CN103902124B - 3D hologram interaction systems based on track identification and control method thereof - Google Patents

Abstract

The invention discloses a three-dimensional holographic interactive system based on trajectory recognition and a control method thereof. The control method includes: S1, real-time detection of capacitance changes of a touch screen, thereby identifying touch trajectories; S2, after analyzing the identified touch trajectories, Obtain corresponding control instructions; S3. According to the obtained control instructions, control the three-dimensional holographic projection object to perform corresponding actions. The present invention can detect any touch track of the user and judge and analyze it, so as to convert it into a control instruction, and control the three-dimensional holographic projection object to perform an action corresponding to the touch track, so that the user can interact with the holographic projection, and can be widely used in various fields. In a holographic projection system.

Description

Three-dimensional holographic interactive system based on trajectory recognition and its control method

technical field

The invention relates to the field of control of holographic interactive systems, in particular to a three-dimensional holographic interactive system based on trajectory recognition and a control method thereof.

Background technique

With the development of society and the advancement of technology, at various commercial product exhibitions, we often see various sales counters, advertising billboards and various advertising display boxes. The beautiful image of the product is displayed in front of the visitors. At present, most of the holographic projection display devices used to display products are box-type structures. The display planes are single-sided, double-sided, three-sided or four-sided, and the display methods mainly include the situation where the image is facing up or facing down.

In order for visitors to better understand products, it is generally necessary for visitors to interact with display equipment. Patent CN101790105A discloses a holographic interactive system and its construction method. The system uses a control device capable of executing computer codes to Receive and process one or more state physical quantities from the solid model controller, then generate corresponding image data and send it to the image display device, and display the virtual image related to the change of the physical quantity of the solid model controller through the stereoscopic display system, the The system provides a device capable of presenting stereoscopic images and having high interactivity for the existing exhibition market. However, the interaction embodied by this device is actually only equivalent to the real-time display of interactive changes on the physical model controller, not the real interaction with the holographic projection.

Generally speaking, the interaction with holographic projection proposed in the current technology is generally based on the overall control of the interface, such as power-on, power-off, image replacement and other operations, and cannot manipulate the displayed 3D information according to the projected content. The current Holographic projection display, when visitors need to observe images from different angles of the same object, they need to move to different angles to observe, instead of interacting with the system to achieve observation from different angles, the display form is single, the friendliness is poor, and due to observation Due to the problem of angle, visitors cannot observe all angles of the projected image, so they cannot observe comprehensively, and cannot achieve the purpose of interacting with the holographic projection system.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a three-dimensional holographic interactive system based on trajectory recognition. Another object of the present invention is to provide a control method for a three-dimensional holographic interactive system based on trajectory recognition.

The technical solution adopted by the present invention to solve its technical problems is:

A control method for a three-dimensional holographic interactive system based on trajectory recognition, comprising:

S1. Real-time detection of the capacitance change of the touch screen to identify the touch track;

S2. Obtain corresponding control instructions after analyzing the identified touch track;

S3. Control the three-dimensional holographic projection object to perform corresponding actions according to the obtained control instruction.

Further, the step S1 includes:

S11, real-time detection of capacitance changes of the touch screen, using a clustering method to determine the position of the touch point;

S12. Determine whether the touch screen is a single-point touch or a multi-point touch. If it is a single-point touch, then execute step S13, otherwise execute step S14;

S13. Obtain the position coordinates of the touch point, and then determine whether the position coordinates of the touch point are located on the conversion area of the three-dimensional holographic projection object on the touch screen, if so, use the position coordinates of the touch point obtained in real time as the touch track and end, otherwise directly Finish;

S14. Obtain the position coordinates of multiple touch points in real time, and judge whether there is a fixed point according to the position coordinates of multiple touch points obtained at two or more different times. If so, execute step S15, otherwise execute step S16;

S15. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same time, and use the touch point farthest from the fixed point as the relative touch point, and then calculate the distance between two adjacent time points Relative movement direction and movement range between touch points, and end it as a touch track;

S16. Obtain the motion direction between the multiple touch points at two adjacent time points as a touch track.

Further, the step S11 includes:

S111, real-time detection of the capacitance change of the touch screen, obtain the real-time capacitance change value of each channel of the touch screen, and simultaneously set the capacitance change value smaller than the change threshold to zero, and establish according to the capacitance change value of the obtained X channel and Y channel of the touch screen respectively sequence of changing values;

S112. Calculate the change trend sequence of the X channel and the Y channel according to the following formula:

In the above formula, j=1,2,3,...j _max , and

Wherein, i and j are both natural numbers, j _max represents the total number of X channels or Y channels of the touch screen, C[j] represents the jth element of the change value sequence, and CC[j] represents the jth element of the change trend sequence;

S113. Combining the following formulas to calculate the difference sequence of the X channel and the Y channel respectively:

CCC[j]=CC[j+1]-CC[j]

Among them, CCC[j] represents the jth element of the difference sequence, when j=j _max , let CC[j+1]=0;

S114. Determine the position of the touch point according to the sequence number of the element whose element value is -2 in the obtained difference sequence of the X channel and the difference sequence of the Y channel.

Further, in the step S14, according to the position coordinates of multiple touch points obtained at two or more different times, it is judged whether there is a fixed point, which is specifically:

The position coordinates of multiple touch points obtained at two or more different times are compared one by one, and if the difference in abscissa and ordinate of the two touch points obtained at different times is smaller than a preset threshold, then The two touch points are judged as fixed points, and the position coordinates of any one of the touched points are selected as the position coordinates of the fixed point.

Further, the step S15 includes:

S151. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same moment, and use a touch point farthest from the fixed point as a relative touch point;

S152. According to the position coordinates of the relative touch points at two adjacent moments and the position coordinates of the fixed point, calculate the rotation direction and rotation angle of the two relative touch points relative to the fixed point, that is, obtain the relative touch points at two adjacent moments The direction and range of movement between the points, and end it as a touch track.

Further, the step S16 is specifically:

Judging whether the multiple touch points at two adjacent moments move relatively close or far away, if so, determine that the touch track is valid, and obtain its relative motion trend as the touch track, otherwise end.

Another technical solution adopted by the present invention to solve its technical problems is:

A trajectory recognition-based three-dimensional holographic interactive system applying the control method in claim 1, comprising a control cabinet, a touch screen, a planar display source for providing a three-dimensional holographic stereoscopic image, for reflecting images provided by the planar display source, and A holographic imaging panel for phantom imaging and a controller for implementing the control method of the three-dimensional holographic interactive system based on trajectory recognition in claim 1;

The touch screen is formed by a combination of transparent capacitive touch film and transparent glass, and both the touch screen and the plane display source are connected to a controller, and the controller is installed in a control cabinet;

A cube-shaped exhibition room is arranged above the control cabinet, the plane display source is horizontally arranged on the bottom surface of the exhibition room, and the holographic imaging board is installed on the upper side of the plane display source and forms a pattern with the upper surface of the plane display source. 45 degree angle, the touch screen is arranged on the front side of the holographic imaging plate and the inner side of the touch screen is at a 45 degree angle to the holographic imaging plate, and the touch screen constitutes a side of the display room.

The beneficial effects of the present invention are: the control method of the three-dimensional holographic interactive system based on trajectory recognition of the present invention detects the capacitance change of the touch screen in real time, then identifies the touch trajectory, obtains the corresponding control instruction after analysis, and then controls the The three-dimensional holographic projection object performs the corresponding action. This method can detect any touch track of the user and judge and analyze it, so as to convert it into a control command, and control the three-dimensional holographic projection object to perform the action corresponding to the touch track, so that the user and the holographic Interactive projection.

Another beneficial effect of the present invention is: a three-dimensional holographic interactive system based on trajectory recognition of the present invention, including a control cabinet, a touch screen, a plane display source, a holographic imaging board and a controller, and a cube-shaped display is arranged above the control cabinet room, the plane display source is horizontally arranged on the bottom surface of the exhibition room, the holographic imaging plate is installed on the upper side of the plane display source and forms an angle of 45 degrees with the upper surface of the plane display source, the touch screen is arranged on the front side of the holographic imaging plate and The inner side of the touch screen is at an angle of 45 degrees to the holographic imaging plate. The touch screen constitutes one side of the display room. The controller can detect the touch track on the touch screen to control the three-dimensional holographic projection of the image provided by the plane display source to perform the same as the touch track. Therefore, the user can realize the interaction with the holographic projection by performing various touch operations on the touch screen of the system, which is easy to operate and highly friendly to the system.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Fig. 1 is a schematic flow chart of a control method of a three-dimensional holographic interactive system based on trajectory recognition according to the present invention;

Fig. 2 is a first schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 3 is a second schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 4 is a third schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 5 is a fourth schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 6 is a fifth schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 7 is a sixth schematic diagram of track recognition in Embodiment 1 of the present invention;

Fig. 8 is a schematic structural diagram of a three-dimensional holographic interactive system based on trajectory recognition according to the present invention;

FIG. 9 is a schematic diagram of the principle of a three-dimensional holographic interactive system based on trajectory recognition in FIG. 8 .

detailed description

Referring to Fig. 1, the present invention provides a control method for a three-dimensional holographic interactive system based on trajectory recognition, including:

S1. Real-time detection of the capacitance change of the touch screen to identify the touch track;

S2. Obtain corresponding control instructions after analyzing the identified touch track;

S3. Control the three-dimensional holographic projection object to perform corresponding actions according to the obtained control instruction.

Further as a preferred embodiment, the step S1 includes:

S11, real-time detection of capacitance changes of the touch screen, using a clustering method to determine the position of the touch point;

S12. Determine whether the touch screen is a single-point touch or a multi-point touch. If it is a single-point touch, then execute step S13, otherwise execute step S14;

S13. Obtain the position coordinates of the touch point, and then determine whether the position coordinates of the touch point are located on the conversion area of the three-dimensional holographic projection object on the touch screen, if so, use the position coordinates of the touch point obtained in real time as the touch track and end, otherwise directly Finish;

S14. Obtain the position coordinates of multiple touch points in real time, and judge whether there is a fixed point according to the position coordinates of multiple touch points obtained at two or more different times. If so, execute step S15, otherwise execute step S16;

S15. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same time, and use the touch point farthest from the fixed point as the relative touch point, and then calculate the distance between two adjacent time points Relative movement direction and movement range between touch points, and end it as a touch track;

S16. Obtain the motion direction between the multiple touch points at two adjacent time points as a touch track.

Further as a preferred implementation manner, the step S11 includes:

S111, real-time detection of the capacitance change of the touch screen, obtain the real-time capacitance change value of each channel of the touch screen, and simultaneously set the capacitance change value smaller than the change threshold to zero, and establish according to the capacitance change value of the obtained X channel and Y channel of the touch screen respectively sequence of changing values;

S112. Calculate the change trend sequence of the X channel and the Y channel according to the following formula:

In the above formula, j=1,2,3,...j _max , and

Wherein, i and j are both natural numbers, j _max represents the total number of X channels or Y channels of the touch screen, C[j] represents the jth element of the change value sequence, and CC[j] represents the jth element of the change trend sequence;

S113. Combining the following formulas to calculate the difference sequence of the X channel and the Y channel respectively:

CCC[j]=CC[j+1]-CC[j]

Among them, CCC[j] represents the jth element of the difference sequence, when j=j _max , let CC[j+1]=0;

S114. Determine the position of the touch point according to the sequence number of the element whose element value is -2 in the obtained difference sequence of the X channel and the difference sequence of the Y channel.

Further as a preferred embodiment, in the step S14, according to the position coordinates of multiple touch points obtained at two or more different times, it is judged whether there is a fixed point, which is specifically:

The position coordinates of multiple touch points obtained at two or more different times are compared one by one, and if the difference in abscissa and ordinate of the two touch points obtained at different times is smaller than a preset threshold, then The two touch points are judged as fixed points, and the position coordinates of any one of the touched points are selected as the position coordinates of the fixed point.

Further as a preferred implementation manner, the step S15 includes:

S151. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same moment, and use a touch point farthest from the fixed point as a relative touch point;

S152. According to the position coordinates of the relative touch points at two adjacent moments and the position coordinates of the fixed point, calculate the rotation direction and rotation angle of the two relative touch points relative to the fixed point, that is, obtain the relative touch points at two adjacent moments The direction and range of movement between the points, and end it as a touch track.

Further as a preferred embodiment, the step S16 is specifically:

Judging whether multiple touch points at two adjacent moments move relatively close or relatively far away, if so, determine that the touch track is valid, and obtain its relative motion trend as the touch track, otherwise end.

The present invention also provides a trajectory recognition-based three-dimensional holographic interactive system applying the control method in claim 1, including a control cabinet, a touch screen, a plane display source for providing a three-dimensional holographic stereoscopic image, and a plane display source for providing A holographic imaging plate for reflection and phantom imaging of images and a controller for implementing the control method of the three-dimensional holographic interactive system based on trajectory recognition in claim 1;

The touch screen is formed by a combination of transparent capacitive touch film and transparent glass, and both the touch screen and the plane display source are connected to a controller, and the controller is installed in a control cabinet;

A cube-shaped exhibition room is arranged above the control cabinet, the plane display source is horizontally arranged on the bottom surface of the exhibition room, and the holographic imaging board is installed on the upper side of the plane display source and forms a pattern with the upper surface of the plane display source. 45 degree angle, the touch screen is arranged on the front side of the holographic imaging plate and the inner side of the touch screen is at a 45 degree angle to the holographic imaging plate, and the touch screen constitutes a side of the display room.

The present invention will be further described below in combination with specific embodiments.

Embodiment one

A control method for a three-dimensional holographic interactive system based on trajectory recognition, comprising:

S1. Detect the capacitance change of the touch screen in real time, so as to identify the touch track, including:

S11. Detect the capacitance change of the touch screen in real time, and determine the position of the touch point by using a clustering method. This step includes the following sub-steps:

S111, real-time detection of the capacitance change of the touch screen, obtain the real-time capacitance change value of each channel of the touch screen, and simultaneously set the capacitance change value smaller than the change threshold to zero, and establish according to the capacitance change value of the obtained X channel and Y channel of the touch screen respectively sequence of changing values;

S112. Calculate the change trend sequence of the X channel and the Y channel according to the following formula:

In the above formula, j=1,2,3,...j _max , and

Wherein, i and j are both natural numbers, j _max represents the total number of X channels or Y channels of the touch screen, C[j] represents the jth element of the change value sequence, and CC[j] represents the jth element of the change trend sequence;

S113. Combining the following formulas to calculate the difference sequence of the X channel and the Y channel respectively:

CCC[j]=CC[j+1]-CC[j]

Among them, CCC[j] represents the jth element of the difference sequence, when j=j _max , let CC[j+1]=0;

S114. Determine the position of the touch point according to the serial number of the element whose element value is -2 in the obtained difference sequence of the X channel and the difference sequence of the Y channel;

Here we take the Y channel as an example to give a specific example. Consider the case of two-point touch, assuming that the total number of Y channels j _max is 10, the real-time capacitance change value of each channel is {1, 2, 43, 22, 3, 15, 52, 59, 12, 5}, and the change threshold is 20, then the change value sequence of the Y channel can be obtained as C[j]={0, 0, 43, 22, 0, 0, 52, 59, 0, 0} , where j=1,2,3...,10, substitute the change value sequence of the Y channel into the formula of step S112, and calculate the change trend sequence of the Y channel as CC[j]={0,0,1,- 1, -1, 0, 1, 1, -1, 0}, and then calculate according to the formula in step S113, the difference sequence of the Y channel can be obtained as CCC[j]={0, 1, -2, 0, 1, 1, 0, -2, 1, 0}, therefore, the serial number of the element whose element value is -2 is 3 and 8, that is, the touch point is on the 3rd channel and the 8th channel of the Y channel, in the difference sequence The element value -2 means that this is the position where the maximum value appears. Combined with the change value sequence C[j] of the Y channel, it can be known that C[3]=43, C[8]=59, and the calculation is correct. Similarly, the position where the maximum value of the abscissa appears can be calculated according to the capacitance change value of the X channel, so as to determine the position of the touch point.

S12. Determine whether the touch screen is a single-point touch or a multi-point touch. If it is a single-point touch, then execute step S13, otherwise execute step S14;

S13. Obtain the position coordinates of the touch point, and then determine whether the position coordinates of the touch point are located on the conversion area of the three-dimensional holographic projection object on the touch screen, if so, use the position coordinates of the touch point obtained in real time as the touch track and end, otherwise directly End; the transformation area refers to the display area when the three-dimensional holographic projection object is transformed into a display on the touch screen;

S14. Obtain the position coordinates of a plurality of touch points in real time, and judge whether there is a fixed point according to the position coordinates of the plurality of touch points obtained at two or more different times. If so, execute step S15, otherwise execute step S16;

Specifically, according to the position coordinates of the plurality of touch points obtained at two or more different times, it is judged whether there is a fixed point, which specifically includes: comparing the position coordinates of the plurality of touch points obtained at two or more different times one by one. Yes, if the abscissa difference and ordinate difference of the two touch points obtained at different times are both smaller than the preset threshold, then it is judged that the two touch points are fixed points, and the position coordinates of any one of the touch points are selected Position coordinates as a fixed point;

S15. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same time, and use the touch point farthest from the fixed point as the relative touch point, and then calculate the distance between two adjacent time points Relative movement direction and movement range between touch points, and end it as a touch track, including:

S151. Calculate the distance from other touch points except the fixed point to the fixed point among the multiple touch points at the same moment, and use a touch point farthest from the fixed point as a relative touch point;

S152. According to the position coordinates of the relative touch points at two adjacent moments and the position coordinates of the fixed point, calculate the rotation direction and rotation angle of the two relative touch points relative to the fixed point, that is, obtain the relative touch points at two adjacent moments The direction and range of movement between points, and end it as a touch track;

Considering the case of two-point touch here, using the method mentioned in step S11, 8 sets of coordinate values will be obtained at two consecutive moments, as shown in Figure 2, assuming that the four touch points obtained at the first moment are A, A1, A2 , O, the four touch points obtained at the second moment are B, B1, B2, O, because there is the same point O, so O is the fixed point mentioned in step S14, and the position coordinates of the fixed point are the coordinates of point O ( x _O , y _O ); referring to Figure 3, according to the position coordinates of A, A1, A2, use the following formula to calculate the distance between A, A1, A2 and the fixed point:

$\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; OA</span>}<span\; class="notranslate">\; =</span>\sqrt{{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}\\ \mathrm{<span\; class="notranslate">\; OA</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; =</span>\sqrt{{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}\\ \mathrm{<span\; class="notranslate">\; OA</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; =</span>\sqrt{{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}\end{array}\right.$

According to Fig. 3, it can be calculated that OA>OA1 and OA>OA2, so point A is the relative touch point at the first moment, it should be noted that, according to the method of step S11, 4 touch points will be obtained at the same moment, Only two of them are correct touch points, and this method can extract the correct touch points, which are defined as relative touch points here. Similarly, point B obtained after calculation is the relative touch point at the second moment, so according to the position coordinates of O, A, and B, a triangle as shown in Figure 4 can be formed, so A, B can be obtained according to the following formula The angle of rotation of the point relative to the fixed point O:

$\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; \&theta;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; OB</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; OA</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; AB</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; OB</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; OA</span>}}$

Because the position coordinates of the three points O, A, and B are known, the rotation direction of points A and B relative to the fixed point O can also be quickly obtained, that is, the relative touch point A of the adjacent first and second moments can be obtained , and the direction and range of motion between B, so it is taken as the touch track.

S16. Obtain the movement direction between multiple touch points at two adjacent moments as the touch trajectory: judge whether the multiple touch points at two adjacent moments move relatively close or move relatively far away, and if so, determine the touch If the trajectory is valid, obtain its relative motion trend as the touch trajectory, otherwise end;

When the touch condition of the touch screen is multi-touch and there is no fixed point, it is generally a zoom movement, and multiple touch points perform stretching and approaching actions on a straight line. Also take two-point touch as an example, and obtain 8 points according to the method of step S11. A set of coordinate values, judge whether the 8 sets of coordinate values are evenly distributed on two straight lines, that is, calculate the angle between each set of coordinate values and the coordinate axis, if there are 4 included angles that are the same, it is judged as a zoom movement, here, define the upper left corner is the origin of the coordinates, and calculate the distance between the two touch points detected at two moments, that is, the distance between the two touch points detected in the two touches. If the distance between the two touch points decreases during the two touches, it is judged as a zoom-out operation, otherwise if If the distance increases, it is judged as a zoom-in operation.

When the touch track point is as shown in Figure 5, calculate the angle between the 8 sets of coordinate values obtained at two moments and the X-axis, taking point A1 in the figure as an example, the tangent of the angle between it and the X-axis is Calculate the included angles between the 8 touch points represented by the 8 sets of coordinate values and the X-axis, and judge whether there are 4 included angles that are the same, and at each moment, there are 2 points that have the same included angles with the X-axis, if Existence, that is, it is judged that the user performs a zoom operation, first calculate the distance between the two touch points obtained at the first moment, and then calculate the distance between the two touch points obtained at the second moment. As shown in the figure, after calculation, it is judged that the angles between the touch points A1 and B1 obtained at the first moment and the touch points A2 and B2 obtained at the second moment in the figure are the same as the X-axis. Zoom movement, and then first calculate the distance between the touch points A1 and B1 obtained at the first moment $L1=\sqrt{{(x_{A1}-x_{B1})}^2+{({\mathrm{the\; y}}_{A1}-{\mathrm{the\; y}}_{B1})}^2},$ Then calculate the distance between the touch points A2 and B2 obtained at the second moment $L2=\sqrt{{(x_{A2}-x_{B2})}^2+{({\mathrm{the\; y}}_{A2}-{\mathrm{the\; y}}_{B2})}^2},$ If L1>L2, it is judged to be a zoom-out operation, which is resolved into a control command and executed, which corresponds to controlling the proportional reduction of the holographic object. Scale up proportionally. It should be noted that in the zoom operation, it is not necessary to consider the removal of false touch points, because touch points exist symmetrically, as shown in Figure 5, because touch points C1 and D1 exist symmetrically with A1 and B1, Touch points C2 and D2 exist symmetrically with A2 and B2. Whether A1, B1, A2, and B2 are real touch points or C1, D1, C2, and D2 are real touch points, the calculated L1 and L2 remain unchanged and do not affect Judgment of shrinking and zooming in, so it is only necessary to calculate the motion trend of the four touch points on a straight line with a fixed angle to the X-axis direction.

In addition, as shown in FIG. 6 , when the touch track point moves along the X-axis direction, the vertical coordinate values of the two touch points A1 and B1 measured at the first moment are equal. y _A1 =y _B1 , and the ordinate values of the two touch points A2 and B2 are equal when measured at the second moment. y _A2 =y _B2 , and the two ordinate values obtained at the previous moment are equal to the obtained coordinate values, that is, the four touch points are on a straight line along the X direction, y _A1 =y _B1 =y _A2 =y _B2 . At this time, it is determined whether the user is controlling the 3D holographic projection object to zoom in and out, and whether to zoom in or zoom out is judged by calculation, and the distance between the two points detected at two moments is calculated respectively: the distance between A1 and B1 is $L1=\sqrt{{(x_{A1}-x_{B1})}^2+{({\mathrm{the\; y}}_{A1}-{\mathrm{the\; y}}_{B1})}^2},$ The distance between A2 and B2 is $L2=\sqrt{{(x_{A2}-x_{B2})}^2+{({\mathrm{the\; y}}_{A2}-{\mathrm{the\; y}}_{B2})}^2},$ If L1>L2, it is judged that the user performs a zoom-in operation, which is parsed into a control command and executed, which corresponds to controlling the proportional reduction of the 3D holographic projection object. If L1<L2, it is judged that the user performs a zoom-in operation, parsed into a control command and executed, which corresponds to control The three-dimensional holographic projection object is scaled up.

Similarly, as shown in FIG. 7 , when the touch track point moves along the y-axis direction, the abscissa values of the two touch points A1 and B1 measured at the first moment are equal, x _A1 =x _B1 . The ordinate values of the two touch points A2 and B2 are equal when measured at the second moment, x _A2 =x _B2 . And it is equal to the two ordinate values obtained at the previous moment, that is, the four touch points are on a straight line along the x direction, x _A1 =x _B1 =x _A2 =x _B2 . At this time, it is also judged that the user performs a zoom operation, and it is judged through calculation whether to control the three-dimensional holographic projection object to zoom in or zoom out. Similarly, the distance calculation formula is used to calculate the distance between two points detected at two moments to make a judgment.

It should be noted that Figures 2 to 7 show schematic diagrams of different touch situations, which can actually be divided into different and more detailed embodiments. Using the same symbols to represent touch points in these figures will not cause misunderstanding, so these Some touch points in the figure are represented by the same mark.

S2. After analyzing the identified touch track, obtain the corresponding control instruction; here, the corresponding relationship between the touch track and the control command is defined in advance and stored in the controller. After the touch track is recognized, it can be analyzed directly. Get the corresponding control instructions. According to the previous description, when the touch of the touch screen is a single touch, the touch track is the position coordinate of a single touch point, and the corresponding control command is generally defined as moving the three-dimensional holographic projection object to the position of the touch point; when the touch of the touch screen When the situation is multi-touch and there is a fixed point, the touch trajectory is the movement direction and movement range between the relative touch points at two adjacent moments, that is, the rotation direction and rotation angle of the two relative touch points relative to the fixed point, defined The corresponding control command is to control the three-dimensional holographic projection object to rotate according to the rotation direction and rotation angle; when the touch screen is multi-touch and there is no fixed point, it is generally a zoom operation, and the touch track at this time is between multiple touch points. The relative motion trends between them, such as approaching or moving away from each other, define the control command corresponding to the motion trend close to each other as the command to control the shrinkage of the 3D holographic projection object, and conversely, the control command corresponding to the motion trend far away from each other is to control the 3D holographic projection Instructions for zooming in on objects. It should be noted that this embodiment only lists several main touch situations that conform to the user's operating habits, and treats other touch operations as illegal operations. In fact, with the progress of society, if the user's operating habits Changes can redefine legal touch tracks, and the present invention is not limited to protecting the several touch tracks mentioned in this document.

S3. Control the three-dimensional holographic projection object to perform corresponding actions according to the obtained control instruction.

Embodiment two

Referring to Fig. 8, a trajectory recognition-based three-dimensional holographic interactive system applying the control method in Embodiment 1 includes a control cabinet 1, a touch screen 2, a plane display source 3 for providing a three-dimensional holographic stereoscopic image, and a A holographic imaging panel 4 for reflection and phantom imaging of the image provided by the planar display source and a controller for implementing the control method of the three-dimensional holographic interactive system based on trajectory recognition in Embodiment 1;

The touch screen 2 is formed by a combination of transparent capacitive touch film and transparent glass, the touch screen 2 and the plane display source 3 are connected to a controller, and the controller is installed in the control cabinet 1;

The top of the control cabinet 1 is provided with a cube-shaped display room 5, the plane display source 3 is horizontally arranged on the bottom surface of the display room 5, and the holographic imaging plate 4 is installed on the upper side of the plane display source 3 and connected to the plane. The upper surface of the display source 3 is at an angle of 45 degrees, the touch screen 2 is arranged on the front side of the holographic imaging plate 4 and the inside of the touch screen 2 is at an angle of 45 degrees with the holographic imaging plate 4, and the touch screen 2 constitutes a side of the display room 5 .

Referring to Figure 9, the holographic imaging plate 4 is installed on the upper side of the plane display source 3 and the angle θ formed with the upper surface of the plane display source 3 is 45 degrees, and the holographic imaging plate 4 is also at 45 degrees to the inner side of the touch screen 2. degree angle, the touch screen 2 is perpendicular to the plane display source 3 . As shown in the figure, when the distance on the three-dimensional holographic stereoscopic image provided by the plane display source 3 is L1, its corresponding distance to the holographic imaging plate 4 is Because the angle formed by the holographic imaging plate 4, the plane display source 3 and the touch screen 2 is 45 degrees, the distance corresponding to the touch screen is L3=L1, so operating on the touch screen 2 is actually equivalent to providing a display on the plane display source 3. Operate on the 3D holographic stereoscopic image, and the 3D holographic interactive system of this structure, the user can operate at any position on the touch screen 2, which is equivalent to operating at any position on the 3D holographic stereoscopic image provided by the plane display source 3 .

Controllers include:

The first module is used to detect the capacitance change of the touch screen in real time, thereby identifying the touch track;

The second module is configured to obtain corresponding control instructions after parsing the identified touch track;

The third module is configured to control the three-dimensional holographic projection object to perform corresponding actions according to the obtained control instructions.

For the specific functions of each module of the controller, reference may be made to the description of Embodiment 1, and repeated descriptions are not repeated here.

The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments, those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention , these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (6)

1. the control method of a 3D hologram interaction systems based on track identification, it is characterised in that comprise the following steps:

The capacitance variations of S1, in real time detection touch screen, thus identify touch track；

After S2, the touch track obtaining identification resolve, it is thus achieved that corresponding control instruction；

S3, according to obtain control instruction, control 3D hologram projected objects perform corresponding action；

Described step S1, including:

The capacitance variations of S11, in real time detection touch screen, uses clustering method to determine the position of touch point；

S12, judge that touch screen is single-touch or multiple point touching, if single-touch, then perform step S13, otherwise perform Step S14；

S13, the position coordinates of acquisition touch point, then judge whether the position coordinates of touch point is positioned at 3D hologram projected objects In conversion zone on the touchscreen, the most then the position coordinates of the touch point obtained in real time as touch track and is terminated, The most directly terminate；

The position coordinates of S14, the in real time multiple touch points of acquisition, and the multiple touch points obtained the most in the same time according to two or more Position coordinates, it may be judged whether have fixing point, if having, then perform step S15, otherwise perform step S16；

S15, calculate in multiple touch points of synchronization other touch point except fixing point in addition to the distance of fixing point, and general The farthest touch point of distance fixing point is as relative touch point, and then calculates between the relative touch point in adjacent two moment The direction of motion and motion amplitude, and as after touch track terminate；

S16, the direction of motion obtained between multiple touch points in adjacent two moment are as touch track.

The control method of 3D hologram interaction systems based on track identification the most according to claim 1, it is characterised in that Described step S11, including:

The capacitance variations of S111, in real time detection touch screen, it is thus achieved that the real-time capacitance variations value of each passage of touch screen, will simultaneously It is set to zero, respectively according to X passage and the capacitance variations value of Y passage of the touch screen obtained less than the capacitance variations value of change threshold Set up changing value sequence；

S112, calculate the variation tendency sequence of X passage and Y passage respectively according to below equation:

In above formula, j=1,2,3 ... j_max, and

Wherein, i and j is natural number, j_maxRepresenting X passage sum or the Y total number of channels of touch screen, C [j] represents changing value sequence The jth element of row, CC [j] represents the jth element of variation tendency sequence；

S113, combine below equation and calculate X passage and the sequence of differences of Y passage respectively:

CCC [j]=CC [j+1]-CC [j]

Wherein, CCC [j] represents the jth element of sequence of differences, works as j=j_maxTime, make CC [j+1]=0；

S114, true according to the sequence number of element that element value in the sequence of differences of X passage obtained and the sequence of differences of Y passage is-2 Determine the position of touch point.

The control method of 3D hologram interaction systems based on track identification the most according to claim 1, it is characterised in that The position coordinates of the multiple touch points obtained the most in the same time according to two or more described in described step S14, it may be judged whether have Fixing point, itself particularly as follows:

The position coordinates of multiple touch points two or more obtained the most in the same time carries out comparison one by one respectively, if when difference Abscissa difference and the vertical coordinate difference of carving two touch points obtained are respectively less than predetermined threshold value, then judge this two touch points For fixing point, and select the position coordinates position coordinates as fixing point of any of which touch point.

The control method of 3D hologram interaction systems based on track identification the most according to claim 1, it is characterised in that Described step S15, including:

S151, calculate in multiple touch points of synchronization other touch point in addition to fixing point to the distance of fixing point, and Using farthest for a distance fixing point touch point as relative touch point；

S152, according to the position coordinates of the relative touch point in adjacent two moment and the position coordinates of fixing point, calculate two Individual relative touch point relative to the direction of rotation of fixing point and the anglec of rotation, i.e. obtain adjacent two moment relative touch point it Between the direction of motion and motion amplitude, and as after touch track terminate.

The control method of 3D hologram interaction systems based on track identification the most according to claim 1, it is characterised in that Described step S16, itself particularly as follows:

Judge whether do relatively close motion between multiple touch points in adjacent two moment or be relatively distant from motion, the most then Judge that touch track is effective, obtain its relative motion trend as touch track, otherwise terminate.

6. a kind of based on track identification the 3D hologram interaction systems of the control method in application claim 1, its feature exists In, including control rack, touch screen, for providing the laid out flat source of 3D hologram stereo-picture, for laid out flat source The image provided carry out reflecting and the holographic imaging plate of phantom imaging and for perform claim 1 based on track identification The controller of control method of 3D hologram interaction systems；

Described touch screen is combined by transparent capacitive touch control film and clear glass and is formed, described touch screen and laid out flat source all with control Device processed connects, and described controller is arranged in control rack；

The showroom being arranged over square shape of described control rack, described laid out flat source is horizontally disposed at showroom Bottom surface, described holographic imaging plate is arranged on the upside in laid out flat source and becomes 45 degree of angles, institute with the upper surface in laid out flat source State touch screen to be arranged on the front side of holographic imaging plate and the inner side of touch screen and become 45 degree of angles, described touch screen structure with holographic imaging plate Become the one side of showroom.