CN105282533A - Large-scale scanning-type volumetric 3D video display system and imaging method thereof - Google Patents

Abstract

The present invention relates to a large-scale scanning-type volumetric 3D video display system and an imaging method thereof. A power supply system is connected with a motor and a bottom FPGA through power lines; the motor and the bottom FPGA are arranged inside a mechanical support; shaft extension of the motor aligns at a center position of an upper part of the mechanical support; a slip ring device is disposed in the central position of an upper end of the mechanical support and is connected with the shaft extension of the motor; a power supply switching system, a rotary FPGA, a signal distribution plate and an imaging unit plate array are fixed on a flat plate of the slip ring device; the signal distribution plate is disposed at a circle center position of the flat plate of the slip ring device and is connected with the rotary FPGA; the rotary FPGA is connected with an upper surface of the slip ring device; and the imaging unit plate array is connected with and fixed onto the signal distribution plate. With adoption of the system and the imaging method, the difficulty that the conventional imaging technology cannot achieve a large size is covercome, display full dynamic 3D videos is realized, large-scale volumetric 3D display and real-time full dynamic 3D video display are realized, and the system is reliable in operation, compact in structure and high in stability.

Description

Large-scale scan-type body 3 D video display system and formation method thereof

Technical field

The present invention relates to true three-dimension display technlolgies field, specifically a kind of large-scale scan-type body 3 D video display system and formation method thereof.

Background technology

The method of early stage display 3-D view is the binocular parallax principle that make use of human visual system, because two eye positions of people are different, so wherein from other one, eye have that some are different to the perception of image.Stereo display, by providing artificial binocular parallax to beholder, reaches stereoeffect, but these methods need beholder to wear special device in early days, as anaglyph spectacles etc., just can observe 3-D effect.

Body three-dimensional display is one of method of application binocular parallax, is also current up-to-date stereo display technique.Based on this Display Technique, the 3-D view with physical depth can be observed directly.Body three-dimensional stereo display technique has image fidelity, full what comes into a driver's, multi-angle, many people observe simultaneously and the many merits such as real-time, interactive.Body three-dimensional stereo display technique is a kind of brand-new three-dimensional image display technology, observes directly the 3-D view with physical depth based on this Display Technique, and it enters brand-new developing direction by leading scientific visualization, has broad application prospects.

The display of body 3 D stereo is a kind of stereo display method of real space imaging, it utilizes the vision mechanism that people self is special, manufacture a display replacing molecule particulate to form by voxel particulate in kind, except can seeing the shape that light wave embodies, the necessary being of voxel can also have been touched.And because the stereoscope effect that produces of binocular vision, extremely similar with film player system, appearing at the object on display screen minute surface, is completely illusory and not tangibly.If regard as vision by really seeing, really is seen as illusion, and so body three-dimensional display is not the illusion that stereoscope presents, but a kind of objective reality is true.Because body three-dimensional display puts into 3D image in a volume, so body three-dimensional display inherently supports motion parallax, the difference of shown object on direction can be observed at diverse location.Motion parallax can be divided into move both vertically parallax and horizontal movement parallax.Some body dimension display technologies only support the parallax that moves both vertically, and these technology need head tracking apparatus to adjust the image that will show.And for full parallax body three-dimensional display, then without any need for head tracking apparatus.Body three-dimensional display can be divided into two kinds: one is static body display, shows 3D image by using static 3d space; Another kind is the display of scan-type body, produces 3D image by the motion of 2D scattering plane.2D plane in the display of scan-type body can be divided into passive and active.For passive scattering plane, then light direct irradiation activates corresponding 3-dimensional image voxel by reflection in passive scattering plane.For active scattering plane, because it is made up of two-dimentional active element (as light-emitting diode) array, therefore can active illuminating form voxel.

But existing most body dimension display technologies all can only show static image, and the image of display is all relatively little.Large-scale three-dimensional display may be used for a lot of object, as imaging of medical, and radar imagery, advertisement and amusement etc.In general, the design of body three-dimensional display all cannot reach very large size, and wherein topmost reason is the size that mechanical structure and image rendering limit the display of scan-type body.

Summary of the invention

The Problems existing of prior art and deficiency, the object of this invention is to provide a kind of method of brand-new scan-type body three-dimensional display in view of the above.

Technical scheme of the present invention comprises motor, electric power system, bottom FPGA, machinery mount, slip-ring device, switch power supply system, rotation FPGA, signal distribution board and image-generating unit plate array,

Wherein, electric power system connects motor and bottom FPGA respectively by power line, and motor and bottom FPGA are arranged at machinery mount inside, and the shaft extension of motor aims at the center of mechanical frame upper;

Slip-ring device is a disc slab construction, and slip-ring device is positioned at the center of machinery mount upper end, and is connected with the shaft extension of motor;

Switch power supply system, rotation FPGA, signal distribution board and image-generating unit plate array are separately fixed on the flat board on slip-ring device, signal distribution board is positioned at the home position of the flat board on slip-ring device, and be connected with rotation FPGA, rotate FPGA and be connected with the upper surface of slip-ring device;

Image-generating unit plate array is connected with signal distribution board and is fixed in signal distribution board;

Switch power supply system is connected with image-generating unit plate array with rotation FPGA, signal distribution board respectively.

Wherein, bottom FPGA uses the FPGA of XilinxSpartan-3E model, and this FPGA can provide three functional modules: data communication module; Command decode and control module; Data encapsulation module.

Wherein, image-generating unit plate array selects the FPGA of XilinxVirtex-5XC5VLX30T model, and this FPGA has 360 I/O ports, and wherein 300 I/O ports are used for imaging control, and remaining I/O port is used for control bus and data/address bus; Each pixel is made up of three light-emitting diodes, and each FPGA can control a pixel.

The present invention also provides a kind of large-scale scan-type body 3 D video display system, comprise 220V alternating current machine, 30 described scan-type volumetric 3 D display systems and the master controller based on microprocessor, wherein 30 scan-type volumetric 3 D display systems are divided into four row close-packed arrays, and mutual is overlapping between adjacent scan-type volumetric 3 D display system, 220V alternating current machine is connected with each motor in 30 scan-type volumetric 3 D display systems, and the master controller based on microprocessor is connected with 30 scan-type volumetric 3 D display systems by radio communication.

The present invention also provides a kind of scan-type body 3 D video method for displaying and imaging, and adopt above-mentioned scan-type volumetric 3 D display system to carry out imaging operation, operating procedure is as follows:

1) three-dimensional image segmentation, use algorithm to split image according to the three-dimensional coordinate of two-dimensional space, determine the image that each subsystem is got, step is:

A summit is detected: for searching the subsystem that those comprise polygon vertex, adopts the algorithm like binary search to search;

B rim detection: search the subsystem contacted with polygon edge according to the polygon vertex of having good positioning in step a, a summit determines the direction of polygon edge to another summit, then tests adjacent polygon according to this direction and polygonal angle;

C level is filled: according to the polygon vertex determined in step a and b and edge, find the subsystem being positioned at polygonal internal, then fill.

2) 3-D view is played up, and step is:

A polygon edge is drawn, edge drafting module is realized by arranging state machine within hardware, module first calculates the maximum number point of destination that composition line segment needs, then module calculates the coordinate difference in line segment between consecutive points, then from the starting point of line segment, calculate the coordinate of next point in cartesian coordinate system, finally by coordinates rotating algorithm below polygonal edge transition to cylindrical-coordinate system;

B adds polygonal edge drawn in step a, and this process draws whole polygon, the still edge drafting module used in hardware, and it draws whole polygon with polygon vertex information for inputting;

C Hardware Render, this process is completed by Hardware Render module.

Wherein, 3D rendering frame data are stored in master controller, then after carrying out Iamge Segmentation, the polygon information data of correspondence image are distributed to subsystem, subsystem is received by bottom FPGA, pass to the rotation FPGA of subsystem after carrying out secondary splitting again after bottom FPGA receives data, finally the rotation FPGA of this subsystem passes to corresponding image-generating unit plate array by signal distribution board the polygon data after segmentation, is played up and imaging by 3-D view.

Instant invention overcomes current this area imaging technique and cannot reach large-sized difficulty, and achieve the complete dynamic 3D video of display; The pixel obtained, apart from being 10mm, having reached the resolution of current electronic bill-board and electronic timer, and has played up by data are carried out segmentation; Achieve the display of large-scale body three-dimensional display and real-time full dynamic 3 D video; And the present invention is reliable, compact conformation, stability is high.

Accompanying drawing explanation

Fig. 1 is the structural representation of scan-type volumetric 3 D display system;

Fig. 2 is the structural representation of large-scale scan-type body 3 D video display system;

Fig. 3 is the vertical view of large-scale scan-type body 3 D video display system;

Fig. 4 is scan-type volumetric 3 D display system schematic diagram;

Fig. 5 is scan-type volumetric 3 D display system cylindrical coordinate used;

Fig. 6 is the algorithm block diagram of scan-type volumetric 3 D display system;

Fig. 7 is the schematic diagram of the identical three column scan formula volumetric 3 D display systems in overlapping region;

Fig. 8 is that common intersection point is at (x ₀, y ₀) time the schematic diagram of three column scan formula volumetric 3 D display systems;

Fig. 9 is the schematic diagram of the seven column scan formula volumetric 3 D display system anglecs of rotation;

Figure 10 is for having the schematic diagram of the scan-type volumetric 3 D display system of different imaging panel number (n).

Embodiment

Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are further described.

Embodiment (one):

See Fig. 1, a kind of scan-type volumetric 3 D display system, comprise motor 1, electric power system 2, bottom FPGA3, machinery mount 4, slip-ring device 5, switch power supply system 6, rotate FPGA7, signal distribution board 8 and image-generating unit plate array 9, wherein, electric power system 2 connects motor 1 and bottom FPGA3 respectively by power line, it is inner that motor 1 and bottom FPGA3 are arranged at machinery mount 4, and the shaft extension of motor 1 aims at the center on machinery mount 4 top; Slip-ring device 5 is a disc slab construction, and slip-ring device 5 is positioned at the center of machinery mount upper end, and is connected with the shaft extension of motor 1; Switch power supply system 6, rotation FPGA7, signal distribution board 8 and image-generating unit plate array 9 are separately fixed on the flat board on slip-ring device 5, signal distribution board 8 is positioned at the home position of the flat board on slip-ring device 5, and be connected with rotation FPGA7, rotate FPGA7 and be connected with the upper surface of slip-ring device 5; Image-generating unit plate array 9 is connected with signal distribution board 8 and is fixed in signal distribution board 8; Switch power supply system 6 is connected with image-generating unit plate array 9 with rotation FPGA7, signal distribution board 8 respectively.

Wherein, bottom FPGA3 uses the FPGA of XilinxSpartan-3E model, and this FPGA can provide three functional modules: data communication module; Command decode and control module; Data encapsulation module.

Wherein, image-generating unit plate array 9 selects the FPGA of XilinxVirtex-5XC5VLX30T model, and this FPGA has 360 I/O ports, and wherein 300 I/O ports are used for imaging control, and remaining I/O port is used for control bus and data/address bus; Each pixel is made up of 3 light-emitting diodes, and each FPGA can control 100 pixels.

Embodiment (two):

See Fig. 2, Fig. 3, what Fig. 2, Fig. 3 showed is an alternative embodiment of the invention, i.e. a kind of large-scale scan-type body 3 D video display system, comprise a 220V alternating current motor, the master controller 11 based on microprocessor, a scan-type volumetric 3 D display system array, wherein scan-type volumetric 3 D display system array is made up of base unit and rotary unit.

See Fig. 4, base unit comprises a motor 1, electric power system 2, bottom FPGA3 and machinery mount 4 forms.And rotary unit rotates FPGA7, a signal distribution board 8 and image-generating unit plate array 9 by a switch power supply system 6.Couple together with a slip-ring device 5 between base unit and rotary unit.Described electric power system 2 connects motor 1 and described bottom FPGA3 is also their power supplies, and fixes with described machinery mount 4, the base unit described in formation.Described Switching Power Supply is 6 connection described rotation FPGA7, described signal distribution board 8 and described image-generating unit plate array 9 and is they power supplies, described rotation FPGA7 is connected with described signal distribution board 8 and communicates, and described signal distribution board 8 is connected with described image-generating unit plate array 9 and communicates, the rotary unit described in so just forming.

Utilize described slip-ring device 5 described base unit and described rotary unit to be linked together and form single scan-type volumetric 3 D display system 10, then utilize multiple scan-type body display system 10 to form described scan-type body display system array, single scan-type volumetric 3 D display system 10 is called row of described scan-type body display system array.Described master controller 11 carries out image data transmission by the array of radio communication and described scan-type volumetric 3 D display system 10.Described 220V alternating current motor is connected with the motor 1 of described scan-type body display system array respectively.

Wherein Fig. 3 illustrates the vertical view of the present invention's medium-and-large-sized scan-type body 3 D video display system, and shape is rectangle.This system is made up of 30 scan-type volumetric 3 D display systems, and parameter is long 122.5cm, wide 55cm, high 140cm.The number of the imaging panel of single scan-type volumetric 3 D display system 10 is two, and radius is 10cm.

Embodiment (three): a kind of scan-type body 3 D video method for displaying and imaging, adopt above-mentioned scan-type volumetric 3 D display system 10 to carry out imaging operation, operating procedure is as follows:

1) three-dimensional image segmentation, use algorithm to split image according to the three-dimensional coordinate of two-dimensional space, determine the image that each subsystem is got, step is:

A, summit is detected: for searching the subsystem that those comprise polygon vertex, adopt a kind of algorithm of similar binary search to search;

B, rim detection: search the subsystem contacted with polygon edge according to the polygon vertex of having good positioning in step a, a summit determines the direction of polygon edge to another summit, then tests adjacent polygon according to this direction and polygonal angle;

C, level is filled: according to the polygon vertex determined in step a and b and edge, find the subsystem being positioned at polygonal internal, then fill.

2) 3-D view is played up, and step is:

A, polygon edge is drawn, edge drafting module is realized by arranging state machine within hardware, module first calculates the maximum number point of destination that composition line segment needs, then module calculates the coordinate difference in line segment between consecutive points, then, from the starting point of line segment, the coordinate of next point in cartesian coordinate system is calculated, finally by coordinates rotating algorithm below polygonal edge transition to cylindrical-coordinate system;

B, adds polygonal edge drawn in step a, and this process draws whole polygon, the still edge drafting module used in hardware, and it draws whole polygon with polygon vertex information for inputting;

C, Hardware Render, this process is completed by Hardware Render module.

Master controller 11 li stores 3D rendering frame data, then after carrying out Iamge Segmentation, the polygon information data of correspondence image are distributed to subsystem, subsystem is received by bottom FPGA3, the rotation FPGA7 of subsystem is passed to after carrying out secondary splitting again after bottom FPGA3 receives data, finally the rotation FPGA7 of this subsystem passes to corresponding image-generating unit plate 9 by signal distribution board 8 the polygon data after segmentation, is played up and imaging by 3-D view.

Make comparatively detailed schematic to technical scheme of the present invention below to illustrate:

See figure, 5, for single scan-type volumetric 3 D display system 10, described image-generating unit plate 9 array, as a display floater, defines a cylindrical voxel mesh space by rotating this display floater.The voxel coordinate be in wherein can describe by following three parameters: the radius r of 1 distance center rotating shaft; 2 horizontal polar angle θ; 3 apex height z.

The algorithm principle of the present embodiment is the data message allowing scan-type volumetric 3 D display system 10 directly accept polygon vertex, then activates the corresponding voxel being positioned at cylindrical voxel mesh space.System make use of the persistence of vision effect of human eye, and all voxels are all activated at synchronization observer can be allowed to think by fast rotational, thus form three-dimensional imaging in cylindrical space.See Fig. 6, wherein two main modular are: 1 polygon cross detection; 2 radial polygons are filled.

Described polygon cross detection is used to find and forms polygonal edge.First, any line segment can be defined in three Cartesian coordinates, as follows:

$\left\{\begin{array}{c}x=x_0+\frac{t(x_1-x_0)}{P},t:0\→P,P\∈Z^{+}\\ y=y_0+\frac{t(y_1-y_0)}{P},t:0\→P,P\∈Z^{+}\\ z=z_0+\frac{t(z_1-z_0)}{P},t:0\→P,P\∈Z^{+}\end{array}\right.---\left(1\right)$

(1) x in, y and z are the coordinates corresponding to t in line segment P, and x0, y0 and z0 are end points of line segment, and x1, y1 and z1 are another end points of line segment.Algorithm is searched for from the line segment on any limit of polygon, records the voxel coordinate intersected with polygon.And then go below Coordinate Conversion to cylindrical-coordinate system.

The formula that the cartesian coordinate system of standard forwards cylindrical-coordinate system to is as follows:

$\left\{\begin{array}{cc}r=\sqrt{x^2+y^2}& \\ \mathrm{\θ}=\arctan (y,x)& \mathrm{\θ}\∈(-\mathrm{\π},\mathrm{\π}]\\ z=z& \end{array}\right.---\left(2\right)$

Precision due to native system is 64*64, and rotates a circle and interiorly can show 1024 cross sections.The coordinate information discretization that will be drawn by (2) more thus, namely rounds, and discretization formula is as follows:

$\left\{\begin{array}{c}v=\mathrm{round}(r-5),v\∈\left[\mathrm{0,63}\right]\\ s=\mathrm{round}(\mathrm{\θ}\×\frac{512}{\mathrm{\π}}),s\∈[\mathrm{0,1023}\\ h=\mathrm{round}(3015-z),h\∈\left[\mathrm{0,63}\right]\end{array}\right.---\left(3\right)$

Radial polygon filling process is then the vertex information discrete circular cylindrical coordinate that polygon cross detection finally draws being changed into planar polygons, then two-dimensional rectangle drafting is carried out, finally carry out third dimension pixel filling, here use the ray-tracing algorithm of a standard, the inside has used jordan curve theorem.

Large-scale scan-type body 3 D video display system is made up of many single scan-type volumetric 3 D display systems 10.See Fig. 7, Figure 7 shows that the system be made up of 3 scan-type body display systems.With A (a, b) for reference, A is rotated counterclockwise 120 degree around initial point and forms B, and continuing to turn clockwise 120 degree then forms C.Certain transformation for mula that a bit (x, y) is rotated counterclockwise θ degree angle around initial point is x '=xcos θ-ysin θ and y '=xsin θ+ycos θ, is expressed in matrix as:

$\left[\begin{array}{c}{x}^{\′}\\ y^{\′}\end{array}\right]=\begin{array}{c}\left[\begin{array}{cc}\cos \mathrm{\θ}& -\sin \mathrm{\θ}\\ \sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]\end{array}---\left(4\right)$

Calculate the centre coordinate of B is by (4),

The centre coordinate of C is,

Joining between row can by simultaneous once equation calculate,

$\left\{\begin{array}{c}{(x-a)}^2+{(y-b)}^2=R^2\\ {(x+\frac{a+\sqrt{3}b}{2})}^2+{(y+\frac{y-\sqrt{3}a}{2})}^2=R^2\\ {(x+\frac{a-\sqrt{3}b}{2})}^2+{(y+\frac{b+\sqrt{3}a}{2})}^2=R^2\end{array}\right.---\left(5\right)$

The joining going out A and B calculated is the joining of A and C is the joining of B and C is (-a ,-b).Be (x for center intersection point ₀, y ₀) when, as shown in Figure 8, then the central point of A, B and C and joining will make corresponding change, as shown in equation (6) (7),

$\left\{\begin{array}{c}{a}_{\mathrm{cent}}=(a,b)\\ b_{\mathrm{cent}}=(-\frac{a-x_0}{2}-\frac{\sqrt{3}(b-y_0)}{2}+x_0,\frac{\sqrt{3}(a-x_0)}{2}-\frac{b-y_0}{2}+y_0)\\ c_{\mathrm{cent}}=(-\frac{a-x_0}{2}+\frac{\sqrt{3}(b-y_0)}{2}+x_0,-\frac{\sqrt{3}(a-x_0)}{2}-\frac{b-y_0}{2}+y_0)\end{array}\right.---\left(6\right)$

$\left\{\begin{array}{c}\mathrm{ab}=(\frac{a-x_0}{2}-\frac{\sqrt{3}(b-y_0)}{2}+x_0,\frac{\sqrt{3}(a-x_0)}{2}+\frac{b-y_0}{2}+y_0)\\ \mathrm{ac}=(\frac{a-x_0}{2}+\frac{\sqrt{3}(b-y_0)}{2}+x_0,-\frac{\sqrt{3}(a-x_0)}{2}+\frac{b-y_0}{2}+y_0)\\ \mathrm{bc}=(-a+2x_0,-b+2y_0)\end{array}\right.---\left(7\right)$

Large-scale scan-type body 3 D video display system will be guaranteed can not collide between subsystems (single scan-type volumetric 3 D display system 10) when designing.All subsystems must synchronous operation, and the anglec of rotation between adjacent system is different, can guarantee to only have a system can through overlapping region like this at synchronization.A schematic diagram utilizing the anglec of rotation to carry out collision free is described see Fig. 9, Fig. 9.

In the present invention's design, important parameter is the number of imaging panel in individual system, represents with n.This parameter determines the number of times that each voxel is activated in rotating a circle.See Figure 10, Figure 10 shows that the system schematic under different n.Human visual perception system requirements 30 frames at least per second just can think that video playback is smooth.In order to reach this object, the imaging panel of an one side needs at least rotation 3600 turns per minute, uses back-to-back double sided board in the present invention, as long as at least rotation 1800 turns per minute is like this just passable.Equation (8) can calculate the angular speed reached required by 30 hertz of refresh rates,

$\mathrm{\ω}=\frac{3600\mathrm{rpm}}{n*p}---\left(8\right)$

Wherein, n is expressed as the number of image panel, and p represents the number (p=1,2) of imaging pane in each imaging panel, angular speed when ω is system rotation.

Under the prerequisite of 30 hertz of refresh rates, the centripetal force that system requirements is minimum.Below the equation calculating centripetal force,

Suppose m=1, then f _{centripetal force}=C ω ²r, wherein C=10.966*10 ^-3be a Units conversion factor, m is quality, and ω is angular speed, and r is radius.The acceleration that individual system rotates equation below calculates,

$a=\frac{C}{9.81}{\mathrm{\ω}}^{2}r=C_g{\mathrm{\ω}}^{2}r---\left(10\right)$

Wherein C _g=1.11786*10 ^-3a conversion coefficient, g=9.81m/s ², namely a is acceleration.

Have centripetal force to produce centrifugal force, system must minimize centrifugal force in order to avoid system is disintegrated when rotated.At using formula f _{centripetal force}=C ω ²r the condition of bringing system in the present invention into can be calculated the centrifugal force of system when rotating is 888.264N, and it is 90.55g, g=9.81m/s that acceleration formula (10) calculates ².Data show that the value of system centripetal force is very safe, can guarantee that system can not be disintegrated when rotated.

Fig. 3 illustrates the vertical view of the present invention's medium-and-large-sized scan-type body 3 D video display system, and shape is rectangle.This system is made up of 30 scan-type volumetric 3 D display systems, and parameter is long 122.5cm, wide 55cm, high 140cm.The number of the imaging panel of single scan-type volumetric 3 D display system 10 is two, and radius is 10cm.Because single subsystem is circular, so global shape is not the rectangle of rule, by algorithm, the part of rectangular periphery in viewing area can be got rid of.

Three-dimensional image segmentation algorithm comprises three steps: summit is detected; Rim detection; Horizontal polygonal is filled.Wherein summit is detected for finding that those comprise the individual system of polygon vertex, and rim detection is for finding the individual system contacted with polygon edge, and it is then find the individual system being positioned at polygonal internal that horizontal polygonal is filled, and then fills.

Three-dimensional rendering algorithm comprises three steps: 1 carries out polygon edge drafting in hardware; All polygonal edges are added in hardware; Hardware Render.

After being played up by three-dimensional image segmentation and 3-D view, system can produce a three dimensional image frames being less than 33.3ms, and refresh rate reaches 30fps, achieves the smoothness display of 3 D video.

Above are only several preferred implementation of the present invention, be to be noted that for the those of ordinary skill in the industry, can be improved by some and replace under principle of the present invention, this improvement and replacement also should be considered as protection scope of the present invention.

Claims (6)

1. a scan-type volumetric 3 D display system, it is characterized in that: comprise motor (1), electric power system (2), bottom FPGA(3), machinery mount (4), slip-ring device (5), switch power supply system (6), rotate FPGA(7), signal distribution board (8) and image-generating unit plate array (9)

Wherein, electric power system (2) connects motor (1) and bottom FPGA(3 respectively by power line), motor (1) and bottom FPGA(3) be arranged at machinery mount (4) inside, the shaft extension of motor (1) aims at the center on machinery mount (4) top;

Slip-ring device (5) is a disc slab construction, and slip-ring device (5) is positioned at the center of machinery mount upper end, and is connected with the shaft extension of motor (1);

Switch power supply system (6), rotate FPGA(7), signal distribution board (8) and image-generating unit plate array (9) be separately fixed on the flat board on slip-ring device (5), signal distribution board (8) is positioned at the home position of the flat board on slip-ring device (5), and with rotation FPGA(7) be connected, rotation FPGA(7) be connected with the upper surface of slip-ring device (5);

Image-generating unit plate array (9) is connected with signal distribution board (8) and is fixed in signal distribution board (8);

Switch power supply system (6) respectively with rotation FPGA(7), signal distribution board (8) is connected with image-generating unit plate array (9).

2. a kind of scan-type volumetric 3 D display system according to claim 1, is characterized in that: bottom FPGA(3) use the FPGA of XilinxSpartan-3E model, this FPGA can provide three functional modules: data communication module; Command decode and control module; Data encapsulation module.

3. a kind of scan-type volumetric 3 D display system according to claim 1, it is characterized in that: image-generating unit plate array (9) selects the FPGA of XilinxVirtex-5XC5VLX30T model, this FPGA has 360 I/O ports, wherein 300 I/O ports are used for imaging control, and remaining I/O port is used for control bus and data/address bus; Each pixel is made up of 3 light-emitting diodes, and each FPGA can control 100 pixels.

4. one kind large-scale scan-type body 3 D video display system, comprise 220V alternating current machine, 30 described scan-type volumetric 3 D display systems (10) and the master controller (11) based on microprocessor, it is characterized in that: wherein 30 scan-type volumetric 3 D display systems (10) are divided into four row close-packed arrays, and mutual is overlapping between adjacent scan-type volumetric 3 D display system (10), 220V alternating current machine is connected with each motor (1) in 30 scan-type volumetric 3 D display systems (10), master controller (11) based on microprocessor is connected with 30 scan-type volumetric 3 D display systems (10) by radio communication.

5. a scan-type body 3 D video method for displaying and imaging, adopt above-mentioned scan-type volumetric 3 D display system (10) to carry out imaging operation, operating procedure is as follows:

1) three-dimensional image segmentation, use algorithm to split image according to the three-dimensional coordinate of two-dimensional space, determine the image that each subsystem is got, step is:

A summit is detected: for searching the subsystem that those comprise polygon vertex, adopts the algorithm like binary search to search;

B rim detection: search the subsystem contacted with polygon edge according to the polygon vertex of having good positioning in step a, a summit determines the direction of polygon edge to another summit, then tests adjacent polygon according to this direction and polygonal angle;

C level is filled: according to the polygon vertex determined in step a and b and edge, find the subsystem being positioned at polygonal internal, then fill;

2) 3-D view is played up, and step is:

A polygon edge is drawn, edge drafting module is realized by arranging state machine within hardware, module first calculates the maximum number point of destination that composition line segment needs, then module calculates the coordinate difference in line segment between consecutive points, then from the starting point of line segment, calculate the coordinate of next point in cartesian coordinate system, finally by coordinates rotating algorithm below polygonal edge transition to cylindrical-coordinate system;

B adds polygonal edge drawn in step a, and this process draws whole polygon, the still edge drafting module used in hardware, and it draws whole polygon with polygon vertex information for inputting;

C Hardware Render, this process is completed by Hardware Render module.

6. a kind of scan-type body 3 D video method for displaying and imaging according to claim 5, it is characterized in that: master controller (11) is inner stores 3D rendering frame data, then after carrying out Iamge Segmentation, the polygon information data of correspondence image are distributed to subsystem, subsystem is by bottom FPGA(3) receive, bottom FPGA(3) receive data after carry out secondary splitting again after pass to the rotation FPGA(7 of subsystem), the finally rotation FPGA(7 of this subsystem) by signal distribution board, the polygon data after segmentation is passed to corresponding image-generating unit plate array (9), played up and imaging by 3-D view.