초록 ▼

An image processing apparatus includes a character-area extracting unit that extracts a character area in which characters are displayed from image data including characters, a character-color converting unit that converts the color of characters in the character area extracted by the character-area

An image processing apparatus includes a character-area extracting unit that extracts a character area in which characters are displayed from image data including characters, a character-color converting unit that converts the color of characters in the character area extracted by the character-area extracting unit to a predetermined prescribed character color, and a background-color converting unit that converts a background color of the background, which is an area other than the characters in the character area extracted by the character-area extracting unit to a predetermined prescribed background color.

대표청구항 ▼

What is claimed is: 1. An image processing apparatus comprising: a character-area extracting unit to extract a character area from an image; a character-area specifying unit to specify a character color of a character included in the extracted character area; a highlighted-character extracting unit

What is claimed is: 1. An image processing apparatus comprising: a character-area extracting unit to extract a character area from an image; a character-area specifying unit to specify a character color of a character included in the extracted character area; a highlighted-character extracting unit to extract a highlighted character from the character included in the extracted character area based on the specified character color; a highlight processor to change a display mode of the extracted highlighted character; an area dividing unit to divide the extracted character area into a plurality of column areas; a color holding unit to hold a plurality of first colors and a plurality of second colors in association with each other; a character-color converting unit to convert the specified character color of the extracted highlighted character of a colunm area in the plurality of column areas to a first color of the plurality of first colors obtained from the color holding unit; and a background-color converting unit to convert a background color of a background of the column area of the image to a second color of the plurality of second colors, wherein the second color is identified by the color holding unit as associated with the first color. 2. The image processing apparatus according to claim 1, wherein the highlight processor changes a font of the highlighted character. 3. The image processing apparatus according to claim 1, further comprising a line-direction determining unit to determine a direction of a character line included in the extracted character area, wherein when the line-direction determining unit determines that the line direction is same as a direction in which the extracted character is aligned in the character area, the highlight processor adds a mark in the image any one of above and below the extracted character. 4. The image processing apparatus according to claim 1, further comprising a line-direction determining unit to determine a direction of a character line included in the extracted character area, wherein when the line-direction determining unit determines that the line direction is orthogonal to a direction in which the extracted character is aligned in the character area, the highlight processor adds a mark in the image any one of right and left of the extracted character. 5. The image processing apparatus according to claim 1, further comprising a line-direction determining unit to determine a direction of a character line included in the extracted character area, wherein the highlight processor adds a highlight line as a mark indicating that these are the highlighted characters to a position determined based on the line direction determined by the line-direction determining unit. 6. The image processing apparatus according to claim 1, further comprising a line-direction determining unit to determine a direction of a character line included in the extracted character area, wherein the highlight processor adds dots as a mark indicating that these are the highlighted characters to a position determined based on the line direction determined by the line-direction determining unit. 7. The image processing apparatus according to claim 1, further comprising: a line-direction determining unit to determine a direction of a character line included in the extracted character area; and a highlight start-and-finish position specifying unit to specify a start position and a finish position of the highlighted character in the line direction determined by the line-direction determining unit, wherein the highlight processor adds a start mark at the start position and a finish mark at the finish position of the highlighted character. 8. The image processing apparatus according to claim 7, wherein the highlight processor adds a bracket as the start mark and the finish mark. 9. The image processing apparatus according to claim 1, wherein the background-color converting unit converts a background color of each of the column area to each of a plurality of different second colors. 10. The image processing apparatus according to claim 9, further comprising a color designation receiving unit to receive input of a second color for each of a column area, wherein the background-color converting unit converts the background color of a column area to a second color of which designation is received by the color designation receiving unit. 11. The image processing apparatus according to claim 1, wherein the character-color converting unit converts a character color of each column area to each of a plurality of different first colors. 12. The image processing apparatus according to claim 11, wherein the character-color converting unit converts the color of the characters in each column area to the first color held by the color holding unit. 13. The image processing apparatus according to claim 12, further comprising a color designation receiving unit to receive input of a first color for each colunm area, wherein the character-color converting unit converts the color of the characters in the column area to a first color of which designation is received by the color designation receiving unit. 14. The image processing apparatus according to claim 1, further comprising a converted color holding unit to hold a first color and a third color with respect to the first color in association with each other, wherein the character-color converting unit converts the color of the extracted highlighted character to the third color. 15. The image processing apparatus according to claim 1, further comprising a converted color holding unit to hold a first color and a third color with respect to the first color in association with each other, wherein the background-color converting unit converts the background color to the third color. 16. The image processing apparatus according to claim 1, further comprising a background processor to apply background processing to the background, wherein the background-color converting unit converts the background color of the background area having been subjected to the background processing by the background processor to the second color. 17. The image processing apparatus according to claim 1, further comprising a high resolution processor to apply high resolution processing to the character in the extracted character area, wherein the character-color converting unit converts the color of the character having been subjected to the high resolution processing by the high resolution processor to the first color. 18. An image processing method comprising: extracting a character area from an image; specifying a character color of a character included in the extracted character area; extracting a highiighted character from the character included in the extracted character area based on the specified character color; changing a display mode of the extracted highlighted character; dividing the extracted character area into a plurality of column areas; associating a plurality of first colors and a plurality of second colors with each other in a storage unit; converting the specified character color of the extracted highlighted character of a column area in the plurality of column areas to a first color of the plurality of first colors; and converting a background color of a background of the column area of the image to a second color of the plurality of second colors, wherein the second color is identified by the storage unit as associated with the first color. 19. A computer-readable recording medium that stores therein a computer program that causes a computer to perform a method comprising: extracting a character area from an image; specifying a character color of a character included in the extracted character area; extracting a highlighted character from the character included in the extracted character area based on the specified character color; changing a display mode of the extracted highlighted character; dividing the extracted character area into a plurality of colunm areas; associating a plurality of first colors and a plurality of second colors with each other in the computer; converting the specified character color of the extracted highlighted character of a column area in the plurality of column areas to a first color of the plurality of first colors; and converting a background color of a background of the column area of the image to a second color of the plurality of second colors, wherein the second color is identified by the computer as associated with the first color.