Hardware manual

Impact Reference Guide OCR
3-181 Datalogic Automation Inc.
A Setup is available for this tool. See “How to set up the OCR tool” on page 3-183.
Input Name What it is
Input Image Linked Image
Tool Origin The tool’s origin relative to the entire image space
Region of Interest The area of the image that contains the characters. May contain only
one row of characters
Threshold Type See “Threshold Types” on page 3-186.
Fixed Threshold
Value
The grey level threshold value for fixed single threshold types (in per-
centage)
Noise Level The amount of background noise present in the image. Higher noise
means the character edges must be farther apart. Lower noise allows
character edges that are closer together.
Min/Max Character
Width
The minimum and maximum allowable width of each character. The
parameters are start and end.
Enable Variable
Max Character
Width
If True, the Max value of the Min/Max Character Width property is
allowed to vary to a lower value when it is used to split merged charac-
ters. Enable this setting if characters in the image are very close
together, but mostly all the same width with some small variations due to
the printing process. Enter the value of the maximum width of any char-
acter in the image into the Max Character Width value. The tool will
sense characters narrower than that value and separate them accord-
ingly.
If False, the Max value is fixed to the Min/Max Character Width value
entered.
Min/Max Character
Height
Each character’s minimum and maximum height. Characters should be
a minimum of twenty-eight units high for best results. The parameters
are start and end.
Minimum Spacing
Between Charac-
ters
The least amount of space that will appear between characters
Maximum Vertical
Spacing Within
Characters
If spots are further than this distance above or below a character, then
they are not considered part of the character. By default this value is
Infinity, meaning that all spots are combined vertically. If the value is re-
duced too much, then the characters will start to break up vertically.
Maximum Percent
Size Change
The maximum percentage that the character size may change and still
match the trained character
Minimum Match
Score
Each input character is compared to a verify string character and
assigned a match score. If the score exceeds this value, the character is
added to the output string
Substitution Char-
acter
The character to substitute in the output string for unreadable characters
Train String If this string is present, the tool will use it as the names for the characters
it finds.