Method for handling static text and logos in stabilized images

• US 8,457,443 B2
• Filed: 12/22/2011
• Issued: 06/04/2013
• Est. Priority Date: 02/26/2008
• Status: Active Grant

• Current Assignee: Cyberlink Corporation
• Original Assignee: Cyberlink Corporation
• Inventors: Kuo, Chia-Chen
• Primary Examiner(s): Patel, Jayesh A
• Application Number:
  US13/334,072
• Publication Number:
  US 20120093413A1
• Time in Patent Office: 530 Days
• Field of Search: 382173-179, 382/294, 348/208.99
• US Class Current: 382/294
• CPC Class Codes: H04N 21/44008 involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/4882 for displaying messages, e.g. warnings, reminders arrangements for providing short real-time information to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 5/44504 Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits

Abstract

To handle static text and logos in stabilized images without destabilizing the static text and logos, a method of handling overlay subpictures in stabilized images includes separating an existing overlay subpicture from an input image to generate a separated overlay subpicture and a separated input image. The separated input image is stabilized to form a stabilized image. The separated overlay subpicture is then merged with the stabilized image to obtain an output image.

Claims

1. A method of handling overlay subpictures in stabilized images, the method comprising:

separating an existing overlay subpicture from an input image to generate a separated overlay subpicture and a separated input image;

stabilizing the separated input image to form a stabilized image; and

merging the separated overlay subpicture with the stabilized image to obtain an output image, wherein merging the separated overlay subpicture with the stabilized image to obtain the output image comprises;

processing a region of the stabilized image the separated overlay subpicture will be located in; and

setting the separated overlay subpicture on the region of the stabilized image.

2. The method of claim 1, further comprising:

utilizing the input image and a plurality of images to determine a static region of the input image corresponding to the existing overlay subpicture.

3. The method of claim 2, wherein determining the static region is determining a region with matching size common to the input image and the plurality of images.

4. The method of claim 2, wherein determining the static region is determining a region with matching shape common to the input image and the plurality of images.

5. The method of claim 2, wherein determining the static region is determining a region with matching position common to the input image and the plurality of images.

6. The method of claim 2, wherein determining the static region of the input image corresponding to the existing overlay subpicture comprises:

utilizing the input image and the plurality of images to calculate a motion vector matching a predetermined criterion.

7. The method of claim 2, wherein determining the static region of the input image corresponding to the existing overlay subpicture comprises:

utilizing the input image and the plurality of images to calculate a luminance variation matching a predetermined criterion.

8. The method of claim 2, wherein determining the static region of the input image corresponding to the existing overlay subpicture comprises:

utilizing the input image and the plurality of images to calculate a chrominance variation matching a predetermined criterion.

9. The method of claim 1, wherein processing the region the separated overlay subpicture will be located in comprises:

replacing the region with image data from a second region of the stabilized image.

10. The method of claim 1, wherein processing the region the separated overlay subpicture will be located in comprises:

replacing the region with image data from a second region of at least one image of a plurality of images.

11. The method of claim 1, wherein merging the separated overlay subpicture with the stabilized image to obtain the output image further comprises:

smoothing a border region of the separated overlay subpicture and the stabilized image.

12. The method of claim 1, further comprising:

detecting the existing overlay subpicture in the input image.

13. The method of claim 12, wherein detecting the existing overlay subpicture comprises detecting subtitles.

14. The method of claim 12, wherein detecting the existing overlay subpicture comprises detecting a logo.

15. The method of claim 12, wherein detecting the existing overlay subpicture comprises detecting a timer.

16. The method of claim 1, wherein merging the separated overlay subpicture with the stabilized image to obtain the output image comprises:

laying the separated overlay subpicture over the stabilized image.

17. The method of claim 1, wherein merging the separated overlay subpicture with the stabilized image to obtain the output image comprises:

masking the input image except the separated overplay subpicture; and

laying the stabilized image over the masked input image.

18. A method of handling overlay subpictures in stabilized images, the method comprising:

separating an existing overlay subpicture from an input image to generate a separated overlay subpicture and a separated input image, wherein separating the existing overlay subpicture comprises;

recording a location of the existing overlay subpicture;

generating a copy of the existing overlay subpicture; and

separating the existing overlay subpicture from the input image;

stabilizing the separated input image to form a stabilized image; and

merging the separated overlay subpicture with the stabilized image to obtain an output image.

19. The method of claim 18, wherein merging the separated overlay subpicture comprises:

laying the copy over the stabilized image at the location.

20. A method of handling overlay subpictures in stabilized images, the method comprising:

separating an existing overlay subpicture from an input image to generate a separated overlay subpicture and a separated input image;

stabilizing the separated input image to form a stabilized image; and

merging the separated overlay subpicture with the stabilized image to obtain an output image, wherein merging the separated overlay subpicture with the stabilized image to obtain the output image comprises;

masking the input image except the separated overplay subpicture; and

laying the stabilized image over the masked input image.