the image was non-black (usually red) or when it was deemed appropriate to reproduce the piece in color (which has been rare). The goal with the color images was to increase the clarity of the images, usually by evening out the bright and dark spots to produce a fairly uniform color image. If the scanned color was such that it made the image difficult to view (a sharp, bright yellow for example), the various settings were adjusted to improve this.
Click here to return to the images home page.