TWI496032B - Cursor control method and the application of the cursor control method of the briefing system - Google Patents

Description

Cursor control method and briefing system using the same

The present invention relates to a cursor control method and a briefing system using the cursor control method, and aims to provide a cursor control method for mutually aligning an external cursor and an internal cursor, and a briefing system applying the cursor control method.

In the conference report, it is often necessary to use the projector to convert the ideas and information that the reporter wants to convey into text, charts and patterns projected onto the screen or wall. Liquid crystal projectors (Liguid Crystal Display) and DLP (Digital Light Processing) projection devices are often used as image projection sources, and these images are the charts, texts, and patterns that users want to express. These images are made by personal computers (PCs). Or a notebook computer (notebook); the computer generates a projection software, such as microsoft PowerPoint, to generate the projection image that needs to be generated when the briefing; the computer output image format is standard VGA format, super VGA or XGA format. The way LCD works with PCs for presentation work has gradually replaced the traditional transparent slides and has gradually become another new trend.

Usually, the optical indicator is used to indicate the projected image, so that the viewer can immediately know the part to be explained by the presenter, and the external cursor formed by the optical indicator and the internal cursor of the computer often confuse the audience. Therefore, there is a briefing system on the market that can move the external cursor and the internal cursor synchronously. As shown in the first figure, the computer 10 is connected to a projector 11 and a camera 12 respectively. The projector 11 projects the image 13 output from the computer 10 onto a projection plane 14, such as a screen. An optical pointer 15 projects the outer cursor 16 onto the projection plane 14. The camera 12 captures the image 13 on the projection plane 14 and the external cursor 16. Thereafter, the captured image 13 and the external cursor 16 are processed via the computer 10, and an appropriate control command is generated to move the internal cursor 17 to a position near the outer cursor 16.

However, when the camera 12 is not on the projection optical axis of the projector 11, when the projector 11, the projection plane 14, or the camera 12 is moved, the relative positional change between them will cause the size of the image of the captured image to change, and the internal and external cursors There is an error in the position, so recalibration is required to accurately control the internal cursor 17.

In view of this, the main object of the present invention is to provide a cursor control method for mutually aligning at least one set of external cursors and internal cursors, and a briefing system applying the cursor control method.

In order to achieve the above, the cursor control method of the present invention is a method for controlling at least one set of an external cursor and an internal cursor, wherein the external cursor is projected on a developing plane, and the internal cursor is generated by a computer. The computer projects the image onto the imaging plane through the projection device, wherein the projection device can simultaneously capture the image on the imaging plane and the external cursor, and reflect the external cursor to the light through the filtering effect on the projection optical axis. The image sensor detects the external cursor in the first position of the image by the image sensor, so that the internal cursor moves to the first position, so that the external cursor moves synchronously with the internal cursor, and The coordinate change is recalibrated each time the position of the projection device changes relative to the development plane.

In order to enable the reviewing committee members to understand the main technical contents of the present invention, and the embodiments, the following description is provided as follows: As shown in the second to fourth figures, the briefing system 2 of the present invention includes at least: a computer 21; a projection device 22, the projection device 22 is further provided with a lens 221 and a projector (not shown), the projection device 22 is connected to the computer 21 to receive the signal of the computer 21 to output an image, and the projection The optical machine projects the image onto the imaging plane 23, and captures the image 31 and the external cursor 42 on the imaging plane 23, wherein the image projection and the captured image of the projection device 22 are located on the projection optical machine via the lens. Projected onto the optical axis of the imaging plane; a developing plane 23 for displaying the image, the image 31 including the internal cursor 24 generated by the computer 21; at least one optical indicator 41 for external cursor 42 is projected on the imaging plane 23; an optical component, in the embodiment, the optical component is mainly composed of a filter 25, and the image 31 projected by the projection device 22 and the external cursor 42 are received, and the optical component is projected. External cursor 42 reverse The image sensor 26 can be a complementary metal-oxide semiconductor (CMOS) or a charge coupled device (CCD). The image sensor 26 is connected to the computer 21. In the embodiment shown in the figure, the image sensor 26 and/or the filter 25 can be disposed in the projection device 22 and detect the external portion. The cursor 42 is at a first position A1 of the image 31.

Please refer to FIG. 5 at the same time, the control method of the present invention is described as follows: the computer 21 transmits a signal to the projection device 22 and outputs an image 31, which is outputted to the development plane 23 via the lens 221; an external cursor 42 is projected on the imaging plane 23, and at the same time, the image 31 and the external cursor 42 on the imaging plane 23 capture images through the lens 221 and receive light to the filter 25, and the filter 25 functions. The light from the outer cursor 42 can be reflected or refracted to the image sensor 26.

Furthermore, when the presentation system is used for the first time, the image 31 on the imaging plane can be aligned with the four points (P1, P2, P3, P4) of the pixel array 261 in the optical sensor. As shown in the fourth figure, the sensing pixel array 261 of the optical sensor can be made to correspond to the image 31 of the imaging plane.

The external cursor 42 and the internal cursor 24 are corrected and obtained corresponding to each other. The image sensor 26 has a pixel corresponding to the imaging plane 23, for example, the corresponding relationship is a γ value, and the image is composed of the image. The sensor 26 detects the original cursor 42 at the original position A0' (x ₀ ', y ₀ ') of the image 31, and the external cursor 41 moves to the first position A1' (x ₁ ', y ₁ ') The computer 21 can also obtain the original position A0 (x ₀ , y ₀ ) of the internal cursor 24, and the internal cursor 24 moves to the second position A2 (x ₁ , y ₁ ), where:

(x ₁ '-x ₀ ', y ₁ '-y ₀ ')=γ×(x ₁ -x ₀ 'y ₁ -y ₀ )+d

Where d(x ₀ -x ₀ ', y ₀ -y ₀ ') is the initial inner and outer cursor position difference compensation value, and the inner cursor 24 can be moved according to the above formula to the first position A1', and the correction The step (γ, d) only needs to be performed during the first use, and then the external cursor 42 moves to obtain the same internal cursor 24 movement value, so that the external cursor 42 can move synchronously with the internal cursor 24.

It is worth mentioning that the present invention has the following advantages over the Xia system:

1. The invention does not require additional use of a camera, and the cost is low.

2. Capture or project images directly through the projection lens.

3. In the Xia Briefing System, the camera is not on the projection optical axis of the projector. As shown in Figure 6 (A), the projector is in position A, and the camera is in position B, and when the projector, projection plane or When the camera is moved, the relative position change between them will cause the image size of the captured image to change. As shown in the sixth figure (B), the original image is C1-C4, and the relative position changed image is C1'- In the present invention, the image projection and the captured image of the projection device are all located on the same optical axis. As shown in the seventh diagram (A), the image projection A and the captured image B of the projection device are both located at the position C. (C=A=B), so when the relative position of the projection device and the developing plane is changed, as shown in the seventh figure (B), the captured images are not moved to the original plane, and are not projected onto the developing plane. The image is skewed.

4. At least one set of external cursors can be used and can be tracked accordingly.

As described above, the present invention provides a preferred viable cursor control method and a briefing system using the cursor control method, and an application for an invention patent is filed according to law; however, the above description and drawings show that the present invention The preferred embodiment is not intended to limit the invention, and it should be construed that the structure, the device, the features, and the like of the present invention are similar to those of the present invention.

10. . . computer

11. . . Projector

12. . . camera

13. . . image

14. . . Projection plane

15. . . Optical indicator

16. . . External cursor

17. . . Internal cursor

twenty one. . . computer

twenty two. . . Projection device

221. . . Lens

twenty three. . . Imaging plane

twenty four. . . Internal cursor

25. . . Filter

26. . . Image sensor

261. . . Sensing pixel array

31. . . image

41. . . Optical indicator

42. . . External cursor

The first figure is a structural perspective view of the first conventional presentation system.

The second figure is a perspective view of the structure of the briefing system of the present invention.

The third figure is a schematic cross-sectional view of the structure of the briefing system of the present invention.

The fourth figure is a schematic diagram of the offset vector of the internal cursor and the external cursor in the present invention.

The fifth figure is a schematic flow chart of the control method in the present invention.

The sixth figure (A) and (B) are schematic diagrams showing the relative positional changes of the projection device and the imaging plane of the conventional presentation system.

The seventh diagrams (A) and (B) are diagrams showing the relative positional changes of the projection device and the imaging plane in the present invention.

22‧‧‧Projector

221‧‧‧ lens

23‧‧‧Development plane

25‧‧‧ Filter

26‧‧‧Image Sensor

31‧‧‧Image

Claims (11)

A cursor control method for controlling at least one set of external cursors and an internal cursor, the external cursor is projected on a developing plane, the internal cursor is generated by a computer, and the computer projects the image into the image through the projection device In the plane, the projector is provided with a filter and an image sensor. The method includes the following steps: A. The projection device captures an image on the imaging plane and an external cursor; B, the image and After the external cursor is filtered by the filter, the light of the external cursor can be reflected or refracted to the image sensor, and the image sensor is disposed in the projection device to project an image of the projection device and The image is located on the same optical axis and has a pixel corresponding to the imaging plane; C, the image sensor detects the coordinate value of the external cursor at the first position of the image; D, the first The position and the internal cursor are compared with each other at a second position coordinate value of the image to obtain an offset vector; E. The internal cursor moves according to the offset vector. The cursor control method according to claim 1, wherein in the step A, an image on the imaging plane is captured by a lens set by the projection device. The cursor control method according to claim 1 or 2, wherein the image sensor can be a complementary metal oxide semiconductor (complementary Metal-oxide semiconductor (CMOS) or a charge coupled device (CCD). The cursor control method according to claim 1 or 2, wherein the color and/or shape of the internal cursor is detected in the step D to obtain the second position. The cursor control method of claim 1 or 2, wherein the external cursor is projected on the imaging plane by at least one optical indicator. The cursor control method according to claim 1 or 2, wherein the alignment of the image on the imaging plane and the optical sensor is performed before the step A. A briefing system includes at least: a computer; a projection device connected to the computer to receive the signal of the computer to output an image, and capture images and external cursors on the imaging plane; a developing plane for displaying the image, the image comprising an internal cursor generated by the computer; at least one optical indicator for projecting an external cursor on the imaging plane; a filter, the image The filter is disposed in the projection device, and the image projected by the projection device and the external cursor are received, and the external cursor is reflected or refracted to the image sensor; an image sensor, the image sensor Connected to the computer and detects the coordinate value of the external cursor in the first position of the image, the image sensing The device is disposed in the projection device such that the image projection and the captured image of the projection device are both on the same optical axis and have pixels corresponding to the imaging plane. The presentation system of claim 7, wherein the projection device is provided with a lens for capturing an image on the imaging plane. The presentation system of claim 7, wherein the image sensor can be a complementary metal-oxide semiconductor (CMOS) or a charge coupled device (CCD). The presentation system of claim 9, wherein the image sensor and/or the filter can be disposed in the projection device. The presentation system of claim 7 or 8, wherein the first time the presentation system is used, the image on the imaging plane is aligned with the optical sensor.