User Guide

Enhanced Bar Code Engine
VRS User’s Manual
89
Search Direction Group
The application searches for bar codes in a linear fashion, examining the search area
for potential bar codes. For horizontal bar codes with an orientation of 0, for example,
it works down the image starting on the left and searching toward the right edge; for
vertical bar codes, it works across the image starting on the top edge and searches top
to bottom. Bar codes can be oriented on an image in four general directions. You can
select the 0, 90, 180, or 270 check box for the direction you would like to search.
Quality Group
The bar code Quality refers to the condition of bar code elements on an image. For
example, sometimes the bar code elements are well defined; the black bars are clearly
delineated, and very little noise exists on the image. In some cases, the black bars are
too light, or noise exists in the bar code’s quiet zone. Because these factors can affect
the application’s ability to accurately read the bar code, you can specify the quality of
the bar codes being read.
• Good—Well delineated, have smooth edges, and are noise free.
• Normal—Generally well delineated, but may have some noise and rough
edges.
• Poor—Have jagged edges or other characteristics that might make them hard
to read.
Checksum Group
Note Checksum verification only has meaning for Code 39, Interleaved 2 of 5, and
Linear 2 of 5 bar code types. It is ignored for all other bar code types.
Table D-1. Search Direction Options
Orientation Direction on the Image
0 Horizontal, rotated 0 degrees, read left to right
90 Vertical, rotated 90 degrees, read top to bottom
180 Horizontal, rotated 180 degrees to the right, read right to left
270 Vertical, rotated 270 degrees to the right, read bottom to top