JP2016206301A - Information processing device, image display method, compute program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing device that reduces an influence on a design of the color fonts, and improves visibility of the color fonts.SOLUTION: An information processing device 10 comprises: a color difference determination unit 208 that determines whether a path consisting of an image representing a character of a color of the same system as a background color of a background where the character is drawn is included in a plurality of paths consisting thereof; a path extraction unit 205 that, when it is determined that the path of the same system as the background color is included in the plurality of paths, extracts another path having a prescribed relationship set to a color of the path from the plurality of paths; a path drawing color change unit 206 that changes the path of the color of the same system as the background color of the plurality of paths, and the color of the path extracted by the path extraction unit 205 with the prescribed relationship maintained; and a drawing unit 207 that draws each path on the background, using a color of the changed path to thereby form the image.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an information processing apparatus that displays characters composed of a plurality of colors on a display.

  Information processing apparatuses such as smartphones, tablet terminals, and personal computers in recent years can display color fonts such as pictographs on a display by drawing a plurality of colored glyphs superimposed on each other. Since a color font is composed of a combination of multiple colors, it is difficult to distinguish from the background if some of the colors are similar to the background color or if the background of the photo itself contains a large number of colors. Sometimes. Even in such a case, the following techniques have been proposed to ensure the visibility of characters using color fonts. For example, a technique is disclosed in which a plurality of combinations of drawing colors are prepared in advance, and characters and drawing lines are displayed in colors selected from a plurality of drawing colors according to the background color (Patent Document 1).

JP 2002-278538 A

  In color fonts such as pictograms, if the above technique is used to ensure visibility, each glyph is replaced with a color corresponding to the background color, which may impair the design intention of the color font. In addition, since it is necessary to prepare a plurality of drawing colors for each glyph, the storage capacity for displaying color fonts increases, and the overhead of drawing processing increases.

  In order to solve the above problems, it is a main object of the present invention to provide an information processing apparatus that reduces the influence on the design of a color font and improves the visibility of the color font.

  According to the information processing apparatus of the present invention, in response to an instruction to draw a character, the plurality of constituent members constituting the image representing the character have constituent members of similar colors to the background color of the background on which the character is drawn. A color difference determining unit that determines whether or not a color component is included, and a color having a predetermined relationship with a color of the component member when it is determined that the component member having a similar color to the background color is included in the plurality of component members Extraction means for extracting other constituent members set with the plurality of constituent members, the constituent member having the same color as the background color among the plurality of constituent members, and the configuration extracted by the extracting means Color changing means for changing the color of the member while maintaining the predetermined relationship; and drawing means for forming the image by drawing each constituent member on the background using the changed color of the constituent member; It is characterized by providing.

  According to the present invention, by changing the color of a component having the same color as the background color and the color of the component determined to have a predetermined relationship while maintaining the predetermined relationship, the intention of the font design is not impaired. , Visibility can be improved.

The hardware block diagram of information processing apparatus. The functional block diagram of information processing apparatus. (A)-(d) is explanatory drawing of image data. The flowchart showing the display process of an image. 7 is a flowchart showing path extraction processing. (A)-(g) is explanatory drawing of a path | route extraction process and a drawing color change process. The functional block diagram of information processing apparatus. (A)-(d) is explanatory drawing of the display process of an image. (A)-(c) is explanatory drawing of the display process of an image.

  Hereinafter, embodiments will be described in detail with reference to the drawings. However, the components described in the present embodiment are merely examples, and are not intended to limit the scope of the present invention only to them.

[First Embodiment]
FIG. 1 is a hardware configuration diagram of the information processing apparatus according to the present embodiment. The information processing apparatus 10 is connected to the input device 20 and the display 30. The information processing apparatus 10 is realized by a smartphone, a tablet terminal, a personal computer, or the like. The input device 20 is a keyboard, a mouse, a touch panel, or the like. The input device 20 inputs an instruction to the information processing device 10 by a user operation. The display 30 is an FPD (Flat Panel Display) or a CRT (Cathode Ray Tube). An image is displayed on the display 30 by the information processing apparatus 10. The information processing device 10, the input device 20, and the display 30 may be integrally configured. In the present embodiment, an example in which the information processing apparatus 10 displays an image including a color font on the display 30 will be described. However, an output device that outputs an image so as to be visible may be used in addition to the display 30. For example, the present embodiment can also be applied when an image including a color font is output by an image forming apparatus such as a printer.

  The information processing apparatus 10 includes a central processing unit (CPU) 102, a read only memory (ROM) 103, a random access memory (RAM) 104, and an I / O interface 105. The CPU 102, the ROM 103, the RAM 104, and the I / O interface 105 are communicably connected via the bus 101. The CPU 102 reads out a computer program from the ROM 103 and executes it using the RAM 104 as a work area, thereby controlling the operation of the information processing apparatus 10. In the present embodiment, font data representing a font is stored in the ROM 103 and used after being expanded in the RAM 104.

  FIG. 2 is a functional block diagram of the information processing apparatus 10. Here, functions required when the information processing apparatus 10 displays a color font will be described. The information processing apparatus 10 includes a storage unit 200, a background color acquisition unit 201, a character information acquisition unit 202, a path shape acquisition unit 203, a path drawing color acquisition unit 204, a path extraction unit 205, a path drawing color change unit 206, and a drawing unit 207. And the color difference determination unit 208. These functions are realized by the CPU 102 executing a computer program.

  The storage unit 200 stores image data representing an image displayed on the display 30. The image is configured by displaying characters in a predetermined font on the background. The characters are formed by color fonts such as pictographs, for example. FIG. 3 is an explanatory diagram of image data. The image data includes information regarding the color of the background 401 (background color) and character information for setting a font of characters included in the image. In the present embodiment, an example in which a path is used as a constituent member of a font (character) will be described, but the same processing can be performed when a glyph is used as a constituent member. The character information includes, for each character, a path drawing order, a path ID for identifying the path, and a palette ID for identifying the color of the path. In the present embodiment, the background color and the pass color are expressed in a format (representation used in HTML (HyperText Markup Language)) in which RGB, which are the three primary colors of light, are each expressed as an 8-bit integer. The storage unit 200 may be an external device (for example, a memory disk or a server device on the Internet) connected via various interfaces.

  As shown in FIG. 3A, the background color of this embodiment is a uniform color and is represented by “# 000F8” in a hexadecimal color code. As shown in FIG. 3B, the character information of this embodiment is stored for characters 402, 403, and 404 to be drawn. The character 402 is configured by superimposing paths whose path IDs are represented by path A, path B, path C, and path D in this order. The color of path A is represented by color W, the color of path B is represented by color X, the color of path C is represented by color Y, and the color of path D is represented by each palette ID of color Z. FIG. 3C is an exemplary diagram of a shape table representing the relationship between the path ID and the path shape. The shape table is stored in the storage unit 200. Although the path shape is schematically shown here, the path shape for each path ID is stored in the storage unit 200 in the form of coordinate values, path commands, and the like. FIG. 3D is an illustration of a drawing color table that represents the relationship between the palette ID and the drawing color. The drawing color table is stored in the storage unit 200. The drawing color of this embodiment is represented by a hexadecimal color code like the background color, and is stored in the storage unit 200 for each palette ID.

The background color acquisition unit 201 acquires information representing the background color of the image from the image data stored in the storage unit 200.
The character information acquisition unit 202 acquires character information related to characters to be drawn from the image data stored in the storage unit 200.
The path shape acquisition unit 203 acquires the path shape according to the character information acquired by the character information acquisition unit 202. The path shape acquisition unit 203 acquires a path shape by referring to the shape table using the path ID included in the character information.
The path drawing color acquisition unit 204 acquires the color of the path according to the character information acquired by the character information acquisition unit 202. The path drawing color acquisition unit 204 acquires the path drawing color by referring to the drawing color table using the palette ID included in the character information.

The path extraction unit 205 extracts two or more paths whose drawing colors have a predetermined relationship. The path extraction unit 205 extracts a path by determining how each drawing color is arranged in a color space and having a predetermined relationship, for example.
The path drawing color changing unit 206 changes the drawing color of each path determined by the path extracting unit 205 to have a predetermined relationship. The path drawing color changing unit 206 changes the drawing color of each pass so that the visibility with respect to the background color is enhanced while maintaining a predetermined relationship.
The drawing unit 207 draws each path on the background and forms an image of characters to be displayed on the display 30. When the drawing color of the path is changed, the drawing unit 207 draws the path using a color reflecting the changed content.
The color difference determination unit 208 determines whether there is a path in which a drawing color similar to the background color is set. For example, the color difference determination unit 208 calculates the color difference between the value representing the background color and the value representing the drawing color of the path, and determines whether or not there is a path whose color difference is equal to or less than a threshold value. The color difference is expressed by a distance in the RGB color space, for example. The color difference determination unit 208 calculates the color difference by calculating the square root of the sum of the squares of the differences between the R, G, and B values.

  FIG. 4 is a flowchart showing image display processing by such an information processing apparatus 10. In the following description, processing for displaying an image of the character 402 using the image data of FIG. 3 will be described.

  When the display process is started, the background color acquisition unit 201 acquires the color of the background 401 from the image data stored in the storage unit 200 (S301). Here, the background color acquisition unit 201 acquires the background color “# 000F8”. The character information acquisition unit 202 acquires character information constituting the character to be drawn from the storage unit 200 (S302). Here, the character information acquisition unit 202 acquires character information related to the character 402.

  The path shape acquisition unit 203 refers to the shape table according to the character information acquired by the character information acquisition unit 202, and acquires a path shape (S304). The path drawing color acquisition unit 204 refers to the drawing color table according to the character information acquired by the character information acquisition unit 202, and acquires the drawing color (S305). The character information of the character 402 acquired by the character information acquisition unit 202 includes path A, path B, path C, and path D. The path shape acquisition unit 203 and the path drawing color acquisition unit 204 repeatedly perform the processes of S304 and S305, and the path shape and palette ID of the path A, path B, path C, and path D are color W, color X, color Y, The drawing color of color Z is acquired (S303, S306). Here, the path drawing color acquisition unit 204 acquires the drawing colors “# 00FF00”, “# 0000FF”, “# 0000C0”, and “# 000080”.

  The color difference determination unit 208 calculates the color difference between the background color and the drawing color of each pass, and determines whether there is a path in which the color difference is equal to or less than the threshold (S307). In the present embodiment, each of R, G, and B of the background color and the drawing color of each pass is encoded to a value of “0 to 255”. In this embodiment, the color difference threshold is “16”.

  When there is a path with a color difference equal to or less than the threshold (S307: Y), the path extraction unit 205 sets another path for which a drawing color having a predetermined relationship with the drawing color of the path with the color difference equal to or less than the threshold is set. Is extracted (S308). In the present embodiment, the drawing color “# 0000FF” of the color X of the path B of the character 402 has a color difference of “7” from the background color “# 0000F8”. Since this is less than or equal to the threshold value, the path extraction process of S308 is performed.

  FIG. 5 is a flowchart showing path extraction processing. The path extraction unit 205 calculates a vector between each drawing color for a combination of a drawing color of a path whose color difference from the background color is equal to or less than a threshold and a drawing color of another path, and normalizes the calculated vector (S501 to S504). In the present embodiment, the path extraction unit 205 calculates and normalizes a vector of the drawing color of the path B and the drawing colors of the path A, the path C, and the path D. The path extraction unit 205 extracts a combination of paths set with drawing colors that match the normalized vectors (S505).

  FIG. 6 is an explanatory diagram of a path extraction process and a drawing color change process. FIG. 6A is a diagram in which the drawing color value and the background color value of each path constituting the character 402 are mapped to the RGB color space represented by the orthogonal coordinate system. The origin of the RGB color space is “# 000000”. The background color, the path B drawing color (color X) in which the color difference from the background color is equal to or less than the threshold, and the path C and D drawing colors (color Y, Z) are on the B axis. The drawing color (color W) of path A is on the G axis.

  In FIG. 6A, the vectors of the drawing color of pass B where the color difference from the background color is equal to or less than the threshold and the drawing colors of other passes A, C, and D are color X to color W and color X to color. It is represented by the length and direction of the line segment from Y, color X to color Z. FIG. 6B shows a component before normalization and a component after normalization of each vector. The vector that matches after normalization is a vector from color X to color Y and from color X to color Z. The path extraction unit 205 extracts a combination of these two drawing colors. In other words, the path extraction unit 205 extracts two or more other drawing colors arranged in a straight line through the drawing color values of the path B in the RGB color space, and the two or more of these drawing colors that are set are set. Extract the path. Note that the path extraction unit 205 regards the normalized vectors as being the same vector even if they are reversed.

  When a path is extracted by the above processing, the path drawing color changing unit 206 changes the drawing color of each path based on the relationship between the extracted drawing colors (S309). In the present embodiment, the drawing color determined to have a small color difference from the background color is the color X of the path B, and the drawing color determined to be in a predetermined relationship with the color X is the color Y of the path C and the path D. Color Z. Further, the relationship between the drawing colors of color X, color Y, and color Z is that they are arranged on a straight line in the RGB color space. The path drawing color changing unit 206 converts the drawing color of each path in the RGB color space so that the color difference between the color X of the path B and the background color is larger than the threshold while maintaining this relationship.

As an example, a method of translating drawing color values in the RGB color space while maintaining a linear arrangement relationship will be described. When performing the parallel movement, the parallel movement amount is minimized so that the drawn color value after the movement is within the range of the RGB color space (0 to 255 in the R, G, and B directions). At the time of translation, as shown in FIG. 6C, a perpendicular vector from the background color to a straight line in which the color X, color Y, and color Z are arranged is calculated, and the value of each drawing color is set in the extending direction of the perpendicular vector. Translate.
In this embodiment, in order to minimize the amount of translation, translation in the (r, g, 0) direction that satisfies “r ² + g ² = 16 ² ” is a candidate. In the example of FIG. 6A, since the background color is also on the same straight line as the color X, color Y, and color Z in the RGB color space, the path drawing color changing unit 206 cannot calculate a perpendicular vector. In such a case, for example, the parallel movement amount is set such that the straight line is farthest from the drawing color (color W) determined to be irrelevant in the processing of S308. Here, the translation amount is (15, 0, 0). FIG. 6D shows the drawing colors in the RGB color space that are translated by such a translation amount. The color X is changed to “# 0F00FF”, the color Y is changed to “# 0F00C0”, and the color Z is changed to “# 0F0080”.

  When there is no path in which the color difference is equal to or less than the threshold (S307: N), or when the drawing color change processing for each path is completed, the drawing unit 207 draws a path based on the changed drawing color and draws characters. The image is formed and an image is generated (S310). The CPU 102 displays the drawing result on the display 30 and ends the process. With the above processing, when drawing a character in which paths each having a set color are superimposed, even if the color of the path is changed, the intention of the font design is not impaired. In addition, since the character is displayed with a large color difference from the background color, the visibility of the character is improved.

In the above example, the path extraction unit 205 extracts a path in which the drawing color values in the RGB color space are arranged on a straight line in the processing of S308. May be extracted. For example, the path extraction unit 205 may extract the relationship between the drawing colors of each path using a color space with hue, brightness, and saturation as parameters. FIG. 6E is an exemplary diagram of a color space using hue, brightness, and saturation as parameters, and is expressed in polar coordinates. The relationship between the drawing colors to be extracted is, for example, that the hues match or the saturations match.
Further, it is possible to extract relationships other than the drawing colors arranged in a straight line in the color space. Further, a relationship with the background color in addition to the drawing color may be used. For example, in the RGB color space, the drawing color value of each pass exists on a sphere centered on the background color value, that is, the drawing color having a relationship in which the color difference from the background color value is the same value is extracted. May be. Further, in the present embodiment, the condition that the vectors match is a condition that there is a relationship, but if the vectors after normalization are within a certain allowable range, they may be regarded as matching.

In the above example, the path drawing color changing unit 206 performs the color changing process by translating the drawing color in the RGB color space in the process of S309. The color may be changed by this method.
For example, in the RGB color space, a change that rotates in a predetermined direction around the origin while maintaining a straight line in which the drawing colors are arranged, or each component value of the drawing color may be multiplied by a predetermined scale value. . In general, by multiplying the drawing colors R, G, and B by a matrix as shown in FIG. 6 (f), the drawing colors arranged on the straight line remain arranged on the straight line after conversion. is there.

  Further, in the present embodiment, the color change process in the case where the drawing colors are arranged in a straight line has been described, but the color change process may be different depending on the type of the relationship between the drawing colors. For example, as shown in FIG. 6G, in the RGB color space, when the drawing color value exists on a sphere centered on the background color value, the drawing is performed so that the radius of the sphere is increased. The color may be changed. That is, in the RGB color space, the drawing color value having the same color difference from the background color value may be changed so that the color difference from the background color value becomes large. For example, the color changing process may be performed using a color space including hue, brightness, and saturation. For example, the path drawing color changing unit 206 changes the drawing color by changing the hue angle while maintaining the lightness and saturation.

[Second Embodiment]
The drawing color of the path may be changed in consideration of whether or not the path is adjacent to the background, in addition to the relationship between the drawing colors or the relationship between the drawing colors including the background color. The hardware configuration of the information processing apparatus according to the present embodiment is the same as the hardware configuration (see FIG. 1) of the information processing apparatus 10 according to the first embodiment, and a description thereof will be omitted.

  FIG. 7 is a functional block diagram of the information processing apparatus 11 according to the second embodiment. The information processing apparatus 11 functions as an adjacency determination unit 701 in addition to the functions of the information processing apparatus 10 of the first embodiment. These functions are functions necessary for displaying a color font, which is realized by the CPU 102 executing a computer program. The adjacency determination unit 701 determines whether or not a path constituting a character is adjacent to the background of the image.

  FIG. 8 is an explanatory diagram of such an image display process performed by the information processing apparatus 11. FIG. 8A is a flowchart showing image display processing. The same step number is attached to the same processing as the image display processing of the first embodiment. Description of the same processing is omitted. Here, the display process of the character 403 in FIG. 3B will be described. A character 403 includes a path E, a path B, a path C, and a path D, and the drawing colors are a color W, a color X, a color Y, and a color Z, respectively. The background color is “# 0000F8”.

  After acquiring the background color, the path E, the path B, the path C, and the path D of the path D, and the drawing color, the information processing apparatus 11 determines that the color difference from the background color is equal to or less than the threshold by the color difference determination unit 208 It is determined whether or not there is a path in which the drawing color is set (S307). In this embodiment, the color difference between the color X of the path B and the background color is equal to or less than the threshold value.

  The adjacency determination unit 701 determines whether or not the drawing color path for which the color difference from the background color is determined to be equal to or smaller than the threshold is in contact with the background (S801). Here, it is determined whether or not the path B is in contact with the background. The adjacency determination unit 701 confirms the outline of the union area of the areas surrounded by all the paths B, C, D, and E that form the character 403. FIG. 8B is an exemplary diagram of a union path 802 synthesized from the path B, the path C, the path D, and the path E. The adjacency determination unit 701 determines whether or not the path B shares an outline with the union path 802. FIG. 8C is a diagram illustrating the contours of the union path 802 and the path B. As is clear from FIG. 8C, the path B does not share the outline with the union path 802. Therefore, the adjacency determination unit 701 determines that the path B is not in contact with the background. Note that, as the path C shown in FIG. 8D, the path sharing the outline with the union path 802 is determined to be adjacent to the background.

  If the drawing color path for which the color difference from the background color is determined to be equal to or less than the threshold value is in contact with the background (S801: Y), the processing of S308 and S309 is performed. When there is no path where the color difference is less than or equal to the threshold (S307: N), when the path of the drawing color whose color difference from the background color is determined to be less than or equal to the threshold is not in contact with the background (S801: N), or After changing the drawing color, the drawing unit 207 draws a path to generate an image (S310). The CPU 102 displays the drawing result on the display 30 and ends the process.

  With the above processing, when drawing a character in which paths each having a set color are superimposed, even if the color of the path is changed, the intention of the font design is not impaired. In addition, since the character is displayed with a large color difference from the background color, the visibility of the character is improved. Furthermore, since the drawing color is changed only when a path having a color similar to the background is in contact with the background, it is possible to improve the visibility of characters while reducing the processing load during drawing.

[Third Embodiment]
If the path is set to the same drawing color for multiple characters and it is necessary to change the drawing color of the path for a given character, the path is set to the same drawing color even when used for other characters. You may change to In this case, by making the same drawing color for a plurality of characters, it is possible to prevent the intention of character design by the path from being impaired. Further, the color to be changed is determined by considering a color of a path other than the path constituting the character with a plurality of characters. The hardware configuration and functional blocks of the information processing apparatus according to the present embodiment are the same as the hardware configuration (see FIG. 1) and functional blocks (see FIG. 2) of the information processing apparatus 10 according to the first embodiment, and a description thereof will be omitted. To do.

  FIG. 9 is an explanatory diagram of such an image display process by the information processing apparatus 10. FIG. 9A is a flowchart showing image display processing. The same step number is attached to the same processing as the image display processing of the first embodiment. Description of the same processing is omitted. Here, the display process of the characters 402 and 404 in FIG. 3B will be described. The character 402 includes a path A, a path B, a path C, and a path D, and the drawing colors are a color W, a color X, a color Y, and a color Z, respectively. A character 404 includes a path A, a path B, a path C, and a path D, and the drawing colors are a color V, a color X, a color Y, and a color Z, respectively. The character 404 is composed of a path common to the character 402, but the drawing color of the path A is different. The background color is “# 0000F8”.

  After acquiring the background color by the background color acquisition unit 201, the information processing apparatus 10 performs the processes of S302 to S306 for all characters included in the character string to be rendered (S901, S902). The color difference determination unit 208 determines that the color difference between the color X, which is the drawing color of the path B of the character 402 and the character 404, is less than or equal to the threshold color (S307: Y).

  The path extraction unit 205 extracts another path in which a drawing color having a predetermined relationship with the drawing color of the path B is set (S308). FIG. 9B is an exemplary diagram in which the drawing colors set in the paths constituting the character 402 and the character 404 are mapped in the RGB color space. A white circle represents a drawing color set for a path constituting the character 402, and a hatched circle represents a drawing color set for a path constituting the character 404.

  The path extraction unit 205 detects a path that is used in common by different characters 402 and 404, and detects whether or not the drawing colors set in the detected path match. In the present embodiment, the path B, the path C, and the path D are used in common, and the drawing colors of these paths also match. The color X, which is the drawing color for which the color difference from the background color determined in S307 is equal to or less than the threshold, is set to pass B. As described in the first embodiment, the color X, the color Y, and the color Z are arranged on a straight line in the RGB color space.

  In such a case, similarly to the first embodiment, the path drawing color changing unit 206 translates the colors X, Y, and Z so that the color difference from the background color is equal to or greater than the threshold value, thereby changing the drawing color. Change (S309). The path drawing color changing unit 206 considers the relationship between the color W set for the path A of the character 402 and the color V set for the path A of the character 404 as the direction of translation. For example, the path drawing color changing unit 206 minimizes the sum of the squares of the distances from the color W and the color V, and balances the colors as close as possible from both the color V and the color W. Calculate the translation amount. In the example of FIG. 9B, the points where “r” and “g” have the same value are calculated in the parallel movement amount (r, g, 0). When the threshold value is “16”, 10 <r = g <11. Therefore, the path drawing color changing unit 206 sets the color X to “# 0B0BFF”, the color Y to “# 0B0BC0”, and the color Z to “# 0B0B80”. Change to

  The drawing unit 207 draws an image including the characters 402 and 404 by drawing the path whose drawing color has been changed in this way (S310). The CPU 102 displays the drawing result on the display 30 and ends the process. With the above processing, when drawing a character in which paths each having a set color are superimposed, even if the color of the path is changed, the intention of the font design is not impaired. In addition, since the character is displayed with a large color difference from the background color, the visibility of the character is improved.

[Other Embodiments]
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and the computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

Claims (14)

A color difference for determining whether a plurality of constituent members constituting an image representing the character include a constituent member having a color similar to the background color of the background on which the character is drawn in response to an instruction to draw the character A determination means;
When it is determined that the constituent members having the same color as the background color are included in the plurality of constituent members, the other constituent members in which a color having a predetermined relationship with the color of the constituent members is set Extraction means for extracting from the components;
A color changing unit that changes the color of the structural member that is similar to the background color among the plurality of structural members, and the color of the structural member extracted by the extracting unit, while maintaining the predetermined relationship;
Drawing means for forming the image by drawing each component on the background using the changed color of the component; and
Information processing device. If the difference between the value representing the color of the component and the value representing the background color is equal to or less than a threshold, the color difference determination unit determines that the color of the component is similar to the background color;
The color changing unit is configured such that the difference between the value representing the background color and the color of the component extracted by the extraction unit is the same color as the background color so that the difference from the value representing the background color is larger than the threshold. Characterized by changing,
The information processing apparatus according to claim 1. The apparatus further comprises adjacency determining means for determining whether or not the component having the same color as the background color is adjacent to the background.
The extraction means extracts the other constituent member when the constituent member of the same color as the background color is adjacent to the background.
The information processing apparatus according to claim 1 or 2. The adjacency determining means determines whether or not the constituent member adjacent to the background is based on whether or not the constituent member having the same color as the background color shares the union with the union of the plurality of constituent members. It is characterized by judging,
The information processing apparatus according to claim 3. In the color space, the extracting means extracts two or more other colors arranged in a straight line through the color values of components similar to the background color, and two or more configurations in which these colors are set Extracting a member,
The information processing apparatus according to any one of claims 1 to 4. In the RGB color space or a color space represented by hue, lightness, and saturation, the extracting means includes two or more other colors arranged in a straight line through the color values of the constituent members similar to the background color. Characterized by extracting,
The information processing apparatus according to claim 5. In the color space, the color changing unit is configured to set a color value set for the constituent member having the same color as the background color and the constituent member extracted by the extracting unit in the color space, while maintaining the straight line. It is characterized in that it is changed to a value rotated in a predetermined direction at the center,
The information processing apparatus according to claim 5 or 6. The extraction unit extracts two or more components in which a color having a difference from the value representing the background color is set in a color space.
The information processing apparatus according to any one of claims 1 to 4. The color changing unit is configured to change the color set for the constituent member having the same color as the background color and the color set for the constituent member extracted by the extracting unit such that a difference from the value of the background color becomes large. And
The information processing apparatus according to claim 8. The color changing unit is configured to change the color of the structural member similar to the background color and the color of the structural member extracted by the extracting unit by multiplying by a predetermined scale value.
The information processing apparatus according to claim 1. The color changing unit changes the color of the component to the same color in the plurality of characters when the component determined to be in the predetermined relationship is set to the same color with a plurality of characters. It is characterized by
The information processing apparatus according to claim 1. A method executed by an information processing apparatus that displays an image representing the character composed of a plurality of components on a display in response to an instruction to draw a character,
Determining whether the plurality of constituent members include constituent members of a similar color to the background color of the background on which the characters are drawn; and
When it is determined that the constituent members having the same color as the background color are included in the plurality of constituent members, the other constituent members in which a color having a predetermined relationship with the color of the constituent members is set Extracting from the component;
The step of changing the color of the constituent member similar to the background color among the plurality of constituent members and the color of the extracted constituent member while maintaining the predetermined relationship;
Forming the image by drawing each component on the background using the changed color of the component, and
How to display the image. In response to an instruction to draw a character, a computer that displays an image representing the character composed of a plurality of components on a display,
A color difference for determining whether a plurality of constituent members constituting an image representing the character include a constituent member having a color similar to the background color of the background on which the character is drawn in response to an instruction to draw the character Determination means,
When it is determined that the constituent members having the same color as the background color are included in the plurality of constituent members, the other constituent members in which a color having a predetermined relationship with the color of the constituent members is set Extraction means for extracting from the components;
A color changing unit that changes the color of the constituent member that is similar to the background color among the plurality of constituent members, and the color of the constituent member that is extracted by the extracting unit, while maintaining the predetermined relationship;
Drawing means for forming the image by drawing each component on the background using the changed color of the component;
Computer program to function as.   A computer-readable storage medium storing the computer program according to claim 13.

Images