Chart creation method, control apparatus and non-transitory computer-readable storage medium storing chart creation control program

A control apparatus which controls an image forming apparatus including a print section and a color measurement section, the control apparatus comprising:

• a RIP (raster image processing) section that creates a print image of a chart in which a plurality of color patches are arranged;
• and
• an image data processing section that
• gives instructions to the image forming apparatus to print the chart and measure colors of the chart, on a basis of the print image created by the RIP section,
• obtains measured color values of the plurality of color patches of the chart from the image forming apparatus, and
• rearranges the plurality of color patches of the chart so as to restrict spread of average color values calculated for subgroups of color patches in the chart within a predetermined range, the subgroups each consisting of one color patch and at least one neighboring color patch of the one color patch out of the plurality of color patches of the chart, the average color values each being an average of measured color values of color patches forming one of the subgroups.

A non-transitory computer-readable storage medium storing a chart creation control program to be executed in a control apparatus which controls an image forming apparatus including a print section and a color measurement section, the chart creation control program, when being executed by a processor of the control apparatus, causing the control apparatus to perform processing comprising:

• first creating a chart, including
• creating a print image of a chart in which a plurality of color patches are arranged, and
• giving instructions to the image forming apparatus to print the chart and measure colors of the chart;
• performing rearrangement of the plurality of color patches of the chart, the rearrangement including
• obtaining measured color values of the plurality of color patches of the chart from the image forming apparatus, and
• rearranging the plurality of color patches of the chart so as to restrict spread of average color values calculated for subgroups of color patches in the chart within a predetermined range, the subgroups each consisting of one color patch and at least one neighboring color patch of the one color patch out of the plurality of color patches of the chart, the average color values each being an average of measured color values of color patches forming one of the subgroups;
• and
• second creating a chart with the rearranged color patches, includes
• creating a print image of a chart including the rearranged color patches, and
• giving instructions to the image forming apparatus to print the chart including the rearranged color patches and measure colors of the chart.