Edge Determination; Reflectance Minimum - RJS Inspector 5000 Operator's Manual

Inspector 5000™ Auto Optic

Edge Determination

This parameter can be graded 4.0 (A) or 0.0 (F), however
multiple scan averaging can results in grading 4.0 to 0.0
(A to F)
When a symbol contains an edge determination failure
(an element does not cross the global threshold) all other
parameters cannot be analyzed.
In the case of an edge determination failure, symbol
contrast calculations are valid
In the case of an edge determination failure, the
Inspector 5000 will force the Decodability grade to
00% (a 0.0 / F grade)
Other affected grades will be calculated only for that
portion of the symbol which was scanned up to the
point of the edge determination failure

Reflectance Minimum

This parameter can be graded 4.0 (A) or 0.0 (F), however
multiple scan averaging can results in grading 4.0 to 0.0
(A to F)
The reflectance value of the "lightest" space must be at
least twice as great as the reflectance value of the
"darkest" bar; otherwise, the grade will be 0.0 (F).
The parameter grade is determined by:
1. Calculating the edge contrast of every element
edge in a symbol
2. Finding the lowest value (minimum edge contrast)
3. Comparing it to a fixed threshold in the
specification (15%)
If the value is at least as great at the threshold, the grade
is 4.0 (A), otherwise the grade is 0.0 (F).
RJS, Minneapolis, MN
66
Appendix A
003-4500