CN103220482B - A kind of full degree of freedom adjusts the method for projected picture position and size - Google Patents
A kind of full degree of freedom adjusts the method for projected picture position and size Download PDFInfo
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Abstract
The method that a kind of full degree of freedom of the present invention adjusts projected picture position and size, the steps include: to project standardized test chart by DLP；Just projection screen is shot projected picture by CCD；The adjustment amount of the data acquisition convergent-divergent adjustment shot by computer disposal zooms in and out adjustment；Successively to rotate adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment as regulating object, circulation performs following steps and completes the adjustment to projected picture: just projection screen is shot projected picture by CCD, approximate algorithm is utilized to be analyzed the data photographed processing by computer, obtaining adjustment amount corresponding to regulating object and adjustment direction, computer controlled automatic correspondence knob is adjusted.The present invention, by five axial adjustment knobs in computer controlled automatic six axle, accurately adjusts the relative position of ray machine and projection screen, makes projection picture correctly to be in full screen on screen, it is not necessary to manual operation, time saving and energy saving.
Description
Technical field
The present invention relates to optical projection system field, be specifically related to a kind of method that full degree of freedom adjusts projected picture position and size.
Background technology
Digital light treatment technology (DigitalLightingProcessing-DLP) is based on the device of MEMS, it is a kind of to adopt semiconductor fabrication, the device being made up of high-speed figure formula luminous reflectance switch arrays, binary pulse width modulated technology is adopted to accurately control the tonal gradation of light, combined effect plus image procossing, memorizer, light source and optical system, image is projected giant-screen, high brightness, high-contrast, seamless coloured image can be produced.However, to ensure that projection picture can distortionless full frame correctly be shown on screen, it is necessary to the accurate relative position adjusting ray machine and giant-screen.
At present the method for adjustment of ray machine is realized mainly by manual six axial adjustment or electronic six axial adjustment.1, manual six axial adjustment, are fixed on precision optical machinery six axial adjustment platform by DLP, according to projected picture relative position on screen, manually adjust the six axial adjustment platforms side-play amount space six direction (rotating before and after up and down)；2, electronic six axial adjustment, electronic six axles have six axles of A, B, C, D, E, F, the upright position of A axial adjustment image, B axial adjustment image level position, C axle convergent-divergent adjusts, and D axle rotates image, E axle vertical slope adjusts, F axial adjustment picture vertical gradient, the effect of each axle is as it is shown in figure 1, the corresponding motor of each axle is driven adjusting；Being fixed on by DLP on electronic six axial adjustment platforms, according to projected picture relative position on screen, user controls electric machine rotation adjust the six axial adjustment platforms side-play amount space six direction (rotating before and after up and down) by ordering.
Not only current both approaches is required for tester and by view screen projected picture, six axles is adjusted, it is generally required to be lot more time to adjust expected effect, time-consuming but also require great effort.And due to the sight equation opposite sex, the result that different testers recalls also can be different.
Summary of the invention
Present invention solves the technical problem that it is overcome the deficiencies in the prior art, it is provided that the full degree of freedom of a kind of automatic adjustment ray machine and projection screen relative position adjusts the method for projected picture position and size.
For solving above-mentioned technical problem, technical scheme is as follows:
A kind of full degree of freedom adjusts the method for projected picture position and size, comprises the steps:
(1) standardized test chart is projected by DLP；
(2) just projection screen is shot projected picture by CCD；
(3) adjustment amount that the data acquisition convergent-divergent shot by computer disposal is adjusted, projected picture is adjusted by the knob utilizing convergent-divergent adjustment corresponding；
(4) successively to rotate adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment as regulating object, circulation performs following steps and completes the adjustment to projected picture:
(41) just projection screen is shot projected picture by CCD, approximate algorithm is utilized to be analyzed the data photographed processing by computer, obtaining adjustment amount corresponding to regulating object and adjustment direction, computer automatically controls corresponding knob be adjusted according to adjustment amount corresponding to regulating object and adjustment direction.The present invention is sequentially carried out the adjustment of five axles, including convergent-divergent adjustment, rotate adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment, without horizontal tilt adjustment, simplify adjustment operation, both existing six-axial adjustment frame can have been used to realize the adjustment of projected picture, also only can need to designing five axial adjustment frames when redesigning ray machine and adjusting frame, it is simpler that this makes to adjust frame, and can reduce cost.Additionally, the present invention also utilizes approximate algorithm to ask for the adjustment amount of regulating object so that adjust more accurate.
As a kind of preferred version, concretely comprising the following steps of described step (3):
By computer, the data photographed are zoomed in and out analyzing and processing, a coordinate (x is given by each pixel in projected picture image, y), judge the first row pixel and last column pixel of projected picture image, brightness value f (the x of first row pixel and last string pixel, y) whether it is all 0, if then not performing any operation, otherwise image is reduced until the first row pixel of projected picture image and last column pixel by computer controlled automatic for the knob of convergent-divergent adjustment, brightness value f (the x of first row pixel and last string pixel, y) it is all till 0.
As a kind of preferred version, approximate algorithm particularly as follows:
In advance regulating object correspondence knob is arbitrarily rotated two angle step θKnob 1、θKnob 2, and obtain Image Adjusting increment θ corresponding after corresponding knob rotatesImage 1、θImage 2, substitute into equation θKnob=αθImage+ β obtains the value of α, β, wherein θKnobRepresent the angle step that knob rotates, θImageFor Image Adjusting increment；
The corresponding adjustment amount θ got is processed by the projected picture image photographed is analyzed1As θImageSubstitute into equation θKnob=αθImage+ β asks for the θ of correspondenceKnob, according to the θ asked forKnobRegulate corresponding knob；
To on the projected picture image that once shoots be analyzed processing time calculate the new adjustment amount θ got2；
According to the θ that the last time asks forKnobWith the θ obtained in advanceKnob 1、θKnob 2Compare, if | θKnob-θKnob 1|≤|θKnob-θKnob 2|, then (θKnob,θ1)、(θKnob 1,θImage 1) substitute into former linear equation θKnob=αθImage+ β, obtains the value of α, β, otherwise (θKnob,θ1)、(θKnob 2,θImage 2) substitute into former linear equation θKnob=αθImage+ β obtains the value of α, β；
θ2, newly α, β of asking for substitute into equation, obtain θKnob。
Utilize approximate algorithm that the adjustment amount that regulating object is corresponding is modulated.Owing to the control of picture is not linear relationship by six axle knobs, namely the ratio of the increment of rotation of six axle knobs position change amount corresponding with test figure is not a constant, when such as rotating adjustment, knob 30 degree, projection picture is likely to rotate 20 degree, knob rotates 30 degree again, and projection picture is likely to only rotate 16 degree, and namely image is rotated and controls do not have rule by the increment of rotation of knob.Therefore, the adjustment angle that the present invention carrys out Step wise approximation the best by approximate algorithm reaches the knob accurate control to the variable quantity of image so that adjust more accurate, it is ensured that the projection quality of ray machine.
As further preferred version,
When regulating object adjusts for rotating, concretely comprising the following steps of described step (41):
(4101) just projection screen is shot projected picture by CCD；
(4102) by computer, the projected picture image photographed being rotated analyzing and processing, the brightness value of projected picture image is judged from left to right by column, each column judges from top to bottom, writes down each column initial zero brightness value coordinate (xn, yn) and terminate zero brightness value coordinate (xn', yn'), remember that the vertical dimension between them is Δ yn=|yn-yn'|；
If meeting Δ y1=Δy2=...=ΔynIf, then coordinate y1=y2=...=yn, then need not adjust, if y1≠y2≠...≠yn, then asked for by approximate algorithm and rotate the knob rotation angle θ adjustedKnob, computer controlled automatic rotates θ for the knob rotating adjustmentKnob；Wherein in approximate algorithmθ1For representing the angle of projected picture image deviation horizontal direction, work as θ1> 0 time, expression is rotated clockwise, otherwise counterclockwise rotates；
(4103) adjust Posterior circle and perform the y in the extremely up-to-date projected picture image of step (4101)-(4102)1=y2=...=ynTill.
As further preferred version, when carrying out vertical slope adjustment after the rotation adjustment completing projected picture；
When regulating object is vertical slope adjustment, concretely comprising the following steps of described step (41):
(4111) just projection screen is shot projected picture by CCD；
(4112) by computer, the projected picture image photographed being carried out vertical slope analyzing and processing, image brightness values is judged from left to right by column, each column judges from top to bottom, writes down each column initial zero brightness value coordinate (xn, yn) and terminate zero brightness value coordinate (xn', yn'), remember that the vertical dimension between them is Δ yn=|yn-yn' |, if meeting Δ y1=Δy2=...=Δyn, and coordinate y1=y2=...=yn, y1'=y2'=...=yn', then the knob for vertical slope adjustment need not be adjusted, otherwise utilize approximate algorithm to calculate and obtain the θ adjusted for vertical slopeKnobAngle, wherein in approximate algorithmIf θ1> 0, then the knob adjusted by computer controlled automatic vertical slope counterclockwise rotates θKnobImage bottom is made to shrink, otherwise, then the knob θ that vertical slope adjusts is diverted in dextrorotationKnob, make image bottom expand；
(4113) continue executing with step (4111)-(4112) after adjusting to carry out vertical slope and adjust the Δ y to a up-to-date projected picture image1=Δy2=...=Δyn, and coordinate y1=y2=...=yn, y1'=y2'=...=yn' till.
As further preferred version,
Horizontal displacement adjustment is carried out after completing vertical slope adjustment；
When regulating object is horizontal displacement adjustment, concretely comprising the following steps of described step (41):
(4121) just projection screen is shot projected picture by CCD；
(4122) by computer, the projected picture image photographed is carried out Analysis of Lateral Displacement process, projected picture image progressive is judged, when certain row has continuous brightness value f, (x, when y)=1, writes down first of this journey and coordinate figure (x that last brightness value is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make Δ x1=|xn-x1|, Δ xn=|x1'-xn' |, if Δ x1=Δxn, then the knob for horizontal displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for horizontal directionKnob, wherein in approximate algorithmIf Δ x1<Δxn, then computer controls the knob that horizontal displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(4123) continue executing with step (4121)-(4122) after adjusting to carry out horizontal displacement and adjust the Δ x to a up-to-date projected picture image1=ΔxnTill.
As further preferred version, described method complete to rotate adjust, vertical slope adjustment and horizontal displacement perform convergent-divergent adjustment by projected picture image control inside projection screen always according to step (3) after adjusting.
As further preferred version,
Vertical displacement adjustment is carried out after completing horizontal displacement adjustment；
When regulating object is vertical displacement adjustment, concretely comprising the following steps of described step (41):
(4131) just projection screen is shot projected picture by CCD；
(4132) by computer, the projected picture image photographed is carried out vertical displacement analysis process, projected picture image is judged by column, when certain shows continuous brightness value f, (x, when y)=1, writes down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；Make Δ y1=|yn-y1|, Δ yn=|y1'-yn' |, if Δ y1=Δyn, then the knob for vertical displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for vertical directionKnob, wherein in approximate algorithmIf Δ y1<Δyn, then computer controls the knob that vertical displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(4133) continue executing with step (4131)-(4132) after adjusting to carry out vertical displacement and adjust the Δ y to a up-to-date projected picture image1=ΔynTill.
As further preferred version,
Image is also amplified after completing vertical displacement adjustment adjusting by described method, concretely comprises the following steps:
(101) just projection screen is shot projected picture by CCD；
(102) by computer, the projected picture image photographed is amplified analyzing and processing, projected picture image is judged by column；
When certain shows continuous brightness value f, (x, when y)=1, writes down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make r=| y1'-y1|,R=|yn'-yn|, if r=R, then it is made without amplifying adjusting；Otherwise utilize approximate algorithm to obtain and amplify the adjustment amount θ adjustedKnob, wherein, the θ in approximate algorithm1=R-r, computer controlled automatic amplifies the knob adjusted so that it is counterclockwise rotate θKnob；
(103) continue executing with step (101)-(102) after adjusting to be amplified adjusting to the r=R in a up-to-date projected picture image.
As a kind of preferred version, described standardized test chart is white rectangle test figure.Described white rectangle test figure is provided with a histogram in blank image, when the scanning element judged on captured projected picture image, it is possible to by judging that the scanning element of continuous a few row is determined, it is to avoid the interference of noise.
Compared with prior art, technical solution of the present invention provides the benefit that:
(1) present invention can pass through computer controlled automatic six axial adjustment knob, accurately adjusts the relative position of ray machine and projection screen so that projection picture can correctly be displayed in full screen on the projection screen.
(2) the adjustment process of the present invention is without manual operation, time saving and energy saving, and avoids artificial subjectivity judgement so that the result after adjustment is more accurately reliable.And the present invention utilizes CCD that projecting image data is acquired, and utilizes computer that data are processed, processing the structure obtained can show very easily on computers, it is simple to operator watches, very convenient.
(3) five knobs in six axle knobs only need to be controlled completing whole adjustment process by the present invention, simplifies adjustment process, and six axle knobs can be improved to five axle knobs, saves cost, makes simpler.
(4) present invention utilizes approximate algorithm that the adjustment amount of each axle knob is modified so that adjust result more accurately reliable.
(5) present invention has only on DLP to project a white rectangle test figure in whole adjustment process, utilize this white rectangle test figure when the scanning element judged on captured projected picture image, can by judging that the scanning element of continuous a few row is determined, it is to avoid the interference of noise.
(6) present invention first passes through convergent-divergent adjustment by image scaling at inside screen in adjustment process, then again it is rotated adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment, after each EOS that vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjust, all judge that whether image is at inside screen, if not being, then adjust image at inside screen, it is ensured that the accurate and precision of adjustment.
Accompanying drawing explanation
Fig. 1 is the effect schematic diagram of each axle in six axial adjustment platforms；
Fig. 2 is the flow chart of the specific embodiment of the invention；
Fig. 3 is the Plays test figure of the present invention schematic diagram projected on the projection screen；
Fig. 4 is the coordinate schematic diagram set up in the present invention；
Fig. 5 is the coordinate schematic diagram carrying out vertical slope adjustment in the specific embodiment of the invention；
Fig. 6 is the coordinate schematic diagram carrying out horizontal displacement adjustment in the specific embodiment of the invention；
Fig. 7 is the coordinate schematic diagram carrying out vertical displacement adjustment in the specific embodiment of the invention；
Fig. 8 carries out image to amplify the coordinate schematic diagram adjusted in the specific embodiment of the invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical scheme is described further.
As in figure 2 it is shown, be the flow chart of the method specific embodiment that a kind of full degree of freedom adjusts projected picture position and size in the present invention.As it is shown in figure 1, it concretely comprises the following steps:
(S1) standardized test chart is projected by DLP；Standardized test chart is the white picture including a rectangle, is called white rectangle test figure, is traditionally arranged to be white, it is also possible to is set to other colors, as long as meeting the condition inconsistent with projection screen black background.As it is shown on figure 3, the schematic diagram after being projected by DLP for standardized test chart, due to the impact of distortion, the figure that actual projection screen shows not is a histogram.In whole adjustment process, this standardized test chart is shown on the projection screen to facilitate acquired projections picture data in whole adjustment process by DLP always.
(S2) just projection screen is shot projected picture by CCD；
(S3) adjustment amount that the data acquisition convergent-divergent shot by computer disposal is adjusted, projected picture is adjusted by the knob utilizing convergent-divergent adjustment corresponding；
(S4) successively to rotate adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment as regulating object, circulation performs following steps and completes the adjustment to projected picture:
(41) just projection screen is shot projected picture by CCD, approximate algorithm is utilized to be analyzed the data photographed processing by computer, obtaining adjustment amount corresponding to regulating object and adjustment direction, computer automatically controls corresponding knob be adjusted according to adjustment amount corresponding to regulating object and adjustment direction.
In the present invention, only need to successively five knobs in six axle knobs be controlled, namely for convergent-divergent adjustment, five knobs that adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjust are rotated, without horizontal tilt adjustment, as it is shown in figure 1, be the effect schematic diagram of each axle in six axle knobs.
In implementation process, owing to the control of projected picture is not linear relationship by six axle knobs, namely the ratio of the position change amount that the increment of rotation of six axle knobs is corresponding with test figure is not a constant, in order to more accurately each knob is adjusted, to realize the accurate adjustment of light machine position, present invention employs the approximate algorithm adjustment amount to knob and carry out Step wise approximation so that the adjustment amount of final each knob is more accurate, adjusts result relatively reliable.Specifically, the concretely comprising the following steps of this approximate algorithm:
In advance regulating object correspondence knob is arbitrarily rotated two angle step θKnob 1、θKnob 2, and obtain Image Adjusting increment θ corresponding after corresponding knob rotatesImage 1、θImage 2, substitute into equation θKnob=αθImage+ β obtains the value of α, β, wherein θKnobRepresent the angle step that knob rotates, θImageFor Image Adjusting increment；
The corresponding adjustment amount θ got is processed by the projected picture image photographed is analyzed1As θImageSubstitute into equation θKnob=αθImage+ β asks for the θ of correspondenceKnob, according to the θ asked forKnobRegulate corresponding knob；
To on the projected picture image that once shoots be analyzed processing time calculate the new adjustment amount θ got2；
According to the θ that the last time asks forKnobWith the θ obtained in advanceKnob 1、θKnob 2Compare, if | θKnob-θKnob 1|≤|θKnob-θKnob 2|, then (θKnob,θ1)、(θKnob 1,θImage 1) substitute into former linear equation θKnob=αθImage+ β, obtains the value of α, β, otherwise (θKnob,θ1)、(θKnob 2,θImage 2) substitute into former linear equation θKnob=αθImage+ β obtains the value of α, β；
θ2, newly α, β of asking for substitute into equation, obtain θKnob.This θKnobIt it is the adjustment angle of regulating object correspondence knob.
In a detailed description of the invention, step (S3) zooms in and out the purpose of adjustment and is in that to make the entirety of image to be shown in inside projection screen, and it concretely comprises the following steps:
By computer, the data photographed are zoomed in and out analyzing and processing, each pixel in projected picture image is given coordinate (x, y), as shown in Figure 4；Judge the first row pixel of projected picture image and the brightness value f (x of last column pixel, first row pixel and last string pixel, y) whether it is all 0, if then not performing any operation, now show the projection picture inside at projection screen, it is not necessary to zoom in and out adjustment；Otherwise show that projection picture is not exclusively inside projection screen, need to be contracted to inside projection screen by projection picture, now computer controlled automatic for the knob of convergent-divergent adjustment, image is reduced until the brightness value f of the first row pixel and last column pixel of projected picture image, first row pixel and last string pixel (x is y) till 0.
In a detailed description of the invention, after completing convergent-divergent adjustment, step (S4) first rotates adjustment.When regulating object adjusts for rotating, step (S41) concretely comprises the following steps:
(S4101) just projection screen is shot projected picture by CCD；
(S4102) by computer, the projected picture image photographed being rotated analyzing and processing, the brightness value of projected picture image is judged from left to right by column, each column judges from top to bottom, writes down each column initial zero brightness value coordinate (xn, yn) and terminate zero brightness value coordinate (xn', yn'), remember that the vertical dimension between them is Δ yn=|yn-yn'|；Initial zero brightness value coordinate refers in each column pixel the coordinate figure that first brightness value is not equal to the pixel of 0, terminates zero brightness value coordinate and refers to last brightness value in each column pixel and be not equal to the coordinate figure of the pixel of 0；
If meeting Δ y1=Δy2=...=ΔynIf, then coordinate y1=y2=...=yn, then need not adjust, if y1≠y2≠...≠yn, then asked for by approximate algorithm and rotate the knob rotation angle θ adjustedKnob, computer controlled automatic rotates θ for the knob rotating adjustmentKnob；Wherein in approximate algorithmθ1For representing the angle of projected picture image deviation horizontal direction, work as θ1> 0 time, expression is rotated clockwise, otherwise counterclockwise rotates；
(S4103) adjust Posterior circle and perform the y in step (S4101)-(S4102) extremely up-to-date projected picture image1=y2=...=ynTill.
Complete to rotate adjust after perform convergent-divergent adjustment by projected picture image control inside projection screen always according to above-mentioned steps (S3).
In a detailed description of the invention, when carrying out vertical slope adjustment after the rotation adjustment completing projected picture, it is therefore intended that make image show on the projection screen undistortedly；When regulating object is vertical slope adjustment, described step (S41) concretely comprises the following steps:
(S4111) just projection screen is shot projected picture by CCD；
(S4112) by computer, the projected picture image photographed being carried out vertical slope analyzing and processing, as it is shown in figure 5, image brightness values is judged from left to right by column, each column judges from top to bottom, writes down each column initial zero brightness value coordinate (xn, yn) and terminate zero brightness value coordinate (xn', yn'), remember that the vertical dimension between them is Δ yn=|yn-yn' |, if meeting Δ y1=Δy2=...=Δyn, and coordinate y1=y2=...=yn, y1'=y2'=...=yn', then the knob for vertical slope adjustment need not be adjusted, otherwise utilize approximate algorithm to calculate and obtain the θ adjusted for vertical slopeKnobAngle, wherein in approximate algorithmIf θ1> 0, then the knob adjusted by computer controlled automatic vertical slope counterclockwise rotates θKnobImage bottom is made to shrink, otherwise, then the knob θ that vertical slope adjusts is diverted in dextrorotationKnob, make image bottom expand；
(S4113) continue executing with step (S4111)-(S4112) after adjusting to carry out vertical slope and adjust the Δ y to a up-to-date projected picture image1=Δy2=...=Δyn, and coordinate y1=y2=...=yn, y1'=y2'=...=yn' till.
Convergent-divergent adjustment is performed by projected picture image control inside projection screen always according to above-mentioned steps (S3) completing after vertical slope adjusts.
In a detailed description of the invention, after completing vertical slope adjustment, carry out horizontal displacement adjustment according to above-mentioned steps (S41), it is therefore an objective to making image be positioned at projection screen central authorities in the horizontal direction, it concretely comprises the following steps:
(S4121) just projection screen is shot projected picture by CCD；
(S4122) by computer, the projected picture image photographed is carried out Analysis of Lateral Displacement process, as shown in Figure 6, projected picture image progressive is judged, when certain row has continuous brightness value f (x, when y)=1, write down first of this journey and coordinate figure (x that last brightness value is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make Δ x1=|xn-x1|, Δ xn=|x1'-xn' |, if Δ x1=Δxn, then the knob for horizontal displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for horizontal directionKnob, wherein in approximate algorithmIf Δ x1<Δxn, then computer controls the knob that horizontal displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(S4123) continue executing with step (S4121)-(S4122) after adjusting to carry out horizontal displacement and adjust the Δ x to a up-to-date projected picture image1=ΔxnTill.
Convergent-divergent adjustment is performed by projected picture image control inside projection screen always according to above-mentioned steps (S3) completing after horizontal displacement adjusts.
In a detailed description of the invention, after completing horizontal displacement adjustment, carry out vertical displacement adjustment according to above-mentioned steps (S41), make image be positioned at projection screen central authorities in the vertical direction, concretely comprise the following steps:
(S4131) just projection screen is shot projected picture by CCD；
(S4132) by computer, the projected picture image photographed is carried out vertical displacement analysis process, as shown in Figure 7, projected picture image is judged by column, when certain shows continuous brightness value f (x, when y)=1, write down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；Make Δ y1=|yn-y1|, Δ yn=|y1'-yn' |, if Δ y1=Δyn, then the knob for vertical displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for vertical directionKnob, wherein in approximate algorithmIf Δ y1<Δyn, then computer controls the knob that vertical displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(S4133) continue executing with step (S4131)-(S4132) after adjusting to carry out vertical displacement and adjust the Δ y to a up-to-date projected picture image1=ΔynTill.
Through adjustment above, image has been positioned at the centre of projection screen.Therefore, as long as image is amplified so that it is be in full screen on screen.Therefore, also it is amplified image after completing vertical displacement adjustment adjusting, concretely comprises the following steps:
(S101) just projection screen is shot projected picture by CCD；
(S102) by computer, the projected picture image photographed is amplified analyzing and processing, projected picture image is judged by column, as shown in Figure 8；
When certain shows continuous brightness value f, (x, when y)=1, writes down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make r=| y1'-y1|, R=| yn'-yn|, if r=R, then it is made without amplifying adjusting；Otherwise utilize approximate algorithm to obtain and amplify the adjustment amount θ adjustedKnob, wherein, the θ in approximate algorithm1=R-r, computer controlled automatic amplifies the knob adjusted so that it is counterclockwise rotate θKnob；
(S104) continue executing with step (S101)-(S102) after adjusting to be amplified adjusting to the r=R in a up-to-date projected picture image, make image be full of whole projection screen.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art, under the premise without departing from the principles of the invention, and technical scheme can be done the improvement of some applicable practical situations.Therefore, protection scope of the present invention is not limited to this, and those of skill in the art are any to be included within scope based on non-material change in technical solution of the present invention.
Claims (6)
1. the method that a full degree of freedom adjusts projected picture position and size, it is characterised in that comprise the steps:
(1) standardized test chart is projected by DLP；
(2) just projection screen is shot projected picture by CCD；
(3) adjustment amount that the data acquisition convergent-divergent shot by computer disposal is adjusted, projected picture is adjusted by the knob utilizing convergent-divergent adjustment corresponding, particularly as follows: the data photographed are zoomed in and out analyzing and processing by computer, a coordinate (x is given by each pixel in projected picture image, y), judge the first row pixel and last column pixel of projected picture image, brightness value f (the x of first row pixel and last string pixel, y) whether it is all 0, if then not performing any operation, otherwise image is reduced until the first row pixel of projected picture image and last column pixel by computer controlled automatic for the knob of convergent-divergent adjustment, brightness value f (the x of first row pixel and last string pixel, y) it is all till 0；
(4) successively to rotate adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment as regulating object, circulation performs following steps and completes the adjustment to projected picture:
(41) just projection screen is shot projected picture by CCD, approximate algorithm is utilized to be analyzed the data photographed processing by computer, obtaining adjustment amount corresponding to regulating object and adjustment direction, computer automatically controls corresponding knob be adjusted according to adjustment amount corresponding to regulating object and adjustment direction；
Wherein, complete to rotate adjust after also perform convergent-divergent adjustment by projected picture image control inside projection screen；Convergent-divergent adjustment is also performed by projected picture image control inside projection screen after completing vertical slope adjustment；Convergent-divergent adjustment is also performed by projected picture image control inside projection screen after completing horizontal displacement adjustment；Approximate algorithm particularly as follows:
In advance regulating object correspondence knob is arbitrarily rotated two angle step θKnob 1、θKnob 2, and obtain Image Adjusting increment θ corresponding after corresponding knob rotatesImage 1、θImage 2, substitute into equation θKnob=α θImage+ β obtains the value of α, β, wherein θKnobRepresent the angle step that knob rotates, θImageFor Image Adjusting increment；
The corresponding adjustment amount θ got is processed by the projected picture image photographed is analyzed1As θImageSubstitute into equation θKnob=α θImage+ β asks for the θ of correspondenceKnob, according to the θ asked forKnobRegulate corresponding knob；
To on the projected picture image that once shoots be analyzed processing time calculate the new adjustment amount θ got2；
According to the θ that the last time asks forKnobWith the θ obtained in advanceKnob 1、θKnob 2Compare, if | θKnob-θKnob 1|≤|θKnob-θKnob 2|, then (θKnob, θ 1)、(θKnob 1, θImage 1) substitute into former linear equation θKnob=α θImage+ β, obtains the value of α, β, otherwise (θKnob, θ 1)、(θKnob 2, θImage 2) substitute into former linear equation θKnob=α θImage+ β obtains the value of α, β；
θ2, newly α, β of asking for substitute into equation, obtain θKnob。
2. the method that full degree of freedom according to claim 1 adjusts projected picture position and size, it is characterised in that when regulating object adjusts for rotating, concretely comprising the following steps of described step (41):
(4101) just projection screen is shot projected picture by CCD；
(4102) by computer, the projected picture image photographed being rotated analyzing and processing, the brightness value of projected picture image is judged from left to right by column, each column judges from top to bottom, writes down each column initial zero brightness value coordinate (xn, yn) and terminate zero brightness value coordinate (xn', yn'), remember that the vertical dimension between them is Δ yn=| yn-yn'|；
If meeting Δ y1=Δ y2=...=Δ ynIf, then coordinate y1=y2=...=yn, then need not adjust, if y1≠y2≠...≠yn, then asked for by approximate algorithm and rotate the knob rotation angle θ adjustedKnob, computer controlled automatic rotates θ for the knob rotating adjustmentKnob；Wherein in approximate algorithmθ1For representing the angle of projected picture image deviation horizontal direction, work as θ1> 0 time, expression is rotated clockwise, otherwise counterclockwise rotates；
(4103) adjust Posterior circle and perform the y in the extremely up-to-date projected picture image of step (4101)-(4102)1=y2=...=ynTill.
3. the method that full degree of freedom according to claim 2 adjusts projected picture position and size, it is characterised in that carry out horizontal displacement adjustment after completing vertical slope adjustment；
When regulating object is horizontal displacement adjustment, concretely comprising the following steps of described step (41):
(4121) just projection screen is shot projected picture by CCD；
(4122) by computer, the projected picture image photographed is carried out Analysis of Lateral Displacement process, projected picture image progressive is judged, when certain row has continuous brightness value f (x, when y)=1, write down first of this journey and coordinate figure (x that last brightness value is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make Δ x1=| xn-x1|, Δ xn=| x1'-xn' |, if Δ x1=Δ xn, then the knob for horizontal displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for horizontal directionKnob, wherein in approximate algorithmIf Δ x1<Δxn, then computer controls the knob that horizontal displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(4123) continue executing with step (4121)-(4122) after adjusting to carry out horizontal displacement and adjust the Δ x to a up-to-date projected picture image1=Δ xnTill.
4. the method that full degree of freedom according to claim 1 adjusts projected picture position and size, it is characterised in that carry out vertical displacement adjustment after completing horizontal displacement adjustment；
When regulating object is vertical displacement adjustment, concretely comprising the following steps of described step (41):
(4131) just projection screen is shot projected picture by CCD；
(4132) by computer, the projected picture image photographed is carried out vertical displacement analysis process, projected picture image is judged by column, when certain shows continuous brightness value f (x, when y)=1, write down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；Make Δ y1=| yn-y1|, Δ yn=| y1'-yn' |, if Δ y1=Δ yn, then the knob for vertical displacement adjustment need not be adjusted；Otherwise, approximate algorithm is utilized to calculate the side-play amount θ adjusted for vertical directionKnob, wherein in approximate algorithmIf Δ y1<Δyn, then computer controls the knob that vertical displacement direction adjusts so that it is counterclockwise rotate θKnob, otherwise so that it is be rotated clockwise θKnob；
(4133) continue executing with step (4131)-(4132) after adjusting to carry out vertical displacement and adjust the Δ y to a up-to-date projected picture image1=Δ ynTill.
5. the method that full degree of freedom according to claim 4 adjusts projected picture position and size, it is characterised in that image is also amplified after completing vertical displacement adjustment adjusting by described method, concretely comprises the following steps:
(101) just projection screen is shot projected picture by CCD；
(102) by computer, the projected picture image photographed is amplified analyzing and processing, projected picture image is judged by column；
When certain shows continuous brightness value f, (x, when y)=1, writes down first of these row and coordinate figure (x that last brightness is 0 and 1 respectively1, y1)、(x1', y1')、(xn, yn)、(xn', yn')；
Make r=| y1'-y1|, R=| yn'-yn|, if r=R, then it is made without amplifying adjusting；Otherwise utilize approximate algorithm to obtain and amplify the adjustment amount θ adjustedKnob, wherein, the θ in approximate algorithm1=R-r, computer controlled automatic amplifies the knob adjusted so that it is counterclockwise rotate θKnob；
(103) continue executing with step (101)-(102) after adjusting to be amplified adjusting to the r=R in a up-to-date projected picture image.
6. the method that the full degree of freedom according to any one of claim 1 to 5 adjusts projected picture position and size, it is characterised in that described standardized test chart is white rectangle test figure.
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| CN104516699A (en) * | 2013-09-27 | 2015-04-15 | 联想(北京)有限公司 | Image display method and electronic device |
| CN103605256A (en) * | 2013-11-28 | 2014-02-26 | 上海纬而视科技股份有限公司 | Electric device of DLP six-axis adjusting platform |
| CN104731311A (en) * | 2013-12-24 | 2015-06-24 | 鸿富锦精密工业（深圳）有限公司 | Display device and method |
| CN104104929A (en) * | 2014-02-11 | 2014-10-15 | 中兴通讯股份有限公司 | Remote projection method, device and system |
| CN104850371B (en) * | 2014-02-17 | 2017-12-26 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN104954768A (en) * | 2014-03-28 | 2015-09-30 | 联想(北京)有限公司 | Projection image correction method and electronic equipment |
| CN104243975A (en) * | 2014-09-19 | 2014-12-24 | 西安中科晶像光电科技有限公司 | Automatic calibration system and method of 3D projector |
| CN106775525A (en) * | 2016-12-02 | 2017-05-31 | 北京小米移动软件有限公司 | Control the method and device of projecting apparatus |
| CN107197222B (en) * | 2017-05-25 | 2020-04-28 | 青岛海信电器股份有限公司 | Method and device for generating correction information of projection equipment |
| CN107360406B (en) * | 2017-07-11 | 2020-08-25 | 上海九孚实业有限公司 | Signpost positioning system |
| CN107515507A (en) * | 2017-08-25 | 2017-12-26 | 安徽信息工程学院 | Projecting apparatus automatic correction device |
| CN108012130A (en) * | 2017-11-26 | 2018-05-08 | 安徽省司尔特肥业股份有限公司 | A kind of projection angle adjusting type agriculture exhibition can use exhibition booth |
| CN108107652A (en) * | 2017-11-26 | 2018-06-01 | 安徽省司尔特肥业股份有限公司 | A kind of image projection antidote for agriculture exhibition meeting |
| CN109005394B (en) * | 2018-09-19 | 2019-11-29 | 青岛海信激光显示股份有限公司 | A kind of bearing calibration of projected image and projector |
| CN109547756B (en) * | 2018-10-16 | 2021-08-31 | 成都理想境界科技有限公司 | Splicing type scanning imaging equipment and adjusting method |
| CN113949852A (en) * | 2020-07-17 | 2022-01-18 | 深圳光峰科技股份有限公司 | Projection method, projection apparatus, and storage medium |
| CN113539162B (en) * | 2021-07-02 | 2024-05-10 | 深圳精智达技术股份有限公司 | Image capturing method and device of display panel |
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| JP3680807B2 (en) * | 2002-03-20 | 2005-08-10 | セイコーエプソン株式会社 | Projector to correct keystone distortion |
| JP4508553B2 (en) * | 2003-06-02 | 2010-07-21 | カシオ計算機株式会社 | Captured image projection device and captured image correction method |
| US20060203207A1 (en) * | 2005-03-09 | 2006-09-14 | Ikeda Roger M | Multi-dimensional keystone correction projection system and method |
| CN102749794B (en) * | 2012-06-29 | 2014-10-29 | 广东威创视讯科技股份有限公司 | Full-automatic DLP (Digital Light Processing) light machine position adjusting method and device |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: VTRON GROUP Co.,Ltd. Address before: 510663 No. 6, color road, hi tech Industrial Development Zone, Guangdong, Guangzhou, China Patentee before: VTRON TECHNOLOGIES Ltd. |
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