CROSS REFERENCE TO RELATED APPLICATIONS

The entire disclosure of Japanese Patent Application No. 2020-091312, filed on May 26, 2020, is incorporated herein by reference in its entirety.

BACKGROUND

Technological Field

The present invention relates to a color parameter generation apparatus, an execution apparatus and a non-transitory computer-readable recording medium.

Description of Related Art

Conventionally, an apparatus has been known, which reads a sample image serving as a sample of a printed matter by an image reading apparatus (e.g., scanner), and, based on the read information, generates a color parameter in the case of forming the printed matter in image forming apparatus.

In a device such as an image reading apparatus (e.g., scanner) or an image forming apparatus, a color value output by the device (RGB value or CMYK value) becomes the color value that depends on the device. Accordingly, the color value of the read information of the image reading apparatus may not match the color value output by the image forming apparatus; thus, in a case where information of the color value is transferred between these devices, color conversion is performed using a predetermined color conversion table (device profile) for converting the color value to a color value independent of the devices.

The apparatus for generating the color parameter for the image forming apparatus and related to the above-described sample image generates the color parameters for the image forming apparatus, using a device profile such as a scanner profile for the image reading apparatus.

In the image reading apparatus, in a case where an image is read, the read image is affected by a flare. The flare is a phenomenon in which the image reading apparatus obtains color information including a mixture of reflected light in each area of the image to be read and reflected light from the periphery of each area caused by a diffused reflection are mixed.

The scanner profile is generated based on the color value read from a chart image in which patches of a plurality of colors are arranged, and thus, each of the colors set by the scanner profile is affected by the flare based on the arrangement of the patches.

For example, in Japanese Patent Application Laid-Open No. 2016-159540, a configuration is known, in which an arrangement order of the patches in the chart image at the time of generating the scanner profile is changed in order to equalize the degree of influence of the flare in each color. This suppresses variations in the degree of influence of the flare in each color.

SUMMARY

However, the sample image read by the apparatus for generating the color parameter and the chart image in generating the scanner profile are different images from each other. Thus, in a case where the degree of influence of the flare at a predetermined position of the read image, which is the read information of the sample image, differs from the degree of influence of the flare of the color corresponding to the predetermined position of the scanner profile, there is a possibility that an accurate color parameter cannot be generated at the predetermined position. In particular, in a case where the color used for the predetermined position of the read image is strongly affected by the flare, the printed matter of the sample image may be printed in an erroneous color.

An object of the present invention is to provide a color parameter generation apparatus capable of accurately generating a color parameter based on a read image, an execution apparatus and a non-transitory computer-readable recording medium.

To achieve at least one of the abovementioned objects, according to an aspect of the present invention, a color parameter generation apparatus reflecting one aspect of the present invention includes:

a hardware processor that generates a color parameter to be used for printing a sample image based on a read image being read information of the sample image, wherein

the hardware processor

determines a degree of a flare at a predetermined position of the read image, and

executes predetermined processing for correcting the color parameter in the predetermined position, based on the determined degree of the flare.

To achieve at least one of the abovementioned objects, according to another aspect of the present invention,

an execution apparatus reflecting one aspect of the present invention relates to a color parameter generation apparatus that generates a color parameter to be used for printing a sample image, based on a read image being read information of the sample image, the execution apparatus including:

a hardware processor that determines a degree of a flare at a predetermined position of the read image, and wherein

the hardware processor executes predetermined processing for correcting the color parameter in the predetermined position based on the determined degree of the flare.

To achieve at least one of the abovementioned objects, according to another aspect of the present invention,

a non-transitory computer-readable recording medium reflecting one aspect of the present invention stores a program for a color parameter generation apparatus, the program causing a computer to perform:

generating a color parameter to be used for printing a sample image based on a read image being read information of the sample image;

determining a degree of a flare at a predetermined position of the read image; and

executing predetermined processing for correcting the color parameter in the predetermined position based on the determined degree of the flare.

