Image processing system, projector, computer-readable medium and image processing method

• US 7,484,855 B2
• Filed: 12/07/2005
• Issued: 02/03/2009
• Est. Priority Date: 01/17/2005
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Matsuda, Hideki, Wada, Osamu, Kobayashi, Masanobu
• Primary Examiner(s): NGUYEN, HUNG
• Application Number:
  US11/295,451
• Publication Number:
  US 20060158623A1
• Time in Patent Office: 1,154 Days
• Field of Search: 353/30, 353/69, 353/70, 353/122, 348/806, 348/807, 345/207
• US Class Current: 353/122
• CPC Class Codes: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto

Abstract

A projector including: an adjustment section which generates edit image information for projecting an edit image including a content image based on input image information and a position change detection image at least partially provided outside the content image; a sensing section which senses a screen onto which the edit image is projected and generates sensing information indicating a sensed image; a projection section which projects the edit image based on the edit image information; and a determination section which determines whether or not a relative position between the projection section and the screen has changed based on the sensing information.

Claims

1. An image processing system, comprising:

an adjustment section which generates edit image information for projecting an edit image including a content image based on input image information and a position change detection image at least partially provided outside the content image;

a sensing section which senses a projection target onto which the edit image is projected and generates sensing information indicating a sensed image;

a projection section which projects the content image based on the input image information and projects the edit image based on the edit image information; and

a determination section which determines whether or not a relative position between the projection section and the projection target has changed based on the sensing information, the determination section determining whether or not the relative position has changed by determining the presence or absence of the position change detection image in a projection target area corresponding to the projection target in the sensed image.

2. The image processing system as defined in claim 1,

wherein the position change detection image is provided at top, bottom, right, and left outside the content image;

and

wherein the determination section determines at least one of a moving direction and an amount of movement of the relative position based on a detection state of the position change detection image in the sensed image.

3. The image processing system as defined in claim 1, comprising:

a projection target area information generation section which generates projection target area information on a position of the projection target area in the sensed image based on a difference in image signal value in pixel units in the sensed image,

wherein the determination section determines whether or not the relative position has changed based on the sensing information and the projection target area information.

4. The image processing system as defined in claim 3, wherein, when the

determination section has determined that the relative position has changed, the adjustment section adjusts at least one of a correction amount of the input image information and a control amount of a projection control section included in the projection section based on the determination result of the determination section.

5. The image processing system as defined in claim 4, comprising:

a projection area information generation section which generates projection area information on a position of a projection area corresponding to the image in the sensed image based on the difference in the image signal value in pixel units in the sensed image; and

a correction value deriving section which derives a correction value for distortion of the image on the projection target based on the projection target area information and the projection area information,

wherein the adjustment section adjusts at least one of the correction amount and the control amount based on the correction value so that distortion of the image is corrected.

6. The image processing system as defined in claim 1, comprising:

a notification section which notifies a user that the relative position has changed by using at least one of an image, sound, and light when the determination section has determined that the relative position has changed.

7. A projector comprising the image processing system as defined in claim 1.

8. A computer-readable medium comprising a computer program executed by a computer, the computer including a sensing section, a projection section, and a determination section, the program causing the computer to perform processing for:

the projection section to project an image including a position change detection image at least partially provided outside a content image based on input image information;

the sensing section to sense a projection target onto which the image is Projected and to generate sensing information indicating a sensed image; and

the determination section to determine whether or not a relative position between the projection section and the projection target has changed based on the sensing information,

the sensing section sensing the projection target in a sensing range including the projection target area; and

the determination section determining whether or not the relative position has changed by determining the presence or absence of the position change detection image in a projection target area corresponding to the projection target in the sensed image.

9. An image processing method, comprising:

projecting an image including a position change detection image at least partially provided outside a content image based on input image information;

sensing a projection target onto which the image is projected and generating sensing information indicating a sensed image; and

determining whether or not a relative position between a projection section and the projection target has changed based on the sensing information,

sensing the projection target in a sensing range including the projection target area; and

determining section determines whether or not the relative position has changed by determining the presence or absence of the position change detection image in a projection target area corresponding to the projection target in the sensed image.