Enhancing video sharpness and contrast by luminance and chrominance transient improvement

• US 7,676,103 B2
• Filed: 06/20/2005
• Issued: 03/09/2010
• 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:
  US11/157,335
• Publication Number:
  US 20060285767A1
• Time in Patent Office: 1,723 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;

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 wavelet decomposition of said input image to detect and modify edge information, wherein said wavelet decomposition module is to perform multiple levels of decomposition, with each level of decomposition having a detail component and an approximation component; and

an edge enhancement module to receive said detail component as wavelet decomposition output from said wavelet decomposition module, and perform horizontal, vertical and diagonal enhancement on said detail component.

2. The apparatus of claim 1, wherein said input image comprises a picture in a video sequence comprising signals sampled in a horizontal direction and in a vertical direction.

3. The apparatus of claim 1, wherein said wavelet decomposition comprises two-dimensional orthogonal wavelet decomposition.

4. The apparatus of claim 1, wherein said edge enhancement module is to enhance high frequency components of said wavelet decomposition output.

5. The apparatus of claim 1, further comprising a reconstruction module to perform image reconstruction using wavelet decomposition output from said wavelet decomposition module.

6. A system, comprising:

a source node;

a processor;

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 wavelet decomposition of said input image to detect and modify edge information, wherein said wavelet decomposition module is to perform multiple levels of decomposition, with each level of decomposition having a detail component and an approximation component; and

an edge enhancement module to receive said detail component as wavelet decomposition output from said wavelet decomposition module, and perform horizontal, vertical and diagonal enhancement on said detail component.

7. The system of claim 6, wherein said input image comprises a picture in a video sequence comprising signals sampled in a horizontal direction and in a vertical direction.

8. The system of claim 6, wherein said wavelet decomposition comprises two dimensional orthogonal wavelet decomposition.

9. The system of claim 6, wherein said edge enhancement module is to enhance high frequency components of said wavelet decomposition output.

10. The system of claim 6, further comprising a reconstruction module to perform image reconstruction using wavelet decomposition output from said wavelet decomposition module.

11. A method, comprising:

receiving an input image in a computer comprising a processor;

performing multiple levels of wavelet decomposition of said input image to detect and modify edge information with said processor, with each level of decomposition having a detail component and an approximation component;

receiving said detail component as wavelet decomposition output; and

performing horizontal, vertical and diagonal enhancement on said detail component of said wavelet decomposition output with said processor.

12. The method of claim 11, wherein said input image comprises a picture in a video sequence comprising signals sampled in a horizontal direction and in a vertical direction.

13. The method claim 11, further comprising performing two-dimensional orthogonal wavelet decomposition.

14. The method of claim 11, further comprising enhancing high frequency components of said wavelet decomposition output.

15. The method of claim 11, further comprising performing image reconstruction using wavelet decomposition output.

16. 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 to detect and modify edge information, with each level of decomposition having a detail component and an approximation component;

receive said detail component as wavelet decomposition output; and

perform horizontal, vertical and diagonal enhancement on said detail component of said wavelet decomposition output.

17. The article of claim 16, wherein said input image comprises a picture in a video sequence comprising signals sampled in a horizontal direction and in a vertical direction.

18. The article of claim 16, further comprising instructions that when executed enable the computer to perform two-dimensional orthogonal wavelet decomposition.