Chart Information File

The structure of the chart information file is similar to the structure of a standard IT8 file. The chart information file is a text file using UTF-8 character encoding. Enter the following items and values in the chart information file.
    Note:
  • You can create a custom chart based on the sample chart information files available under C:\RicohAutoColorAdjuster\ColorimetryCharts\SampleChartInfoFiles

Field in IT8 File Value
CHART_NAME Enter the chart name using quotation marks. Example: "Measure Sample1".

If you do not enter a CHART_NAME value or the CHART_NAME row is missing from the chart information file, the default Colorimetry Chart name is used as chart title.

  • Avoid using the following characters: /:*?<>\|"
  • Number of characters: up to 250 characters.
PAGE_WIDTH

PAGE_LENGTH

 Enter the paper width and length in the sub-scan direction:
  • Unit: 100 (1 mm, 0.04 inches)
  • Width: from 21000 through 33000
  • Length: from 21000 through 48700

Examples: For an A3 paper of 297 x 420 mm, set the PAGE_WIDTH to 29700, and the PAGE_LENGTH to 42000. For an SRA3 paper of 12.6 x 17.7 inches, set the PAGE_WIDTH to 32000, and the PAGE_LENGTH to 45000.
PATCH_WIDTH

PATCH_HEIGHT

 Enter the width and height of a color patch:
  • Unit: 100 (1 mm, 0.04 inches)
  • Minimum: 700
  • Maximum: 1500

Example: For a patch of 7 x 7 mm, set both the PATCH_WIDTH and the PATCH_HEIGHT to 700.
NUMBER_OF_PATCHES Enter the total number of color patches on the color chart.

Example: 200
COLOR FORMAT CMYK

BEGIN_DATA_FORMAT

SAMPLE_ID CMYK_C CMYK_M CMYK_Y CMYK_K

END_DATA_FORMAT
BEGIN_DATA

END_DATA

 Enter the colors used in the colorimetry chart. Each row contains the values defining a color patch, separated using the tab character.
  • First column: identifier of the color patch, unique in the chart information file. Avoid using blanks in the identifier.
  • Second column: integer value from 0 through 100 corresponding to Cyan.
  • Third column: integer value from 0 through 100 corresponding to Magenta.
  • Forth column: integer value from 0 through 100 corresponding to Yellow.
  • Fifth column: integer value from 0 through 100 corresponding to Black.

Between the BEGIN_DATA and END_DATA lines, enter as many color definitions as specified by the NUMBER_OF_PATCHES value.

Example:

BEGIN_DATA

1 70 40 10 0

...values for 2–199 are not included in this example

200 10 100 30 0

END_DATA

Example of Chart Information File

CHART_NAME "Measure Sample1"

PAGE_WIDTH 29700

PAGE_LENGTH 42000

PATCH_WIDTH 700

PATCH_HEIGHT 700

NUMBER_OF_PATCHES 200

COLOR FORMAT CMYK

BEGIN_DATA_FORMAT

SAMPLE_ID CMYK_C CMYK_M CMYK_Y CMYK_K

END_DATA_FORMAT

BEGIN_DATA

1 70 40 10 0

2 100 20 10 10

3 80 80 100 10

...

200 10 100 30 0

END_DATA
Parent topic: Adding a Custom Colorimetry Chart