SYSTEM AND METHOD FOR CREATING A VIDEO FRAME FROM A SINGLE VIDEO FIELD

• US 20150229879A1
• Filed: 02/13/2014
• Published: 08/13/2015
• Est. Priority Date: 02/13/2014
• Status: Active Grant

• Current Assignee: NVIDIA Corporation
• Original Assignee: NVIDIA Corporation
• Inventors: Vojkovich, Mark
• Granted Patent: US 9,549,147 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229
• CPC Class Codes: H04N 7/0135 involving interpolation processes interpolation-based image scaling G06T3/4007; interpolation for video coding H04N19/587, H04N19/59

Abstract

A system and method of producing a frame of a video image from an interlaced field. In one embodiment, the method includes: (1) creating an equal-intensity trace from present samples in the field, (2) recognizing an equal-intensity path in the equal-intensity trace, (3) at least partially straightening the equal-intensity path and (4) using the equal-intensity path to determine an intensity value for a missing sample in the frame.

Claims

1. An integrated circuit operable to produce a frame from a field by:

creating an equal-intensity trace from present samples in said field;

recognizing an equal-intensity path in said equal-intensity trace;

at least partially straightening said equal-intensity path; and

using said equal-intensity path to determine an intensity value for a missing sample in said frame.

2. The integrated circuit as recited in claim 1, wherein said using comprises interpolating between closest ones of present samples and said equal-intensity path to said missing sample.

3. The integrated circuit as recited in claim 1, wherein said recognizing is carried out based on a likelihood of reflecting true image features.

4. The integrated circuit as recited in claim 1, wherein said recognizing comprises selecting said equal-intensity path based on a direction of an extending trace of said equal-intensity path.

5. The integrated circuit as recited in claim 1, wherein said recognizing comprises selecting said equal-intensity trace based on a compatibility of intensity profiles at beginning point and end points of said equal-intensity path.

6. The integrated circuit as recited in claim 1, wherein said recognizing comprises bridging said equal-intensity path with another equal-intensity path in another equal-intensity trace.

7. The integrated circuit as recited in claim 1, wherein said creating comprises:

linearly interpolating between present samples to locate equal-intensity points;

drawing equal-intensity lines between said equal-intensity points; and

connecting said equal-intensity lines.

8. The integrated circuit as recited in claim 1, wherein said at least partially straightening is carried out based on likelihood of reflecting true image features.

9. The integrated circuit as recited in claim 1, wherein said at least partially straightening comprises clipping said equal-intensity path using maximally straightened extending traces of said equal-intensity path.

10. The integrated circuit as recited in claim 1, wherein said at least partially straightening comprises straightening based on a roughness of said equal-intensity path.

11. The integrated circuit as recited in claim 1, wherein said at least partially straightening comprises straightening based on a direction of an extending trace of said equal-intensity path.

12. The method as recited in claim 11, wherein said using comprises interpolating between closest ones of present samples and said equal-intensity path to said missing sample.

13. The method as recited in claim 11, wherein said recognizing is carried out based on a likelihood of reflecting true image features.

14. The method as recited in claim 11, wherein said recognizing comprises selecting said equal-intensity path based on a direction of an extending trace of said equal-intensity path.

15. The method as recited in claim 11, wherein said recognizing comprises selecting said equal-intensity trace based on a compatibility of intensity profiles at beginning point and end points of said equal-intensity path.

16. The method as recited in claim 11, wherein said equal-intensity paths are recognized by bridging paths in equal-intensity traces.

17. The method as recited in claim 11, wherein said at least partially straightening is carried out based on likelihood of reflecting true image features.

18. The method as recited in claim 11, wherein said at least partially straightening comprises clipping said equal-intensity path using maximally straightened extending traces of said equal-intensity path.

19. The method as recited in claim 11, wherein said at least partially straightening comprises straightening based on a roughness of said equal-intensity path.

20. The method as recited in claim 11, wherein said at least partially straightening comprises straightening based on a direction of an extending trace of said equal-intensity path.

11-1. A method of producing a frame from a field, comprising:

recognizing equal-intensity paths in equal-intensity traces generated from present samples in said field;

at least partially straightening said equal-intensity paths; and

using said equal-intensity paths to determine an intensity value for a missing sample.