Projector and projection control method

• US 8,452,057 B2
• Filed: 10/06/2010
• Issued: 05/28/2013
• Est. Priority Date: 05/17/2010
• Status: Active Grant

• Current Assignee: Cloud Network Technology Singapore Pte. Ltd. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: WANG, SHAO-WEN, Chen, Chien-Lin
• Primary Examiner(s): Koziol, Stephen R
• Assistant Examiner(s): GILLIARD, DELOMIA L
• Application Number:
  US12/899,538
• Publication Number:
  US 20110280441A1
• Time in Patent Office: 965 Days
• Field of Search: None
• US Class Current: 382/114
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386
• CPC Class Codes: G06V 40/28 Recognition of hand or arm movements, e.g. recognition of deaf sign language static hand signs G06V40/113

Abstract

A method controls a projection of a projector. The method predetermines hand gestures, and assigns an operation function of an input device to each of the predetermined hand gestures. When an electronic file is projected onto a screen, the projector receives an image of a speaker captured by an image-capturing device connected to the projector. The projector identifies whether a hand gesture of the speaker matches one of the predetermined hand gestures. If the hand gesture matches one of the hand gestures, the projector may execute a corresponding assigned operation function.

Claims

1. A projection control method for a projector connected to an image capturing device, the method comprising:

predetermining hand gestures, assigning an operation function of an input device to each of the predetermined hand gestures, the hand gestures comprising a first hand gesture associated with execution of an operation function of a scroll wheel of a mouse, a second hand gesture associated with execution of an operation function of a right mouse button of the mouse, and a third hand gesture associated with execution of an operation function of a left mouse button of the mouse;

receiving an image of a speaker captured by the image capturing device when an electronic file is projected onto a screen by the projector;

identifying whether a hand gesture of the speaker matches one of the predetermined hand gestures;

searching a fingertip of one finger of the hand gesture, and projecting a cursor on an image of the fingertip, the cursor being controlled in the same position when a hand of the speaker leaves from the front of the screen, and the cursor being controlled in the same position when the hand of the speaker is moved; and

upon the condition that the hand gesture matches one of the predetermined hand gestures, executing a corresponding assigned operation function.

2. The method as described in claim 1, wherein the first hand gesture represents a number one.

3. The method as described in claim 1, wherein the second hand gesture represents a number four.

4. The method as described in claim 1, wherein the third hand gesture represents a letter L.

5. The method as described in claim 1, further comprising:

determining whether the hand gesture of the speaker exists in the image;

identifying whether the hand gesture of the speaker matches one of the predetermined hand gestures when the hand gesture is in the image.

6. A projector connected to an image-capturing device, the projector comprising:

at least one processor;

a storage system; and

a projection control unit stored in the storage system and executed by the at least one processor, the projection control unit comprising;

a defining module operable to predetermine hand gestures, and assign an operation function of an input device to each of the predetermined hand gestures, the hand gestures comprising a first hand gesture associated with execution of an operation function of a scroll wheel of a mouse, a second hand gesture associated with execution of an operation function of a right mouse button of the mouse, and a third hand gesture associated with execution of an operation function of a left mouse button of the mouse;

an identification module operable to receive an image of a speaker captured by the image-capturing device when an electronic file is projected onto a screen by the projector, and identify whether a hand gesture of the speaker matches one of the predetermined hand gestures;

a control module operable to search a fingertip of one finger of the hand gesture, and control the projector to project a cursor on an image of the fingertip;

the control module further operable to control the cursor in the same position when a hand of the speaker leaves from the front of the screen, and control the cursor in the same position when the hand of the speaker is moved; and

an execution module operable to execute the corresponding operation function of the input device according to the matched hand gesture.

7. The projector as described in claim 6, wherein the first hand gesture represents a number one.

8. The projector as described in claim 6, wherein the second hand gesture represents a number four.

9. The projector as described in claim 6, wherein the third hand gesture represents a letter L.

10. The projector as described in claim 6, wherein the identification module is further operable to determine whether the hand gesture of the speaker exists in the image.

11. A non-transitory storage medium having stored thereon instructions that, when executed by a processor of a projector, cause the projector to perform a projection control method, the method comprising:

predetermining hand gestures, assigning an operation function of an input device to each of the predetermined hand gestures, the hand gestures comprising a first hand gesture associated with execution of an operation function of a scroll wheel of a mouse, a second hand gesture associated with execution of an operation function of a right mouse button of the mouse, and a third hand gesture associated with execution of an operation function of a left mouse button of the mouse;

receiving an image of a speaker captured by the image capturing device when an electronic file is projected onto a screen by the projector;

identifying whether a hand gesture of the speaker matches one of the predetermined hand gestures;

searching a fingertip of one finger of the hand gesture, and projecting a cursor on an image of the fingertip, the cursor being controlled in the same position when a hand of the speaker leaves from the front of the screen, and the cursor being controlled in the same position when the hand of the speaker are moved; and

upon the condition that the hand gesture matches one of the predetermined hand gestures, executing a corresponding assigned operation function.

12. The storage medium as described in claim 11, wherein the first hand gesture represents a number one, the second hand gesture represents a number four, and the third hand gesture represents a letter L.