Image Rectification Method and Related Device for a Video Device

• US 20090179984A1
• Filed: 12/29/2008
• Published: 07/16/2009
• Est. Priority Date: 01/10/2008
• Status: Active Grant

• Current Assignee: ASUSTek Computer, Inc.
• Original Assignee: ASUSTek Computer, Inc.
• Inventors: Chen, Liang-Gee, Pan, Chia-Ho
• Granted Patent: US 8,253,776 B2
• Time in Patent Office: Days
• US Class Current: 348/14.80
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation

Abstract

An image rectification method for a video device includes receiving an image that is a facial image of a transmitter from the transmitter, obtaining a first angular deviation with respect to line of sight of the transmitter according to the image, obtaining a second horizontal angular deviation and a second vertical angular deviation with respect to line of sight of a receiver using the video device, and performing an image synthesis procedure on the image according to the first angular deviation, the second horizontal angular deviation and the second vertical angular deviation, for generating an eye-to-eye image sent to the receiver.

Claims

1. An image rectification method for a video device, the image rectification method comprising:

receiving an image that is a facial image of a transmitter from the transmitter;

obtaining a first angular deviation with respect to line of sight of the transmitter according to the image;

obtaining a second horizontal angular deviation and a second vertical angular deviation with respect to line of sight of a receiver using the video device; and

performing an image synthesis procedure on the image according to the first angular deviation, the second horizontal angular deviation and the second vertical angular deviation, for generating an eye-to-eye image sent to the receiver.

2. The image rectification method of claim 1 further comprising obtaining an inclined angle between a screen of the video device and a plumb line.

3. The image rectification method of claim 2, wherein the step of performing the image synthesis procedure on the image comprises performing the image synthesis procedure on the image of the transmitter according to the first angular deviation, the second horizontal angular deviation, the second vertical angular deviation and the inclined angle, for generating the eye-to-eye image sent to the receiver.

4. The image rectification method of claim 1, wherein the step of obtaining the first angular deviation comprises measuring depth information of the image according to a Motion Estimation algorithm for obtaining the first angular deviation.

5. The image rectification method of claim 1, wherein the step of obtaining the second horizontal angular deviation and the second vertical angular deviation comprises obtaining the second horizontal angular deviation and the second vertical angular deviation according to a position of the receiver, a position of a camera of the video device and a position of the image of the transmitter shown in the video device.

6. The image rectification method of claim 5, wherein the position of the image of the transmitter is determined by a cursor controlled by the receiver.

7. The image rectification method of claim 1, wherein the step of performing the image synthesis procedure on the image comprises performing the image synthesis procedure on the image of the transmitter according to a Depth-Image-Based Rendering (DIBR) method.

8. An image rectification device for a video device, the image rectification device comprising:

a receiving unit for receiving an image that is a facial image of a transmitter from the transmitter;

an angle measurement unit coupled to the receiving unit for obtaining a first angular deviation with respect to line of sight of the transmitter according to the image, and obtaining a second horizontal angular deviation and a second vertical angular deviation with respect to line of sight of a receiver using the video device; and

an image synthesis unit coupled to the receiving unit and the angle measurement unit for performing an image synthesis procedure on the image according to the first angular deviation, the second horizontal angular deviation and the second vertical angular deviation, for generating an eye-to-eye image to sent the receiver.

9. The image rectification device of claim 8, wherein the angle measurement unit is further utilized for obtaining an inclined angle between a screen of the video device and a plumb line.

10. The image rectification device of claim 9, wherein the image synthesis unit performs the image synthesis procedure on the image according to the first angular deviation, the second horizontal angular deviation, the second vertical angular deviation and the inclined angle.

11. The image rectification device of claim 8, wherein the angle measurement unit measures the depth information of the image according to a Motion Estimation algorithm for obtaining the first angular deviation.

12. The image rectification device of claim 8, wherein the angle measurement unit obtains the second horizontal angular deviation and the second vertical angular deviation according to a position of the receiver, a position of a camera of the video device and a position of the image of the transmitter shown in the video device.

13. The image rectification device of claim 12, wherein the position of the image of the transmitter is determined by a cursor controlled by the receiver.

14. The image rectification device of claim 8, wherein the image synthesis unit performs the image synthesis procedure on the image according to a Depth-Image-Based Rendering (DIBR) method.