Position detecting device, position detecting system, and controlling method of position detecting device

• US 9,753,580 B2
• Filed: 01/16/2015
• Issued: 09/05/2017
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kubota, Shinji
• Primary Examiner(s): Davis, Tony
• Application Number:
  US14/598,835
• Publication Number:
  US 20150205376A1
• Time in Patent Office: 963 Days
• Field of Search: 345156, 345170-176
• CPC Class Codes: G06F 3/03542 Light pens for emitting or receiving light
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• 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

Abstract

A projector includes a position detection unit and a calibration control unit. The calibration control unit executes first calibration relevant to a manipulation position of an indicator performing a manipulation on a screen, and second calibration relevant to a manipulation position of an indicator performing a manipulation on the screen. Then, the calibration control unit provides a user interface allowing indication of whether or not the second calibration is to be executed after the first calibration is executed.

Claims

1. A position detecting device, comprising:

a camera which captures an image of a manipulation surface;

a processor configured to;

detect a manipulation position on the basis of the captured image obtained by the camera; and

execute a first calibration relevant to a manipulation position of a first indicator performing a manipulation on the manipulation surface, and a second calibration relevant to a manipulation position of a second indicator performing a manipulation on the manipulation surface,

wherein, in response to completion of the first calibration, the processor provides a user interface for receiving an indication for determining whether or not the second calibration is to be executed.

2. The position detecting device according to claim 1, further comprising:

a display unit which displays an image on the manipulation surface,

wherein the processor executes the first calibration and the second calibration on the basis of the captured image which is obtained by capturing a calibration image while the calibration image is displayed by the display unit.

3. The position detecting device according to claim 2,

wherein the processor detects the calibration image from the captured image in the first calibration and detects an image of the second indicator from the captured image in the second calibration.

4. The position detecting device according to claim 2,

wherein the processor acquires calibration data which converts a manipulation position detected by the first calibration from the captured image into a position on the image displayed by the display unit.

5. The position detecting device according to claim 2,

wherein the processor acquires correction data correcting the position on the image obtained by using the calibration data by the second calibration.

6. The position detecting device according to claim 1,

wherein the processor detects an image of light emitted by the first indicator from the captured image, and an image of reflected light which is obtained by the detection light being reflected by the second indicator.

7. The position detecting device according to claim 6, further comprising:

a light output unit which outputs the detection light along the manipulation surface.

8. A position detecting system, comprising:

a position detecting device which detects a manipulation position of a first indicator and a second indicator performing a manipulation on a manipulation surface; and

a light output device which outputs detection light along the manipulation surface,

wherein the position detecting device includes;

a camera which captures the manipulation surface, and

a processor configured to;

detect a manipulation position by detecting an image of light emitted by the first indicator and an image of reflected light obtained by the detection light of the light output device being reflected by the second indicator from a captured image of the camera, and

execute a first calibration relevant to the manipulation position of the first indicator, and a second calibration relevant to the manipulation position of the second indicator, and

in response to completion of the first calibration, the processor provides a user interface allowing indication of whether or not the second calibration is to be executed after the first calibration is executed.

9. A controlling method of a position detecting device, comprising:

detecting a manipulation position on the basis of a captured image obtained by capturing a manipulation surface;

executing a first calibration relevant to a manipulation position of a first indicator performing a manipulation on the manipulation surface, and a second calibration relevant to a manipulation position of a second indicator performing a manipulation on the manipulation surface; and

providing a user interface allowing indication of whether or not the second calibration is to be executed after the first calibration is executed.