Image processing device, image forming device, image processing method, image processing program, and recording medium containing the image processing program recorded thereon

• US 7,460,268 B2
• Filed: 06/13/2003
• Issued: 12/02/2008
• Est. Priority Date: 06/14/2002
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Minami, Masanori, Goto, Makio
• Primary Examiner(s): Coles; Edward L
• Assistant Examiner(s): Baker; Charlotte M
• Application Number:
  US10/461,070
• Publication Number:
  US 20040001228A1
• Time in Patent Office: 1,999 Days
• Field of Search: 358/1.9, 358/406, 358504-505, 358/523, 358/518, 358519-520, 358/515, 358534-535, 358/448, 358/453, 358/296, 358/302, 358/3.1, 358/3.16, 358/3.01, 358/3.06, 358/3.13, 358/3.17, 358/3.19, 358/536, 358/521, 358/538, 358/2.1, 358/3.23, 382274-275, 382/162, 382/167, 382/286, 382/319, 355/38, 347/232, 347/251, 399/45
• US Class Current: 358/1.9
• CPC Class Codes: H04N 1/6016 Conversion to subtractive colour signals

Abstract

The present invention provides an image processing device which can reduce a storage capacity and perform color correction in accordance with the types of image. The image processing device of the present invention has an input correction section 6 including: input color correction section 24 for, using a matrix coefficient, correcting strength of signals for color components in image data of a supplied image; a matrix coefficient storage section 26 for storing a plurality of matrix coefficients in accordance with types of image; and control section 25 for reading a matrix coefficient corresponding to the type of a supplied image out of the matrix coefficients stored in the matrix coefficient storage section 26 and setting the matrix coefficient that has been read in the input color correction section 24.

Claims

1. An image processing device comprising:

input color correcting means, using a matrix coefficient, for performing input color correction for correcting strength of signals for color components in image data of a first color system supplied from a supplied image of an original;

matrix coefficient storing means for storing a plurality of matrix coefficients in accordance with different types of images, wherein the different types of images includes at least any one of text, screen dots, and photograph; and

control means for reading a matrix coefficient corresponding to at least one image type out of the matrix coefficients stored in the matrix coefficient storing means, the at least one image type corresponding to the supplied image, and setting the matrix coefficient that has been read in the input color correcting means.

2. The image processing device according to claim 1, wherein the control means set a matrix coefficient in the input color correction means in accordance with types of color material from which the supplied image is made.

3. The image processing device according to claim 1, further comprising:

color converting means for, using a look-up table, converting first image data into second image data, the first image data being of a first color system composed of the color components, the second image data being of second color system for providing an image on a recording material.

4. An image forming device comprising:

an image processing device including;

input color correcting means, using a matrix coefficient, for performing input color correction for correcting strength of signals for color components in image data of a first color system from a supplied image of an original;

matrix coefficient storing means for storing a plurality of matrix coefficients in accordance with different types of images, wherein the different types of images includes at least any one of text, screen dots, and photograph; and

control means for reading a matrix coefficient corresponding to at least one image type out of the matrix coefficients stored in the matrix coefficient storing means, the at least one image type corresponding to the supplied image, and setting the matrix coefficient that has been read in the input color correcting means, and

an image input device which scans an image from an original and supplies an image that has been scanned to the image processing device.

5. The image forming device according to claim 4, wherein the image processing device further includes color converting means for, using a look-up table, converting first image data into second image data, the first image data being of a first color system composed of the color components, the second image data being of second color system for providing an image on a recording material.

6. The image forming device according to claim 4, wherein the control means set a matrix coefficient in the input color correction means in accordance with types of color material from which the supplied image is made.

7. A computer-readable recording medium for storing an image processing program that causes a computer to execute an image processing method comprising the steps of:

selecting a matrix coefficient corresponding to a type of an supplied image from among a plurality of matrix coefficients, each of the plurality of matrix coefficients corresponding to a different type of image and wherein the different type of image includes at least any one of text, screen dots, and photograph; and

using the matrix coefficient that has been selected, performing input color correction for correcting strength of signals for color components in image data of a first color system from the supplied image of an original.

8. The recording medium according to claim 7 wherein the image processing method further includes the step of:

performing color conversion for, using a look-up table, converting first image data into second image data, the first image data being of a first color system composed of the color components and being obtained by the input color correction, the second image data being of second color system for providing an image on a recording material.

9. The recording medium according to claim 7, wherein in the image processing method, the matrix coefficient is selected in accordance with types of color material from which the supplied image is made.

10. An image processing method comprising the steps of:

selecting a matrix coefficient corresponding to a type of a supplied image from among a plurality of matrix coefficients, each of the plurality of matrix coefficients corresponding to a different type of image and wherein the different type of image includes at least any one of text, screen dots, and photograph; and

using the matrix coefficient that has been selected, performing input color correction for correcting strength of signals for color components in image data of a first color system from the supplied image of an original.

11. The image processing method according to claim 10, further comprising the step of:

performing color conversion for, using a look-up table, converting first image data into second image data, the first image data being of a first color system composed of the color components and being obtained by the input color correction, the second image data being of second color system for providing an image on a recording material.

12. The image processing method according to claim 10, wherein the matrix coefficient is selected in accordance with types of color material from which the supplied image is made.

13. An image processing program in combination with a computer having a processor on which the image processing program is executed, the image processing program that causes a computer to execute an image processing method comprising the steps of:

selecting a matrix coefficient corresponding to a type of a supplied image from among a plurality of matrix coefficients, each of the plurality of matrix coefficients corresponding to a different type of image and wherein the different type of image includes at least any one of text, screen dots, and photograph; and

using the matrix coefficient that has been selected, performing input color correction for correcting strength of signals for color components in image data of a first color system from the supplied image of an original.

14. The image processing program according to claim 13, wherein in the image processing method, the matrix coefficient is selected in accordance with types of color material from which the supplied image is made.

15. The image processing program according to claim 13, wherein the image processing method further includes the step of:

performing color conversion for, using a look-up table, converting first image data into second image data, the first image data being of a first color system composed of the color components and being obtained by the input color correction, the second image data being of second color system for providing an image on a recording material.