WO2018209877A1 - Position indicating method, operating apparatus, display apparatus, and position indicating apparatus - Google Patents

Abstract

A position indicating method, an operating apparatus, a display apparatus, and a position indicating apparatus, the method comprising: the operating apparatus indicates any position on a display screen of the display apparatus from a non-contact position, and photographs the indicated position to obtain an imaging picture (S11); the operating apparatus identifies a position identifier in the imaging picture at the current time (S12); when identifying a position identifier in the imaging picture at the current time, on the basis of the coordinates of the position identifier in the imaging picture at the current time, the operating apparatus acquires coordinates of the indicated position on the display screen at the current time (S13); when not identifying the position identifier in the imaging picture at the current time, on the basis of the coordinates of the position identifier in the imaging picture at time X and the movement displacement of the operating apparatus between time X and the current time, the operating apparatus acquires the coordinates of the indicated position on the display screen at the current time (S14); and the operating apparatus sends the coordinates of the indicated position on the display screen at the current time to the display apparatus, such that the display apparatus performs display processing of the indicated position on the display screen (S15). The present method can calculate the coordinates of the indicated position on the display screen regardless of whether the position identifier has been identified on the imaging picture at the current time, overcoming the defect of being unable to perform normal indication due to photographic blind spots.

Description

Position indication method, operation device, display device and position indication device Technical field

The present invention relates to the field of electronic display technologies, and in particular, to a position indication method, an operation device, a display device, and a position indication device.

Background technique

In a meeting or teaching scenario, the presenter typically uses a laser pointer to project a spot of light onto the screen to indicate a particular location on the screen. The laser pointer, also known as the laser pen, the star pen, etc., is a pen-type transmitter that is designed to be a portable, hand-friendly, laser module (light-emitting diode).

There are two drawbacks to using a laser pointer for position indication:

First, many laser pens and laser flashlights on the market are classified as Class IIIB with a power of more than 5mW. If the laser is directly into the eyes, it may cause eye damage. Some high-power laser pointers, diffused light may also cause damage to the eyes, and it is more likely to ignite flammable products after focusing;

Second, for a display device using glass as a display screen, the laser pointer cannot be formed into a light spot due to total reflection of the glass when projected onto the display screen.

Another solution in the prior art is to use a laser pointer instead of a laser pointer. Specifically, a camera module is disposed on the indicator, and a position identifier is disposed on the display screen, and the indicator calculates a coordinate of the position indicated by the indicator on the display screen according to the coordinates of the position identifier in the image capturing screen, so that The display performs display processing on the indicated position.

Although this solution does not have the drawback of the laser pointer, it cannot be used at close range. When the distance is too close, the camera screen can only capture a part of the display screen, so that the pointer can easily not capture the position marker during the movement, that is, there is a blind spot. For example, the position marker can be captured in the previous frame of the image capture screen, and the position marker cannot be captured in the next frame of the image capture screen due to the movement of the pointer. According to the principle of this scheme, if the position image of the current frame cannot capture the position marker, the coordinates of the position indicated by the pointer on the display screen cannot be calculated. Therefore, the accuracy of this scheme is too low, and it is easy to appear that it cannot be normally indicated.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a position indication method, an operation device, a display device, and a position indication device, which are applicable to various display devices, and accurately indicate a position that needs to be instructed, thereby avoiding a blind spot that causes an abnormal indication. Case.

In order to achieve the above object, a first aspect of the present invention provides a location indication method, including:

The operating device indicates an arbitrary position on the display screen of the display device from the non-contact position, and photographs the pointed position to obtain an image forming screen; wherein the display device is provided with a position identifier;

The operating device identifies the location identifier in an imaging screen at a current time;

When the operation device recognizes the position identifier in the imaging screen of the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

When the operating device does not recognize the position identifier in the imaging picture at the current time, the imaging according to the position identifier at time X a coordinate in the picture and a motion displacement between the X time and the current time of the operating device, acquiring coordinates of the indicated position on the display screen at the current time; wherein the X time means that the last time the The moment of the location marker;

The operating device transmits coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.

Preferably, when the operation device recognizes the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at the current time, the current position indication position is obtained in the display. The coordinates on the screen, including:

The operating device acquires coordinates (x1, y1) in the imaging picture of the current time position when the position identifier is recognized in the imaging picture at the current time;

The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.

Preferably, when the operation device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at the X time and the current time The motion displacement between the two is obtained, and the coordinates of the indicated position on the display screen at the current time are obtained, including:

When the operation device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) of the position identifier in the imaging picture at time X and the operation device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the location indication method further includes:

When the operating device is restarted or the duration between the X time and the current time exceeds a preset duration threshold, the operating device clears the storage of the coordinates of the position identifier in the imaged image when it is last recognized. data;

The operating device does not recognize the position identifier in the imaging picture at the current time, and cannot find an invalid coordinate when the position identifier stores the data of the coordinates in the imaging picture when it is last recognized. As the current time, the coordinates of the indicated position on the display screen are prompted and the user is prompted to adjust the position of the operating device until the operating device recognizes the position marker again in the imaging screen.

Preferably, the position identifier is an infrared LED lamp.

Preferably, the operating device transmits, by using wireless, the coordinates of the indicated position on the display screen at the current time to the display device, so that the display device performs the indicated position on the display screen. Display processing.

In order to achieve the same object, a second aspect of the present invention provides an operating device comprising:

a photographing module, configured to instruct an arbitrary position of a display screen of the display device from a non-contact position, and photograph the indicated position to obtain an image forming screen; wherein the display device is provided with a position identifier;

a identifier identifying module, configured to identify the location identifier in an imaging picture at a current time;

a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

And a coordinate sending module configured to send coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.

Preferably, the first coordinate acquisition module comprises:

a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

a first coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinate (x1, y1); wherein x2=x1·L2/L1, y2 = y1 · W2 / W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the imaging picture.

Preferably, the second coordinate acquisition module comprises:

a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y1′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the operating device further comprises:

a coordinate data clearing module, configured to clear a coordinate of the position identifier in the imaged image when the position identifier is last recognized after the operating device is restarted or when the duration between the X time and the current time exceeds a preset duration threshold Storing data;

a third coordinate acquiring module, configured to not recognize the position identifier in the imaging picture at the current time, and cannot find the stored data of the coordinates of the position identifier in the imaging picture when the position identifier is last recognized Obtaining an invalid coordinate as the coordinate of the indicated position on the display screen at the current time, and prompting the user to adjust the position of the operating device until the operating device recognizes the position identifier again in the imaging screen.

Preferably, the position identifier is an infrared LED lamp.

Preferably, the coordinate sending module is configured to send, by using wireless, coordinates of the indication position on the display screen at a current moment to the display device, so that the display device is configured on the display screen. Indicate the position for display processing.

In order to achieve the same object, a third aspect of the present invention provides a location indication method, including:

The display device acquires an imaging screen transmitted by the operation device; the imaging screen is obtained by the operation device when the operation device indicates an arbitrary position on the display screen of the display device from a non-contact position; wherein the display a position identifier is disposed on the device;

The display device identifies the location identifier in an imaging picture at a current time;

When the display device recognizes the location identifier in the imaging picture of the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

When the display device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the motion displacement between the X time and the current time of the operating device Obtaining the current time indication position in the Displaying the coordinates on the screen; wherein the X time refers to the time when the position identifier can be recognized last time;

The display device performs display processing on the indication position on the display screen based on the coordinates of the indicated position on the display screen at the current time.

Preferably, when the display device recognizes the location identifier in the imaging picture of the current time, according to the coordinates of the position identifier in the imaging picture at the current time, the current position indication position is obtained in the display. The coordinates on the screen, including:

The display device acquires the coordinates (x1, y1) of the position identifier in the imaging picture at the current time when the position identifier is recognized in the imaging picture at the current time;

The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.

Preferably, when the display device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at the X time and the current time The motion displacement between the two is obtained, and the coordinates of the indicated position on the display screen at the current time are obtained, including:

When the display device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) in the imaging picture of the position identifier at time X and the operating device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the position identifier is an infrared LED lamp.

In order to achieve the same object, a fourth aspect of the present invention provides a display device comprising:

An imaging picture acquiring module, configured to acquire an imaging picture sent by the operating device; the imaging picture is obtained by the operating device when the operating device indicates an arbitrary position on the display screen of the display device from a non-contact position; Wherein the display device is provided with a position identifier;

a identifier identifying module, configured to identify the location identifier in an imaging picture at a current time;

a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

And a display processing module, configured to perform display processing on the indication position on the display screen according to coordinates of the indicated position on the display screen at the current time.

Preferably, the first coordinate acquisition module comprises:

a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

a first coordinate calculation unit, configured to calculate, according to coordinates (x1, y1), coordinates of the indicated position on the display screen at the current time (x2, y2); wherein x2=x1·L2/L1, y2=y1·W2/W1; L1 is the length of the imaging picture, L2 is the length of the display picture, and W1 is the width of the imaging picture , W2 is the width of the display screen.

Preferably, the second coordinate acquisition module includes:

a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y1′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the position identifier is an infrared LED lamp.

In order to achieve the same object, a fifth aspect of the present invention provides a location indication method, including:

Acquiring an imaging picture; the imaging picture is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier is disposed on the display device;

Identifying the location marker at the current imaging screen;

When the location identifier is recognized in the imaging picture at the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

When the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the motion displacement of the operating device between the X time and the current time, The current position indicates the coordinates of the position on the display screen; wherein the X time refers to the time when the position identifier can be recognized last time;

The indicated position is displayed on the display screen according to coordinates of the indicated position on the display screen at the current time.

In order to achieve the same object, a sixth aspect of the present invention provides a position indicating device, comprising:

An imaging picture acquiring module, configured to acquire an imaging picture; the imaging picture is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier is set On the display device;

a identifier identifying module, configured to identify the location identifier at the current imaging screen;

a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

And a display control module, configured to control the indication position to be displayed on the display screen according to coordinates of the indicated position on the display screen at the current time.

Compared with the prior art, an embodiment of the present invention provides a position indication method, an operation device, a display device, and a position indication device, wherein the position indication method includes the operation device from a non-contact position. Uppointing an arbitrary position on the display screen of the display device, and photographing the pointed position to obtain an imaged image; the operating device identifies the position marker in the imaged image at the current time; the operating device recognizes in the imaged image at the current time When the location identifier is obtained, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time; the imaging drawing of the operation device at the current time When the position identifier is not recognized in the surface, the current time indication is obtained according to the coordinates of the position identifier in the imaging picture at time X and the motion displacement between the X time and the current time of the operating device. a coordinate positioned on the display screen; the operating device transmits coordinates of the indicated position on the display screen at a current time to the display device, so that the display device pairs the indication on the display screen The position is displayed for processing. The method adopts an operation device with a camera function, instead of a laser pointer, which does not cause damage or harm to the human eye, and can be applied to any display device;

With the method, the coordinates of the indication position in the display screen can be calculated regardless of whether the position marker is recognized on the imaging picture at the current time, and the defect that cannot be normally indicated due to the shooting blind spot in the prior art is overcome.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained from these drawings without any creative work.

1 is a schematic flow chart of a location indication method according to a first embodiment of the present invention;

2 is a schematic diagram showing states of a current time display screen and an imaging screen;

3 is a structural block diagram of an operating device according to a second embodiment of the present invention;

4 is a schematic flow chart of a location indication method according to a third embodiment of the present invention;

FIG. 5 is a structural block diagram of a display device according to a fourth embodiment of the present invention; FIG.

6 is a schematic flow chart of a location indication method according to a fifth embodiment of the present invention;

FIG. 7 is a structural block diagram of a position indicating device according to a sixth embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic flowchart of a location indication method according to a first embodiment of the present invention, including:

S11, the operating device instructs an arbitrary position on the display screen of the display device from the non-contact position, and photographs the pointed position to obtain an image forming screen; wherein the display device is provided with a position identifier;

S12. The operating device identifies the location identifier in an imaging screen at a current time;

S13. When the operation device recognizes the position identifier in the imaging image of the current time, according to the coordinates of the position identifier in the imaging picture at the current time, the operation device acquires the current position indication position on the display screen. coordinate;

S14, when the operation device does not recognize the position identifier in the imaging picture of the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device between the X time and the current time Motion displacement, obtaining coordinates of the indicated position on the display screen at the current time; wherein, the X time refers to the time at which the position identifier can be recognized last time;

S15. The operating device transmits the coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.

The position identifier is any object that can be recognized by the operating device. In this embodiment, the position identifier is an infrared LED.

The position identifier may be disposed at any position of the display device, such as a frame or a display screen of the display screen; preferably, the position identifier is disposed at a center point of the display screen.

Further, in order to comply with the user's usage habits, the operating device can be processed into a pen shape.

In step S11, the operation device specifically performs photographing by a camera provided on the main body of the operation device. The camera can be placed at the front or side of the operating device.

In step S15, the operating device preferably transmits the coordinates of the indicated position on the display screen at the current time to the display device by wireless, so that the display device performs the indicated position on the display screen. Display processing. The display processing performed by the display device may be a display spot or an aperture, which is not limited in this embodiment.

In order to understand the working principle of this embodiment, please refer to FIG. 2 at the same time. 2 is a schematic diagram showing the state of the current time display screen and the imaging screen. In FIG. 2, a solid line frame indicates a display screen, and a broken line frame indicates an image forming screen. A denotes the coordinates of the position marker in the imaged picture, and B denotes the coordinate indicating the position in the display screen. The ultimate goal of this embodiment is to obtain the specific coordinates of B and display it by the display device to indicate the position indicated by the operating device.

In this embodiment, step S13 includes:

The operating device acquires coordinates (x1, y1) in the imaging picture of the current time position when the position identifier is recognized in the imaging picture at the current time;

The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.

L2/L1 and W2/W1 actually convert the coordinate system of the imaging picture into the long coefficient and the wide coefficient of the coordinate system of the display screen. Therefore, the coordinate x2 indicating the position in the x direction of the display screen can be obtained according to the long coefficient and x1. According to the width coefficient and y2, the y-direction coordinate y2 indicating the position on the display screen can be obtained.

In the above manner, when the position marker is recognized in the imaging screen at the current time, the coordinates of the current time indication position in the display screen can be calculated. However, if the position marker is not recognized in the image frame of the current time, the conventional method cannot perform calculation, and the embodiment adopts the following manner.

In an optional implementation, step S14 includes:

When the operation device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) of the position identifier in the imaging picture at time X and the operation device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

In step S13, according to the coordinate (x1', y1') of the position identifier that was acquired last time in the imaging picture and the motion displacement (Δx, the time from the time when the position identifier was last recognized to the current time. Δy), the virtual coordinates (x1'+Δx, y1'+Δy) of the position marker in the imaging picture can be calculated. Converting the coordinate system of the imaged image to the coordinates of the display screen by the same virtual coordinate The method calculates the coordinates (x2, y2) of the current time indication position in the display screen.

Therefore, in step S14, even if the position marker does not exist in the image forming screen at the current time, the coordinates of the pointing position in the display screen can be calculated, overcoming the defect that the conventional blind spot cannot be normally indicated due to the shooting blind spot.

Preferably, the location indication method further includes:

When the operating device is restarted or the duration between the X time and the current time exceeds a preset duration threshold, the operating device clears the storage of the coordinates of the position identifier in the imaged image when it is last recognized. data;

The operating device does not recognize the position identifier in the imaging picture at the current time, and cannot find an invalid coordinate when the position identifier stores the data of the coordinates in the imaging picture when it is last recognized. As the current time, the coordinates of the indicated position on the display screen are prompted and the user is prompted to adjust the position of the operating device until the operating device recognizes the position marker again in the imaging screen.

The display device receives the coordinates of the indicated position on the display screen at the current time, and if it is a valid coordinate, the display is normally performed, and if it is an invalid coordinate, the display is not performed.

The coordinates of the current time indication position in the display screen are calculated only according to the coordinates of the position identifier that was acquired last time in the imaging picture and the motion displacement from the time when the position identifier was last recognized to the current time. Suitable for short-term implementation. If the operating device restarts or the duration between the X time and the current time exceeds the preset duration threshold, a large error may be caused, so it is necessary to calibrate the coordinates of the last acquired position marker in the imaging screen.

Therefore, when the operating device is restarted or the duration between the X time and the current time exceeds the preset duration threshold, and the position identifier is not recognized in the imaging picture at the current time, the display device will not display the indicated position. . The user needs to readjust the operating device so that the operating device recognizes the position marker again in the imaging screen, and the display device can display the indicated position normally.

In order to perform the position indication method of the first embodiment, the embodiment of the invention further provides an operation device.

Referring to FIG. 3, it is a structural block diagram of an operating device according to a second embodiment of the present invention, which includes:

The photographing module 11 is configured to instruct an arbitrary position of the display screen of the display device from the non-contact position, and photograph the indicated position to obtain an image forming screen; wherein the display device is provided with a position identifier;

The identifier identifying module 12 is configured to identify the location identifier in an imaging screen at a current time;

The first coordinate acquiring module 13 is configured to: when the location identifier is recognized in the imaging image of the current time, obtain the current location indication position according to the coordinates of the location identifier in the imaging image of the current time Describe the coordinates on the display screen;

The second coordinate acquiring module 14 is configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the operation device at time X a motion displacement between the current moments, obtaining coordinates of the indicated position on the display screen at the current time; wherein the X moment refers to a time at which the position identifier can be recognized last time;

The coordinate sending module 15 is configured to send coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.

Preferably, the first coordinate acquisition module 13 includes:

a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

a first coordinate calculation unit, configured to calculate, according to coordinates (x1, y1), coordinates of the indicated position on the display screen at the current time (x2, y2); wherein x2=x1·L2/L1, y2=y1·W2/W1; L1 is the length of the imaging picture, L2 is the length of the display picture, and W1 is the width of the imaging picture , W2 is the width of the imaged picture.

Preferably, the second coordinate acquisition module 14 includes:

a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y2′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the operating device further comprises:

a coordinate data clearing module, configured to clear a coordinate of the position identifier in the imaged image when the position identifier is last recognized after the operating device is restarted or when the duration between the X time and the current time exceeds a preset duration threshold Storing data;

a third coordinate acquiring module, configured to not recognize the position identifier in the imaging picture at the current time, and cannot find the stored data of the coordinates of the position identifier in the imaging picture when the position identifier is last recognized Obtaining an invalid coordinate as the coordinate of the indicated position on the display screen at the current time, and prompting the user to adjust the position of the operating device until the operating device recognizes the position identifier again in the imaging screen.

Preferably, the position identifier is an infrared LED lamp.

Preferably, the coordinate sending module 15 is configured to send, by using wireless, coordinates of the indicated position on the display screen at a current time to the display device, so that the display device is located on the display screen. The indication position is displayed for display processing.

It should be noted that the operation device provided by the embodiment of the present invention is used to perform all the method steps of the position indication method of the first embodiment, and the working principle and the beneficial effects of the two are corresponding to each other, and thus are not described again.

Referring to FIG. 4, it is a schematic flowchart of a location indication method according to a third embodiment of the present invention, which includes:

S31. The display device acquires an imaging screen sent by the operating device. The imaging screen is obtained by the operating device when the operating device indicates an arbitrary position on the display screen of the display device from a non-contact position; The display device is provided with a position identifier;

S32. The display device identifies the location identifier in an imaging screen at a current time.

S33, when the display device recognizes the location identifier in the imaging image of the current time, according to the coordinates of the location identifier in the imaging image of the current time, acquire the current location indication position on the display screen. coordinate;

S34. When the display device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device between the X time and the current time. Motion displacement, obtaining coordinates of the indicated position on the display screen at the current time; wherein, the X time refers to the time at which the position identifier can be recognized last time;

S35. The display device performs display processing on the indication position on the display screen according to coordinates of the indication position on the display screen at the current time.

The position identifier is any object that can be recognized by the operating device. In this embodiment, the position identifier is an infrared LED.

The position identifier may be disposed at any position of the display device, such as a frame or a display screen of the display screen; preferably, the location The position marker is set at a center point of the display screen.

Further, in order to comply with the user's usage habits, the operating device can be processed into a pen shape.

In step S31, the operation device specifically performs photographing by a camera provided on the main body of the operation device. The camera can be placed at the front or side of the operating device. The operating device preferably transmits the imaged picture of the current time to the display device by wireless.

In the step S35, the display device may perform a display process on the indication position, which may be a display spot or an aperture, which is not limited in this embodiment.

Preferably, when the display device recognizes the location identifier in the imaging picture of the current time, according to the coordinates of the position identifier in the imaging picture at the current time, the current position indication position is obtained in the display. The coordinates on the screen, including:

The display device acquires the coordinates (x1, y1) of the position identifier in the imaging picture at the current time when the position identifier is recognized in the imaging picture at the current time;

The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.

Preferably, when the display device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at the X time and the current time The motion displacement between the two is obtained, and the coordinates of the indicated position on the display screen at the current time are obtained, including:

When the display device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) in the imaging picture of the position identifier at time X and the operating device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

It should be noted that the position indication method provided by the third embodiment of the present invention is different from the position indication method provided by the first embodiment of the present invention in that the first embodiment of the present invention is implemented by an operation device, and the third embodiment of the present invention The implementation by the display device is basically the same in the algorithm flow, and the technical problems, the working principle, and the beneficial effects to be achieved are the same, and thus will not be further described in the third embodiment of the present invention.

In order to perform a position indication method of the third embodiment described above, the fourth embodiment of the present invention further provides an operation device. As shown in FIG. 5, it is a structural block diagram of an operating device according to a fourth embodiment of the present invention, including:

An imaging screen acquiring module 31, configured to acquire an imaging screen sent by the operating device; the imaging screen is obtained by the operating device when the operating device indicates an arbitrary position on the display screen of the display device from a non-contact position Wherein the display device is provided with a position identifier;

The identifier identifying module 32 is configured to identify the location identifier in an imaging screen at a current time;

The first coordinate acquiring module 33 is configured to: when the location identifier is recognized in the imaging image of the current time, obtain the current location indication position according to the coordinates of the location identifier in the imaging image of the current time Describe the coordinates on the display screen;

a second coordinate acquiring module 34, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the operation device at time X The displacement between the current moments, the current moment Describe the coordinates of the position on the display screen; wherein the X time refers to the time when the position identifier can be recognized last time;

The display processing module 35 is configured to perform display processing on the indication position on the display screen according to the coordinates of the indicated position on the display screen at the current time.

Preferably, the first coordinate acquisition module 33 includes:

a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

a first coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinate (x1, y1); wherein x2=x1·L2/L1, y2 = y1 · W2 / W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.

Preferably, the second coordinate acquisition module 34 includes:

a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y1′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.

Preferably, the position identifier is an infrared LED lamp.

It should be noted that the display device provided by the fourth embodiment of the present invention is configured to perform all the method steps of the position indication method of the third embodiment, and the working principle and the beneficial effects of the two are in one-to-one correspondence, and thus no further description is provided. .

FIG. 6 is a schematic flowchart of a location indication method according to a fifth embodiment of the present invention, including:

S51: acquiring an imaging screen; the imaging screen is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier is disposed on the display device on;

S52. Identify the location identifier on the imaging screen at the current time;

S53, when the location identifier is recognized in the imaging picture of the current time, acquire coordinates of the indication position on the display screen at the current time according to the coordinates of the position identifier in the imaging picture at the current time;

S54, when the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the motion displacement between the X time and the current time of the operating device Obtaining a coordinate of the indicated position on the display screen at a current time; wherein the X time refers to a time at which the position identifier can be recognized last time;

S55. The indicated position is displayed on the display screen according to coordinates of the indication position on the display screen according to the current time.

It should be noted that the position indication method provided by the fifth embodiment of the present invention is different from the first embodiment and the third embodiment in that each step of the fifth embodiment of the present invention can be performed by the operation device (equivalent to the first An embodiment), or both may be performed by a display device (equivalent to the third embodiment), or one or more of the preceding steps are performed by the operating device, and one or more of the following steps are performed by the display device. For example, S51 to S53 are executed by the operating device, and S54 and S55 are executed by the display device. Therefore, the technical problems, the working principle, and the beneficial effects to be achieved by the three embodiments are the same, and thus will not be described again in the fifth embodiment of the present invention.

In order to perform a position indication method of the fifth embodiment described above, the sixth embodiment of the present invention further provides a position indication device.

FIG. 7 is a structural block diagram of a position indicating apparatus according to a sixth embodiment of the present invention, which includes:

An imaging picture acquiring module 51, configured to acquire an imaging picture; the imaging picture is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier Provided on the display device;

The identifier identifying module 52 is configured to identify the location identifier on the imaging screen at the current time;

The first coordinate acquiring module 53 is configured to: when the location identifier is recognized in the imaging image of the current time, obtain the current location indication position according to the coordinates of the location identifier in the imaging image of the current time Describe the coordinates on the display screen;

The second coordinate acquiring module 54 is configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the operation device at time X a motion displacement between the current moments, obtaining coordinates of the indicated position on the display screen at the current time; wherein the X moment refers to a time at which the position identifier can be recognized last time;

The display control module 55 is configured to control the indication position to be displayed on the display screen according to coordinates of the indication position on the display screen at the current time.

The position indicating device provided by the sixth embodiment of the present invention is for performing the position indicating method provided by the fifth embodiment. All the modules in the position indicating device may be disposed in the operating device, or are disposed in the display device, or some modules are disposed in the operating device, and some modules are disposed in the display device. For example, the imaging screen acquisition module 51, the marker recognition module 52, and the first coordinate acquisition module 53 are disposed in the operation device, and the second coordinate acquisition module 54 and the display control module 55 are disposed in the display device.

Compared with the prior art, an embodiment of the present invention provides a position indication method, an operation device, a display device, and a position indication device, wherein the position indication method includes the operation device from a non-contact position. Uppointing an arbitrary position on the display screen of the display device, and photographing the pointed position to obtain an imaged image; the operating device identifies the position marker in the imaged image at the current time; the operating device recognizes in the imaged image at the current time When the location identifier is obtained, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time; the operation device identifies the image in the current time When the location identifier is not available, according to the coordinates of the location identifier in the imaging picture at time X and the motion displacement between the X time and the current time of the operating device, the current time indication position is obtained. Describe the coordinates on the screen; the operating device sets the indicated position at the current time in the display Coordinates on the screen of the display device to transmit, to cause said display means on the display screen of a display process of the indication position. The method adopts an operation device with a camera function, instead of a laser pointer, which does not cause damage or harm to the human eye, and can be applied to any display device;

With the method, the coordinates of the indication position in the display screen can be calculated regardless of whether the position marker is recognized on the imaging picture at the current time, and the defect that cannot be normally indicated due to the shooting blind spot in the prior art is overcome.

The above disclosure is only a preferred embodiment of the present invention, and of course, the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the present invention. The equivalent changes required are still within the scope of the invention.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Claims (22)

1. A location indication method, comprising:

   The operating device indicates an arbitrary position on the display screen of the display device from the non-contact position, and photographs the pointed position to obtain an image forming screen; wherein the display device is provided with a position identifier;

   The operating device identifies the location identifier in an imaging screen at a current time;

   When the operation device recognizes the position identifier in the imaging screen of the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

   When the operation device does not recognize the position identifier in the imaging picture at the current time, the coordinates of the position indicator in the imaging picture at time X and the motion displacement between the X time and the current time of the operation device Obtaining a coordinate of the indicated position on the display screen at a current time; wherein the X time refers to a time at which the position identifier can be recognized last time;

   The operating device transmits coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.
2. A position indication method according to claim 1, wherein

   When the operation device recognizes the position identifier in the imaging picture of the current time, the operation position of the position identifier on the current time is obtained according to the coordinates of the position identifier in the imaging picture at the current time. Coordinates, including:

   The operating device acquires coordinates (x1, y1) in the imaging picture of the current time position when the position identifier is recognized in the imaging picture at the current time;

   The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.
3. The position indicating method according to claim 2, wherein the operating device recognizes the position marker in the imaging picture at the current time, according to the position marker in the imaging picture at time X Coordinates and motion displacements between the X time and the current time of the operating device, and acquiring coordinates of the indicated position on the display screen at the current time, including:

   When the operation device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) of the position identifier in the imaging picture at time X and the operation device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

   The operating device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

   Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.
4. The position indication method according to any one of claims 1 to 3, wherein the position indication method further comprises:

   When the operating device is restarted or the duration between the X time and the current time exceeds a preset duration threshold, the operating device clears the storage of the coordinates of the position identifier in the imaged image when it is last recognized. data;

   The operating device does not recognize the location identifier in the imaging picture at the current moment, and cannot find the location identifier at the end Obtaining an invalid coordinate as the coordinate of the indicated position on the display screen at the current time and prompting the user to adjust the position of the operating device until the operating device is again in the storage data of the coordinates in the imaging screen. The position marker is recognized in the imaged picture.
5. The position indicating method according to claim 1, wherein said position identifier is an infrared LED lamp.
6. The position indicating method according to claim 1, wherein the operating device transmits the coordinates of the indication position on the display screen at a current time to the display device by wirelessly, so that the display device Display processing is performed on the indication position on the display screen.
7. An operating device, comprising:

   a photographing module, configured to instruct an arbitrary position of a display screen of the display device from a non-contact position, and photograph the indicated position to obtain an image forming screen; wherein the display device is provided with a position identifier;

   a identifier identifying module, configured to identify the location identifier in an imaging picture at a current time;

   a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

   a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

   And a coordinate sending module configured to send coordinates of the indication position on the display screen at the current time to the display device, so that the display device performs display processing on the indication position on the display screen.
8. The operating device according to claim 7, wherein the first coordinate acquisition module comprises:

   a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

   a first coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinate (x1, y1); wherein x2=x1·L2/L1, y2 = y1 · W2 / W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the imaging picture.
9. The operating device according to claim 8, wherein the second coordinate acquisition module comprises:

   a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y1′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

   a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

   Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.
10. The operating device according to any one of claims 7 to 9, wherein the operating device further comprises:

    a coordinate data clearing module, configured to clear a coordinate of the position identifier in the imaged image when the position identifier is last recognized after the operating device is restarted or when the duration between the X time and the current time exceeds a preset duration threshold Storing data;

    a third coordinate acquiring module, configured to not recognize the position identifier in the imaging picture at the current time, and cannot find the stored data of the coordinates of the position identifier in the imaging picture when the position identifier is last recognized Obtaining an invalid coordinate as the coordinate of the indicated position on the display screen at the current time, and prompting the user to adjust the position of the operating device until the operating device recognizes the position identifier again in the imaging screen.
11. The operating device of claim 7 wherein said position indicator is an infrared LED lamp.
12. The operating device according to claim 7, wherein the coordinate sending module is configured to send, by wireless, coordinates of the indicated position on the display screen at a current time to the display device, so that the The display device performs display processing on the indication position on the display screen.
13. A location indication method, comprising:

    The display device acquires an imaging screen transmitted by the operation device; the imaging screen is obtained by the operation device when the operation device indicates an arbitrary position on the display screen of the display device from a non-contact position; wherein the display a position identifier is disposed on the device;

    The display device identifies the location identifier in an imaging picture at a current time;

    When the display device recognizes the location identifier in the imaging picture of the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

    When the display device does not recognize the position identifier in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the motion displacement between the X time and the current time of the operating device Obtaining a coordinate of the indicated position on the display screen at a current time; wherein the X time refers to a time at which the position identifier can be recognized last time;

    The display device performs display processing on the indication position on the display screen based on the coordinates of the indicated position on the display screen at the current time.
14. A position indication method according to claim 13, wherein

    When the display device recognizes the location identifier in the imaging picture at the current time, according to the coordinates of the location identifier in the imaging picture at the current time, the display position of the current time is obtained on the display screen. Coordinates, including:

    The display device acquires the coordinates (x1, y1) of the position identifier in the imaging picture at the current time when the position identifier is recognized in the imaging picture at the current time;

    The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1, y1); wherein x2=x1·L2/L1, y2=y1·W2 /W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.
15. The position indication method according to claim 14, wherein the display device does not recognize the position identifier in the imaging picture at the current time, according to the position indicator in the imaging picture at time X Coordinates and motion displacements between the X time and the current time of the operating device, and acquiring coordinates of the indicated position on the display screen at the current time, including:

    When the display device does not recognize the position identifier in the imaging picture at the current time, acquire the coordinates (x1′, y1′) in the imaging picture of the position identifier at time X and the operating device is at the X The motion displacement between the moment and the current moment (Δx, Δy);

    The display device calculates coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

    Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.
16. The position indicating method according to claim 13, wherein said position identifier is an infrared LED lamp.
17. A display device, comprising:

    An imaging picture acquiring module, configured to acquire an imaging picture sent by the operating device; the imaging picture is obtained by the operating device when the operating device indicates an arbitrary position on the display screen of the display device from a non-contact position; Wherein the display device is provided with a position identifier;

    a identifier identifying module, configured to identify the location identifier in an imaging picture at a current time;

    a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

    a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

    And a display processing module, configured to perform display processing on the indication position on the display screen according to coordinates of the indicated position on the display screen at the current time.
18. A display device according to claim 17, wherein

    The first coordinate acquisition module includes:

    a photographing coordinate acquiring unit, configured to acquire coordinates (x1, y1) of the position identifier in an imaging picture at a current moment when the position identifier is recognized in an imaging picture at a current time;

    a first coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinate (x1, y1); wherein x2=x1·L2/L1, y2 = y1 · W2 / W1; L1 is the length of the imaging picture, L2 is the length of the display picture, W1 is the width of the imaging picture, and W2 is the width of the display picture.
19. A position indication method according to claim 18, wherein

    The second coordinate acquisition module includes:

    a coordinate displacement acquiring unit, configured to acquire coordinates (x1′, y1′) in the imaging image of the position identifier at time X and the operation when the position identifier is not recognized in the imaging picture at the current time The motion displacement (Δx, Δy) between the X moment and the current moment of the device;

    a second coordinate calculation unit, configured to calculate coordinates (x2, y2) of the indicated position on the display screen according to the coordinates (x1', y1') and the motion displacement (Δx, Δy);

    Here, x2 = (x1' + Δx) · L2 / L1, y2 = (y1' + Δy) · W2 / W1.
20. A display device according to claim 17, wherein said position marker is an infrared LED lamp.
21. A location indication method, comprising:

    Acquiring an imaging picture; the imaging picture is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier is disposed on the display device;

    Identifying the location marker at the current imaging screen;

    When the location identifier is recognized in the imaging picture at the current time, the coordinates of the indication position on the display screen at the current time are acquired according to the coordinates of the position identifier in the imaging picture at the current time;

    When the position identifier is not recognized in the imaging picture at the current time, according to the coordinate of the position identifier in the imaging picture at time X and the motion displacement of the operating device between the X time and the current time, The current position indicates the coordinates of the position on the display screen; wherein the X time refers to the time when the position identifier can be recognized last time;

    The indicated position is displayed on the display screen according to coordinates of the indicated position on the display screen at the current time.
22. A position indicating device, comprising:

    An imaging picture acquiring module, configured to acquire an imaging picture; the imaging picture is obtained by the operating device when instructing an arbitrary position on the display screen of the display device from a non-contact position; wherein the position identifier is set On the display device;

    a identifier identifying module, configured to identify the location identifier at the current imaging screen;

    a first coordinate acquiring module, configured to: when the location identifier is recognized in the imaging picture at the current time, acquire the current time indication position according to coordinates of the position identifier in the imaging picture at the current time Display the coordinates on the screen;

    a second coordinate acquiring module, configured to: when the position identifier is not recognized in the imaging picture at the current time, according to the coordinates of the position identifier in the imaging picture at time X and the operation device at time X and current a motion displacement between the moments, obtaining coordinates of the indicated position on the display screen at the current moment; wherein the X moment refers to a time at which the position identifier can be recognized last time;

    And a display control module, configured to control the indication position to be displayed on the display screen according to coordinates of the indicated position on the display screen at the current time.

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