CN103220482A - Method for adjusting position and size of projection picture with full degree of freedom - Google Patents
Method for adjusting position and size of projection picture with full degree of freedom Download PDFInfo
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- CN103220482A CN103220482A CN2013100791855A CN201310079185A CN103220482A CN 103220482 A CN103220482 A CN 103220482A CN 2013100791855 A CN2013100791855 A CN 2013100791855A CN 201310079185 A CN201310079185 A CN 201310079185A CN 103220482 A CN103220482 A CN 103220482A
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Abstract
The invention relates to a method for adjusting the position and the size of a projection picture with the full degree of freedom. The method comprises the steps of projecting a standard testing image through digital light process (DLP); aiming at a projection screen and shooting the projection picture through CCD; acquiring the adjustment amount of a zoom adjustment to conduct zoom adjustment by processing of shot data by a computer; and sequentially using rotating adjustment, vertical inclination adjustment, horizontal displacement adjustment and vertical displacement adjustment as an adjustment object, loop executing of the following steps and completing the adjustment to the projection picture. The CCD is directed at the projection screen to shoot the projection picture, analyzing and processing are conducted on the shot data by using an approximation algorithm through the computer to obtain the adjustment amount and the adjustment direction corresponding to the adjustment object, and the computer automatically controls a corresponding knob to conduct adjustment. By means of the method for adjusting the position and the size of the projection picture with the full degree of freedom, the computer automatically controls the five shafts of six shafts to adjust the knob, so that the relative position of a light machine and the projection screen can be adjusted accurately, the projection image can be fully displayed on the screen inerrably, manual operation is needless, and time and labor can be saved.
Description
Technical field
The present invention relates to the optical projection system field, be specifically related to the method that a kind of full degree of freedom is adjusted projected picture position and size.
Background technology
Digital light treatment technology (Digital Lighting Processing-DLP) is based on the device of MEMS (micro electro mechanical system), it is a kind of device that adopts semiconductor fabrication, is made up of high-speed figure formula light reflex switch array, adopt the binary pulse width modulated technology accurately to control the tonal gradation of light, add the acting in conjunction of image processing, memory, light source and optical system, to large-screen, can produce high brightness, high-contrast, seamless coloured image to image projection.But in order to guarantee that projected image can distortionless full frame correctly being presented on the screen, the relative position of adjustment ray machine and large-screen accurately.
Method of adjustment to ray machine mainly is to realize by manual six axial adjustment or electronic six axial adjustment at present.1, manual six axial adjustment are fixed on DLP on the precision optical machinery six axial adjustment platforms, and according to the relative position of projected picture on screen, manual adjustment six axial adjustment platforms are in the side-play amount of space six direction (rotation up and down); 2, electronic six axial adjustment, electronic six have A, B, C, D, six axles of E, F, the upright position of A axial adjustment image, B axial adjustment image level position, C axle convergent-divergent is adjusted, D axle image rotating, E axle vertical slope is adjusted, F axial adjustment picture vertical gradient, each effect as shown in Figure 1, motor of each correspondence drives adjustment; DLP is fixed on the electronic six axial adjustment platforms, and according to the relative position of projected picture on screen, the user rotates by order control motor and adjusts the side-play amount of six axial adjustment platforms in space six direction (rotation up and down).
These two kinds of methods all need the tester to come six are adjusted by the view screen projected picture at present, generally need just can adjust to expected effect for a long time, promptly time-consuming effort again.And because the sight equation opposite sex, the result that different testers accesses also can be different.
Summary of the invention
The technical problem that the present invention solves is to overcome the deficiencies in the prior art, and the full degree of freedom adjustment projected picture position of a kind of automatic adjustment ray machine and projection screen relative position and the method for size are provided.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
A kind of full degree of freedom is adjusted the method for projected picture position and size, comprises the steps:
(1) by DLP projection standardized test chart;
(2) take projected picture by CCD over against projection screen;
(3) data of taking by Computer Processing are obtained the adjustment amount that convergent-divergent is adjusted, and utilize the knob of convergent-divergent adjustment correspondence that projected picture is adjusted;
(4) adjust as adjusting object with rotation adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement successively, circulation execution following steps are finished the adjustment to projected picture:
(41) take projected picture by CCD over against projection screen, utilize approximate algorithm that the data that photograph are carried out analyzing and processing by computer, obtain the adjustment amount of adjustment object correspondence and adjust direction, computer is controlled corresponding knob according to the adjustment amount of adjusting the object correspondence automatically with the adjustment direction and is adjusted.The present invention carries out the adjustment of five axles successively, comprise convergent-divergent adjustment, rotation adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment, and need not the horizontal tilt adjustment, simplified and adjusted operation, both can use existing six-axial adjustment frame to realize the adjustment of projected picture, also can only need design five axial adjustment frames when redesign ray machine adjustment rack, this makes adjustment rack simpler, and can reduce cost.In addition, the present invention also utilizes approximate algorithm to ask for the adjustment amount of adjusting object, makes that adjustment is more accurate.
As a kind of preferred version, the concrete steps of described step (3) are:
By computer the data that photograph are carried out the convergent-divergent analyzing and processing, give a coordinate (x with each pixel in the projected picture image, y), judge first row pixel and last column pixel of projected picture image, brightness value f (the x of the first row pixel and last row pixel, y) whether all be 0, if then do not carry out any operation, otherwise the knob that computer controlled automatic is used for the convergent-divergent adjustment dwindles first row pixel and last column pixel until the projected picture image to image, (x is till 0 y) to the brightness value f of the first row pixel and last row pixel.
As a kind of preferred version, approximate algorithm is specially:
To adjust the corresponding knob of object two angle step θ of rotation arbitrarily in advance
Knob 1, θ
Knob 2, and obtain the pairing image in corresponding knob rotation back and adjust increment θ
Image 1, θ
Image 2, substitution equation θ
Knob=α θ
Image+ β obtains the value of α, β, wherein θ
KnobThe angle step of expression knob rotation, θ
ImageFor image is adjusted increment;
To carry out the corresponding adjustment amount θ that analyzing and processing gets access to the projected picture image that photographs
1As θ
ImageSubstitution equation θ
Knob=α θ
Image+ β asks for corresponding θ
Knob, according to the θ that asks for
KnobRegulate corresponding knob;
When being carried out analyzing and processing, calculates the projected picture image of next time taking the new adjustment amount θ that gets access to
2
The θ that asks for according to the last time
KnobWith the θ that obtains in advance
Knob 1, θ
Knob 2Compare, if | θ
Knob-θ
Knob 1|≤| θ
Knob-θ
Knob 2|, then (θ
Knob, θ
1), (θ
Knob 1, θ
Image 1) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β, otherwise (θ
Knob, θ
1), (θ
Knob 2, θ
Image 2) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β;
θ
2, α, the β substitution equation newly asked for, obtain θ
Knob
Utilize approximate algorithm that the adjustment amount of adjusting the object correspondence is modulated.Because six knobs are not linear relationship to the control of picture, promptly the ratio of the corresponding position change amount of the increment of rotation of six knobs and resolution chart is not a constant, when adjusting such as rotation, knob 30 degree, projected image may rotate 20 degree, knob rotates 30 degree again, and projected image may only rotate 16 degree, and promptly the increment of rotation of knob is rotated to control to image and there is not rule.Therefore, the present invention progressively approaches best adjustment angle by approximate algorithm and reaches the accurate control of knob to the variable quantity of image, makes that adjustment is more accurate, guarantees the projection quality of ray machine.
As further preferred version,
When adjusting object for the rotation adjustment, the concrete steps of described step (41) are:
(4101) take projected picture by CCD over against projection screen;
(4102) by computer the projected picture image that photographs is rotated analyzing and processing, the brightness value of projected picture image is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |;
If satisfy Δ y
1=Δ y
2=...=Δ y
n, then if coordinate y
1=y
2=...=y
n, then do not need to adjust, if y
1≠ y
2≠ ... ≠ y
n, then ask for the knob anglec of rotation θ that rotation is adjusted by approximate algorithm
Knob, computer controlled automatic is used to rotate the knob rotation θ of adjustment
KnobWherein in the approximate algorithm
θ
1For representing that the projected picture image departs from the angle of horizontal direction, works as θ
10 o'clock, the rotation of expression clockwise direction, otherwise rotation counterclockwise;
(4103) adjust the y of circulation execution in step (4101)-(4102), back to the up-to-date projected picture image
1=y
2=...=y
nTill.
As further preferred version again, after the rotation adjustment of finishing projected picture, carry out the vertical slope adjustment;
When the adjustment object was the vertical slope adjustment, the concrete steps of described step (41) were:
(4111) take projected picture by CCD over against projection screen;
(4112) by computer the projected picture image that photographs is carried out the vertical slope analyzing and processing, the image brightness value is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |, if satisfy Δ y
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n', then do not need the knob that is used for the vertical slope adjustment is adjusted, be used for the θ that vertical slope is adjusted otherwise utilize approximate algorithm to calculate and obtain
KnobThe angle is wherein in the approximate algorithm
If θ
10, then the knob by the adjustment of computer controlled automatic vertical slope counterclockwise rotates θ
KnobThe image bottom is shunk, otherwise then the knob θ that vertical slope is adjusted is diverted in dextrorotation
Knob, make the expansion of image bottom;
(4113) adjusting the back continues execution in step (4111)-(4112) and carries out vertical slope and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n' till.
As preferred version further,
After finishing the vertical slope adjustment, carry out the horizontal displacement adjustment;
When adjusting object is the horizontal displacement adjustment, and the concrete steps of described step (41) are:
(4121) take projected picture by CCD over against projection screen;
(4122) by computer the projected picture image that photographs being carried out Analysis of Lateral Displacement handles, the projected picture image is judged line by line, (x, y)=1 o'clock, first and last brightness value of writing down this journey respectively are 0 and 1 coordinate figure (x when certain row has continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make Δ x
1=| x
n-x
1|, Δ x
n=| x
1'-x
n' |, if Δ x
1=Δ x
n, then do not need the knob that is used for the horizontal displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that horizontal direction is adjusted
Knob, wherein in the approximate algorithm
If Δ x
1＜Δ x
n, then the knob of computer control horizontal displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(4123) adjusting the back continues execution in step (4121)-(4122) and carries out horizontal displacement and be adjusted to Δ x in the up-to-date projected picture image
1=Δ x
nTill.
As preferred version further, described method is also carried out the convergent-divergent adjustment according to step (3) the projected picture image is controlled at projection screen inside after finishing rotation adjustment, vertical slope adjustment and horizontal displacement and adjusting.
As preferred version further,
After finishing the horizontal displacement adjustment, carry out the vertical displacement adjustment;
When adjusting object is the vertical displacement adjustment, and the concrete steps of described step (41) are:
(4131) take projected picture by CCD over against projection screen;
(4132) by computer the projected picture image that photographs is carried out the vertical displacement analyzing and processing, the projected picture image is judged by row, (x, y)=1 o'clock, first and last brightness of writing down these row respectively are 0 and 1 coordinate figure (x when certain shows continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n'); Make Δ y
1=| y
n-y
1|, Δ y
n=| y
1'-y
n' |, if Δ y
1=Δ y
n, then do not need the knob that is used for the vertical displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that vertical direction is adjusted
Knob, wherein in the approximate algorithm
If Δ y
1＜Δ y
n, then the knob of computer control vertical displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(4133) adjusting the back continues execution in step (4131)-(4132) and carries out vertical displacement and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
nTill.
As preferred version further,
Described method is also amplified adjustment to image after finishing the vertical displacement adjustment, and concrete steps are:
(101) take projected picture by CCD over against projection screen;
(102) by computer the projected picture image that photographs is amplified analyzing and processing, the projected picture image is judged by row;
(x, y)=1 o'clock, first and last brightness of writing down these row respectively are 0 and 1 coordinate figure (x when certain shows continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make r=|y
1'-y
1|, R=|y
n'-y
n|, if r=R does not then need to amplify adjustment; Amplify the adjustment amount θ that adjusts otherwise utilize approximate algorithm to obtain
Knob, wherein, the θ in the approximate algorithm
1=R-r, computer controlled automatic is amplified the knob of adjusting, and makes it counterclockwise rotate θ
Knob
(103) adjusting continuation execution in step (101)-(102), back amplifies till the r=R that is adjusted in the up-to-date projected picture image.
As a kind of preferred version, described standardized test chart is the white rectangle resolution chart.Described white rectangle resolution chart is provided with a histogram in blank image, during scanning element on judging captured projected picture image, can determine by the scanning element of judging continuous several row, has avoided interference of noise.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
(1) the present invention can pass through computer controlled automatic six axial adjustment knobs, accurately adjusts the relative position of ray machine and projection screen, makes projected image correctly to be in full screen on the projection screen.
(2) adjustment process of the present invention need not manual operation, and is time saving and energy saving, and avoided artificial subjectivity to judge, makes adjusted result more accurately reliable.And the present invention utilizes CCD that projecting image data is gathered, and utilizes computer that data are handled, and handling the structure that obtains can show very easily on computers, is convenient to the operator and watches, very convenient.
(3) the present invention only need control five knobs in six knobs and can finish whole adjustment process, has simplified adjustment process, and six knobs can be improved to five knobs, saves cost, makes simpler.
(4) the present invention utilizes approximate algorithm that the adjustment amount of each knob is revised, and makes to adjust the result more accurately reliably.
(5) the present invention only needs projection one white rectangle resolution chart on the DLP in whole adjustment process, when utilizing the scanning element of this white rectangle resolution chart on judging captured projected picture image, can determine by the scanning element of judging continuous several row, avoid interference of noise.
(6) the present invention in adjustment process earlier by the convergent-divergent adjustment with image zoom in screen inside, and then it is rotated adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement adjustment, behind each EOS that vertical slope adjustment, horizontal displacement adjustment and vertical displacement are adjusted, judge that all whether image is in screen inside, as not being, then adjust image in screen inside, guarantee the accurate and precision of adjusting.
Description of drawings
Fig. 1 is each an effect schematic diagram in the six axial adjustment platforms;
Fig. 2 is the flow chart of the specific embodiment of the invention;
Fig. 3 is the schematic diagram of standardized test chart projection on projection screen among the present invention;
The coordinate schematic diagram of Fig. 4 for setting up among the present invention;
Fig. 5 is for carrying out the coordinate schematic diagram that vertical slope is adjusted in the specific embodiment of the invention;
Fig. 6 is for carrying out the coordinate schematic diagram that horizontal displacement is adjusted in the specific embodiment of the invention;
Fig. 7 is for carrying out the coordinate schematic diagram that vertical displacement is adjusted in the specific embodiment of the invention;
Fig. 8 amplifies the coordinate schematic diagram of adjusting for carrying out image in the specific embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described further.
As shown in Figure 2, adjust the flow chart of the method specific embodiment of projected picture position and size for a kind of full degree of freedom among the present invention.As shown in Figure 1, its concrete steps are:
(S1) by DLP projection standardized test chart; Standardized test chart is the white picture that comprises a rectangle, is called the white rectangle resolution chart, is traditionally arranged to be white, also can be set to other colors, as long as satisfy and the inconsistent condition of projection screen black background.As shown in Figure 3, for standardized test chart by the schematic diagram after the DLP projection because the influence of distortion, the figure that actual projection screen shows not is a histogram.In whole adjustment process, this standardized test chart is presented on the projection screen with acquired projections picture data in the convenient whole adjustment process by DLP always.
(S2) take projected picture by CCD over against projection screen;
(S3) data of taking by Computer Processing are obtained the adjustment amount that convergent-divergent is adjusted, and utilize the knob of convergent-divergent adjustment correspondence that projected picture is adjusted;
(S4) adjust as adjusting object with rotation adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement successively, circulation execution following steps are finished the adjustment to projected picture:
(41) take projected picture by CCD over against projection screen, utilize approximate algorithm that the data that photograph are carried out analyzing and processing by computer, obtain the adjustment amount of adjustment object correspondence and adjust direction, computer is controlled corresponding knob according to the adjustment amount of adjusting the object correspondence automatically with the adjustment direction and is adjusted.
In the present invention, only need successively five knobs in six knobs to be controlled, promptly be used for five knobs that convergent-divergent adjustment, rotation adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement are adjusted, and need not the horizontal tilt adjustment, as shown in Figure 1, be each effect schematic diagram in six knobs.
In implementation process, because six knobs are not linear relationship to the control of projected picture, promptly the ratio of the increment of rotation of the six knobs position change amount corresponding with resolution chart is not a constant, in order more accurately each knob to be adjusted, to realize the accurate adjustment of ray machine position, the present invention has adopted approximate algorithm that the adjustment amount of knob is progressively approached, and makes that the adjustment amount of final each knob is more accurate, and it is more reliable to adjust the result.Particularly, the concrete steps of this approximate algorithm are:
To adjust the corresponding knob of object two angle step θ of rotation arbitrarily in advance
Knob 1, θ
Knob 2, and obtain the pairing image in corresponding knob rotation back and adjust increment θ
Image 1, θ
Image 2, substitution equation θ
Knob=α θ
Image+ β obtains the value of α, β, wherein θ
KnobThe angle step of expression knob rotation, θ
ImageFor image is adjusted increment;
To carry out the corresponding adjustment amount θ that analyzing and processing gets access to the projected picture image that photographs
1As θ
ImageSubstitution equation θ
Knob=α θ
Image+ β asks for corresponding θ
Knob, according to the θ that asks for
KnobRegulate corresponding knob;
When being carried out analyzing and processing, calculates the projected picture image of next time taking the new adjustment amount θ that gets access to
2
The θ that asks for according to the last time
KnobWith the θ that obtains in advance
Knob 1, θ
Knob 2Compare, if | θ
Knob-θ
Knob 1|≤| θ
Knob-θ
Knob 2|, then (θ
Knob, θ
1), (θ
Knob 1, θ
Image 1) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β, otherwise (θ
Knob, θ
1), (θ
Knob 2, θ
Image 2) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β;
θ
2, α, the β substitution equation newly asked for, obtain θ
KnobThis θ
KnobIt is the adjustment angle of adjusting the corresponding knob of object.
In an embodiment, the purpose that step (S3) is carried out the convergent-divergent adjustment is to make the integral body of image all to be presented at projection screen inside, and its concrete steps are:
By computer the data that photograph are carried out the convergent-divergent analyzing and processing, with each pixel in the projected picture image give a 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, the first row pixel and last row pixel, y) whether all be 0, if then do not carry out any operation, show the inside of projected image at projection screen this moment, need not to carry out the convergent-divergent adjustment; Otherwise show that projected image is not exclusively in projection screen inside, projected image need be contracted to projection screen inside, the knob that this moment, computer controlled automatic was used for the convergent-divergent adjustment dwindles brightness value f until the first row pixel and last column pixel, the first row pixel and last row pixel of projected picture image to image, and (x is till 0 y).
In an embodiment, after finishing the convergent-divergent adjustment, step (S4) is rotated adjustment earlier.When adjusting object for the rotation adjustment, the concrete steps of step (S41) are:
(S4101) take projected picture by CCD over against projection screen;
(S4102) by computer the projected picture image that photographs is rotated analyzing and processing, the brightness value of projected picture image is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |; Initial non-zero brightness value coordinate refers to the coordinate figure that first brightness value in every row pixel is not equal to 0 pixel, finishes non-zero brightness value coordinate and refers to the coordinate figure that last brightness value in every row pixel is not equal to 0 pixel;
If satisfy Δ y
1=Δ y
2=...=Δ y
n, then if coordinate y
1=y
2=...=y
n, then do not need to adjust, if y
1≠ y
2≠ ... ≠ y
n, then ask for the knob anglec of rotation θ that rotation is adjusted by approximate algorithm
Knob, computer controlled automatic is used to rotate the knob rotation θ of adjustment
KnobWherein in the approximate algorithm
θ
1For representing that the projected picture image departs from the angle of horizontal direction, works as θ
10 o'clock, the rotation of expression clockwise direction, otherwise rotation counterclockwise;
(S4103) adjust the y of back circulation execution in step (S4101)-(S4102) to the up-to-date projected picture image
1=y
2=...=y
nTill.
After finishing the rotation adjustment, also carry out the convergent-divergent adjustment projected picture image is controlled at projection screen inside according to above-mentioned steps (S3).
In an embodiment, after the rotation adjustment of finishing projected picture, carry out the vertical slope adjustment, purpose is to make image to be presented on the projection screen undistortedly; When the adjustment object was the vertical slope adjustment, the concrete steps of described step (S41) were:
(S4111) take projected picture by CCD over against projection screen;
(S4112) by computer the projected picture image that photographs is carried out the vertical slope analyzing and processing, as shown in Figure 5, the image brightness value is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |, if satisfy Δ y
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n', then do not need the knob that is used for the vertical slope adjustment is adjusted, be used for the θ that vertical slope is adjusted otherwise utilize approximate algorithm to calculate and obtain
KnobThe angle is wherein in the approximate algorithm
If θ
10, then the knob by the adjustment of computer controlled automatic vertical slope counterclockwise rotates θ
KnobThe image bottom is shunk, otherwise then the knob θ that vertical slope is adjusted is diverted in dextrorotation
Knob, make the expansion of image bottom;
(S4113) adjusting the back continues execution in step (S4111)-(S4112) and carries out vertical slope and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n' till.
After finishing the vertical slope adjustment, also carry out the convergent-divergent adjustment projected picture image is controlled at projection screen inside according to above-mentioned steps (S3).
In an embodiment, after finishing the vertical slope adjustment, carry out the horizontal displacement adjustment according to above-mentioned steps (S41), purpose is to make image be positioned at projection screen central authorities in the horizontal direction, its concrete steps are:
(S4121) take projected picture by CCD over against projection screen;
(S4122) by computer the projected picture image that photographs being carried out Analysis of Lateral Displacement handles, as shown in Figure 6, the projected picture image is judged line by line, when certain row has continuous brightness value f (x, y)=1 o'clock, first and last brightness value of writing down this journey respectively is 0 and 1 coordinate figure (x
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make Δ x
1=| x
n-x
1|, Δ x
n=| x
1'-x
n' |, if Δ x
1=Δ x
n, then do not need the knob that is used for the horizontal displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that horizontal direction is adjusted
Knob, wherein in the approximate algorithm
If Δ x
1＜Δ x
n, then the knob of computer control horizontal displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(S4123) adjusting the back continues execution in step (S4121)-(S4122) and carries out horizontal displacement and be adjusted to Δ x in the up-to-date projected picture image
1=Δ x
nTill.
After finishing the horizontal displacement adjustment, also carry out the convergent-divergent adjustment projected picture image is controlled at projection screen inside according to above-mentioned steps (S3).
In an embodiment, after finishing the horizontal displacement adjustment, carry out the vertical displacement adjustment according to above-mentioned steps (S41), make image be positioned at projection screen central authorities in vertical direction, concrete steps are:
(S4131) take projected picture by CCD over against projection screen;
(S4132) by computer the projected picture image that photographs is carried out the vertical displacement analyzing and processing, as shown in Figure 7, the projected picture image is judged by row, when certain shows continuous brightness value f (x, y)=1 o'clock, first and last brightness of writing down these row respectively is 0 and 1 coordinate figure (x
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n'); Make Δ y
1=| y
n-y
1|, Δ y
n=| y
1'-y
n' |, if Δ y
1=Δ y
n, then do not need the knob that is used for the vertical displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that vertical direction is adjusted
Knob, wherein in the approximate algorithm
If Δ y
1＜Δ y
n, then the knob of computer control vertical displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(S4133) adjusting the back continues execution in step (S4131)-(S4132) and carries out vertical displacement and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
nTill.
Through the adjustment of front, image has been positioned at the centre of projection screen.Therefore, as long as image is amplified, it is in full screen on the screen gets final product.Therefore, also image is amplified adjustment after finishing the vertical displacement adjustment, concrete steps are:
(S101) take projected picture by CCD over against projection screen;
(S102) by computer the projected picture image that photographs is amplified analyzing and processing, the projected picture image is judged by row, as shown in Figure 8;
(x, y)=1 o'clock, first and last brightness of writing down these row respectively are 0 and 1 coordinate figure (x when certain shows continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make r=|y
1'-y
1|, R=|y
n'-y
n|, if r=R does not then need to amplify adjustment; Amplify the adjustment amount θ that adjusts otherwise utilize approximate algorithm to obtain
Knob, wherein, the θ in the approximate algorithm
1=R-r, computer controlled automatic is amplified the knob of adjusting, and makes it counterclockwise rotate θ
Knob
(S104) adjust back continuation execution in step (S101)-(S102) and amplify till the r=R that is adjusted in the up-to-date projected picture image, make image be full of whole projection screen.
The above only is a preferred implementation of the present invention, should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can do the improvement of some suitable actual conditions to technical scheme of the present invention.Therefore, protection scope of the present invention is not limited thereto, and those of skill in the art are any to be included within protection range of the present invention based on non-material change on the technical solution of the present invention.
Claims (10)
1. the full degree of freedom is adjusted the method for projected picture position and size, it is characterized in that, comprises the steps:
(1) by DLP projection standardized test chart;
(2) take projected picture by CCD over against projection screen;
(3) data of taking by Computer Processing are obtained the adjustment amount that convergent-divergent is adjusted, and utilize the knob of convergent-divergent adjustment correspondence that projected picture is adjusted;
(4) adjust as adjusting object with rotation adjustment, vertical slope adjustment, horizontal displacement adjustment and vertical displacement successively, circulation execution following steps are finished the adjustment to projected picture:
(41) take projected picture by CCD over against projection screen, utilize approximate algorithm that the data that photograph are carried out analyzing and processing by computer, obtain the adjustment amount of adjustment object correspondence and adjust direction, computer is controlled corresponding knob according to the adjustment amount of adjusting the object correspondence automatically with the adjustment direction and is adjusted.
2. the full degree of freedom according to claim 1 is adjusted the method for projected picture position and size, it is characterized in that the concrete steps of described step (3) are:
By computer the data that photograph are carried out the convergent-divergent analyzing and processing, give a coordinate (x with each pixel in the projected picture image, y), judge first row pixel and last column pixel of projected picture image, brightness value f (the x of the first row pixel and last row pixel, y) whether all be 0, if then do not carry out any operation, otherwise the knob that computer controlled automatic is used for the convergent-divergent adjustment dwindles first row pixel and last column pixel until the projected picture image to image, (x is till 0 y) to the brightness value f of the first row pixel and last row pixel.
3. the full degree of freedom according to claim 1 is adjusted the method for projected picture position and size, it is characterized in that approximate algorithm is specially:
To adjust the corresponding knob of object two angle step θ of rotation arbitrarily in advance
Knob 1, θ
Knob 2, and obtain the pairing image in corresponding knob rotation back and adjust increment θ
Image 1, θ
Image 2, substitution equation θ
Knob=α θ
Image+ β obtains the value of α, β, wherein θ
KnobThe angle step of expression knob rotation, θ
ImageFor image is adjusted increment;
To carry out the corresponding adjustment amount θ that analyzing and processing gets access to the projected picture image that photographs
1As θ
ImageSubstitution equation θ
Knob=α θ
Image+ β asks for corresponding θ
Knob, according to the θ that asks for
KnobRegulate corresponding knob;
When being carried out analyzing and processing, calculates the projected picture image of next time taking the new adjustment amount θ that gets access to
2
The θ that asks for according to the last time
KnobWith the θ that obtains in advance
Knob 1, θ
Knob 2Compare, if | θ
Knob-θ
Knob 1|≤| θ
Knob-θ
Knob 2|, then (θ
Knob, θ
1), (θ
Knob 1, θ
Image 1) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β, otherwise (θ
Knob, θ
1), (θ
Knob 2, θ
Image 2) the former linear equation θ of substitution
Knob=α θ
Image+ β obtains the value of α, β;
θ
2, α, the β substitution equation newly asked for, obtain θ
Knob
4. the full degree of freedom according to claim 3 is adjusted the method for projected picture position and size, it is characterized in that, when adjusting object for the rotation adjustment, the concrete steps of described step (41) are:
(4101) take projected picture by CCD over against projection screen;
(4102) by computer the projected picture image that photographs is rotated analyzing and processing, the brightness value of projected picture image is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |;
If satisfy Δ y
1=Δ y
2=...=Δ y
n, then if coordinate y
1=y
2=...=y
n, then do not need to adjust, if y
1≠ y
2≠ ... ≠ y
n, then ask for the knob anglec of rotation θ that rotation is adjusted by approximate algorithm
Knob, computer controlled automatic is used to rotate the knob rotation θ of adjustment
KnobWherein in the approximate algorithm
θ
1For representing that the projected picture image departs from the angle of horizontal direction, works as θ
10 o'clock, the rotation of expression clockwise direction, otherwise rotation counterclockwise;
(4103) adjust the y of circulation execution in step (4101)-(4102), back to the up-to-date projected picture image
1=y
2=...=y
nTill.
5. the full degree of freedom according to claim 4 is adjusted the method for projected picture position and size, it is characterized in that, carries out the vertical slope adjustment after the rotation adjustment of finishing projected picture;
When the adjustment object was the vertical slope adjustment, the concrete steps of described step (41) were:
(4111) take projected picture by CCD over against projection screen;
(4112) by computer the projected picture image that photographs is carried out the vertical slope analyzing and processing, the image brightness value is judged that by row every row are judged from top to bottom, write down the initial non-zero brightness value of every row coordinate (x from left to right
n, y
n) and finish non-zero brightness value coordinate (x
n', y
n'), remember that the vertical range between them is Δ y
n=| y
n-y
n' |, if satisfy Δ y
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n', then do not need the knob that is used for the vertical slope adjustment is adjusted, be used for the θ that vertical slope is adjusted otherwise utilize approximate algorithm to calculate and obtain
KnobThe angle is wherein in the approximate algorithm
If θ
10, then the knob by the adjustment of computer controlled automatic vertical slope counterclockwise rotates θ
KnobThe image bottom is shunk, otherwise then the knob θ that vertical slope is adjusted is diverted in dextrorotation
Knob, make the expansion of image bottom;
(4113) adjusting the back continues execution in step (4111)-(4112) and carries out vertical slope and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
2=...=Δ y
n, and coordinate y
1=y
2=...=y
n, y
1'=y
2'=...=y
n' till.
6. the full degree of freedom according to claim 5 is adjusted the method for projected picture position and size, it is characterized in that, carries out the horizontal displacement adjustment after finishing the vertical slope adjustment;
When adjusting object is the horizontal displacement adjustment, and the concrete steps of described step (41) are:
(4121) take projected picture by CCD over against projection screen;
(4122) by computer the projected picture image that photographs being carried out Analysis of Lateral Displacement handles, the projected picture image is judged line by line, (x, y)=1 o'clock, first and last brightness value of writing down this journey respectively are 0 and 1 coordinate figure (x when certain row has continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make Δ x
1=| x
n-x
1|, Δ x
n=| x
1'-x
n' |, if Δ x
1=Δ x
n, then do not need the knob that is used for the horizontal displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that horizontal direction is adjusted
Knob, wherein in the approximate algorithm
If Δ x
1＜Δ x
n, then the knob of computer control horizontal displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(4123) adjusting the back continues execution in step (4121)-(4122) and carries out horizontal displacement and be adjusted to Δ x in the up-to-date projected picture image
1=Δ x
nTill.
7. the full degree of freedom according to claim 6 is adjusted the method for projected picture position and size, it is characterized in that described method is also carried out the convergent-divergent adjustment according to step (3) the projected picture image is controlled at projection screen inside after finishing rotation adjustment, vertical slope adjustment or horizontal displacement adjustment.
8. the full degree of freedom according to claim 7 is adjusted the method for projected picture position and size, it is characterized in that, carries out the vertical displacement adjustment after finishing the horizontal displacement adjustment;
When adjusting object is the vertical displacement adjustment, and the concrete steps of described step (41) are:
(4131) take projected picture by CCD over against projection screen;
(4132) by computer the projected picture image that photographs is carried out the vertical displacement analyzing and processing, the projected picture image is judged by row, (x, y)=1 o'clock, first and last brightness of writing down these row respectively are 0 and 1 coordinate figure (x when certain shows continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n'); Make Δ y
1=| y
n-y
1|, Δ y
n=| y
1'-y
n' |, if Δ y
1=Δ y
n, then do not need the knob that is used for the vertical displacement adjustment is adjusted; Otherwise, utilize approximate algorithm to calculate and be used for the side-play amount θ that vertical direction is adjusted
Knob, wherein in the approximate algorithm
If Δ y
1＜Δ y
n, then the knob of computer control vertical displacement direction adjustment makes it counterclockwise rotate θ
Knob, otherwise, make its clockwise direction rotation θ
Knob
(4133) adjusting the back continues execution in step (4131)-(4132) and carries out vertical displacement and be adjusted to Δ y in the up-to-date projected picture image
1=Δ y
nTill.
9. the full degree of freedom according to claim 8 is adjusted the method for projected picture position and size, it is characterized in that described method is also amplified adjustment to image after finishing the vertical displacement adjustment, and concrete steps are:
(101) take projected picture by CCD over against projection screen;
(102) by computer the projected picture image that photographs is amplified analyzing and processing, the projected picture image is judged by row;
(x, y)=1 o'clock, first and last brightness of writing down these row respectively are 0 and 1 coordinate figure (x when certain shows continuous brightness value f
1, y
1), (x
1', y
1'), (x
n, y
n), (x
n', y
n');
Make r=|y
1'-y
1|, R=|y
n'-y
n|, if r=R does not then need to amplify adjustment; Amplify the adjustment amount θ that adjusts otherwise utilize approximate algorithm to obtain
Knob, wherein, the θ in the approximate algorithm
1=R-r, computer controlled automatic is amplified the knob of adjusting, and makes it counterclockwise rotate θ
Knob
(103) adjusting continuation execution in step (101)-(102), back amplifies till the r=R that is adjusted in the up-to-date projected picture image.
10. adjust the method for projected picture position and size according to each described full degree of freedom of claim 1 to 9, it is characterized in that described standardized test chart is the white rectangle resolution chart.
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| CN201310079185.5A CN103220482B (en) | 2013-03-12 | 2013-03-12 | A kind of full degree of freedom adjusts the method for projected picture position and size |
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