Microscan MS-4 User Manual download pdf (Page 222)

8-10 MS-4 Imager User’s Manual

ISO/IEC 16022 Symbol Quality Output

Symbol Quality Parameters for Data Matrix symbols specified by ISO/IEC 16022.

Symbol Contrast

Print Growth

Usage: Lets the user know if contrast settings are less than acceptable.

Definition: All the pixels that fall within the area of the test symbol, including its

required zone, will be sorted by their reflectance values to select the

darkest 10% and the lightest 10% of the pixels. The arithmetic mean of

the darkest and the lightest pixels is calculated and the difference of the

two means is the Symbol Contrast.

(ANSI) Symbol Contrast grading is defined this way:

A (4.0) if SC > 70%

C (2.0) if SC > 40%

F (0.0) if SC < 20%

B (3.0) if SC > 55%

D (1.0) if SC > 20%

If enabled, the symbol contrast is appended to the symbol data according

to the ISO/IEC 16022 Symbol Quality Output Mode setting.

Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>

Default: Disabled

Options: 0 = Disabled 1 = Enabled

Definition: The extent to which dark or light markings appropriately fill or exceed

their module boundaries. These values are determined by counting pixels

in the clock pattern of the binary digitized image, then comparing it to a

nominal value and minimum and maximum values. The print growth

grade is defined in this way:

A (4.0) if -.050 < PG < 0.50 B (3.0) if -.070 < PG < 0.70

C (2.0) if -.085 < PG < 0.85 D (1.0) if -.10 < PG < 1.00

F (0.0) if PG < -1.00 or PG > 1.00

If enabled, the print growth is appended to the symbol data according to

the ISO/IEC 16022 Symbol Quality Output Mode setting.

Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>

Default: Disabled

Options: 0 = Disabled 1 = Enabled

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Microscan MS-4 User Manual Page 222