CN109817120B - Digital interactive landscape system - Google Patents
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- CN109817120B CN109817120B CN201910115331.2A CN201910115331A CN109817120B CN 109817120 B CN109817120 B CN 109817120B CN 201910115331 A CN201910115331 A CN 201910115331A CN 109817120 B CN109817120 B CN 109817120B
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Abstract
A digital interactive landscape system comprises a base, a display screen, a top cover, a projection module, an action detection module, an image acquisition module, a voice active detection module and a control module. The image acquisition module acquires original images of an object under a plurality of viewing angles. The motion detection module detects an entry, a viewing distance, and a viewing perspective of a viewer. The voice active detection module captures voices around the landscape system and identifies voices related to the landscape from the voices. The control module receives and stores an original image of an object, generates a front projection image of the object according to the entrance of a viewer, determines viewing angle change according to viewing distance and viewing angle, and generates a projection image of the object corresponding to the viewing angle change. The projection module includes a projector and an optical assembly. The display screen is sequentially provided with a wear-resistant layer, a first FTO glass layer and a WO from outside to inside3Ag film layer, TiO2A ruthenium dye layer, an electrolyte layer, a Pt layer, a second FTO glass layer, an optical barrier layer and an optical diffusion layer.
Description
Technical Field
The application relates to the field of multimedia, in particular to a digital interactive landscape system.
Background
In the landscape design of scenic spots such as gardens, temples and the like, objects are usually arranged. Therefore, when a change in design is required, the arrangement needs to be replaced or moved, which causes great waste and cost. In recent years, holographic imaging technology has been used for landscape arrangement, however, it is difficult for a technology implemented in a flat display mode to achieve a realistic display effect without the aid of wearable equipment, the visual depth effect is poor, and a dizzy feeling is easily generated when the user watches for a long time; and a stereoscopic display scheme (e.g., CN201510562908.6) based on an arc screen is adopted, which can provide 360-degree look around, but still has the problems of poor depth information representation capability, insufficient stereoscopic perception, poor interactivity and the like in a stereoscopic picture.
Disclosure of Invention
In order to solve the problems, the invention provides a digital interactive landscape system which comprises a base, a display screen, a top cover, a projection module, an action detection module, an image acquisition module, a voice active detection module and a control module. The image acquisition module is used for acquiring an original object image of an object under a plurality of viewing visual angles; the action detection module is used for detecting the entrance, the viewing distance and the viewing angle of a viewer; the voice active detection module is used forCapturing voices around the landscape system and recognizing voices related to the landscape from the voices; the control module receives the original object image acquired by the image acquisition module in a wireless mode, stores the original object image in the local area, and generates a front projection object based on the original object image according to the entrance of the viewer; determining the change of the viewing angle according to the viewing distance and the viewing angle, and generating an object projection image corresponding to the change of the viewing angle based on the object original image; the projection module comprises a projector and an optical assembly, the projector is used for outputting the projection image generated by the control module to the optical assembly, and the optical assembly is used for receiving the projection image and delivering the projection image to the display screen; the base comprises a hollow cylindrical upper part and a lower part, the diameter of the upper part is smaller than that of the lower part, and a transparent supporting disc is arranged in the upper part; the display screen is in a hollow cylindrical shape, and the cross section of the display screen is the same as that of the upper part of the base; the top cover is in a hollow cylindrical shape, and the cross section of the top cover is the same as that of the display screen; the display screen is transparent, and is provided with a wear-resistant layer, a first FTO glass layer and a WO in sequence from outside to inside3Ag film layer, TiO2The display screen comprises a ruthenium dye layer, an electrolyte layer, a Pt layer, a second FTO glass layer, an optical barrier layer and an optical diffusion layer, and the display screen comprises the following preparation steps:
(1) cleaning the FTO glass by using a cleaning agent, water, 0.1M hydrochloric acid, ethanol and acetone in sequence in an ultrasonic cleaning tank at room temperature;
(2) mixing Na2WO4-2H2O dissolved in H containing 35%2O2In deionized water and stirred at room temperature for 20 minutes, wherein W and H2O2At a molar ratio of 1:4, followed by dropwise addition of nitric acid to bring the pH to 2; stirring until a clear pure yellow solution is generated and standing to generate a light yellow precipitate; the pale yellow precipitate was filtered off and washed with deionized water and finally dried at 150 ℃ for 2 hours to give WO3Powder;
(3) subjecting the WO obtained in step (2) to a PVD process with gradually increasing current3Powder was deposited on the first FTO glass at a rate of 0.3 a/s to form a 315nm thin film; using Ag nano particles as a dopant, and using a PVD method to remove WO at a speed of 0.1 angstrom/second3Powder deposition on the film to form WO3Ag film layer, wherein the duration is 1 minute, and finally at 350 ℃ to the WO3Heating the Ag film layer for 30 minutes;
(4) adding titanium isopropoxide to an ethanol solution containing ethyl acetoacetate to form TiO2Sol, wherein the mass ratio of titanium isopropoxide to ethyl acetoacetate is 2.5: 1; dissolving ORMOSIL precursor in ethanol solution, hydrolyzing/concentrating under catalysis of 0.1M hydrochloric acid, and adding the TiO2Putting the sol into the reaction solution, mixing and stirring for 30 minutes; depositing the mixed solution on the WO3On the/Ag thin film layer to form a first FTO/WO3/Ag/TiO2Layer and annealed at 450 minutes for 30 minutes; subjecting said first FTO/WO to3/Ag/TiO2The layer was left in an ethanol solution containing ruthenium dye for 2 hours and heated to 60 ℃ to obtain a first FTO/WO3/Ag/TiO2A ruthenium dye layer;
(5) printing an electrolyte containing LiI at a concentration of 0.5M on the second FTO glass on which the 2nm Pt layer is formed to form an electrolyte/Pt/second FTO layer; and
(6) subjecting said first FTO/WO to3/Ag/TiO2A ruthenium dye layer bonded to the electrolyte/Pt/second FTO layer to form the first FTO/WO3/Ag/TiO2Ruthenium dye layer/electrolyte/Pt/second FTO layer.
Further, the base further includes an orientation adjustment stage for supporting the projector and adjusting the orientation thereof; the azimuth adjusting table comprises an upper part and a lower part, and azimuth adjusting components are respectively arranged at four corners where the upper part is connected with the lower part; the orientation adjustment assembly includes a first bolt configured to adjust a distance between the upper and lower portions and provide an upward force to the upper portion and a second bolt configured to adjust a distance between the upper and lower portions and provide a downward force to the upper portion; the upper surface on upper portion is formed with the silica gel layer, and has seted up a plurality of adsorption holes, the adsorption hole passes through gas passage and links to each other with the vacuum pump.
Further, the optical assembly includes a convex lens, a concave lens, a first mirror, and a second mirror; the convex lens is fixed in the base and used for receiving the image from the projector and throwing the image onto the first reflector; the first reflector is a plane reflector, is fixed between the bottom surface of the lower part of the base and the transparent support disc, is arranged at an angle of 45 degrees relative to the optical axis of the convex lens, and is used for reflecting the image projected by the convex lens to the concave lens; the concave lens is fixed on the transparent supporting disc in the middle and is used for putting the image reflected by the first reflector on the second reflector; the second reflector is arranged on the inner side of the top surface of the top cover and is provided with a conical reflecting surface, the central axis of the conical reflecting surface is coincided with the central axis of the top cover, and the conical reflecting surface is used for receiving the image projection from the concave lens and reflecting the image projection to the side surface of the display screen.
Furthermore, the top cover and the display screen and the base are connected through quick connecting and disconnecting pieces respectively; the quick disconnect includes a first connection and a second connection; the first connecting part comprises a connecting block, one end of the connecting block is used for fixedly connecting the lower end of the top cover, and a protruding part protruding outwards is formed on the surface of the other opposite end; the second connecting part comprises a first elastic body and a second elastic body, one end of the first elastic body is used for fixedly connecting the upper end of the display screen, a bulge is formed downwards at a certain distance from the connecting area of the display screen along the radial inward direction, and a concave part capable of being tightly jointed with the protruding part is formed on the surface of the other opposite end; the second elastic piece is provided with a plane attaching part for fixing on the inner side wall of the display screen, a bending part which faces upwards is formed by smoothly bending and extending the end of the plane attaching part far away from the first elastic piece, and a certain angle is formed between the bending part and the plane attaching part so that the bending part inclines relative to the plane attaching part to be capable of being abutted against the bulge of the first elastic piece.
Furthermore, the action detection module comprises a plurality of groups of position detection units which are uniformly arranged along the circumference of the base at intervals and are numbered in sequence; the position detection unit comprises a near-infrared receiver and at least two near-infrared transmitters, wherein the at least two near-infrared transmitters are symmetrical about the near-infrared receiver and are obliquely arranged nearby the near-infrared receiver relative to the near-infrared receiver, so that the near-infrared receiver can only receive near-infrared reflection signals within a positive and negative theta/2 angle range about a center line of the near-infrared receiver.
Still further, the control module is configured to receive the detection electrical signal output by the position detection unit, and determine the change of the viewing angle according to the strength of the detection electrical signal and the number of the position detection unit; and when one of the position detection units no longer outputs a detection electric signal and the intensity of the last output detection electric signal is greater than a first threshold value, and at the same time, another position detection unit adjacent to the one position detection unit starts to output a detection electric signal and the intensity of the detection electric signal is greater than the first threshold value, comparing the intensity of the last output detection electric signal of the one position detection unit with the intensity of the first output detection electric signal of the other position detection unit, if the intensity difference between the two detection electric signals is within a second threshold value, determining that the viewing angle of the viewer has changed by an angle θ, and generating a projection image at the viewing angle corresponding to the change of the angle θ based on the original image of the object.
Further, the image acquisition module comprises a turntable unit, a digital camera and two light sources; the turntable unit comprises a base, a central rotating shaft, an object support, a rotating arm and a micro motor, wherein the central rotating shaft is installed on the base and is driven by the micro motor to rotate, the rotating arm is connected with the central rotating shaft to synchronously rotate with the central rotating shaft, the object support bears an object and is installed at the upper end of the central rotating shaft through a bearing, the tray is connected with the tail end of the rotating arm through a height adjusting unit to bear the digital camera and the two light sources, and the two light sources are symmetrically arranged on the object support about the center of the object and the connecting line between the centers of the digital camera. Preferably, the control module is configured to cause the digital camera to take a picture of the object every 1 degree of rotation.
Further, to generate the object projection image, the control module is configured to perform a step of acquiring the object original image, a step of correcting the object original image based on a curvature of the stereoscopic display area, a step of combining viewpoint images based on the viewing angle, and a step of performing image projection coordinate system transformation.
Further, the control module is configured to generate and output an object projection image based on the object original image preferentially when the viewer enters if the object original image of the landscape corresponding to the voice recognized by the voice active detection module is saved in the control module.
Drawings
Embodiments of the invention will now be described in detail, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 shows a block diagram of a digital interactive landscape system according to the present invention; and
fig. 2 is a schematic structural diagram of a base, a display screen and a top cover of the digital interactive landscape system according to the present invention.
Detailed Description
According to the present invention, the digital interactive landscape system may include a base, a display screen, a top cover, a projection module, an action detection module, an image acquisition module, and a control module, as shown in fig. 1.
Fig. 2 shows a schematic structural diagram of the base, display screen and top cover of the present invention. As shown, the susceptor may include a hollow cylindrical lower portion and a hollow cylindrical upper portion, wherein the upper portion has a smaller diameter than the lower portion, and a transparent support disk is disposed in the upper portion. The display screen may be hollow cylindrical and have a cross-sectional shape identical to that of the upper portion of the base. The top cover may be a hollow cylinder and have a cross-sectional shape identical to that of the display screen.
The display screen is transparent as a whole, and is sequentially provided with a wear-resistant layer, an FTO glass layer and a WO from outside to inside3Ag film layer, TiO2Ruthenium dye layer, electrolyte layer, Pt layer, FTO glass layer, optical barrier layer and optical diffusion layer. In the display screen of the invention, FTO glass layer, WO3Ag film layer, TiO2The/ruthenium dye layer, the electrolyte layer, the Pt layer and the FTO glass layer form an electrochromic layer, the color and the transmittance of the display screen can be automatically adjusted according to the change of ambient light, and solar energy can be absorbed and converted into electric energy to drive the electrochromic layer to work. Therefore, the display screen can change in display color and transparency according to the change of the ambient light, so that the ornamental value of the display screen is greatly enhanced, and meanwhile, no additional power supply is required. As will be readily understood by those skilled in the art, abrasion resistant layer, FTO glass layer, WO3Ag film layer, TiO2The ruthenium dye layer, electrolyte layer, Pt layer and FTO glass layer may also be omitted, while the optical barrier layer and optical diffusion layer are carried by other transparent materials such as ordinary glass, but the abrasion resistant layer, FTO glass layer, WO3Ag film layer, TiO2The arrangement of the/ruthenium dye layer, the electrolyte layer, the Pt layer and the FTO glass layer is preferred.
The process of making the electrochromic layer of the display of the present invention will be described in further detail below to enable those skilled in the art to more clearly understand the particular modifications made therein to the use of the landscape system of the present invention in outdoor environments.
The electrochromic layer of the display screen of the present invention includes the following preparation steps.
(1) Cleaning the FTO glass: the FTO glass was cleaned with a cleaning agent and water, 0.1M hydrochloric acid, ethanol, and acetone, respectively, in an ultrasonic cleaning tank at room temperature.
(2)WO3Preparation of particles: feet with feetAmount Na2WO4-2H2O dissolved in a solution containing 35% H2O2And stirred at room temperature for 20 minutes, wherein W and H2O2In a molar ratio of 1: 4. Nitric acid was added dropwise to the solution until the solution had a pH of 2. Stirring was continued until a clear pure yellow solution resulted. The solution was allowed to stand for a period of time to form a pale yellow precipitate. The pale yellow precipitate was filtered and washed with deionized water and dried at 150 ℃ for 2 hours to give WO3And (3) powder.
(3)WO3Preparing an Ag thin film layer: using PVD method to gradually increase current to treat WO obtained in step (2)3The powder was deposited on FTO glass to form a 315nm film with a deposition rate of 0.3 angstroms/second. Then, using Ag nano particles as a dopant, again using PVD method to deposit WO at a deposition rate of 0.1A/s3The powder was deposited on the above film for a duration of 1 minute. At 350 ℃ to WO3Heating the Ag film layer for 30 minutes. Here, WO is modified by Ag nanoparticles3The thin film layer can significantly improve the optical response and the color change efficiency of the electrochromic layer, which is very beneficial to improve or enhance the visual effect of the landscape.
(4)TiO2Preparation of ruthenium dye layer: adding titanium isopropoxide to an ethanol solution containing ethyl acetoacetate to form TiO2And (3) sol, wherein the mass ratio of titanium isopropoxide to ethyl acetoacetate is 2.5: 1. Dissolving ORMOSIL (organic modified silica) precursor in ethanol solution, allowing hydrolysis/concentration reaction under catalysis of 0.1M hydrochloric acid, and adding TiO2The sol was placed in the solution and mixed for 30 minutes. Subsequently, the mixed solution was deposited on WO3Forming TiO on/Ag film layer2Layer and annealed at 450 minutes for 30 minutes. Mixing FTO/WO3/Ag/TiO2The layer was left to stand in an ethanol solution containing ruthenium dye for 2 hours and heated to 60 ℃ to obtain FTO/WO3/Ag/TiO2A ruthenium dye layer structure.
(5) An electrolyte having a concentration of LiI of 0.5M is printed (e.g., by sputtering) on the FTO glass on which the 2nm thick Pt layer is formed, for example, by means of a doctor blade, and the structure obtained in step (4) and the structure obtained in step (5) are bonded to obtain the electrochromic layer of the present invention.
In order to facilitate the installation and maintenance of the landscape system, the base, the display screen and the top cover can be respectively connected in a sealing way through quick disassembling and connecting pieces. The structure and operation of the quick release connector will be described below by taking the sealing connection between the top cover and the display screen as an example.
The quick disconnect may include a first connection portion and a second connection portion. The first connecting part may include a connecting block having one end for fixedly connecting the lower end of the top cap and an outwardly protruding protrusion (e.g., downwardly protruding along the central axis of the cylinder housing in the assembled state of the present invention) formed on the surface of the opposite end.
The second connection portion may include a first elastic body and a second elastic body. One end of the first elastic body is used for fixedly connecting the upper end of the display screen, a bulge is formed downwards at a certain distance from the display screen connecting part in the radial inward direction, and a concave part capable of being tightly jointed with the protruding part is formed on the surface of the other opposite end. The second elastic piece is provided with a plane attaching part for fixing on the inner side wall of the display screen, a bending part which faces upwards in general is formed by extending the end of the plane attaching part far away from the first elastic piece in a smooth bending mode, and a certain angle is formed between the bending part and the plane attaching part so that the bending part inclines relative to the plane attaching part and can be abutted against the bulge of the first elastic piece. Under the connecting structure, firstly, the tight connection between the top cover and the display screen can be conveniently realized due to the matching action of the protruding part and the concave part; meanwhile, by means of the unique structures of the first elastic body and the second elastic body in the second connecting part, the quick-disassembling piece has the capability of buffering impact force from all directions, and can provide upward acting force for the second connecting part to press the second connecting part on the first connecting part, so that the two parts are combined more tightly. Obviously, the quick-release connector can well meet the requirements of landscape systems in outdoor application occasions. Preferably, the elasticity of the second elastic member is greater than the elasticity of the first elastic member.
The projection module may include a projector and an optical assembly consisting of a convex lens, a concave lens, a first mirror, and a second mirror.
In the invention, the projector can adopt a commercial small-sized projector, thereby reducing the hardware requirement and the cost of the landscape system for the projection equipment. Since commercial projectors may have various sizes (e.g., heights) and optical axis directions, an orientation adjusting stage fixed to a lower bottom surface of the base may be further included in the base of the present invention for supporting the projector and adjusting its orientation.
In the present invention, the azimuth adjustment stage may include upper and lower portions, and the azimuth adjustment assemblies are respectively provided at four corners where the upper and lower portions are connected. The orientation adjustment assembly may include a first bolt and a second bolt, each for adjusting the distance between the upper and lower portions, wherein the first bolt is configured to provide an upward jacking force to the upper portion and the second bolt is configured to provide a downward pulling force to the upper portion. By means of this combination of the pair of upward-pushing and downward-pulling forces, the distance between the upper part and the lower part can be adjusted to the value set by the first and second bolts, still very accurately and stably, under the influence of the weight of the projector being carried. And, because all be provided with the position control subassembly in four corners, consequently can adjust upper portion height and position for the lower part very conveniently and accurately, and then realize the position control to the projecting apparatus of placing on upper portion. In addition, a silica gel layer can be formed on the upper surface of the upper part of the vacuum pump, and a plurality of adsorption holes are formed in the upper surface of the upper part of the vacuum pump, wherein the adsorption holes can be connected with a small vacuum pump through a gas channel. In the use, at first place the projecting apparatus on the silica gel layer of upper portion upper surface, because the silica gel layer has better deformability, consequently, under the dead weight effect of projecting apparatus, the lower surface of projecting apparatus will form the laminating with the silica gel layer well, at this moment, will form the vacuum through starting the vacuum pump via gas channel and adsorption hole well between the lower surface of projecting apparatus and the contact interface with the silica gel layer to firmly adsorb the fixing on position adjusting station with the projecting apparatus. By means of the base, the arrangement and alignment of the projector can be conveniently, accurately and stably realized, and the base is particularly suitable for outdoor use scenes. Preferably, a small vacuum pump may be provided on the lower side of the azimuth adjustment stage.
A convex lens may be fixed within the base for receiving an image from the projector and projecting it onto the first mirror. The first reflector can be a plane reflector, is fixed between the bottom surface of the lower part of the base and the transparent supporting disc and is arranged at an angle of 45 degrees relative to the optical axis of the convex lens, and is used for reflecting the image projected by the convex lens to the concave lens. A concave lens is centrally fixed to the transparent support disk for projecting the image reflected by the first mirror onto the second mirror. The second reflector is arranged on the inner side of the top surface of the top cover and is provided with a conical reflecting surface, the central axis of the conical reflecting surface is coincident with the central axis of the top cover, and the conical reflecting surface is used for receiving the image projection from the concave lens and reflecting the image projection to the side surface of the display screen, namely the stereoscopic display area.
With the projection module of the present invention, it is possible to make the image from the projector fall completely on the stereoscopic display area of the display screen after optical transmission via the optical assembly by setting the parameters of the convex lens and the concave lens, the cone angle of the second reflecting mirror, and the distances of the convex lens, the first reflecting mirror, the concave lens, and the second reflecting mirror to each other reasonably.
The projection module of the invention can realize the omnibearing image three-dimensional display with a very simple structure, namely, the same three-dimensional display effect can be obtained from any direction. In the conventional flat display mode, when the observation distance is too close or too far, the phenomenon of parallax inversion occurs, and in the omnibearing image stereo display scheme based on the cylindrical display screen in the prior art, the problem of poor depth perception effect of stereo display generally exists. In addition, it is often difficult to provide stereoscopic perception due to the presence of shadows in the conventional planar or cylindrical display modes, and particularly with the stereoscopic display region structure implemented by the optical barrier layer and the diffusion layer of the present invention, light intensity distribution very similar to that of a human viewing a real object can be simulated, thereby implementing a more realistic stereoscopic display effect.
The motion detection module of the present invention may include a plurality of sets of position detection units that are evenly spaced along the circumference of the base. The position detection unit may include at least two near infrared transmitters and a near infrared receiver, and the at least two transmitters may be symmetrically disposed about the receiver in the vicinity of the receiver such that the receiver can receive only near infrared reflected signals within plus or minus θ/2 degrees about its center line. As an example, in each position detection unit, the near-infrared receiver can detect only a reflected signal within ± 5 ° about its center line (i.e., θ is 10 °), and accordingly, 36 sets of position detection units may be provided at the motion detection module to provide an omnidirectional detection range. In the present invention, if a viewer moves from the detection range of one position detection unit to the detection range of an adjacent position detection unit, it is considered that the viewing angle of the viewer has changed by the angle θ, or that the viewer has rotated by the angle θ around the stereoscopic display region.
The action detection module of the invention also numbers a plurality of groups of position detection units, the control module receives the electric signals output by the position detection units, and determines the position change of the viewer according to the strength of the electric signals (namely the distance from the display area) and the number of the position detection unit outputting the electric signals. As an example, assuming that the position detection units are numbered in the clockwise direction, when the position detection unit numbered a no longer outputs the detection electrical signal and the intensity of the detection electrical signal that is finally output is greater than the first threshold, and at the same time the position detection unit numbered a +1 starts to output the detection electrical signal and the intensity of the detection electrical signal is also greater than the first threshold, this typically means that a viewer who is originally in the detection area corresponding to the position detection unit a may move to the detection area corresponding to the position detection unit a + 1. Therefore, the control module then compares the intensity of the detection electric signal that the position detection unit a last outputs with the intensity of the detection electric signal that the position detection unit a +1 first outputs. If the intensity difference between the two detected electrical signals is within the second threshold, it is determined that the viewer who is originally in the detection region corresponding to the position detection unit a moves to the detection region corresponding to the position detection unit a +1, and at this time, it is determined that the viewer has rotated around the cylindrical stereoscopic display region by the angle θ in the clockwise direction, that is, the viewing angle of the viewer has changed by the angle θ. In the present invention, the second threshold value may be determined based on empirical statistics of the single movement distance, and the first threshold value may be determined based on the maximum detection distance of the near-infrared receiver and empirical statistics of the single movement distance.
The image acquisition module may include a turntable unit, a digital camera, and two light sources. The turntable unit may include a base, a central rotating shaft, an object support, a rotating arm, and a micro motor. The central rotating shaft is installed on the base and is driven by the micro motor to rotate. The rotating arm is connected with the central rotating shaft so as to be capable of synchronously rotating with the central rotating shaft. The object support is used for bearing landscape objects or models to be imaged and is arranged at the upper end of the central rotating shaft through a bearing so as to keep static when the central rotating shaft rotates. At the end of the rotating arm a tray is provided for carrying the digital camera and the two light sources. The tray is connected with the tail end of the rotating arm through the height adjusting unit to ensure that the digital camera and the two light sources can be in the same horizontal plane with a landscape object or a model on the object support, wherein the two light sources are symmetrically arranged about a connecting line between the center of the landscape object or the model and the center of the digital camera to simulate the observing positions of two eyes of an observer when the observer observes an object. In the process of imaging the landscape real object or the model, the camera and the light source synchronously take pictures around the landscape real object or the model arranged on the object support under the driving action of the motor. According to the invention, the control module can be configured to make the camera take a picture of the scenery real object or the model once when the camera rotates a preset angle (for example, 1 degree) to obtain the original images of the object under different viewing angles, wherein the accurate shadow effect can be obtained by means of the light source setting mode of the invention. Preferably, the digital camera of the present invention may be a microsoft Kinect camera.
In the present invention, the control module may be disposed within the base, and the image acquisition module may be disposed outside the base, such as a control room. The staff utilizes the image acquisition module to obtain original view image in the control room to through wired or wireless mode conveying to the control module and save in it. Preferably, the image acquisition module and the control module realize data transmission in a wireless mode.
When the position detection unit in the motion detection module detects that the viewer appears in a certain orientation (i.e., the viewer first enters the viewing range), the control module first outputs a projected image of the landscape front to the projector module based on the original landscape image. Because the invention adopts the curved surface display screen rather than the plane display screen, the projection image directly output based on the original image of the object is deformed when being projected on the curved surface display screen, therefore, the control module needs to correct the original landscape image before outputting the projection image so as to avoid projecting the deformed image on the curved surface display screen.
When the motion detection module detects that the observer rotates around the curved display screen, for example, the observer moves from the detection area a to the detection area a +1 as described above, the control module obtains the rotation angle θ of the observer relative to the initial observation position (for example, the observation angle between the detection area a and the detection area a +1 is different by 10 degrees), and the control module outputs to the projector module a projection image corresponding to the landscape seen in the observation direction at the angle θ with respect to the observation angle before rotation (for example, the front of the object) based on the original landscape image, so as to form an interaction with the movement of the observer, so that the observer can feel the landscape display effect at different angles as the observation position of the observer changes, and thus a more realistic display effect is obtained. The process of outputting the projection image in the curved surface display area based on the original landscape image of the invention can comprise the steps of obtaining the original landscape image, correcting the original landscape image based on the curved surface display area, combining the corresponding observation point images based on the detected observation direction and transforming the image projection coordinate system. The specific implementation of the above steps is known to those skilled in the art already in the context of the description of their functional role, and therefore, will not be described in detail herein.
The landscape system of the present invention may also include a voice active detection module (VAD) for capturing spoken sounds in the vicinity of the landscape system and identifying therefrom landscape-related voices. If the landscape corresponding to the voice is stored in the control module, the control module preferentially enables the landscape system to display the landscape when the viewer approaches the landscape system. The landscape system with the arrangement is particularly suitable for being applied to scenic spots such as temples, for example, original landscape images of landscapes such as lotus flowers and various buddies are stored in the control module in advance and displayed when nearby visitors mention the images, and a good landscape effect can be obtained.
In the foregoing specification, the principles of the invention have been described with reference to specific exemplary embodiments thereof. It will be apparent to those skilled in the art that various modifications or changes may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (9)
1. A digital interactive landscape system comprises a base, a display screen, a top cover, a projection module, an action detection module, an image acquisition module, a voice active detection module and a control module; wherein the content of the first and second substances,
the image acquisition module is used for acquiring an original object image of an object under a plurality of viewing visual angles;
the action detection module is used for detecting the entrance, the viewing distance and the viewing angle of a viewer;
the voice active detection module is used for capturing voices around the landscape system and recognizing voices related to the landscape from the voices;
the control module receives the original object image acquired by the image acquisition module in a wireless mode, stores the original object image in the local area, and generates a front projection object based on the original object image according to the entrance of the viewer; determining the change of the viewing angle according to the viewing distance and the viewing angle, and generating an object projection image corresponding to the change of the viewing angle based on the object original image;
the projection module comprises a projector and an optical assembly, the projector is used for outputting the projection image generated by the control module to the optical assembly, and the optical assembly is used for receiving the projection image and delivering the projection image to the display screen;
the base comprises a hollow cylindrical upper part and a lower part, the diameter of the upper part is smaller than that of the lower part, and a transparent supporting disc is arranged in the upper part; the display screen is in a hollow cylindrical shape, and the cross section of the display screen is the same as that of the upper part of the base; the top cover is in a hollow cylindrical shape, and the cross section of the top cover is the same as that of the display screen;
the display screen is transparent, and is provided with a wear-resistant layer, a first FTO glass layer and a WO in sequence from outside to inside3Ag film layer, TiO2The display screen comprises a ruthenium dye layer, an electrolyte layer, a Pt layer, a second FTO glass layer, an optical barrier layer and an optical diffusion layer, and the display screen comprises the following preparation steps:
(1) cleaning the FTO glass by using a cleaning agent, water, 0.1M hydrochloric acid, ethanol and acetone in sequence in an ultrasonic cleaning tank at room temperature;
(2) mixing Na2WO4-2H2O dissolved in H containing 35%2O2In deionized water and stirred at room temperature for 20 minutes, wherein W and H2O2At a molar ratio of 1:4, followed by dropwise addition of nitric acid to bring the pH to 2; stirring until a clear pure yellow solution is generated and standing to generate a light yellow precipitate; the pale yellow precipitate was filtered off and washed with deionized water and finally dried at 150 ℃ for 2 hours to give WO3Powder;
(3) subjecting the WO obtained in step (2) to a PVD process with gradually increasing current3Powder was deposited on the first FTO glass at a rate of 0.3 a/s to form a 315nm thin film; using Ag nano particles as doping agent againApplying WO at a rate of 0.1A/s by PVD3Powder deposition on the film to form WO3Ag film layer, wherein the duration is 1 minute, and finally at 350 ℃ to the WO3Heating the Ag film layer for 30 minutes;
(4) adding titanium isopropoxide to an ethanol solution containing ethyl acetoacetate to form TiO2Sol, wherein the mass ratio of the titanium isopropoxide to the ethyl acetoacetate is 2.5: 1; dissolving ORMOSIL precursor in ethanol solution, hydrolyzing/concentrating under catalysis of 0.1M hydrochloric acid, and adding the TiO2Putting the sol into the reaction solution, mixing and stirring for 30 minutes; depositing the mixed solution on the WO3On Ag film layer to form first FTO glass/WO3/Ag/TiO2Layer and annealed at 450 minutes for 30 minutes; subjecting the first FTO glass/WO3/Ag/TiO2The layer was left in an ethanol solution containing ruthenium dye for 2 hours and heated to 60 ℃ to obtain a first FTO glass/WO3/Ag/TiO2A ruthenium dye layer;
(5) printing an electrolyte containing LiI at a concentration of 0.5M on the second FTO glass on which the 2nm Pt layer is formed to form an electrolyte/Pt/second FTO glass layer; and
(6) subjecting the first FTO glass/WO3/Ag/TiO2Ruthenium dye layer bonded to the electrolyte/Pt/second FTO glass layer to form the first FTO glass/WO3/Ag/TiO2Ruthenium dye layer/electrolyte/Pt/second FTO glass layer;
the optical assembly comprises a convex lens, a concave lens, a first reflector and a second reflector; the convex lens is fixed in the base and used for receiving the image from the projector and putting the image on the first reflector; the first reflector is a plane reflector, is fixed between the bottom surface of the lower part of the base and the transparent support disc, is arranged at an angle of 45 degrees relative to the optical axis of the convex lens, and is used for reflecting the image projected by the convex lens to the concave lens; the concave lens is fixed on the transparent supporting disc in the middle and is used for putting the image reflected by the first reflector on the second reflector; the second reflector is arranged on the inner side of the top surface of the top cover and is provided with a conical reflecting surface, the central axis of the conical reflecting surface is coincided with the central axis of the top cover, and the conical reflecting surface is used for receiving the image projection from the concave lens and reflecting the image projection to the side surface of the display screen.
2. The digital interactive landscape system of claim 1, wherein the base further comprises an orientation adjustment stage for supporting and adjusting the orientation of the projector; the azimuth adjusting table comprises an upper part and a lower part, and azimuth adjusting components are respectively arranged at four corners where the upper part is connected with the lower part; the orientation adjustment assembly includes a first bolt configured to adjust a distance between the upper and lower portions and provide an upward force to the upper portion and a second bolt configured to adjust a distance between the upper and lower portions and provide a downward force to the upper portion; the upper surface on upper portion is formed with the silica gel layer, and has seted up a plurality of adsorption holes, the adsorption hole passes through gas passage and links to each other with the vacuum pump.
3. The digital interactive landscape system of claim 1, wherein the top cover and the display screen and the base are connected by quick disconnects, respectively; the quick disconnect includes a first connection and a second connection; the first connecting part comprises a connecting block, one end of the connecting block is used for fixedly connecting the lower end of the top cover, and a protruding part protruding outwards is formed on the surface of the other opposite end; the second connecting part comprises a first elastic body and a second elastic body, one end of the first elastic body is used for fixedly connecting the upper end of the display screen, a bulge is formed downwards at a certain distance from the connecting area of the display screen along the radial inward direction, and a concave part capable of being tightly jointed with the protruding part is formed on the surface of the other opposite end; the second elastic piece is provided with a plane attaching part for fixing on the inner side wall of the display screen, a bending part which faces upwards is formed by smoothly bending and extending the end of the plane attaching part far away from the first elastic piece, and a certain angle is formed between the bending part and the plane attaching part so that the bending part inclines relative to the plane attaching part to be capable of being abutted against the bulge of the first elastic piece.
4. The digital interactive landscape system of claim 1, wherein the motion detection module comprises a plurality of sets of position detection units evenly spaced along the circumference of the base and numbered in sequence; the position detection unit comprises a near-infrared receiver and at least two near-infrared transmitters, wherein the at least two near-infrared transmitters are symmetrical about the near-infrared receiver and are obliquely arranged nearby the near-infrared receiver relative to the near-infrared receiver, so that the near-infrared receiver can only receive near-infrared reflection signals within a positive and negative theta/2 angle range about a center line of the near-infrared receiver.
5. The digital interactive landscape system of claim 4, wherein the control module is configured to receive the detection electrical signal output by the position detection unit and determine the change of the viewing angle according to the intensity of the detection electrical signal and the number of the position detection unit; and when one of the position detection units no longer outputs a detection electric signal and the intensity of the last output detection electric signal is greater than a first threshold value, and at the same time, another position detection unit adjacent to the one position detection unit starts to output a detection electric signal and the intensity of the detection electric signal is greater than the first threshold value, comparing the intensity of the last output detection electric signal of the one position detection unit with the intensity of the first output detection electric signal of the other position detection unit, if the intensity difference between the two detection electric signals is within a second threshold value, determining that the viewing angle of the viewer has changed by an angle θ, and generating a projection image at the viewing angle corresponding to the change of the angle θ based on the original image of the object.
6. The digital interactive landscape system of claim 1, wherein the image acquisition module comprises a turntable unit, a digital camera and two light sources; the turntable unit comprises a base, a central rotating shaft, an object support, a rotating arm and a micro motor, wherein the central rotating shaft is installed on the base and is driven by the micro motor to rotate, the rotating arm is connected with the central rotating shaft to synchronously rotate with the central rotating shaft, the object support bears an object and is installed at the upper end of the central rotating shaft through a bearing, a tray is connected to the tail end of the rotating arm through a height adjusting unit to bear the digital camera and the two light sources, and the two light sources are symmetrically arranged on the object support about the center of the object and a connecting line between the centers of the digital camera.
7. The digital interactive landscape system of claim 6, wherein the control module is configured to cause the digital camera to take a photograph of the object every 1 degree of rotation.
8. The digital interactive landscape system of claim 1, wherein to generate the projected image of the object, the control module is configured to perform the steps of acquiring the original image of the object, correcting the original image of the object based on the curvature of the stereoscopic display area, combining the viewpoint images based on the viewing perspective, and performing the image projection coordinate system transformation.
9. The digital interactive landscape system of claim 1, wherein the control module is configured to generate and output an object projection image based on the object original image preferentially when the viewer enters if the control module stores therein an object original image of the landscape corresponding to the voice recognized by the voice active detection module.
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| EP1550992A1 (en) * | 2003-12-29 | 2005-07-06 | MAO, Xiaogang | System for and method of visualizing images to viewers in motion |
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