Two-dimensional digital transient improvement

• US 9,269,129 B1
• Filed: 12/13/2013
• Issued: 02/23/2016
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: Pixelworks Incorporated
• Original Assignee: Pixelworks Incorporated
• Inventors: Woodall, Neil
• Primary Examiner(s): Bayat, Ali
• Application Number:
  US14/106,366
• Time in Patent Office: 802 Days
• Field of Search: 382/266
• US Class Current: 1/1
• CPC Class Codes: G06T 2207/20192 Edge enhancement; Edge preservation
• CPC Class Codes: G06T 5/20 using local operators
• CPC Class Codes: G06T 5/73 Deblurring; Sharpening

Abstract

A method can include receiving an input signal that includes an input image having an original edge, applying multiple one-dimensional (1D) Digital Transient Improvement (DTi) algorithms to the input image, summing each result of the application of each of the 1D DTi algorithms to the input image, and providing an output signal that includes an output image having an enhanced edge that results from the applying and summing and corresponds to the original edge.

Claims

1. A method, comprising:

receiving an input signal that includes an input image having an original edge therein;

applying a plurality of one-dimensional (1D) Digital Transient Improvement (DTi) algorithms to the input image, wherein the plurality of 1D DTi algorithms includes a horizontal DTi algorithm and a vertical DTi algorithm;

determining a delta value corresponding to the horizontal DTi algorithm;

determining a delta value corresponding to the vertical DTi algorithm;

summing each result of the application of each of the plurality of 1D DTi algorithms to the input image, wherein the summing includes performing a first adjustment based on the delta value corresponding to the horizontal DTi algorithm and the delta value corresponding to the vertical DTi algorithm; and

providing an output signal that includes an output image having an enhanced edge that results from the applying and summing and corresponds to the original edge.

2. The method of claim 1, wherein the plurality of 1D DTi algorithms further includes a DTi algorithm at 45 degrees and a DTi algorithm at 135 degrees.

3. The method of claim 2, further comprising:

determining a delta value corresponding to the DTi algorithm at 45 degrees; and

determining a delta value corresponding to the DTi algorithm at 135 degrees.

4. The method of claim 3, wherein the summing further includes performing a second adjustment based on the delta value corresponding to the DTi algorithm at 45 degrees and the delta value corresponding to the DTi algorithm at 135 degrees.

5. The method of claim 4, wherein the summing further includes summing an output of the first adjustment and an output of the second adjustment.

6. The method of claim 5, wherein the summing further includes summing the input image with the output of the first adjustment and the output of the second adjustment.

7. One or more tangible, non-transitory computer-readable media storing computer-executable instructions that, when executed by a processor, perform the method recited by claim 1.

8. A method, comprising:

receiving an input signal that includes an input image having an original edge therein;

applying a plurality of one-dimensional (1D) Digital Transient Improvement (DTi) algorithms to the input image;

summing each result of the application of each of the plurality of 1D DTi algorithms to the input image;

providing an output signal that includes an output image having an enhanced edge that results from the applying and summing and corresponds to the original edge; and

applying a two-dimensional (2D) peaking algorithm to the input signal and combining the result with the DTi result.

9. The method of claim 8, wherein the combining comprises reducing the 2D peaking amount by a percentage of the DTi amount.

10. The method of claim 8, wherein the combining comprises using the output with the largest magnitude if both outputs are in the same direction.

11. The method of claim 8, wherein the combining comprises adding both outputs if they are not in the same direction.

12. One or more tangible, non-transitory computer-readable media storing computer-executable instructions that, when executed by a processor, perform the method recited by claim 8.

13. A system comprising:

a display configured to visually present an original image having an edge therein; and

a processor configured to;

perform a horizontal Digital Transient Improvement (DTi) algorithm on the original image;

perform a vertical DTi algorithm on the original image;

perform a DTi algorithm at 45 degrees on the original image;

perform a DTi algorithm at 135 degrees on the original image;

sum results of the horizontal DTi algorithm, the vertical DTi algorithm, the DTi algorithm at 45 degrees, and the DTi algorithm at 135 degrees;

perform a first adjustment based on a delta value corresponding to an output of the horizontal DTi algorithm and a delta value corresponding to an output of the vertical DTi algorithm; and

perform a second adjustment based on a delta value corresponding to an output of the DTi algorithm at 45 degrees and a delta value corresponding to an output of the DTi algorithm at 135 degrees.

14. The system of claim 13, wherein the processor is configured to sum the results of the horizontal DTi algorithm, the vertical DTi algorithm, the DTi algorithm at 45 degrees, and the DTi algorithm at 135 degrees by summing results of the first adjustment and the second adjustment.

15. The system of claim 14, wherein the processor is further configured to sum an output of the horizontal DTi algorithm with the original image.

16. The system of claim 13, wherein the processor is further configured to apply a two-dimensional (2D) peaking algorithm to the original image and combine the result with the DTi result.

17. The system of claim 16, wherein the processor is further configured to reduce the 2D peaking amount by a percentage of the DTi result.

18. The system of claim 17, wherein the processor is further configured to use the output with the largest magnitude if both outputs are in the same direction.

19. The system of claim 17, wherein the processor is further configured to add both outputs if they are not in the same direction.