Droplet ejecting apparatus and computer-readable medium

A non-transitory, computer-readable medium storing computer-readable instructions therein that, when executed by a processor of a droplet ejecting apparatus, cause the processor to execute the steps of:

• storing first image data relating to an image to be recorded on a first surface of a recording medium and second image data relating to an image to be recorded on a second surface of the recording medium, each of the first image data and the second image data being image data including a plurality of pixels arranged in a matrix, each of the plurality of pixels having a gray level value;
• extracting one or more overlap areas from areas contained in the first image data and the second image data, each of the one or more overlap areas containing at least a predetermined number of overlapping pixels, each of the overlapping pixels being either a pixel for the first surface that has a gray level greater than zero or a pixel for the second surface that has a gray level value greater than zero,
• determining a setting of a drying process to dry liquid ejected from a droplet ejecting head of the droplet ejecting apparatus onto the second surface for each of the one or more overlap areas extracted based on a total volume of liquid to be ejected to the first surface and the second surface or based on a total of the gray level values of the first image data and the gray level values of the second image data,
• determining a setting of the drying process for the areas other than the one or more overlap areas based on a volume of the liquid to be ejected to the second surface or based on the gray level values of the second image data,
• determining a maximum setting of the drying process out of the determined settings of the drying process is a setting of the drying process to dry the second surface of the recording medium,
• changing the volume of the liquid to be ejected to the first surface in the overlap areas or the total of the gray level values of the first image data in the overlap areas with an amount of time elapsed from when droplets reach the first surface in the overlap areas to when droplets reach the second surface in the overlap areas, and
• for the overlap areas, determining the drying process setting determined from the volume of the liquid to be ejected to the first surface that was changed and the volume of the liquid to be ejected to the second surface or a total of the gray level values of the first image data that was changed and the gray level values of the second image data.

A droplet ejecting apparatus comprising:

• a droplet ejecting head configured to eject liquid for recording an image on a recording medium;
• a conveying mechanism configured to convey the recording medium such that a first surface of the recording medium faces the droplet ejecting head and then configured to convey the recording medium such that a second surface of the recording medium opposite to the first surface, faces the droplet ejecting head;
• a storage device configured to store first image data relating to an image to be recorded on the first surface of the recording medium and second image data relating to an image to be recorded on the second surface of the recording medium, each of the first image data and the second image data being image data including a plurality of pixels arranged in a matrix, each of the plurality of pixels having a gray level value;
• a control device configured to
• perform extracting of one or more overlap areas from areas contained in the first image data and the second image data, each of the one or more overlap areas containing at least a predetermined number of overlapping pixels, each of the overlapping pixels being either a pixel for the first surface that has a gray level greater than zero or a pixel for the second surface that has a gray level value greater than zero,
• perform a drying process setting determining process including
• determining a drying process setting to dry liquid ejected from the droplet ejecting head onto the second surface for each of the one or more overlap areas extracted based on a total volume of the liquid to be ejected to the first surface and the second surface or based on a total of the gray level values of the first image data and the gray level values of the second image data,
• determining a drying process setting for the areas other than the one or more overlap areas based on the volume of liquid to be ejected to the second surface or based on the gray level values of the second image data,
• determining a maximum setting of the drying process out of all of the determined settings of the drying process is a setting of the drying process to dry the second surface of the recording medium,
• changing the volume of the liquid to be ejected to the first surface in the overlap areas or the total of the gray level values of the first image data in the overlap areas with an amount of time elapsed from when droplets reach the first surface in the overlap areas to when droplets reach the second surface in the overlap areas, and
• for the overlap areas, determining the drying process setting determined from the volume of the liquid to be ejected to the first surface that was changed and the volume of the liquid to be ejected to the second surface or a total of the gray level values of the first image data that was changed and the gray level values of the second image data.