Global motion estimation

• US 20010031070A1
• Filed: 03/27/2001
• Published: 10/18/2001
• Est. Priority Date: 03/30/2000
• Status: Abandoned Application

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Cheng, Tzu-Hung, Wei, Christopher, Horng, Jyh-Kuen
• Application Number:
  US09/817,972
• Publication Number:
  US 20010031070A1
• Time in Patent Office: Days
• US Class Current: 382/107
• CPC Class Codes: H04N 19/527 Global motion vector estimation
• CPC Class Codes: H04N 5/145 Movement estimation for video coding H04N19/51

Abstract

In a method of estimating (BME) a global motion vector (GMV), only a central part (C) of an electronic image (EI) is used, which central part (C) is substantially smaller than the electronic image (EI).

Claims

1. A method of estimating a global motion vector (GMV), the method comprising the steps of:

furnishing (O) an electronic image (EI); and

estimating (BM, GME) the global motion vector using only a central part (C) of the electronic image (EI), which central part (C) is substantially smaller than the electronic image (EI).

2. A method as claimed in

claim 1

, wherein the central part (C) is less than 75% of the electronic image (EI).

3. A method as claimed in

claim 2

, wherein the central part (C) is less than 50% of the electronic image (EI).

4. A method as claimed in

claim 1

, wherein the central part (C) substantially equals 25% of the electronic image (EI).

5. A device for estimating a global motion vector (GMV), the device comprising:

means for furnishing (O) an electronic image (EI); and

means for estimating (BM, GME) the global motion vector using only a central part (C) of the electronic image (EI), which central part (C) is substantially smaller than the electronic image (EI).

6. A camera, comprising:

an image pickup unit (PUU) for furnishing (O) an electronic image (EI); and

means for estimating (BM, GME) the global motion vector using only a central part (C) of the electronic image (EI), which central part (C) is substantially smaller than the electronic image (EI).