M-9500-3.0.6-0 INTEGRA 9500-9505 Operations Manual – English
Approved
: Spike Reed
Effective:
15 Nov 2010
Supersedes:
28 Jan 2010
LVS®
CONFIDENTIAL
All contents copyright © LVS® 2010 Page 42 of 82
4. Grade Bar Graph
To the right of the barcode image is a graph representing the ISO grade for every
scan line. It is called the Grade Bar Graph and displays whatever ISO parameter
is checked in the View section. For 1D symbologies, there are 4 parameters to
choose from: Contrast, Modulation, Decodability, and Defects. This helps you to
identify what parts of the barcode have quality issues. The color refers to the
grade in terms of the legend on the bottom right of the screen.
The Grade Bar Graph displays line-for-line grade information for every line of the
bar height (see Figure below). If there is no color code indicated for a specific
line, then the line was not decodable. This would be counted as a blemish.
Bar Height Measurement
The method of determining the height of a barcode is based on the number of
lines decoded within the height. The software takes the first decoded line and
decodes all lines until the end of the barcode; and, because we know the size of
one pixel, the height of the barcode can be calculated. If some lines either at the
top or bottom of the sector could not be decoded, the height calculation will be
incorrect.
Grade Bar
Graph
