CN107547880A - A kind of auto-correction method of projection imaging, device and laser television - Google Patents
A kind of auto-correction method of projection imaging, device and laser television Download PDFInfo
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- CN107547880A CN107547880A CN201610475002.5A CN201610475002A CN107547880A CN 107547880 A CN107547880 A CN 107547880A CN 201610475002 A CN201610475002 A CN 201610475002A CN 107547880 A CN107547880 A CN 107547880A
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Abstract
The embodiment of the present application provides a kind of auto-correction method of projection imaging, including：Designated area image is obtained by preset image capture device, designated area image includes：The projection imaging of original image and screen picture；Each drift angle coordinate of the projection imaging of original image is determined, and, each drift angle coordinate of screen picture；Calculate the horizontal range and vertical range of each drift angle drift angle corresponding with screen picture of the projection imaging of original image；Judge whether there is the horizontal range of drift angle corresponding with screen picture in each drift angle of the projection imaging of original image, and/or, vertical range is more than the observing angle of default distance threshold；If so, the abscissa of drift angle corresponding with the observing angle of the projection imaging of original image in default original image is then corrected as default step-length, and/or, ordinate.The embodiment of the present application is operated without user so that in the case of unprofessional commissioning staff, can also carry out the debugging of laser television.
Description
Technical field
The application is related to technical field of image processing, more particularly to a kind of auto-correction method of projection imaging, one kind
The automatic correction device of projection imaging and a kind of laser television.
Background technology
Laser television is a kind of new product for being combined LASER Light Source with ultra short focal projector technology.Reference picture 1 is laser
The schematic diagram of TV.Laser television includes：Projector, cabinet for TV, screen.Projector can project vertically upward, put close
Large scale projection imaging can be launched out in the cabinet for TV of wall to screen, in order to ideally show image, it is necessary to screen
The parallel relation of projection plane and the camera lens of projector is very strict.
When installing laser television, it is necessary to which professional is corrected to projector's fuselage positions, then by projector
Fuselage is screwed in cabinet for TV, makes projection and screen coincident.It installs complexity, is unfavorable for user and voluntarily installs, and machine
Once fixed, putting position is limited body.If but do not fix fuselage, when user's imprudence encounters fuselage so that throw
Shadow machine fuselage positions are offset, and projection deforms.Projected into due to being debugged to the putting position of projector's fuselage with correcting
Professional as having, user is difficult to correction projection imaging is voluntarily adjusted.
The content of the invention
In view of the above problems, it is proposed that the embodiment of the present application overcomes above mentioned problem or at least in part to provide one kind
A kind of auto-correction method of the projection imaging to solve the above problems, a kind of automatic correction device of projection imaging and a kind of laser
TV.
In order to solve the above problems, the embodiment of the present application discloses a kind of auto-correction method of projection imaging, including：
Designated area image is obtained by preset image capture device, the designated area image includes：Original image
Projection imaging and screen picture；
Each drift angle coordinate of the projection imaging of the original image is determined, and, each drift angle of the screen picture
Coordinate；
Calculate each drift angle drift angle corresponding with the screen picture of the projection imaging of the original image it is horizontal away from
From and vertical range；
Judge whether there is top corresponding with the screen picture in each drift angle of the projection imaging of the original image
The horizontal range at angle, and/or, vertical range is more than the observing angle of default distance threshold；
If so, then correct the target in default original image with the projection imaging of the original image by default step-length
The abscissa of drift angle corresponding to drift angle, and/or, ordinate.
Preferably, each drift angle coordinate of the projection imaging for determining the original image, and, the screen picture
Each drift angle coordinate the step of include：
Calculate the Haas matrix of each point of the designated area image；
Calculate the Haas determinant of a matrix value and mark；
Using the Haas determinant of a matrix value and mark, the angle point intensity level of each point is calculated；
When the angle point intensity level of point is more than or equal to predetermined threshold value, using the coordinate of the point as apex coordinate.
Preferably, it is described then to correct the projection imaging in default original image with the original image by default step-length
Observing angle corresponding to drift angle abscissa, and/or, include the step of ordinate：
If between the observing angle of the projection imaging of original image drift angle corresponding with the screen picture only
Horizontal range, or, vertical range are more than default distance threshold, then by default step-length correct in default original image with institute
State the abscissa of drift angle corresponding to the observing angle of the projection imaging of original image, or, ordinate.
Preferably, it is described then to correct the projection imaging in default original image with the original image by default step-length
Observing angle corresponding to drift angle abscissa, and/or, also include the step of ordinate：
If the level between the observing angle of the projection imaging of original image drift angle corresponding with the screen picture
Distance, and, vertically away from all from more than default distance threshold, then correct in default original image by default step-length corresponding to
The abscissa of drift angle, or, ordinate, obtain a correction chart picture；
The ordinate of corresponding drift angle in a correction chart picture, or, abscissa are corrected by default step-length.
Preferably, in addition to：
The image that original image is obtained after corrected and the misaligned area filling of original image are particular color.
Meanwhile the embodiment of the present application also discloses a kind of automatic correction device of projection imaging, including：
Image collection module, for obtaining designated area image, the designated area by preset image capture device
Image includes：The projection imaging of original image and screen picture；
Coordinate determining module, each drift angle coordinate of the projection imaging for determining the original image, and, the screen
Each drift angle coordinate of curtain image；
Distance calculation module, each drift angle and the screen picture pair of the projection imaging for calculating the original image
The horizontal range and vertical range for the drift angle answered；
Judge module, for judge the original image projection imaging each drift angle in whether have and the screen map
The horizontal range of corresponding drift angle as in, and/or, vertical range is more than the observing angle of default distance threshold；
Correction module, if for there is observing angle in each drift angle of the projection imaging of the original image, by pre-
If step-length correct the horizontal stroke of drift angle corresponding with the observing angle of the projection imaging of the original image in default original image
Coordinate, and/or, ordinate.
Preferably, the coordinate determining module further comprises：
Haas matrix computations submodule, for calculating the Haas matrix of each point in the designated area image；
Calculation of characteristic parameters submodule, for calculating the Haas determinant of a matrix value and mark of each point；
Angle point intensity level calculating sub module, for using the Haas determinant of a matrix value and mark, calculate each point
Angle point intensity level；
Drift angle coordinate determination sub-module, when the angle point intensity level for being put when certain is more than or equal to predetermined threshold value, by the point
Coordinate as apex coordinate.
Preferably, the correction module further comprises：
First correction module, if in the observing angle of the projection imaging of the original image and the screen picture
There was only horizontal range between corresponding drift angle, or, vertical range is more than default distance threshold, then is corrected by default step-length pre-
If original image in drift angle corresponding with the observing angle of the projection imaging of the original image abscissa, or, ordinate.
Preferably, the correction module still further comprises：
Second correction module, if observing angle and the screen picture pair for the projection imaging of the original image
Horizontal range between the drift angle answered, and, vertically away from all from more than default distance threshold, then being corrected by default step-length default
Original image in corresponding drift angle abscissa, or, ordinate obtains a correction chart picture；
3rd correction module, for correcting the ordinate of corresponding drift angle in a correction chart picture by default step-length,
Or, abscissa.
Preferably, in addition to：
Module is filled, for image and the misaligned area filling of original image for obtaining original image after corrected
For particular color.
Meanwhile the embodiment of the present application also discloses a kind of laser television, including：Projector, screen, automatic correction device；
The automatic correction device includes：
Image collection module, for obtaining designated area image, the designated area by preset image capture device
Image includes：The projection imaging of original image and screen picture；
Coordinate determining module, each drift angle coordinate of the projection imaging for determining the original image, and, the screen
Each drift angle coordinate of curtain image；
Distance calculation module, each drift angle and the screen picture pair of the projection imaging for calculating the original image
The horizontal range and vertical range for the drift angle answered；
Judge module, for judge the original image projection imaging each drift angle in whether have and the screen map
The horizontal range of corresponding drift angle as in, and/or, vertical range is more than the observing angle of default distance threshold；
Correction module, if for there is observing angle in each drift angle of the projection imaging of the original image, by pre-
If step-length correct the horizontal stroke of drift angle corresponding with the observing angle of the projection imaging of the original image in default original image
Coordinate, and/or, ordinate.
The embodiment of the present application includes advantages below：
The embodiment of the present application is sat by the projection imaging according to the original image obtained automatically and the drift angle of screen picture
Mark.When distance between the projection imaging drift angle of original image and each of screen picture is more than predetermined threshold value, by certain
Step iteration correct original image drift angle coordinate, until it is corrected after original image projection imaging each drift angle with
The distance of each corresponding drift angle of screen picture is less than predetermined threshold value.The embodiment of the present application is operated without user so that
In the case of there is no professional commissioning staff, the debugging of laser television can be also carried out.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing laser television；
Fig. 2 is a kind of schematic diagram of the auto-correction method of projection imaging during the application is implemented；
Fig. 3 is a kind of step flow chart of the auto-correction method embodiment of projection imaging of the application
Fig. 4 is to carry out the schematic diagram of level correction to the drift angle coordinate of original image in the embodiment of the present application；
Fig. 5 is to carry out the signal of projection imaging after level correction to the drift angle coordinate of original image in the embodiment of the present application
Figure；
Fig. 6 is to carry out the schematic diagram of vertical correction to the drift angle coordinate of original image in the embodiment of the present application
Fig. 7 is to carry out the signal of projection imaging after vertical correction to the drift angle coordinate of original image in the embodiment of the present application
Figure；
Fig. 8 is a kind of structured flowchart of the automatic correction device embodiment of projection imaging of the application；
Fig. 9 is a kind of structured flowchart of laser television embodiment of the application.
Embodiment
It is below in conjunction with the accompanying drawings and specific real to enable the above-mentioned purpose of the application, feature and advantage more obvious understandable
Mode is applied to be described in further detail the application.
Reference picture 2, it is a kind of schematic diagram of the auto-correction method of projection imaging during the application is implemented.Implement in the application
In example, at a certain distance from projector is usually placed in below screen and leaves metope.Certainly, the application is applied equally to other
The situation of projector's modes of emplacement.
On screen, the point Op for reaching metope by lens centre using light source of projector Os establishes screen as the origin of coordinates
Coordinate system OpXpYpZp, Xp axle are that Yp axles are horizontal direction, and Zp axles are vertical direction perpendicular to the direction of metope.
Inside projector, using light source of projector OS as the origin of coordinates, it is water to establish projected coordinate system OsXsYsZs, Xs axle
Square to Ys axles are vertical direction, and Zs axles are projecting direction direction.
Light source Os, which is projected to original image ABCD by lens, turns into projection imaging A1B1C1D1 on metope.Light source, thoroughly
Mirror, original image ABCD all in projector, the original image ABCD being projected at a certain distance from from light source Os points, and with
Projecting direction is orthogonal.
Except non-specifically installing, the angle of projection light is not perpendicular to metope, but a vertical direction is presented and is more than 90 degree
Angle u.Further, since projector's fuselage puts the reason for not exclusively positive so that projection light is presented one in the horizontal direction with screen
Projectional angle v more than 0 degree.The non-zero rotated around X-axis possibly even is presented due to placing the cabinet for TV uneven surface of projector
Angle.When the projecting direction of projection light is with screen out of plumb, projection imaging A1B1C1D1 can not be with screen E1F1G1H1 weights
Close.
One of core idea of the embodiment of the present application is, in each drift angle of the projection imaging of original image and screen picture
The distance between each drift angle when being more than predetermined threshold value, the drift angle coordinate of original image is corrected by certain step iteration, directly
The projection imaging of original image to after corrected is less than predetermined threshold value with the distance of each drift angle of screen picture.
Reference picture 3, a kind of step flow chart of the auto-correction method embodiment of projection imaging of the application is shown, had
Body may include steps of：
Step 101, designated area image is obtained by preset image capture device, the designated area image includes：
The projection imaging of original image and screen picture；
Blue light is projected when projector starts shooting to (projection imaging should be had any different with wall color) on metope, when projector position
When angle sets undesirable, projection imaging A1B1C1D1 does not overlap with screen E1F1G1H1.
In the embodiment of the present application, image capture device can be installed (for example, shooting close to the position of projector lens
Head), and make its shooting direction consistent with projecting direction and keep fixed.For example, it can be placed on projection lens frame.Pass through
Image capture device obtains the image (image of metope) in the region of the projecting direction face of projector lens, image capture device
Include in accessed image：Projection imaging A1B1C1D1 and screen image E1F1G1H1.
Step 102, each drift angle coordinate of the projection imaging of the original image is determined, and, the screen picture
Each drift angle coordinate；
In the embodiment of the present application, using light source of projector Os by lens centre reach metope point Op as the origin of coordinates,
Screen coordinate system OpXpYpZp is established, determines that the projection imaging A1B1C1D1 of original image each drift angle is sat in screen coordinate system
It is marked with and screen picture E1F1G1H1 each drift angle coordinate.Certainly, those skilled in the art can otherwise set coordinate
System, and drift angle coordinate is determined according to the coordinate system of setting, the application is not construed as limiting to this.
Step 103, each drift angle drift angle corresponding with the screen picture of the projection imaging of the original image is calculated
Horizontal range and vertical range；
Calculated according to each drift angle coordinates of projection imaging A1B1C1D1 and screen picture E1F1G1H1, between corresponding drift angle
Horizontal range and vertical range.
Specifically, projection imaging A1B1C1D1 upper left drift angle A1 and screen picture E1F1G1H1 upper left drift angle E1 water
Flat distance is：DxA1E1=| A1x-E1x |；Vertical range is：DyA1E1=| A1y-E1y |；
Projection imaging A1B1C1D1 upper right drift angle B1 and screen picture E1F1G1H1 upper right drift angle F1 horizontal range
For：DxB1F1=| B1x-F1x |；Vertical range is：DyB1F1=| B1y-F1y |；
Projection imaging A1B1C1D1 bottom right drift angle C1 and screen picture E1F1G1H1 bottom right drift angle G1 horizontal range
For：DxC1G1=| C1x-G1x |；Vertical range is：DyC1G1=| C1y-G1y |；
Projection imaging A1B1C1D1 lower-left drift angle D1 and screen picture E1F1G1H1 lower-left drift angle H1 horizontal range
For：DxD1H1=| D1x-H1x |；Vertical range is：DyD1H1=| D1y-H1y |；
Step 104, judge whether to have in each drift angle of the projection imaging of the original image with the screen picture
The horizontal range of corresponding drift angle, and/or, vertical range is more than the observing angle of default distance threshold；
Judge in currently assigned area image whether have in the projection imaging A1B1C1D1 of original image each drift angle,
The horizontal range of drift angle corresponding with screen picture E1F1G1H1, and/or, vertical range is more than the mesh of default distance threshold
Mark drift angle.
Step 105, projected into if so, then being corrected by default step-length in default original image with the original image
As observing angle corresponding to drift angle abscissa, and/or, ordinate.
If have in the projection imaging A1B1C1D1 of original image each drift angle corresponding with screen picture E1F1G1H1
Drift angle horizontal range, and/or, vertical range be more than default distance threshold observing angle, then according to default step-length
Correct the horizontal stroke of drift angle corresponding with the projection imaging A1B1C1D1 of original image observing angle in default original image ABCD
Coordinate, and/or, ordinate.
In the embodiment of the present application, the method that can specifically use image filtering compression, to the picture of each row in original image
Vegetarian refreshments carries out image filtering compression, to correct the drift angle coordinate of original image.
As a kind of preferred exemplary of the embodiment of the present application, described method can also include：
The image that original image is obtained after corrected and the misaligned area filling of original image are particular color.
After the drift angle coordinate for correcting original image, image and the misaligned area filling of original image after calibration are spy
Fixed color (generally black), obtains new original image (image being projected).So in the new original graph of light source projects
During picture, the position of the projection imaging of object region will be corrected.
After the drift angle coordinate for often correcting an original image, then new original image is projected；Then measure again
The horizontal range and vertical range of each drift angle drift angle corresponding with screen picture of the projection imaging of original image；If original graph
As projection imaging each drift angle in still have drift angle corresponding with screen picture horizontal range, and/or, vertical range
More than the observing angle of predetermined threshold value, then the coordinate of drift angle corresponding with observing angle in original image is corrected again.Repeat this
The iterative operation of sample, until original image projection imaging each drift angle drift angle corresponding with screen picture horizontal range and
Vertical range is both less than predetermined threshold value.
The embodiment of the present application is sat by the projection imaging according to the original image obtained automatically and the drift angle of screen picture
Mark.When distance between the projection imaging drift angle of original image and each of screen picture is more than predetermined threshold value, by certain
Step iteration correct original image drift angle coordinate, until it is corrected after original image projection imaging each drift angle with
The distance of each corresponding drift angle of screen picture is less than predetermined threshold value.The embodiment of the present application is operated without user so that
In the case of there is no professional commissioning staff, the debugging of laser television can be also carried out.
In a kind of preferred exemplary of the embodiment of the present application, the drift angle coordinate of image can pass through Harris＆Stephens
(Harris ＆ Stephens) algorithm calculates, and the step 102 can specifically include following sub-step：
Sub-step S11, calculate the Haas matrix of each point in the designated area image；
Assuming that the coordinate of any is (x, y) on image, Haas matrix is specially：
Wherein, Ix is the partial derivative of horizontal direction, and Iy is vertical direction
Partial derivative, ω (x, y) are Gaussian function；
Sub-step S12, calculate the Haas determinant of a matrix value and mark of each point；
Haas matrix can be simplified shown as：A=ω (x, y) * Ix2, b=ω (x, y) * IxIy, c=
ω (x, y) * IxIy, d=ω (x, y) * Iy2。
Determinant det (H)=a*d-b*c；Mark trace (H)=a+d.
Sub-step S13, using the Haas determinant of a matrix value and mark, calculate the angle point intensity level of each point；
Angle intensity level CV=det (H)-α * trace (H)2, α is adjustable parameter, and general span is (0.04-0.06)；
Sub-step S14, when the angle point intensity level of certain point is more than or equal to predetermined threshold value, using the coordinate of the point as summit
Coordinate
If the angle intensity level CV of certain point is more than or equal to predetermined threshold value, the point is exactly summit, is not otherwise summit.
In another preferred exemplary of the embodiment of the present application, the drift angle coordinate of image can using edge detection algorithm come
It is determined that the sideline in designated area image is determined by edge detection algorithm, wherein the intersection point in 2 sidelines is summit.
It is determined that current original image projection imaging each drift angle coordinate and screen picture each drift angle coordinate
Afterwards, according between each summit of each drift angle coordinate can of each the drift angle coordinate and screen picture of projection imaging calculating
Horizontal range and vertical range.Then according between each drift angle coordinate of each the drift angle coordinate and screen picture of projection imaging
Horizontal range and vertical range judge whether to need to correct original image again.
When correcting original image, the abscissa of original image drift angle, ordinate are corrected by default step-length.It is used as this
Apply for a kind of preferred exemplary of embodiment, it is described by default step-length correct in default original image with the original image
The abscissa of drift angle corresponding to the observing angle of projection imaging, and/or, following sub-step can be included the step of ordinate：
Sub-step S21, if the observing angle of the projection imaging of original image top corresponding with the screen picture
There was only horizontal range between angle, or, vertical range is more than default distance threshold, then is corrected by default step-length default original
The abscissa of drift angle corresponding with the observing angle of the projection imaging of the original image in image, or, ordinate.
In the embodiment of the present application, the observing angle in the projection imaging of original image can include：Only and screen picture
In corresponding drift angle horizontal range, or, vertical range be more than default distance threshold first kind observing angle；And with
The horizontal range of corresponding drift angle in screen picture, and, vertical range is both greater than the second class target top of default distance threshold
Angle.
If the observing angle of projection imaging is first kind observing angle, when correcting original image, by default step-length school
The abscissa of drift angle corresponding with the observing angle of the projection imaging of original image in just default original image, or, ordinate.
For example, the horizontal range between the left drift angle of the left drift angle and screen picture of projection imaging is more than predetermined threshold value, hang down
Straight distance is less than predetermined threshold value, i.e. the left drift angle of projection imaging is first kind observing angle.When correcting original image, to original
The abscissa of the left drift angle of image corrects the length of a default step-length.
As a kind of preferred exemplary of the embodiment of the present application, it is described by default step-length correct in default original image with
The abscissa of drift angle corresponding to the observing angle of the projection imaging of the original image, and/or, it can also wrap the step of ordinate
Include following sub-step：
Sub-step S22, if the observing angle of the projection imaging of original image drift angle corresponding with the screen picture
Between horizontal range, and, vertically away from all from more than default distance threshold, then correcting default original graph by default step-length
The abscissa of corresponding drift angle as in, or, ordinate, obtain a correction chart picture；
If the observing angle of projection imaging is the second class observing angle, when correcting original image, first by default step-length
The abscissa of drift angle corresponding with the observing angle of the projection imaging of original image or ordinate in default original image are entered
Row once corrects, and the image after the positive abscissa of high-ranking officers or ordinate is as a correction chart picture.
Sub-step S23, the ordinate of corresponding drift angle in a correction chart picture, or, abscissa are corrected by default step-length.
Secondary correction is continued to corresponding drift angle in a correction chart picture.If the drift angle of a timing correction is
Abscissa, then during secondary correction, correct the ordinate of a correction chart picture；If the drift angle of a timing correction is vertical seat
Mark, then during secondary correction, correct the abscissa of a correction chart picture.
In the embodiment of the present application, the length of one default step-length of vertical angles coordinates correction includes：One step-length of increase
Length (abscissa moves to right or ordinate moves up), reduce the length of a step-length (abscissa moves to left or ordinate moves down).Step-length
The direction of correction, the relative position of the observing angle drift angle corresponding with screen picture depending on projection imaging.
If the difference of the horizontal range of the observing angle of projection imaging drift angle corresponding with screen picture (projects into less than 0
As observing angle in screen picture corresponding to drift angle left side), then in original image corresponding drift angle abscissa increase
One step-length (moving to right customization).
It is corresponding with screen picture with the observing angle of projection imaging i.e. to the direction of the drift angle calibration step of original image
Drift angle the opposite direction of relative position.
During being corrected to the drift angle of original image, if the drift angle of projection imaging drift angle corresponding with screen picture
Between abscissa difference or ordinate difference, from the occasion of becoming negative value or become from negative value on the occasion of rear, projection imaging and screen
The distance between drift angle corresponding to image is still above default threshold value；It is considered that default step-length is long, therefore reduce default
Step-length, and the direction opposite according to the direction corrected with last time timing step-length continues to carry out school to the drift angle of original image
Just, until the distance between projection imaging drift angle corresponding with screen picture is less than default threshold value.
For example, after original image ABCD drift angle A abscissa is corrected to the right into an initial step length distance, project into
The drift angle E1 left side as corresponding to A1V1C1D1 drift angle A1 from screen picture E1F1G1H1, it is moved to right side (drift angle A1 and top
The difference of abscissa becomes on the occasion of now, the difference of abscissa is still big between drift angle A1 and drift angle E1 from negative value between the E1 of angle
In default threshold value.The then half by current step size settings for initial step length, then by original image ABCD drift angle A horizontal stroke
Coordinate corrects the distance of a current step to the left.
In order that those skilled in the art better understood when the embodiment of the present application, below by an example to this Shen
Please embodiment be illustrated.
It is that the schematic diagram of level correction is carried out to the drift angle coordinate of original image in the embodiment of the present application shown in reference picture 4.
In figure, level correction is carried out to original image ABCD summit A.First, by A points move right a step-length distance to A'1,
B, C, D point remain stationary as.Specifically can be by carrying out the method for image scaling processing to the pixel of each row of original image come real
The correction of existing vertical angles coordinate.
It is to being projected into after the drift angle coordinate progress level correction of original image in the embodiment of the present application shown in reference picture 5
The schematic diagram of picture.When in original image ABCD, when summit A is corrected to A'1, projected image A1B1C1D1 drift angle A1 moves right
To A1'1.Now, the drift angle E1 of projected image A1'1B1C1D1 drift angle A1'1 and screen picture horizontal range still above
Predetermined threshold value.Because drift angle A1'1 is in drift angle E1 left side, therefore horizontal range value is negative value.
By original image A'1BCD drift angle A'1 move right a step-length distance to A'2, then projection imaging A1'
1B1C1D1 drift angle A1'1 moves right to A1'2.Now, projected image A1'2B1C1D1 drift angle A1'2 and screen picture
Drift angle E1 horizontal range is still above predetermined threshold value.Because drift angle A1'2 is in drift angle E1 left side, therefore horizontal range value is still
For negative value.
By original image A'2BCD drift angle A'2 move right a step-length distance to A'3, then projection imaging A1'
Drift angle A1'2 fixed 2B1C1D1 moves right to A1'3.Now, projected image A1'3B1C1D1 drift angle A1'3 and screen picture
Drift angle E1 horizontal range still above predetermined threshold value.Because drift angle A1'3 is on drift angle E1 right side, therefore horizontal range value
Be changed on the occasion of.
Due to, drift angle E1 and drift angle A1'2 to the left horizontal range and the horizontal of the drift angle A1'3 on the right side of it away from
From both greater than predetermined threshold value, it is believed that default step-length is long.Therefore, default step-length is turned into the half of original step-length, and
Original image A'3BCD drift angle A'3 is moved to the left the distance of a new step-length to A'4, then projection imaging A1'3B1C1D1
Fixed drift angle A1'3 is moved to the left A1'4.Now, projected image A1'4B1C1D1 drift angle A1'4 and the drift angle of screen picture
E1 horizontal range no longer corrects original image A'4BCD drift angle A'4 horizontal range still less than or equal to predetermined threshold value.
It is that the schematic diagram of vertical correction is carried out to the drift angle coordinate of original image in the embodiment of the present application shown in reference picture 6.
In figure, vertical correction is carried out to the summit A'4 of the original image A'4BCD Jing Guo level correction.First, A'4 points are moved down
The distance of one step-length to A " 41, B, C, D point remains stationary as.Specifically can be by carrying out figure to the pixel of each row of original image
The correction of vertical angles coordinate is realized as the method for scaling processing.
It is to being projected into after the drift angle coordinate progress vertical correction of original image in the embodiment of the present application shown in reference picture 7
The schematic diagram of picture.When in original image A'4BCD, when summit A'4 is corrected to A " 41, projected image A1'4B1C1D1 drift angle A1'
4 are moved downward to A1 " 41.Now, projected image A1 " 41B1C1D1 drift angle A1 " 41 is vertical with the drift angle E1's of screen picture
Distance is so more than predetermined threshold value.
Original image A " 41BCD drift angle A " 41 is moved down into the distance of a step-length to A " 42, then projection imaging A1 "
41B1C1D1 drift angle A1 " 41 is moved downward to A1 " 42.Now, projected image A1 " 42B1C1D1 drift angle A1 " 42 and screen
The drift angle E1 of image vertical range is less than or equal to predetermined threshold value.No longer correct original image A " 42BCD drift angle A's " 42
Vertical range.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of action group
Close, but those skilled in the art should know, the embodiment of the present application is not limited by described sequence of movement, because according to
According to the embodiment of the present application, some steps can use other orders or carry out simultaneously.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, and involved action not necessarily the application is implemented
Necessary to example.
Reference picture 8, a kind of structured flowchart of the automatic correction device embodiment of projection imaging of the application is shown, specifically
Following module can be included：
Image collection module 21, for obtaining designated area image, the specified area by preset image capture device
Area image includes：The projection imaging of original image and screen picture；
Coordinate determining module 22, each drift angle coordinate of the projection imaging for determining the original image, and, it is described
Each drift angle coordinate of screen picture；
Distance calculation module 23, each drift angle and the screen picture of the projection imaging for calculating the original image
The horizontal range and vertical range of corresponding drift angle；
Judge module 24, for judge the original image projection imaging each drift angle in whether have and the screen
The horizontal range of corresponding drift angle in image, and/or, vertical range is more than the observing angle of default distance threshold；
Correction module 25, if for there is observing angle in each drift angle of the projection imaging of the original image, press
Default step-length corrects drift angle corresponding with the observing angle of the projection imaging of the original image in default original image
Abscissa, and/or, ordinate.
As a kind of preferred exemplary of the embodiment of the present application, the coordinate determining module 22 may further include：
Haas matrix computations submodule, for calculating the Haas matrix of each point in the designated area image；
Calculation of characteristic parameters submodule, for calculating the Haas determinant of a matrix value and mark of each point；
Angle point intensity level calculating sub module, for using the Haas determinant of a matrix value and mark, calculate each point
Angle point intensity level；
Drift angle coordinate determination sub-module, when the angle point intensity level for being put when certain is more than or equal to predetermined threshold value, by the point
Coordinate as apex coordinate.
As a kind of preferred exemplary of the embodiment of the present application, the correction module 25 may further include：
First correction module, if in the observing angle of the projection imaging of the original image and the screen picture
There was only horizontal range between corresponding drift angle, or, vertical range is more than default distance threshold, then is corrected by default step-length pre-
If original image in drift angle corresponding with the observing angle of the projection imaging of the original image abscissa, or, ordinate.
As a kind of preferred exemplary of the embodiment of the present application, the correction module 25 can further include：
Second correction module, if observing angle and the screen picture pair for the projection imaging of the original image
Horizontal range between the drift angle answered, and, vertically away from all from more than default distance threshold, then being corrected by default step-length default
Original image in corresponding drift angle abscissa, or, ordinate obtains a correction chart picture；
3rd correction module, for correcting the ordinate of corresponding drift angle in a correction chart picture by default step-length,
Or, abscissa.
As a kind of preferred exemplary of the embodiment of the present application, described device can also include：
Module is filled, for image and the misaligned area filling of original image for obtaining original image after corrected
For particular color.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part illustrates referring to the part of embodiment of the method.
Reference picture 9, shows a kind of structured flowchart of laser television embodiment of the application, and the laser television can wrap
Include：Projector 31, screen 32, automatic correction device 33；The automatic correction device 33 can specifically include following module：
Image collection module 3301, it is described to specify for obtaining designated area image by preset image capture device
Area image includes：The projection imaging of original image and screen picture；
Coordinate determining module 3302, each drift angle coordinate of the projection imaging for determining the original image, and, institute
State each drift angle coordinate of screen picture；
Distance calculation module 3303, each drift angle and the screen map of the projection imaging for calculating the original image
The horizontal range and vertical range of drift angle as corresponding to；
Judge module 3304, for judge the original image projection imaging each drift angle in whether have and the screen
The horizontal range of corresponding drift angle in curtain image, and/or, vertical range is more than the observing angle of default distance threshold；
Correction module 3305, if for there is observing angle in each drift angle of the projection imaging of the original image,
Drift angle corresponding with the observing angle of the projection imaging of the original image in default original image is corrected as default step-length
Abscissa, and/or, ordinate.
As a kind of preferred exemplary of the embodiment of the present application, the coordinate determining module 3302 may further include：
Haas matrix computations submodule, for calculating the Haas matrix of each point in the designated area image；
Calculation of characteristic parameters submodule, for calculating the Haas determinant of a matrix value and mark of each point；
Angle point intensity level calculating sub module, for using the Haas determinant of a matrix value and mark, calculate each point
Angle point intensity level；
Drift angle coordinate determination sub-module, when the angle point intensity level for being put when certain is more than or equal to predetermined threshold value, by the point
Coordinate as apex coordinate.
As a kind of preferred exemplary of the embodiment of the present application, the correction module 3305 may further include：
First correction module, if in the observing angle of the projection imaging of the original image and the screen picture
There was only horizontal range between corresponding drift angle, or, vertical range is more than default distance threshold, then is corrected by default step-length pre-
If original image in drift angle corresponding with the observing angle of the projection imaging of the original image abscissa, or, ordinate.
As a kind of preferred exemplary of the embodiment of the present application, the correction module 3305 can further include：
Second correction module, if observing angle and the screen picture pair for the projection imaging of the original image
Horizontal range between the drift angle answered, and, vertically away from all from more than default distance threshold, then being corrected by default step-length default
Original image in corresponding drift angle abscissa, or, ordinate obtains a correction chart picture；
3rd correction module, for correcting the ordinate of corresponding drift angle in a correction chart picture by default step-length,
Or, abscissa.
As a kind of preferred exemplary of the embodiment of the present application, described device can also include：
Module is filled, for image and the misaligned area filling of original image for obtaining original image after corrected
For particular color.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present application can be provided as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present application can use complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present application can use one or more wherein include computer can
With in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present application is with reference to according to the method for the embodiment of the present application, terminal device (system) and computer program
The flow chart and/or block diagram of product describes.It should be understood that can be by computer program instructions implementation process figure and/or block diagram
In each flow and/or square frame and the flow in flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions are set to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to produce a machine so that is held by the processor of computer or other programmable data processing terminal equipments
Capable instruction is produced for realizing in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames
The device for the function of specifying.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing terminal equipments
In the computer-readable memory to work in a specific way so that the instruction being stored in the computer-readable memory produces bag
The manufacture of command device is included, the command device is realized in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps is performed on computer or other programmable terminal equipments to produce computer implemented processing, so that
The instruction performed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or specified in one square frame of block diagram or multiple square frames function the step of.
Although having been described for the preferred embodiment of the embodiment of the present application, those skilled in the art once know base
This creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to
Including preferred embodiment and fall into having altered and changing for the embodiment of the present application scope.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Auto-correction method to a kind of projection imaging provided herein, a kind of automatic correction of projection imaging above
Device and a kind of laser television, are described in detail, used herein principle and embodiment party of the specific case to the application
Formula is set forth, and the explanation of above example is only intended to help and understands the present processes and its core concept；It is meanwhile right
In those of ordinary skill in the art, according to the thought of the application, change is had in specific embodiments and applications
Part, in summary, this specification content should not be construed as the limitation to the application.
Claims (11)
- A kind of 1. auto-correction method of projection imaging, it is characterised in that including：Designated area image is obtained by preset image capture device, the designated area image includes：The throwing of original image Shadow is imaged and screen picture；Each drift angle coordinate of the projection imaging of the original image is determined, and, each drift angle coordinate of the screen picture；Calculate each drift angle drift angle corresponding with the screen picture of the projection imaging of the original image horizontal range and Vertical range；Judge whether there is drift angle corresponding with the screen picture in each drift angle of the projection imaging of the original image Horizontal range, and/or, vertical range is more than the observing angle of default distance threshold；If so, then correct the observing angle in default original image with the projection imaging of the original image by default step-length The abscissa of corresponding drift angle, and/or, ordinate.
- 2. according to the method for claim 1, it is characterised in that the projection imaging for determining the original image it is each Drift angle coordinate, and, include the step of each drift angle coordinate of the screen picture：Calculate the Haas matrix of each point of the designated area image；Calculate the Haas determinant of a matrix value and mark；Using the Haas determinant of a matrix value and mark, the angle point intensity level of each point is calculated；When the angle point intensity level of point is more than or equal to predetermined threshold value, using the coordinate of the point as apex coordinate.
- 3. method according to claim 1 or 2, it is characterised in that described then default original by the correction of default step-length The abscissa of drift angle corresponding with the observing angle of the projection imaging of the original image in image, and/or, the step of ordinate Including：It is if only horizontal between the observing angle of the projection imaging of original image drift angle corresponding with the screen picture Distance, or, vertical range are more than default distance threshold, then by default step-length correct in default original image with the original The abscissa of drift angle corresponding to the observing angle of the projection imaging of beginning image, or, ordinate.
- 4. according to the method for claim 3, it is characterised in that described then to correct default original image by default step-length In drift angle corresponding with the observing angle of the projection imaging of the original image abscissa, and/or, also wrap the step of ordinate Include：If the horizontal range between the observing angle of the projection imaging of original image drift angle corresponding with the screen picture, With vertically away from all from more than default distance threshold, then correcting corresponding drift angle in default original image by default step-length Abscissa, or, ordinate obtains a correction chart picture；The ordinate of corresponding drift angle in a correction chart picture, or, abscissa are corrected by default step-length.
- 5. according to the method for claim 1, it is characterised in that also include：The image that original image is obtained after corrected and the misaligned area filling of original image are particular color.
- A kind of 6. automatic correction device of projection imaging, it is characterised in that including：Image collection module, for obtaining designated area image, the designated area image by preset image capture device Including：The projection imaging of original image and screen picture；Coordinate determining module, each drift angle coordinate of the projection imaging for determining the original image, and, the screen map Each drift angle coordinate of picture；Distance calculation module, it is corresponding with the screen picture for calculating each drift angle of projection imaging of the original image The horizontal range and vertical range of drift angle；Judge module, for judge the original image projection imaging each drift angle in whether have with the screen picture The horizontal range of corresponding drift angle, and/or, vertical range is more than the observing angle of default distance threshold；Correction module, if for there is observing angle in each drift angle of the projection imaging of the original image, by default Step-length corrects the abscissa of drift angle corresponding with the observing angle of the projection imaging of the original image in default original image, And/or ordinate.
- 7. device according to claim 6, it is characterised in that the coordinate determining module further comprises：Haas matrix computations submodule, for calculating the Haas matrix of each point in the designated area image；Calculation of characteristic parameters submodule, for calculating the Haas determinant of a matrix value and mark of each point；Angle point intensity level calculating sub module, for using the Haas determinant of a matrix value and mark, calculate the angle point of each point Intensity level；Drift angle coordinate determination sub-module, when the angle point intensity level for being put when certain is more than or equal to predetermined threshold value, by the seat of the point It is denoted as apex coordinate.
- 8. the device according to claim 6 or 7, it is characterised in that the correction module further comprises：First correction module, if the observing angle for the projection imaging of the original image is corresponding with the screen picture Drift angle between only horizontal range, or, vertical range is more than default distance threshold, then it is default by the correction of default step-length The abscissa of drift angle corresponding with the observing angle of the projection imaging of the original image in original image, or, ordinate.
- 9. device according to claim 8, it is characterised in that the correction module still further comprises：Second correction module, if the observing angle for the projection imaging of the original image is corresponding with the screen picture Horizontal range between drift angle, and, vertically away from all from more than default distance threshold, then correcting default original by default step-length The abscissa of corresponding drift angle in beginning image, or, ordinate, obtain a correction chart picture；3rd correction module, for correcting the ordinate of corresponding drift angle in a correction chart picture by default step-length, or, it is horizontal Coordinate.
- 10. device according to claim 6, it is characterised in that also include：Module is filled, image and the misaligned area filling of original image for original image to be obtained after corrected are spy Determine color.
- A kind of 11. laser television, it is characterised in that including：Projector, screen, automatic correction device；The automatic correction device Including：Image collection module, for obtaining designated area image, the designated area image by preset image capture device Including：The projection imaging of original image and screen picture；Coordinate determining module, each drift angle coordinate of the projection imaging for determining the original image, and, the screen map Each drift angle coordinate of picture；Distance calculation module, it is corresponding with the screen picture for calculating each drift angle of projection imaging of the original image The horizontal range and vertical range of drift angle；Judge module, for judge the original image projection imaging each drift angle in whether have with the screen picture The horizontal range of corresponding drift angle, and/or, vertical range is more than the observing angle of default distance threshold；Correction module, if for there is observing angle in each drift angle of the projection imaging of the original image, by default Step-length corrects the abscissa of drift angle corresponding with the observing angle of the projection imaging of the original image in default original image, And/or ordinate.
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