SOUND-BASED FOCUS SYSTEM AND FOCUS METHOD THEREOF

• US 20100166406A1
• Filed: 06/10/2009
• Published: 07/01/2010
• Est. Priority Date: 12/29/2008
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Fan, Shih-Yuan
• Granted Patent: US 7,986,875 B2
• Time in Patent Office: Days
• US Class Current: 396/105
• CPC Class Codes: G02B 7/28 Systems for automatic generation of focusing signals
• CPC Class Codes: G03B 13/32 Means for focusing

Abstract

A sound-based focus system includes an imaging device and focus controller. The imaging device is configured for capturing an image. The focus controller includes a sound detecting module and a control module. The sound detecting module is configured for obtaining the position coordinates of a sound source. The control module is configured for controlling the imaging device to focus on the sound source according to the position coordinates thereof.

Claims

1. A sound-based focus system comprising:

an imaging device configured for capturing an image; and

a focus controller comprising;

a sound detecting module configured for obtaining the position coordinates of a sound source;

a control module configured for controlling the imaging device to focus on the sound source according to the position coordinates thereof.

2. The sound-based focus system of claim 1, wherein the imaging device comprises a focus lens and a driving unit configured for driving the focus lens to move along an optical axis of the focus lens and adjusting the orientation of the focus lens to aim at the sound source.

3. The sound-based focus system of claim 2, wherein the control module controls the driving unit to drive the focus lens to focus on the detected sound source according to the position coordinates of the sound source.

4. The sound-based focus system of claim 1, further comprising a judging module and a selecting module, wherein the judging module is configured for judging the number of sound sources, the selecting module is configured for selecting a sound source based on a predefined selecting condition when the number of the sound sources is more than one.

5. The sound-based focus system of claim 4, wherein the control module controls the driving unit to drive the focus lens to focus on the selected sound source according to the position coordinates when the number of the sound sources is more than one.

6. The sound-based focus system of claim 4, wherein the sound detecting module is further configured for obtaining the intensities of the sound sources.

7. The sound-based focus system of claim 6, wherein the selecting module selects a sound source having the highest intensity when the number of the sound sources is more than one.

8. The sound-based focus system of claim 6, wherein the selecting module selects a sound source having the lowest intensity when the number of the sound sources is more than one.

9. The sound-based focus system of claim 4, wherein the selecting module selects a sound source having the longest radial distance when the number of the sound sources is more than one.

10. The sound-based focus system of claim 9, wherein the selecting module selects a sound source having the shortest radial distance when the number of the sound sources is more than one.

11. A sound-based focus method comprising:

obtaining the position coordinates of a sound sources;

focusing on the sound source according to the position coordinates thereof.

12. The sound-based focus method of claim 11, further comprising a step of judging the number of sound sources and selecting a sound source by the position coordinates of the sound sources when the number of the sound sources is more than one after the step of judging the number of sound sources.

13. The sound-based focus method of claim 12, further comprising a step of obtaining the position coordinates of the sound sources.

14. The sound-based focus method of claim 13, further comprising a step of selecting one sound source from the sound sources based on a predefined selecting condition before the step of focusing on the sound source.

15. The sound-based focus method of claim 14, wherein the step of selecting comprises selecting a sound source having the longest radial distance when the number of the sound sources is more than one.

16. The sound-based focus method of claim 14, wherein the step of selecting comprises selecting a sound source having the shortest radial distance when the number of the sound sources is more than one.

17. The sound-based focus method of claim 11, further comprising a step of judging the number of sound sources and selecting a sound source by intensities of the sound sources when the number of the sound sources is more than one after the step of judging the number of sound sources.

18. The sound-based focus method of claim 17, wherein the selecting step comprises selecting a sound source having the highest intensity when the number of the sound sources is more than one.

19. The sound-based focus method of claim 17, wherein the selecting step comprises selecting a sound source having the lowest intensity when the number of the sound sources is more than one.

20. The sound-based focus method of claim 17, wherein further comprising obtaining the position coordinates of the selected sound source after the step of selecting one sound source and before the step of focusing on the sound source.