Enhancing video sharpness and contrast by luminance and chrominance transient improvement

• US 8,031,956 B2
• Filed: 01/18/2010
• Issued: 10/04/2011
• Est. Priority Date: 06/20/2005
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Ali, Walid S.
• Primary Examiner(s): COUSO, JOSE L
• Application Number:
  US12/688,955
• Publication Number:
  US 20100177249A1
• Time in Patent Office: 624 Days
• Field of Search: 382232-233, 382/240, 382/248, 382/254, 382/266, 348/384.1, 348/395.1, 3484031-4051, 348/408.1, 375/240.11, 375/240.19, 708/317, 708400-401
• US Class Current: 382/240
• CPC Class Codes: G06T 2207/20016 Hierarchical, coarse-to-fine, multiscale or multiresolution image processing; Pyramid transform
• CPC Class Codes: G06T 2207/20064 Wavelet transform [DWT]
• CPC Class Codes: G06T 2207/20192 Edge enhancement; Edge preservation
• CPC Class Codes: G06T 5/10 using non-spatial domain filtering
• CPC Class Codes: G06T 5/73 Deblurring; Sharpening
• CPC Class Codes: H04N 5/142 Edging; Contouring

Abstract

An apparatus, system, method, and article for enhancing video sharpness are described. The apparatus may include a media processing node to enhance sharpness of an input image. The media processing node may include a wavelet decomposition module to perform wavelet decomposition of the input image to detect and modify edge information. Other embodiments are described and claimed.

Claims

1. An apparatus, comprising:

a processor; and

a media processing node arranged to enhance sharpness of an input image using said processor, said media processing node comprising;

a receiver to receive the input image;

a wavelet decomposition module to perform multiple levels of wavelet decomposition of said input image by performing wavelet analysis for edge detection using a wavelet transform, said wavelet analysis comprising a windowing technique with variable-sized time regions; and

an edge enhancement module to perform horizontal, vertical, and diagonal enhancement on high frequency components of wavelet decomposition output from said wavelet decomposition module.

2. The apparatus of claim 1, wherein the input image comprises time aspects and scale aspects.

3. The apparatus of claim 2, wherein said windowing technique comprises longer time intervals for low-frequency information and shorter time intervals for high-frequency information.

4. The apparatus of claim 1, wherein the wavelet transform comprises a dyadic wavelet transform.

5. The apparatus of claim 1, wherein the wavelet transform is applied recursively for the multiple levels of wavelet decomposition.

6. The apparatus of claim 1, wherein said edge enhancement module performs the enhancement based on a relative amount of energy in each level of decomposition.

7. The apparatus of claim 6, wherein said edge enhancement module enhances said high frequency components by boosting said high frequency components according to boosting factors based on the relative amount of energy in each level of decomposition.

8. A system, comprising:

a source node;

a processor; and

a media processing node to couple to said source node and arranged to enhance sharpness of an input image using said processor, said media processing node comprising;

a receiver to receive an input image;

a wavelet decomposition module to perform multiple levels of wavelet decomposition of said input image, by performing wavelet analysis for edge detection using a wavelet transform, said wavelet analysis comprising a windowing technique with variable-sized time regions; and

an edge enhancement module to perform horizontal, vertical, and diagonal enhancement on high frequency components of wavelet decomposition output from said wavelet decomposition module.

9. The system of claim 8, wherein the input image comprises time aspects and scale aspects.

10. The system of claim 9, wherein said windowing technique comprises longer time intervals for low-frequency information and shorter time intervals for high-frequency information.

11. The system of claim 8, wherein the wavelet transform comprises a dyadic wavelet transform.

12. The system of claim 8, wherein the wavelet transform is applied recursively for the multiple levels of wavelet decomposition.

13. The system of claim 8, wherein said edge enhancement module performs the enhancement based on a relative amount of energy in each level of decomposition.

14. The system of claim 13, wherein said edge enhancement module enhances said high frequency components by boosting said high frequency components according to boosting factors based on the relative amount of energy in each level of decomposition.

15. A method, comprising:

receiving an input image in a computer comprising a processor;

performing multiple levels of wavelet decomposition of said input image with said processor by performing wavelet analysis for edge detection using a wavelet transform, said wavelet analysis comprising a windowing technique with variable-sized time regions; and

performing horizontal, vertical, and diagonal enhancement on high frequency components of wavelet decomposition output from said wavelet decomposition module.

16. The method of claim 15, wherein the input image comprises time aspects and scale aspects.

17. The method of claim 16, wherein said windowing technique comprises longer time intervals for low-frequency information and shorter time intervals for high-frequency information.

18. The method of claim 15, wherein the wavelet transform comprises a dyadic wavelet transform.

19. The method of claim 15, wherein the wavelet transform is applied recursively for the multiple levels of wavelet decomposition.

20. The method of claim 15, wherein said edge enhancement module performs the enhancement based on a relative amount of energy in each level of decomposition.

21. The method of claim 20, wherein said edge enhancement module enhances said high frequency components by boosting said high frequency components according to boosting factors based on the relative amount of energy in each level of decomposition.

22. An article comprising a computer-readable storage medium containing instructions that when executed enable a computer to:

receive an input image;

perform multiple levels of wavelet decomposition of said input image by performing wavelet analysis for edge detection using a wavelet transform, said wavelet analysis comprising a windowing technique with variable-sized time regions; and

performing horizontal, vertical, and diagonal enhancement on high frequency components of wavelet decomposition output from said wavelet decomposition module.

23. The article of claim 22, wherein the input image comprises time aspects and scale aspects.

24. The article of claim 23, wherein said windowing technique comprises longer time intervals for low-frequency information and shorter time intervals for high-frequency information.

25. The article of claim 22, wherein the wavelet transform is applied recursively for the multiple levels of wavelet decomposition.