Bar Pattern Details - Kodak i5 50 Series User Manual

Bar pattern details

92
A patch is a pattern of parallel, alternating black bars and spaces that is printed
on a document. In order to prevent other document data from being detected
as a patch, the scanner will only recognize a correctly formed bar pattern as a
patch. The width of bars and spaces between the bars needs to be very tightly
controlled to ensure that the scanner detects the bar pattern.
• The wide bars must be 0.20 (5 mm) wide + 0.01 inches (0.25 mm).
• The narrow bars and spaces should be 0.08 inches (2.03 mm) wide + 0.01
inches (0.25 mm).
• The maximum width of the patch code is dependent on the number of wide
and narrow bars for any given patch pattern.
• The minimum overall length of the patch bars is 2 inches (50 mm).
The following table summarizes the patch code patterns used by Kodak
Scanners:
Patch Code
Graphic Pattern
Type
0 No code detected
1 WWnn
2 WnnW
3 WnWn
4 nWWn
5 nWnW
6 nnWW
7 WWWn
8 WWnW
9 WnWW
10 nWWW
11 nnnW
12 nnWn
13 nWnn
14 Wnnn
15 WWWW
For example, a Patch 1 is WWnn:
Description
Kodak Patch Code #1
Kodak Patch Code #2
Kodak Patch Code #3
Kodak Patch Code #4
Kodak Patch Code #5
Kodak Patch Code #6
Kodak Patch Code #7
Kodak Patch Code #8
Kodak Patch Code #9
Kodak Patch Code #10
Kodak Patch Code #11
Kodak Patch Code #12
Kodak Patch Code #13
Kodak Patch Code #14
Kodak Patch Code #15
Wide bar followed by a space then another Wide
bar followed by a space and then a narrow bar
followed by a space then a narrow bar.
Maximum
Width
0.8 +/- 0.01
0.92 +/- 0.01
0.68 +/- 0.01
1.04 +/- 0.01
A-61868 November 2016