Granted Patent B2

US 12,456,228 · App. 18/383,613 · Granted Oct 28, 2025

Inventors: Ryuji Murabayashi (Tokyo, JP); Osamu Yasukochi (Tokyo, JP)

Assignee: RISO KAGAKU CORPORATION

G06T7/90G06T11/001G06T2207/10024

Abstract

Claims (67)

1 . An information processing apparatus comprising:

a determiner circuit configured to determine whether two adjacent colors of a combination thereof in inputted image data are likely to be indistinguishable by a colorblind person; and

a decider circuit configured, when the determiner circuit determines that the two adjacent colors are likely to be indistinguishable by the colorblind person,

to change at least one color of the two adjacent colors to a color distinguishable by the colorblind person from the other color in the two adjacent colors, and

to minimize the degree of change of at least a color difference of the changed at least one color so that a person with normal color vision can still distinguish the changed at least one color from the other color.

2 . The information processing apparatus according to claim 1 , wherein the determiner circuit is configured to determine whether a colorblind person is likely to confuse the two adjacent colors based on a brightness difference between the two adjacent colors.

3 . An information processing method executed by a computer, the method comprising:

determining whether two adjacent colors of a combination thereof in inputted image data are likely to be indistinguishable by a colorblind person; and

deciding, when the determining operation determines that the two adjacent colors are likely to be indistinguishable by the colorblind person,

to change at least one color of the two adjacent colors to a color distinguishable by the colorblind person from the other color in the two adjacent colors, and

to minimize the degree of change of at least a color difference of the changed at least one color so that a person with normal color vision can still distinguish the changed at least one color from the other color.

4 . A non-transitory computer-readable storage medium storing an information processing program causing a computer to execute processing comprising:

determining whether two adjacent colors in inputted image data are likely to be indistinguishable by a colorblind person; and

deciding, when the determining operation determines that the two adjacent colors are likely to be indistinguishable by the colorblind person,

to change at least one color of the two adjacent colors to a color distinguishable by the colorblind person from the other color in the two adjacent colors, and

to minimize the degree of change of at least a color difference of the changed at least one color so that a person with normal color vision can still distinguish the changed at least one color from the other color.

5 . The information processing apparatus according to claim 1 , wherein the decider circuit is configured to minimize the degree of change of at least the color difference of the changed at least one color by

extracting colors in a first extraction from the inputted image data whose brightness difference with the other color is greater than a constant threshold,

extracting, in a second extraction, a first color from the colors of the first extraction whose color difference with the at least one color is the smallest, and

setting the first color extracted in the second extraction as the changed at least one color that

is distinguishable by the colorblind person from the other color, and

minimizes the degree of change of the color difference of the changed at least one color for a person with normal color vision.

6 . The information processing apparatus according to claim 5 , wherein in the event the second extraction extracts plural first colors whose color difference with the at least one color is the smallest, the decider circuit is configured to select the first color from among the plural first colors whose brightness difference with the at least one color is the smallest.

7 . The information processing apparatus according to claim 1 , wherein

the input image data has a character image and a background image against which the character image is placed, and

one of the two adjacent colors is the color of the character image, and the other of the two adjacent colors is the color of the background image.

8 . The information processing apparatus according to claim 7 , wherein

the apparatus further comprises a terminal including a display,

the display of the terminal displays an application screen displaying

a display frame displaying the character image and background image,

a color combination button for instructing execution of the operation of the determiner circuit,

a result display portion in which the result of the operation of the determiner circuit is displayed by displaying the two adjacent colors before and after the at least one of the two colors is changed, and

a page selection portion displaying icons representing different pages of the input image data.

9 . The information processing method according to claim 3 , wherein the deciding operation minimizes the degree of change of at least the color difference of the changed at least one color by

extracting colors in a first extraction from the inputted image data whose brightness difference with the other color is greater than a constant threshold,

extracting, in a second extraction, a first color from the colors of the first extraction whose color difference with the at least one color is the smallest, and

setting the first color extracted in the second extraction as the changed at least one color that

is distinguishable by the colorblind person from the other color, and

minimizes the degree of change of the color difference of the changed at least one color for a person with normal color vision.

10 . The information processing method according to claim 9 , wherein in the event the second extraction extracts plural first colors whose color difference with the at least one color is the smallest, the deciding operation selects the first color from among the plural first colors whose brightness difference with the at least one color is the smallest.

11 . The information processing method according to claim 3 , wherein

the input image data has a character image and a background image against which the character image is placed, and

one of the two adjacent colors is the color of the character image, and the other of the two adjacent colors is the color of the background image.

12 . The information processing method according to claim 11 , further comprising

displaying on a display of a terminal an application screen displaying

a display frame displaying the character image and background image,

a color combination button for instructing execution of the determining operation,

a result display portion in which the result of the determining operation is displayed by displaying the two adjacent colors before and after the at least one of the two colors is changed, and

a page selection portion displaying icons representing different pages of the input image data.

13 . The non-transitory computer-readable storage medium storing an information processing program according to claim 4 , wherein

the deciding operation minimizes the degree of change of at least the color difference of the changed at least one color by

extracting colors in a first extraction from the inputted image data whose brightness difference with the other color is greater than a constant threshold,

extracting, in a second extraction, a first color from the colors of the first extraction whose color difference with the at least one color is the smallest, and

setting the first color extracted in the second extraction as the changed at least one color that

is distinguishable by the colorblind person from the other color, and

minimizes the degree of change of the color difference of the changed at least one color for a person with normal color vision.

14 . The non-transitory computer-readable storage medium storing an information processing program according to claim 13 , wherein

in the event the second extraction extracts plural first colors whose color difference with the at least one color is the smallest, the deciding operation selects the first color from among the plural first colors whose brightness difference with the at least one color is the smallest.

15 . The non-transitory computer-readable storage medium storing an information processing program according to claim 4 , wherein

the input image data has a character image and a background image against which the character image is placed, and

one of the two adjacent colors is the color of the character image, and the other of the two adjacent colors is the color of the background image.

16 . The non-transitory computer-readable storage medium storing an information processing program according to claim 15 , wherein the information processing program causes the computer to execute processing further comprising

displaying on a display of a terminal an application screen displaying

a display frame displaying the character image and background image,

a color combination button for instructing execution of the determining operation,

a result display portion in which the result of the determining operation is displayed by displaying the two adjacent colors before and after the at least one of the two colors is changed, and

a page selection portion displaying icons representing different pages of the input image data.

Assignments (1)

Priority Claims (3)

Continuity (1)

References Cited (21)