CN114119380B - Geometric deformation measurement method for collimation virtual image vision system - Google Patents
Geometric deformation measurement method for collimation virtual image vision system Download PDFInfo
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- 238000000691 measurement method Methods 0.000 title claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 40
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 229920002799 BoPET Polymers 0.000 claims abstract description 20
- 239000005041 Mylar™ Substances 0.000 claims abstract description 20
- 230000000007 visual effect Effects 0.000 claims abstract description 19
- 238000012937 correction Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
Abstract
The invention discloses a geometric deformation measuring method of a collimation virtual image visual system, which comprises the following measuring steps: s1, establishing a standard dot matrix of 5 degrees multiplied by 5 degrees, erecting theodolites at left and right eye points, and generating the standard dot matrix of 5 degrees multiplied by 5 degrees according to designed eye points; s2, establishing a virtual image lattice, and generating virtual image lattices at intervals of 5 degrees by taking the original point of the standard lattice as a reference in a visual system; s3, collecting virtual image dot matrix data; and S4, processing the measurement data. According to the method, the normalized geometric deformation measurement method of the collimation virtual image vision system is designed, the contrast data can be formed quickly and efficiently, the installation and debugging of the Mylar film of the simulator and the fusion and correction of the projector are facilitated, the method for correcting and debugging the virtual image display system which is quick and efficient and has the standardized characteristics is designed, the popularization is easy, and the display quality of the collimation virtual image can be effectively improved.
Description
Technical Field
The invention relates to the technical field related to collimation virtual image vision, in particular to a geometric deformation measuring method of a collimation virtual image vision system.
Background
In the flight simulator, image fusion splicing can be carried out through a plurality of projectors, the horizontal view field can reach 180 degrees, the vertical view field can reach 40 degrees, the projectors are projected onto a rear projection screen and then transmitted to a mylar film, and finally light reflected by the mylar film enters human eyes to form infinite virtual image display, which is generally called as a collimation virtual image technology. However, in the practical application process, the layout of the mylar film cannot reach an ideal curved surface, and the image distortion phenomenon often occurs in the flight simulator due to the picture distortion caused by the splicing and fusion of multiple projection images.
In the prior art, the measurement of the distortion of the collimated virtual image generally meets the tolerance range that the uniform angular spacing of a 5-degree square does not exceed +/-1 degrees and the angular spacing of adjacent squares does not exceed +/-1.5 degrees in the distortion requirement in the AC-60 of the civil aviation administration according to the practical experience of an engineer, the requirement is too wide, the measurement method too depends on the practical experience of the engineer, the adjustment effect difference is large, and the engineering experience cannot form the written requirement with strict specification, so the measurement method cannot be unified, and the measurement technology cannot be inherited. In view of this, the present application provides a method and a technique for measuring geometric deformation of a collimated virtual image viewing system.
Disclosure of Invention
The invention provides a geometric deformation measurement method of a collimation virtual image visual system, which is applied to the stages of installation and debugging of a Mylar film of a simulator and fusion correction of a projector, and aims to solve the problem that the existing national standard measurement method is incomplete, adopts theoretical analysis and engineering practice, generates a standard dot matrix according to design eyepoints, acquires virtual image dot matrix data by projecting the virtual image dot matrix, and provides data support for quickly and efficiently calibrating the virtual image dot matrix and improving the distortion of a virtual image picture by analyzing and comparing the virtual image dot matrix with the standard dot matrix.
In order to achieve the purpose, the invention adopts the following technical scheme:
a geometric deformation measurement method for a collimation virtual image visual system comprises the following measurement steps:
s1, establishing a standard dot matrix of 5 degrees multiplied by 5 degrees, erecting theodolites at left and right eye points, and generating the standard dot matrix of 5 degrees multiplied by 5 degrees according to designed eye points;
s2, establishing a virtual image lattice, and generating virtual image lattices at intervals of 5 degrees by taking the original point of the standard lattice as a reference in a visual system;
s3, collecting virtual image dot matrix data, erecting theodolites at left and right design eye point positions, collecting horizontal and pitch angle data of each point in the virtual image dot matrix, and importing the data into a computer for storage;
and S4, processing the measurement data, analyzing and comparing the measurement data acquired by the theodolite, and guiding geometric deformation correction.
Preferably, in step S1, a horizontal 0 ° line of the standard dot matrix of 5 ° × 5 ° is a horizontal-30 ° line passing through an intersection line between the design eyepoint and mylar on the left and right center slopes of the cockpit, and a horizontal +30 ° line is a horizontal intersection line between the center slope and mylar rotated horizontally to the right by 30 ° around a vertical line where the design eyepoint is located, and a horizontal-30 ° line is a horizontal-30 ° line rotated horizontally to the left by 30 °.
Preferably, in step S1, the 0 ° line of the 5 ° × 5 ° standard dot matrix is an intersection line of the horizontal section passing through the design eye point and the mylar, the 10 ° line of the horizontal line rotated upward around the design eye point is a +10 ° line of the horizontal line, and the 10 ° line of the horizontal line rotated downward is a-10 ° line of the horizontal line rotated downward.
Preferably, in step S3, when data is collected, the theodolite laser is turned on and focused to align with a geometric grid point of a view to be measured, and then positioning is performed, when data is stored, the acquisition button is clicked to acquire measured original data, azimuth and pitch data is displayed in the interface, and when it is determined that the data is correct measurement data, the confirmation button is clicked, and the data is stored locally.
Preferably, in step S4, after the theodolite is used to measure all virtual image lattices one by one at the long eye point, visual geometry measurement data is generated, and by comprehensively comparing results obtained by measurement at different positions, the geometric system of the visual system can be evaluated and a basis for geometric correction of the visual is provided.
Preferably, in step S4, the theodolite may be further used to measure the view system geometry at the secondary driving eyepoint position and the design eyepoint position to obtain the view geometry measurement data.
The invention has the following beneficial effects:
1. by designing a standardized geometric deformation measurement method of the collimation virtual image vision system, contrast data can be formed quickly and efficiently, and the installation and debugging of a Mylar film of a simulator and the fusion correction of a projector are facilitated;
2. by designing the virtual image display system correcting and debugging method which is rapid and efficient and has standardized characteristics, the method is easy to popularize, and the display quality of the collimation virtual image can be effectively improved.
Drawings
FIG. 1 is a schematic flow chart of a measurement method for geometric deformation of a collimated virtual image viewing system according to the present invention;
FIG. 2 is a schematic diagram of collimated virtual image imaging in the present invention;
FIG. 3 is a schematic diagram of the collimation virtual image imaging correction in the present invention;
FIG. 4 is a top view of a simulator illustrating a standard lattice according to the present invention;
FIG. 5 is a left side view of the simulator of the standard lattice schematic of the present invention;
FIG. 6 is a graph of a standard lattice plot in accordance with the present invention;
FIG. 7 is a schematic view of a projection area in the present invention;
FIG. 8 is a schematic diagram of a standard dot matrix data interface acquired by the theodolite in the present invention;
FIG. 9 is a schematic view of a virtual image dot matrix data interface acquired by the theodolite according to the present invention;
fig. 10 is a schematic diagram of comparing and analyzing geometric data of a machine-length eyepoint measurement view in the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A geometric deformation measurement method for a collimation virtual image visual system comprises the following measurement steps:
s1, establishing a standard dot matrix of 5 degrees multiplied by 5 degrees, erecting theodolites on left and right eye points, and generating the standard dot matrix of 5 degrees multiplied by 5 degrees according to designed eye points; in the step S1, a horizontal 0-degree line of a standard dot matrix of 5 degrees multiplied by 5 degrees is a line which takes a left and a right central slope surfaces of the cockpit as a line passing through a design eye point and a mylar film, the intersection line of the central slope surface, which horizontally rotates by 30 degrees to the right around a vertical line where the design eye point is located, and the mylar film is a horizontal + 30-degree line, and the intersection line of the central slope surface, which horizontally rotates by 30 degrees to the left, is a horizontal-30-degree line.
In step S1, the 0 ° pitch line of the 5 ° × 5 ° standard dot matrix is the intersection line of the horizontal section passing through the designed eyepoint and the mylar, the 10 ° pitch-plus-10 ° pitch line is the intersection line rotated upward around the horizontal line where the designed eyepoint is located, and the 10 ° pitch-plus-10 ° pitch line is the intersection line rotated downward. See in particular fig. 4 (simulator top view) and fig. 5 (simulator left view).
Specifically, the design of the collimation virtual image technology is based on an infinite imaging display principle, namely the collimation virtual image technology is positioned at a design eye point position to observe an imaging picture on a Mylar film and is consistent with the observation of an actual scene, taking a civil aviation passenger plane flight simulator as an example, the design eye point is positioned on a left central section and a right central section of a cockpit, the central section is assumed to be intersected with the Mylar film at 0 degree, the intersection line of the central section which rotates to the right by 30 degrees is a line of +30 degrees, and the intersection line of the central section which rotates to the left by 30 degrees is a line of-30 degrees. When the observer observes a virtual image a at the 0 ° line, a virtual image B at the +30 ° line, and a virtual image C at the-30 ° line at the design eyepoint, as shown in fig. 2 (note: the distance between the virtual image plane and mylar is much longer than the distance between the left/right/design eyepoint and mylar, and is used for illustrative reference only).
At this time, when the observer is located at the left/right eyepoint position, the three virtual images a, B, and C are also respectively located at the line positions of 0 °, +30 °, -30 °, which is consistent with the phenomenon of eye point re-design observation, as shown in fig. 3. Therefore, a standard dot matrix of 5 degrees multiplied by 5 degrees in the horizontal direction and the vertical direction can be generated through a program, the standard dot matrix is respectively positioned at a left eye point, a right eye point and a design eye point, the angle parameter of the virtual image dot matrix is measured, and the contrast distortion degree and the correction optimization are analyzed.
S2, establishing a virtual image lattice, and generating virtual image lattices at intervals of 5 degrees by taking the original point of the standard lattice as a reference in a visual system; in practical application, for example, 3 projections are used, the horizontal viewing angle is 200 °, the pitching viewing angle is 40 °, each projection has a horizontal viewing angle of 70 °, and the overlapping region of the adjacent projections is 5 °, as shown in fig. 7.
S3, virtual image dot matrix data are collected, a theodolite is erected at the left and right designed eye point positions, horizontal and pitch angle data of each point in the virtual image dot matrix are collected, and the data are imported into a computer to be stored; in step S3, when data are collected, firstly, the theodolite laser is turned on and focused to align to a visual geometric grid point to be measured, then positioning is carried out, when the data are stored, an acquisition button is clicked to acquire measured original data, azimuth and pitching data are displayed in an interface, and when the data are confirmed to be correct measurement data, a confirmation button is clicked and stored to the local.
The importing of the geometric test data of the vision system into the computer can be realized by the following steps: one end of a serial port data line is connected with the theodolite, the other end of the serial port data line is connected with the computer, and the computer is connected with the theodolite to carry out data transmission.
And S4, processing the measurement data, analyzing and comparing the measurement data acquired by the theodolite, and guiding geometric deformation correction. After the theodolite is adopted to measure all virtual image dot matrixes one by one at the long eye point, visual geometric measurement data is generated, and the geometric evaluation of a visual system can be performed and a basis is provided for visual geometric correction by comprehensively comparing results obtained by measuring at different positions. Furthermore, the theodolite can be used for measuring the geometry of the visual system at the auxiliary driving eyepoint position and the design eyepoint position so as to obtain the visual geometry measurement data.
Specifically, the generated view geometry measurement data is shown in fig. 8 to 10, and in fig. 8 and 9, "-x" is a standard dot matrix, "-o" is virtual image dot matrix data, and fig. 10 is a part of dot matrix specific measurement values and brief comparison data.
In fig. 10, the second row of the first column is the standard dot matrix azimuth and the pitch data, the fourth row of the third column is the virtual image dot matrix azimuth and the pitch data, "a.g" is the square root of the difference between the virtual image dot and the standard dot matrix azimuth pitch data, "5Horz", "10Horz" are the difference degrees of 5 ° and 10 ° in the horizontal azimuth of the virtual image dot matrix, and "5Vert" and "10Vert" are the difference degrees of 5 ° and 10 ° in the pitch of the virtual image dot matrix.
In conclusion, compared with the traditional method for measuring and correcting by relying on the experience of engineers, the method for measuring and correcting the geometric deformation of the collimation virtual image vision system can obviously form contrast data quickly and efficiently, and facilitates the installation and debugging of the Mylar film of the simulator and the fusion and correction of the projector. In addition, the hardware facilities used in the invention are convenient to obtain and suitable for installation, debugging and the like of the collimation virtual image. The measurement method comprises but is not limited to correction and debugging of a virtual image display system of the cockpit flight simulator, is fast and efficient, has standardized characteristics, is easy to popularize, and can effectively improve the display quality of the collimated virtual image.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (2)
1. A geometric deformation measurement method of a collimation virtual image visual system is characterized by comprising the following measurement steps:
s1, establishing a standard dot matrix of 5 degrees multiplied by 5 degrees, erecting theodolites at left and right eye points, and generating the standard dot matrix of 5 degrees multiplied by 5 degrees according to designed eye points;
s2, establishing a virtual image lattice, and generating virtual image lattices at intervals of 5 degrees by taking eye points designed by a standard lattice as a reference in a visual system;
s3, virtual image dot matrix data are collected, a theodolite is erected at the left and right designed eye point positions, horizontal and pitch angle data of each point in the virtual image dot matrix are collected, and the data are imported into a computer to be stored;
s4, processing the measurement data, analyzing and comparing the measurement data acquired by the theodolite, and guiding geometric deformation correction;
in the step S1, a horizontal 0-degree line of a standard dot matrix of 5 degrees multiplied by 5 degrees is a horizontal-30-degree line which is formed by horizontally rotating the central slope surface by 30 degrees around a vertical line where a designed eye point is located and passing through an intersection line of the designed eye point and the mylar, and the intersection line of the central slope surface horizontally rotating by 30 degrees to the right and the mylar is a horizontal + 30-degree line;
in the step S1, a 0-degree line of the 5 ° × 5 ° standard dot matrix is an intersection line of the horizontal section passing through the designed eyepoint and the mylar, an intersection line rotated 10 ° upward around the horizontal line of the designed eyepoint is a + 10-degree line of the elevation, and an intersection line rotated 10 ° downward is a-10-degree line of the elevation.
2. The method for measuring geometric deformation of a collimated virtual image vision system according to claim 1, wherein in step S3, when data is collected, a theodolite laser is turned on first and focused to align with a geometric grid point of a view to be measured, positioning is performed, when the data is stored, the acquisition button is clicked to acquire measured original data, azimuth and pitch data are displayed on an interface, and when the data is determined to be correct, the confirmation button is clicked and stored locally.
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| CN101572787B (en) * | 2009-01-04 | 2010-08-04 | 四川川大智胜软件股份有限公司 | Computer vision precision measurement based multi-projection visual automatic geometric correction and splicing method |
| MX2013006722A (en) * | 2010-12-16 | 2014-01-31 | Lockheed Corp | Collimating display with pixel lenses. |
| DE102014013320B4 (en) * | 2014-09-15 | 2022-02-10 | Rolf Hainich | Apparatus and method for near-eye display of computer-generated images |
| US20180160087A1 (en) * | 2016-12-01 | 2018-06-07 | Panasonic Automotive Systems Company Of America, Division Of Panasonic Corporation Of North America | Hud image optimization through software control of displayed graphics |
| CN107105209B (en) * | 2017-05-22 | 2019-09-03 | 长春华懋科技有限公司 | Projected image geometric distortion automatic correction system and its bearing calibration |
| CN109688392B (en) * | 2018-12-26 | 2021-11-02 | 联创汽车电子有限公司 | AR-HUD optical projection system, mapping relation calibration method and distortion correction method |
| US10996481B1 (en) * | 2019-11-19 | 2021-05-04 | GM Global Technology Operations LLC | Head-up display calibration |
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| CN1716313A (en) * | 2004-07-02 | 2006-01-04 | 四川华控图形科技有限公司 | Correcting method for curve projection geometry of artificial site |
| CN101344707A (en) * | 2008-01-09 | 2009-01-14 | 上海海事大学 | Non-linear geometry correction and edge amalgamation method of automatic multi-projection apparatus |
| CN106526880A (en) * | 2017-01-12 | 2017-03-22 | 北京航宇荣康科技股份有限公司 | Off-axis virtual image plus stereoscopic display system and method |
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