CN103149787A - Active optional direction three-dimensional stereoprojection method - Google Patents

Abstract

The invention discloses an active optional direction three-dimensional stereoprojection method. An active optional direction three-dimensional stereoprojection device is arranged and comprises a positioning measurement device, a cylindrical grating screen and a projecting device, wherein the positioning measurement device identifies the face of an observer and positions the eyes; the distance from the device to the eyes, the included angle between the direction from the device to the eyes and the horizontal plane, and the included angle between the direction from the device to the eyes and the screen can be measured through a measuring function; a computer program automatically computes the other parameters, i.e. the swing angle of a telescopic rod, the moving distance between the telescopic rod and the connecting end of a metal rod, the retraction and stretching amount of the telescopic rod, and the rotation degree of two projector lenses according to acquired measurement values; and the system automatically adjusts according to the computed parameters, and the position of a projector is changed correspondingly, so that a moving person is always in the area in which optical parallax is formed, and three-dimensional stereoprojection is realized. An active optional direction projection display effect can be achieved, and the display effect is the best no matter where the person is.

Description

A kind of active arbitrary orientation 3 D stereo projecting method

Technical field

The invention belongs to the stereo projection technology field, particularly a kind of active arbitrary orientation 3 D stereo projecting method.

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 projecting method 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 projecting method 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 3 D stereo projecting method.

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.

Concrete steps are:

(1) a kind of active arbitrary orientation three-dimensional projection device is set, 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.

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

(3) measured value that obtains according to step (2) of computer program calculates and record automatically: expansion link and screen angle α ₃, length of telescopic bar L ₄, expansion link and Metallic rod link be from a projector i.e. distance c, another projector i.e. No. 1 projector lens direction and the screen vertical direction angle β of No. 2 projectors ₁, No. 2 projector lens directions and screen vertical direction angle be β ₂

Connect the long S of being of Metallic rod of two projectors, screen length is L ', human eye and ground level H ₁=projector terrain clearance, positioning measuring device terrain clearance are H ₂, positioning measuring device is H to the distance of the surface level at human eye 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 subpoint on surface level is made the vertical line L of human eye and projector's line ₅, L ₅Overlap with screen, the camera lens of No. 1 projector is Y to the vertical projection point of screen and the distance of screen right-hand member ₁, the camera lens of No. 2 projectors is Y to the vertical projection point of screen and the distance of screen right-hand member ₂

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

The calculation of parameter of expansion link and Metallic rod link part is as follows:

The calculation of parameter of expansion link part is as follows:

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

$L_4=\frac{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\sin {\mathrm{\&alpha;}}_1}{\sin \left\{\arctan \right[\sin {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_3/\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})\left]\right\}}$

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

${\mathrm{\&beta;}}_1=\arctan \frac{|c-L_5-S|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})}$

${\mathrm{\&beta;}}_2=\arctan \frac{|c-{\mathrm{<figure-callout\; id="5"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE002.png"\; state="\{\{state\}\}">L</figure-callout>}}_5|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2(1+S/L^{\&prime;})}$

。

(4) movement is all calculated and records c, α one time according to step (3) each time ₃, L ₄, β ₁, β ₂, the record after movement and the front once difference of record are designated as △ c, △ α ₃, △ L ₄, △ β ₁, △ β ₂, i.e. the rotation amount of expansion link deflection angle, expansion link and Metallic rod link displacement, expansion link stroke, No. 1 and No. 2 projector lens; 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.

Advantage of the present invention: this method is calculated by a series of programs, and two projectors adjust position and projection angle by continuous oneself, realize the Projection Display of active arbitrary orientation, and no matter the people wherein, display effect is all best.

Description of drawings:

Fig. 1 is that the device that the inventive method is used consists 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 the inventive method institute operative installations.

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 of the present invention.

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

Fig. 4 is that the present invention finds the solution expansion link and Metallic rod link partial parameters schematic diagram.

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 is that the present invention finds the solution projector's partial parameters schematic diagram, and 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 Fig. 1-6.

(1) a kind of active arbitrary orientation three-dimensional projection device is set, 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 and Metallic rod 33, and positioning measuring device 1 is fixed on directly over cylindrical grating screen 2 center lines, 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; Cylindrical grating screen 2 comprises front grating 21, diffusing layer 22 and back side grating 23, and the acting as of cylindrical grating screen 2 forms the parallax zone; Projection arrangement comprises No. 1 projector 31, No. 2 projectors 32 and the Metallic rod 33 that is connected two projectors, No. 1 projector 31 and No. 2 projectors 32 are on same level always, and the distance from cylindrical grating screen 2 keep to equate, and 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, send image processing system to and carry out computing with the also definite human eye of identification people face 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 direction 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 the rotation amount of two projector lens that expansion link 4 deflection angles, expansion link 4 are connected with Metallic rod 33 link displacements, expansion link 4 strokes and Metallic rod 33 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.

(2) 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 is to human eye direction 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.

(3) measured value that obtains according to step (2) 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, positioning measuring device terrain clearance H ₂=5 meters.

According to calculating formula:

$\left\{\begin{array}{c}H={\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\sin {\mathrm{\&alpha;}}_1\\ H_1=H_2-H\end{array}\right.$ (projector highly is fixed as H ₁)

L ₅＝L ₁*cosα ₁*cosα ₂

The calculation of parameter of expansion link and Metallic rod link part is as follows:

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

The calculation of parameter of expansion link part is as follows:

${\mathrm{\&alpha;}}_3=\arctan |(1+S/L^{\&prime;})*\tan {\mathrm{\&alpha;}}_2|$

$L_4=\frac{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\sin {\mathrm{\&alpha;}}_1}{\sin \left\{\arctan \right[\sin {\mathrm{\&alpha;}}_1*{\sin \mathrm{\&alpha;}}_3/{\cos \mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})\left]\right\}}$

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

${\mathrm{\&beta;}}_1=\arctan \frac{|c-L_5-S|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2*(1+S/L^{\&prime;})}$

${\mathrm{\&beta;}}_2=\arctan \frac{|c-{\mathrm{<figure-callout\; id="5"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE002.png"\; state="\{\{state\}\}">L</figure-callout>}}_5|}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="2013100790744100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">L</figure-callout>}}_1*\cos {\mathrm{\&alpha;}}_1*\sin {\mathrm{\&alpha;}}_2(1+S/L^{\&prime;})}$

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

?	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 (2)

1. active arbitrary orientation 3 D stereo projecting method is characterized in that concrete steps are:

(1) a kind of active arbitrary orientation three-dimensional projection device is set, 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;

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

(3) measured value that obtains according to step (2) of computer program calculates and record automatically: expansion link and screen angle α ₃, length of telescopic bar L ₄, expansion link and Metallic rod link be from a projector i.e. distance c, another projector i.e. No. 1 projector lens direction and the screen vertical direction angle β of No. 2 projectors ₁, No. 2 projector lens directions and screen vertical direction angle be β ₂

Connect the long S of being of Metallic rod of two projectors, screen length is L ', human eye and ground level H ₁=projector terrain clearance, positioning measuring device terrain clearance are H ₂, positioning measuring device is H to the distance of the surface level at human eye 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 subpoint on surface level is made the vertical line L of human eye and projector's line ₅, L ₅Overlap with screen, the camera lens of No. 1 projector is Y to the vertical projection point of screen and the distance of screen right-hand member ₁, the camera lens of No. 2 projectors is Y to the vertical projection point of screen and the distance of screen right-hand member ₂

According to calculating formula:

The calculation of parameter of expansion link and Metallic rod link part is as follows:

The calculation of parameter of expansion link part is as follows:

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

；

(4) movement is all calculated and records c, α one time according to step (3) each time ₃, L ₄, β ₁, β ₂, the record after movement and the front once difference of record are designated as △ c, △ α ₃, △ L ₄, △ β ₁, △ β ₂, i.e. the rotation amount of expansion link deflection angle, expansion link and Metallic rod link displacement, expansion link stroke, No. 1 and No. 2 projector lens; 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.

2. active arbitrary orientation 3 D stereo projecting method according to claim 1, is characterized in that 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}, wherein

, image size=

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