Attachment 6 Digital Image Scanning Specs.pdf

Attachment 6

Digital Image Scanning Specs

The images should all be stored as Single-Page Tagged Image File Format (TIFF) Group IV, 2-Dimension Files, and should be retrievable by standard TIFF viewers, such as the Opticon and Accusoft image viewers.

All image files should be stored with the ".tif' extension.

Images should be scanned at 300 dpi resolution to permit later OCR.

Images should be able to be OCR'd using standard COTS products.

All images should be stored on CD media of a type that can be read by any standard CD reader, that is, the CD media should be compliant with ISO 9660.

All pages for a particular document should be burned to the same CD.

All pages for a collection of documents that comprise a folder or other logical grouping, including a box, should be burned to the same CD. ·

The root directory on the CD should be a 3- to 8-character volume label, such as "X0l".

This volume label must be unique within the collection. Images should be stored in directories at the box level under the root directory.

Each CD should be accompanied by an ASCII comma delimited cross-reference file that contains the following page level fields:

BUR 01-00-0000001,E:,\001\BUR 01-00-0000001.tif,Y,,,1 BUR 01-00-0000002,E:,\001\BUR 01-00-0000002.tif,Y,,, I BUR 01-00-0000003,E:,\001\BUR 01-00-0000003.tif,Y,,,200 BUR 01-00-0000004,E:,\001\BUR 01-00-0000004.tif,,,, BUR 01-00-0000005,E:,\001\BUR 01-00-0000005.tif,,,, OCR Text CD Specification

Any OCR text to be provided should be provided as plain ASCII text in files corresponding to single pages. Page for page, the OCR text should be named using the same file name as the corresponding image, with the exception that the extension for the OCR text file should be 11.txt" instead of 11.tif.11

OCR text should be provided on CD:

Attachment 6

Parallel CD

OCR text files can be placed on a separate CD in a directory structure parallel to the image CD structure. The volumes (the labels of the two CDs) should be exactly the same, e.g., "XO1." This is the preferred structure for multiple CD collections.

"FIL" Indicator System for Image Capture

In an effort to preserve information as to the physical fastenings - staples, binder clips, rubber bands, etc. - of pages within an original source document file being scanned or otherwise imaged, the Department of Justice has adopted a structured marking system based on "F" and "L" designations, which can be used to map the physical attachments as they appear in the original file. In the case of digital image scanning, these "F" and "L" markings are usually captured in an "information channel" outside the page image itself. This provides the flexibility to display and print the page image and the markings without risk of obscuring any of the original information on the page.

Note that this system is not usually used to designate "documents" within a file. The physical fasteners may or may not correspond to the ways in which pages should be grouped together as logical documents. For example, a three page memo may not be stapled at all, or may be stapled together with another two page memo. The "F/L" system is generally used to capture the stapling pattern, and not document boundary designations.

Following are some examples of the way in which these "F" and "L" markers are applied to map the physical fastenings.

Example 1

F L

This is a graphic representation of a simple application of the F and L system. The rectangles represent page images.

The overarching line indicates that these pages were stapled together in the source document file. The first image is marked with an "F" and the last is marked with an "L."

Example 2

F L FL FL F L

This is a slightly more complicated example. In this case, the first three pages were stapled together, and the last four pages were stapled together; these are designated with "F/L" pairs. Pages 4 and 5 are single, unattached pages; these designated "FL."

Example 3

FF

F

L

FL

FL

F

LL

In this case of "nested" stapling, the entire group, 1 though 9, is stapled, and within this larger group, pages 2 and 3 are stapled together, and pages 6 through 9 are stapled together. To accon,odate this, a two level system is used, with the first page of the larger, multi-level group receiving an "FF" and the last page of the larger group receiving an "LL.

Within this larger grouping, the FL system works as it would within a separate collection of pages, with "F" indicating the first page of a stapled unit, "L" indicating the last page, and "FL" indicating single pages.

Example4

FF

FL

FF

L

FL

F

This example is still more complicated, with 3 nested levels of stapling. Note that the overarching group is designated with an "FF"/ "LL" pair. Within this group, page 2 receives an "FL" as a single, otherwise unattached page. Page 3 receives an "FF" as the first page of multi-level group, as opposed to page 7, which receives a single "F" as the first page of single level group.

Example 1

FL LFL FLF

[J[J[J[J[J[J[J[J[J F L

This is a graphic representation of a simple application of the F and L system. The rectangles represent page images.

The overarching line indicates that these pages were stapled together in the source document file. The first image is marked with an "F" and the last is marked with an "L."

Example 2

This is a slightly more complicated example. In this case, the first three pages were stapled together, and the last four pages were stapled together; these are designated with "F/L" pairs. Pages 4 and 5 are single, unattached pages; these designated "FL."

Example3

FF

F

L

FL

FL

F

In this case of "nested" stapling, the entire group, 1 though 9, is stapled, and within this larger group, pages 2 and 3 are stapled together, and pages 6 through 9 are stapled together. To accomodate this, a two level system is used, with the first page of the larger, multi-level group receiving an "FF" and the last page of the larger group receiving an "LL.

Within this larger grouping, the FL system works as it would within a separate collection of pages, with "F" indicating the first page of a stapled unit, "L" indicating the last page, and "FL" indicating single pages.

Example4

FF

FL

FF

L

FL

F

This example is still more complicated, with 3 nested levels of stapling. Note that the overarching group is designated with an "FF"/ "LL" pair. Within this group, page 2 receives an "FL" as a single, otherwise unattached page. Page 3 receives an "FF" as the first page of multi-level group, as opposed to page 7, which receives a single "F" as the first page of single level group.

Suggested reading:

Electronic Imaging Standards and Technical Reports

ANSI/AIIM MS44-1988 (RI993)-Recommended Practice for Quality Control of Image Scanners

ANSI/AIIM MS53-l 993 - Recommended Practice; File Format for Storage and Exchange of Image; Bi-Level Image File Format: Part I

ANSI/AIIM TR26- l 993 - Resolution as it Relates to Photographic and Electronic Imaging

ANSI/AIIM TR38-1996- Compilation of Test Targets for Document Imaging Systems

Suggested reading: