Image processing

• US 7,679,779 B2
• Filed: 06/23/2005
• Issued: 03/16/2010
• Est. Priority Date: 06/24/2004
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Pollard, Stephen B., Hunter, Andrew Arthur
• Primary Examiner(s): NGUYEN, ANH-VINH THI
• Application Number:
  US11/165,256
• Publication Number:
  US 20050286763A1
• Time in Patent Office: 1,727 Days
• Field of Search: 358/1.9, 358/515, 358/518, 358/523, 358/530, 358/532, 358/537, 358/3.27, 358/1.13, 382/167, 382/164, 382266-269
• US Class Current: 358/1.9
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: H04N 1/58 Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction H04N1/62 takes precedence

Abstract

A method of digitally processing data for use in representing an image, comprising scaling edge data relating to edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, and a device operable in accordance with the method.

Claims

1. A method of digitally processing data for use in representing an image, comprising:

scaling strength of a plurality of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.

2. A method as claimed in claim 1, wherein the unadjusted data relates to higher spatial frequency content of the colour-unadjusted component of the image.

3. A method as claimed in claim 1, wherein the unadjusted data relates to a first colour space, and said strength of the plurality of edges relates to a second colour space, wherein the first and second colour spaces each comprise any one of the RGB, sRGB or MYC colour spaces.

4. The method of claim 1, wherein the scaling is based on a ratio between the strength of the plurality of edges for the at least one color-adjusted component and the unuadjusted data corresponding to the color-unadjusted component.

5. The method of claim 4, wherein the scaling involves a scale factor, the scale factor comprising the unadjusted data.

6. The method of claim 4, wherein the scaling comprises applying a ceiling to the ratio and scaling the ceiling by the unadjusted data.

7. The method of claim 1, wherein the scaling is performed across the whole extent of the image.

8. The method of claim 1, wherein the strength of the edge is relative with respect to strength in a spatially-corresponding edge of the colour-unadjusted component of the image.

9. An image processing device operable to process data for use in representing an image, the device being further operable to:

scaling strength of a plurality of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.

10. A device as claimed in claim 9, further comprising an image capture element operable to generate data representing the image in a first colour space.

11. A device as claimed in claim 10, wherein the first colour space is a MYC colour space, and the at least one colour adjusted image component is RGB colour space or sRGB colour space.

12. An image processing device operable to scale strength of a pluralitv of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.

13. The image processing device of claim 12, wherein the scaling is performed across the whole extent of the image.

14. The image processing device of claim 12, wherein the strength of the edge is relative with respect to strength in a spatially-corresponding edge of the colour-unadjusted component of the image.

15. A computer program product comprising a computer readable medium having thereon computer program instructions, such that, when said program is loaded in a memory of the computer, said instructions cause the computer to process image data to scale strength of a plurality of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.

16. The program of claim 15, wherein the scaling is performed across the whole extent of the image.

17. The program of claim 15, wherein the strength of the edge is relative with respect to strength in a spatially-corresponding edge of the colour-unadjusted component of the image.

18. A program stored on computer-readable medium, the program comprising instructions executable by a computer so as to cause the computer to process image data to scale strength of a plurality of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.

19. A logic circuit configured to operate to scale strength of a plurality of edges in at least one colour-adjusted component of the image using unadjusted data relating to a colour-unadjusted component of the image, wherein the strength of each of the plurality of edges to be scaled is related to a gradient of the image.