CN103135331A - Active-type arbitrary direction three-dimensional projector - Google Patents

Abstract

The invention discloses an active-type arbitrary direction three-dimensional projector. The active-type arbitrary direction three-dimensional projector comprises a positioning and measuring device, a cylindrical surface grating screen and a projector body, wherein the positioning and measuring device comprises a machine vision device, a distance and angle measurement device and a telescopic rod which is connected with the positioning and measuring device and a metal rod; the cylindrical surface grating screen comprises an obverse grating, a diffusion layer and a reverse grating, and the cylindrical surface grating screen is used for forming a parallax error area; the projector body comprises two projection machines and the metal rod which connects the two projection machines, the two projection machines are located in the same horizontal plane all the time, the distances from the two projection machines to the cylindrical surface grating screen keep identical, and the two projection machines have a camera lens displacement function; one end of the telescopic rod is fixed on the positioning and measuring device, and the other end of the telescopic rod is connected with the metal rod and can move toward the direction of either of the two projection machines. The active-type arbitrary direction three-dimensional projector can conduct self regulation of positions and projection angles continuously through the two projection machines and provides active-type arbitrary direction projection display effects which are the best no matter where a viewer is located.

Description

A kind of active arbitrary orientation three-dimensional projection device

Technical field

The present invention relates to a kind of based on the geographical virtual emulation display device in the real space of GIS technology, RS technology and stereo projection technology, particularly a kind of active arbitrary orientation three-dimensional projection device.

Background technology

stereo projection technology is through years of researches, developed multiple stereo projection display apparatus, at present in the multi-viewpoint three-dimensional optical projection system, what adopt is cylindrical grating formula large screen projection structure, mainly to utilize the imaging characteristic of cylindrical grating to make the image of two institutes of projector projection can only image in respectively the viewing area of left eye or right eye, form parallax in human eye, thereby for human eye provides stereo-picture, the projection pattern of this passive type is watched the restriction of condition, be that the beholder is in certain position, stereoeffect and brightness are best, and after the beholder moves, three-dimensional effect disappears, although can provide many viewpoints by the number that increases projector, but the 3 D stereo that can not realize arbitrary orientation shows, and along with increasing of projector's quantity, hardware cost is higher.

Therefore, realizing the stereoprojection of active arbitrary orientation as how minimum projector's quantity, thereby the drop shadow effect of comprehensive the best is provided, is 3 D stereo projection problem demanding prompt solution.

Summary of the invention

The objective of the invention is to overcome present passive type single view projection pattern technical costs high, watch the restricted deficiency of condition, in conjunction with GIS technology, RS technology and stereo projection technology, provide a kind of active arbitrary orientation three-dimensional projection device.

Thinking of the present invention: in tripleplane shows, simultaneously demonstrate left image and right image on screen, make people's left eye can only see left image by device, right eye can only be seen right image, be reduced into stereo-picture through the brain fusion again, namely realize the projection of active arbitrary orientation 3 D stereo.

The present invention is achieved in that a kind of active arbitrary orientation three-dimensional projection device, comprise positioning measuring device, cylindrical grating screen and projection arrangement, wherein positioning measuring device comprises machine vision device, range finding angle-measuring equipment and the expansion link that connects positioning measuring device and Metallic rod, and positioning measuring device is fixed on directly over the cylindrical grating screen centerline, and its function is also followed the tracks of eyes, measured the distance of human eye and this device and take measurement of an angle in the location for identification people face; The cylindrical grating screen comprises front grating, diffusing layer and back side grating, and the acting as of cylindrical grating screen forms the parallax zone; Projection arrangement comprises 2 projectors and the Metallic rod that is connected two projectors, and 2 projectors are on same level always, and keeps equating from the distance of cylindrical grating screen, and 2 projectors are with the lens displacement function; Described expansion link one end is fixed on positioning measuring device, other end connection metal bar and moving to any one direction in two projectors.

Image-pickup device in described machine vision device will absorb target and convert picture signal to, sending image processing system to carries out computing with identification people's face and determines position of human eye, thereby control positioning measuring device and aim at human eye, the positive location of realization to beholder's human eye, and measure positioning measuring device to the distance of human eye, positioning measuring device to human eye direction and surface level angle and positioning measuring device to human eye direction and screen angle; Computer program calculates the rotation amount of two projector lens that expansion link deflection angle, expansion link be connected with Metallic rod link displacement, expansion link stroke and Metallic rod automatically according to the measured value that obtains, system adjusts automatically according to calculating parameter, make the corresponding change in position of two projectors of Metallic rod connection, the people who enters the observation area is on the zone that forms parallax all the time.

The present invention calculates by a series of programs, two projectors adjust position and projection angle by continuous oneself, and the Projection Display of active arbitrary orientation is provided, and no matter the people is wherein, display effect is all best, and not needing increases the viewpoint scope by increasing projector's quantity; This device mainly is applicable to three-dimensional scenic to the solid show of one or more niche audiences, the corresponding spectators of every complete equipment, and spectators be in differing heights simultaneously a plurality of spectators watch simultaneously.

Description of drawings:

Fig. 1 is that apparatus of the present invention consist of schematic diagram.

Mark in figure: 1-positioning measuring device; 2-cylindrical grating screen; The 3-projection arrangement, 31-1 projector, 32-2 projector, 33-Metallic rod; The 4-expansion link.

Fig. 2 is structure and the action principle schematic diagram of the cylindrical grating screen of apparatus of the present invention.

Mark in figure: 2-cylindrical grating screen, 21-front grating, 22-diffusing layer, 23-back side grating; 31-1 projector, 32-2 projector; The 5-human eye.

Fig. 3 is major parameter schematic diagram in the embodiment of the present invention.

Mark in figure: 2-cylindrical grating screen; 31-1 projector, 32-2 projector; 6-people's face.

Fig. 4 finds the solution expansion link and Metallic rod link partial parameters schematic diagram in the embodiment of the present invention.

Mark in figure: 2-cylindrical grating screen; 31-1 projector, 32-2 projector; The 5-human eye; 7-is direction from left to right.

Fig. 5 finds the solution projector's partial parameters schematic diagram in the embodiment of the present invention, wherein a figure represents No. 1 projector's part, No. 2 projector's parts of b figure expression.

Mark in figure: 2-cylindrical grating screen; 31-1 projector, 32-2 projector; 7-is direction from left to right.

Fig. 6 is that embodiment of the present invention device changes schematic diagram.

Embodiment

Embodiment:

As shown in Figure 1, 2, 3, a kind of active arbitrary orientation three-dimensional projection device, comprise positioning measuring device 1, cylindrical grating screen 2 and projection arrangement 3, wherein positioning measuring device 1 comprises machine vision device, range finding angle-measuring equipment and the expansion link 4 that connects positioning measuring device 1 and Metallic rod 33, and positioning measuring device 1 is fixed on directly over cylindrical grating screen 2 center lines, and its function is followed the tracks of eyes, measured the distance of human eye 5 and this device and take measurement of an angle for identifying people's face 6 and location; Cylindrical grating screen 2 comprises front grating 21, diffusing layer 22 and back side grating 23; The effect of cylindrical grating screen 2 is formation parallax zones; Projection arrangement 3 comprises that No. 1 projector 31, No. 2 33, No. 1 projectors 31 of projector 32 and the Metallic rod that is connected two projectors and No. 2 projectors 32 are on same level always, and keeps equating from the distance of cylindrical grating screen 2; No. 1 projector 31 and No. 2 projectors 32 are with the lens displacement function; Described expansion link 4 one ends are fixed on positioning measuring device 1, other end connection metal bar 33 and moving to any one direction in two projectors.

Image-pickup device in described machine vision device will absorb target and convert picture signal to, sending image processing system to carries out computing with identification people face 6 and determines human eye 5 positions, thereby control positioning measuring device 1 and aim at human eye 5, the positive location of realization to beholder's human eye 5, and measure positioning measuring device 1 and arrive human eye 5 directions and screen angle to the distance of human eye 5, angle and the positioning measuring device 1 that positioning measuring device 1 arrives human eye 5 directions and surface level; Computer program calculates expansion link 4 deflection angles, expansion link 4 and the stroke of Metallic rod 33 link displacements, expansion link 4 and the rotation amount of two projector lens that Metallic rod 33 is connected automatically according to the measured value that obtains, system adjusts automatically according to calculating parameter, make the corresponding change in position of two projectors of Metallic rod 33 connections, the people who enters the observation area is on the zone that forms parallax all the time.

The principle of work of the present embodiment is (with reference to the accompanying drawings shown in 3,4,5 and 6):

(1) observer enters the observation area, and positioning measuring device 1 is started working, and identification people face 6 is also located human eye 5; Measure and record: positioning measuring device 1 is to human eye 5 directions and horizontal plane angle α ₁, positioning measuring device 1 is to human eye 5 directions and screen angle α ₂, positioning measuring device 1 and people distance L ₁

Get primary data: α ₁=45 °, α ₂=80 °, L ₁=8.5 meters;

Get the people and move rear data: α ₁=30 °, α ₂=70 °, L ₁=9.5 meters.

(2) measured value that obtains according to step (1) of computer program calculates and record automatically: expansion link 4 and screen angle α ₃, expansion link 4 length L ₄, expansion link 4 and Metallic rod 33 links are from the distance c of No. 2 projectors 32, No. 1 projector's 31 lens direction and screen vertical direction angle β ₁, No. 2 projector's 32 lens directions and screen vertical direction angle be β ₂

Metallic rod 33 is long is S, the screen length L ', human eye 5 and ground level H ₁=projector terrain clearance, positioning measuring device 1 terrain clearance H ₂, positioning measuring device 1 is H to the distance of the surface level at human eye 5 and projector place, human eye is to screen distance L ₂, projector is to screen distance L ₃, L ₁Projection L on surface level ₁', L ₄Projection L on surface level ₄', positioning measuring device 1 subpoint on surface level is made the vertical line L of human eye 5 and projector's line ₅(overlapping with screen), No. 1 projector's 31 camera lenses are Y to the vertical projection point of screen and the distance of screen right-hand member ₁, No. 2 projector's 32 camera lenses are Y to the vertical projection point of screen and the distance of screen right-hand member ₂

Get the long L ' of screen=8 meters, the long S=1 rice of Metallic rod 33, positioning measuring device 1 terrain clearance H ₂=5 meters.

According to calculating formula:

$\left\{\begin{array}{c}H=L_1*{\sin \mathrm{\α}}_1\\ H_1=H_2-H\end{array}\right.$ (projector's terrain clearance is fixed as H ₁)

L ₅＝L ₁*cosα ₁*cosα ₂

Expansion link 4 is as follows with the calculation of parameter of Metallic rod 33 link parts:

$c=(\frac{1}{2}{L}^{\′}-L_5)*\frac{S}{L^{\′}}$

The calculation of parameter of expansion link 4 parts is as follows:

${\mathrm{\α}}_3=\arctan |(1+S/L^{\′})*{\tan \mathrm{\α}}_2|$

$L_4=\frac{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="1303132313594.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\sin {\mathrm{\&alpha;}}_1}{\sin \left\{\arctan \right[\sin {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_3/\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})\left]\right\}}$

The calculation of parameter of projector's part is as follows:

${\mathrm{\&beta;}}_1=\arctan \frac{|c-L_5-S|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="1303132313594.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*{\cos \mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})}$

${\mathrm{\&beta;}}_2=\arctan \frac{|c-{\mathrm{<figure-callout\; id="5"\; label="L"\; filenames="1303132313592.png"\; state="\{\{state\}\}">L</figure-callout>}}_5|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="1303132313594.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*{\cos \mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})}$

(3) calculate following data according to step (2):

?

α 3(°)

L 4(m)

c(m)

β 1(°)

β 2(°)

Primary data	81.092	9.031	0.369	14.112	5.781
						Data after mobile	72.072	10.302	0.148	22.853	17.039
Difference △	9.02	-1.217	0.221	-8.741	-11.258

As accompanying drawing 6, dotted line is original state, and solid line is state after mobile: expansion link 4 lefts to beat 9.02 °, expansion link 4 extended 1.217 meters, link and move 0.221 meter, No. 1 projector's 31 camera lens rights to No. 2 projectors 32 and rotated 11.258 ° of 8.741 °, No. 2 projector's 32 camera lens rights rotations; Program is adjusted automatically according to the difference amount, thereby adjust the angle of projector position and camera lens, the assurance camera lens is aimed at the center line of screen all the time, make the people in mobile, two projectors can be along with movement, the people is on the zone that forms parallax all the time, namely realizes the projection of active arbitrary orientation 3 D stereo.

Projector moves forward and backward the variation of the display image screen size that causes, solves by computing machine auto zoom image, and scaling I is the L after being subjected to displacement ₃With L before ₃Ratio, i.e. I=L _{After 3}/ L _{Before 3}, L wherein ₃=L ₅* tan α ₃, image size=Scale _{Original image}* I.

Get Scale _{Original image}=1200*800pi calculates L _{Before 3}=6.6590 meters, L _{After 3}=8.6974 meters, get I=1.3061, Scale _{Original image}=1567*1045pi.

Claims (1)

1. active arbitrary orientation three-dimensional projection device, it is characterized in that active arbitrary orientation three-dimensional projection device comprises positioning measuring device (1), cylindrical grating screen (2) and projection arrangement (3), wherein positioning measuring device (1) comprises machine vision device, range finding angle-measuring equipment and the expansion link (4) that connects positioning measuring device (1) and Metallic rod (33), and positioning measuring device (1) is fixed on directly over cylindrical grating screen (2) center line, its function is identification people's face (6) and location tracking eyes, measure the distance of human eye (5) and this device and take measurement of an angle, cylindrical grating screen (2) comprises front grating (21), diffusing layer (22) and back side grating (23), the effect of cylindrical grating screen (2) is formation parallax zone, projection arrangement (3) comprises 2 projectors (31), (32) and the Metallic rod that is connected two projectors (33), 2 projectors (31), (32) are on same level always, and keep equating from the distance of cylindrical grating screen (2), 2 projectors (31), (32) are with the lens displacement function, described expansion link (4) one ends are fixed on positioning measuring device (1), other end connection metal bar (33) and moving to any one direction in two projectors.

Images