CN110864649A - Method for determining compensation value and determining flatness of optical module - Google Patents
Method for determining compensation value and determining flatness of optical module Download PDFInfo
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- CN110864649A CN110864649A CN201911168368.8A CN201911168368A CN110864649A CN 110864649 A CN110864649 A CN 110864649A CN 201911168368 A CN201911168368 A CN 201911168368A CN 110864649 A CN110864649 A CN 110864649A
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Abstract
The invention discloses a method for determining a compensation value. The method comprises the following steps: providing an optical module to be tested and setting a calibration plate; enabling the optical module to be measured positioned in the placement area to be arranged over against the central calibration point, enabling the optical module to be measured to emit light rays, enabling the light rays to be emitted to the central calibration point to obtain a distance value between the central calibration point and the optical module to be measured, and enabling the distance value between the central calibration point and the optical module to be measured to serve as a reference value; enabling the light rays to be emitted to a plurality of edge calibration points to obtain a plurality of actual distance values between the edge calibration points and the optical module to be tested; taking the center index point as a coordinate origin, and performing surface fitting on a plurality of edge index points and a plurality of actual distance values according to a reference value to obtain a fitting equation; the fitting equation is configured to determine compensation values for a plurality of the edge calibration points. The invention adopts a fitting method to determine the compensation value, and improves the accuracy of the flatness in the optical module.
Description
Technical Field
The invention relates to the field of optics, in particular to a method for determining a compensation value and determining the flatness of an optical module.
Background
The flatness of the optical module is an inherent characteristic in the optical module, and is usually verified by using a flatness algorithm stored in the optical module.
In the prior art, the determination of the compensation value in the flatness algorithm is generally performed by adopting an offset compensation method; obtaining different distance values according to the distances from the optical module to different calibration points, and further obtaining a distance difference value; the distance difference is a compensation value, but the method can only obtain the compensation values of some specific calibration points, so that the image obtained by the optical module is not accurate and the flatness of the optical module is not accurate in the process of verifying the flatness of the optical module.
To solve the above technical problem, the present invention provides a method for determining a compensation value and verifying the flatness of an optical module.
Disclosure of Invention
It is an object of the present invention to provide a method for determining compensation values and determining the flatness of an optical module.
According to a first aspect of the present invention, there is provided a method of determining a compensation value, the method comprising the steps of:
providing a placement area configured for placing an optical module under test;
setting a calibration plate, wherein the calibration plate is provided with a calibration point, the calibration point comprises a central calibration point and a plurality of edge calibration points, and the central calibration point is positioned at the geometric center of the calibration plate;
enabling the optical module to be measured positioned in the placement area to be arranged over against the central calibration point, enabling the optical module to be measured to emit light rays, enabling the light rays to be emitted to the central calibration point to obtain a distance value between the central calibration point and the optical module to be measured, and enabling the distance value to be used as a reference value;
enabling the light rays to be emitted to the edge calibration points to obtain a plurality of actual distance values between the edge calibration points and the optical module to be tested;
taking the center index point as a coordinate origin, and performing surface fitting on a plurality of edge index points and a plurality of actual distance values according to a reference value to obtain a fitting equation;
the fitting equation is configured to determine compensation values for a plurality of the edge calibration points.
Optionally, the surface of the calibration plate is planar.
Optionally, a plurality of said edge index points are located around said central index point.
Optionally, the fitting equation is a surface equation.
Optionally, the parameters in the fitted equation are determined according to a least squares method.
According to another aspect of the present invention, there is provided a method for determining the flatness of an optical module using the method described above, the method comprising the steps of:
arranging the fitting equation in a processor of an optical module;
arranging the optical module with the fitting equation arranged opposite to the shot object;
the subject has the center index point and a plurality of the edge index points; making difference between actual distance values corresponding to the edge calibration points and reference values to obtain a plurality of compensation values of the edge calibration points;
emitting light rays emitted by the optical module with the fitting equation to the shot object, and compensating the first image obtained by the optical module according to the plurality of compensation values to obtain a second image;
the second image is configured to mark a flatness of the optical module with the fitting equation set.
Optionally, the second image is configured as an image actually displayed by the optical module, and the second image is a plane.
Optionally, the first image is stretched according to a plurality of compensation values to obtain a second image.
Optionally, coordinate values corresponding to the central calibration point and the plurality of edge calibration points are known variables in the fitting equation.
Optionally, a flatness algorithm is provided in the processor of the optical module, and the fitting equation is provided in the flatness algorithm.
The invention has the beneficial effects that: the invention provides a method for determining a compensation value and determining the flatness of an optical module. The invention ensures that the compensation values at different calibration points are more accurate, and simultaneously improves the precision of the flatness in the optical module.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of a method for determining a compensation value in the prior art.
Fig. 2 is a schematic diagram of a method of determining a compensation value according to the present invention.
FIG. 3 is a schematic diagram of a first image obtained by the optical module of the present invention.
FIG. 4 is a schematic diagram of a second image displayed after compensation by the optical module according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to an embodiment of the present invention, as shown in fig. 2, there is provided a method of determining a compensation value, the method including the steps of:
providing a placement area configured for placement of an optical module under test 102;
setting a calibration plate 101, wherein the calibration plate 101 is provided with calibration points, the calibration points comprise a central calibration point 0 and a plurality of edge calibration points, and the central calibration point 0 is positioned at the geometric center of the calibration plate;
enabling the optical module to be tested 102 located in the placement area to be arranged over against the central calibration point 0, enabling the optical module to be tested 102 to emit light, enabling the light to be emitted to the central calibration point 0 to obtain a distance value between the central calibration point 0 and the optical module to be tested 102, and enabling the distance value to be used as a reference value;
enabling the light rays to be emitted to the edge calibration points to obtain a plurality of actual distance values between the edge calibration points and the optical module to be tested;
taking the center index point 0 as a coordinate origin, and performing surface fitting on a plurality of edge index points and a plurality of actual distance values according to a reference value to obtain a fitting equation;
the fitting equation is configured to determine compensation values for a plurality of the edge calibration points.
In the prior art, offset compensation is usually used to determine the compensation value at the edge calibration point.
Specifically, as shown in fig. 1, a schematic diagram of determining a compensation value at an edge calibration point in the prior art is shown, wherein a horizontal axis represents coordinate values of calibration points on a calibration board, and a vertical axis represents distance values corresponding to the calibration points.
Wherein, the 0 point represents the central calibration point, a represents the distance value corresponding to the central calibration point at the 0 point; the 1 point and the 2 point respectively represent edge calibration points, b represents a distance value corresponding to the edge calibration point at the 1 point, and c represents a distance value corresponding to the edge calibration point at the 2 point. In the prior art, only the compensation value at a specific edge calibration point can be obtained.
Specifically, the distance value measured between the center calibration point and the optical module to be measured is 1m (i.e., a is 1m), the distance value measured between the edge calibration point at the point 1 and the optical module to be measured is 1.2m (i.e., b is 1.2m), and then the compensation value at the edge calibration point at the point 1 is 0.2; at this time, the compensation values of the calibration points on the circle formed by taking the 0 point as the round point and taking the distance length between the 1 point and the 0 point as the radius are all 0.2;
the distance value measured by the edge calibration point at the point 2 and the optical module to be measured is 1.4m (namely c is 1.4m), and the compensation value of the edge calibration point at the point 2 is 0.4; at this time, the compensation values of the calibration points on the circle formed by taking the 0 point as the round point and taking the distance length between the 2 point and the 0 point as the radius are all 0.4; wherein the distance length of the 2 points from the 0 point is 2 times of the distance length of the 1 point from the 0 point.
And analogizing in sequence, the distance value between the edge calibration point at the 3 points on the horizontal axis and the optical module to be measured is determined to be 1.6m, and the compensation value of the edge calibration point at the 3 points is determined to be 0.6. Wherein the distance length from the 0 point to the 3 points is 3 times that from the 0 point to the 1 point.
However, in the prior art, the compensation values of the calibration points are obtained only by measuring the distance values of a certain number of calibration points, and the compensation values of other calibration points are obtained by analogy; the compensation values obtained by analogy are not exact; in addition, in the prior art, the compensation values at other edge calibration points between the center calibration point of the 0 point and the edge calibration point of the 1 point cannot be determined, so that in the prior art, only the compensation value at the specific edge calibration point can be obtained, and the compensation value at the specific edge calibration point is in an arithmetic progression (actually, the compensation value obtained in this way is inaccurate); when the image obtained by the optical module to be measured is compensated, the image at the specific edge calibration point can only be compensated, so that the flatness of the finally obtained optical module is not accurate.
The specific edge index point is defined as the edge index point if the center index point is taken as the center point, the distance between the edge index point closest to the center index point and the center index point is taken as the reference value, and the distance between two adjacent other edge index points is equal to the reference value. In fig. 1, the edge index point at point 1 and the edge index point at point 2 are specific edge index points, and the edge index point between the center index point at point 0 and the edge index point at point 1 is an unspecific edge index point.
In this example, when determining the compensation value at the edge calibration point, the center calibration point is used as the origin of coordinates, and a surface fitting is performed on the plurality of edge calibration points and the plurality of actual distance values according to the reference value to obtain a fitting equation; the fitting equation is configured to determine compensation values for a plurality of the edge calibration points. The compensation value at any edge calibration point can be determined according to the fitting equation, and the flatness of the optical module can be improved when the fitting equation is applied to the optical module.
Specifically, the coordinate system is established by taking the central calibration point as the coordinate origin, wherein the calibration point is taken as the horizontal axis of the coordinate system, and the distance value and the actual distance value corresponding to the central coordinate point are taken as the vertical axis of the coordinate system.
And performing surface fitting on the central calibration point, the distance value corresponding to the central calibration point, the actual distance values measured by the edge calibration points and the edge calibration points to obtain a fitting equation.
Alternatively, to make the fitting equation more accurate, a plurality of actual distance values are typically measured; for example, 20-40 actual distance values can be obtained by measuring 20-40 edge calibration points.
Optionally, the parameters in the fitted equation are determined according to a least squares method.
For example, if the fitted image obtained by the surface fitting method is substantially a paraboloid, the fitting equation is determined as follows:
and obtaining parameters given in the fitting equation by using a least square method, wherein the parameters in the formula (1) are values of three coefficients a, b and c, and further obtaining the accurate fitting equation.
Alternatively, the fitting image is obtained according to the distance value and the actual distance value, wherein the fitting image is not limited to an elliptic paraboloid, and can be a curved surface in other forms. For example, the fitting equation is a curved surface equation, and the curved surface equation includes a cylindrical surface, a hyperbolic cylindrical surface, an elliptic cylindrical surface, and the like.
In one example, as shown in fig. 2, the light source of the to-be-measured optical module irradiation 102 on the calibration board 101 is divergent, that is, when the to-be-measured optical module emits light, and the light is emitted to the central calibration point to obtain the distance value between the central calibration point and the to-be-measured optical module, a plurality of actual distance values between a plurality of edge calibration points and the to-be-measured optical module can be obtained at the same time. Wherein the optical module under test is configured to electrically connect with an external computer capable of recording and displaying the distance value and a plurality of actual distance values; or the optical module to be tested is configured to be able to store the distance value and the plurality of actual distance values in a memory thereof and to display them through a display thereof.
Optionally, a plurality of edge calibration points are located around the center calibration point, for example, as shown in fig. 2, the calibration point at point 1, the calibration point at point 2, and the calibration points at points 4 to 10 are all edge calibration points.
Optionally, a plurality of the edge calibration points are uniformly distributed on the calibration plate in an array manner. As shown in fig. 2, point 0 is represented as a center index point, and points 1, 2, 4-10 are represented as edge index points, wherein the center index point is located at the geometric center of the calibration plate 101, and the edge calibration plates are uniformly distributed in a rectangular array or a circular array.
Optionally, the surface of the calibration plate 101 is a plane. Specifically, when the calibration board 101 and the optical module to be measured 102 are disposed opposite to each other, the surface of the calibration board 101 facing the optical module to be measured 102 is a plane. That is, the surface of the calibration plate 101 is flat and straight, so as to improve the accuracy of the compensation value at the edge calibration point, and further improve the accuracy of the flatness of the optical module.
According to another aspect of the present invention, there is provided a method for determining flatness of an optical module using the method for determining a compensation value described above, the method comprising the steps of:
arranging the fitting equation in a processor of an optical module;
arranging the optical module with the fitting equation arranged opposite to the shot object;
the subject has the center index point and a plurality of the edge index points; making difference between actual distance values corresponding to the edge calibration points and reference values to obtain a plurality of compensation values of the edge calibration points;
emitting light rays emitted by the optical module with the fitting equation to the shot object, and compensating the first image obtained by the optical module according to the plurality of compensation values to obtain a second image;
the second image is configured to mark a flatness of the optical module with the fitting equation set.
Specifically, as shown in fig. 3 to 4, when determining the flatness of the optical module to be measured by using the method for determining the compensation value, the fitting equation obtained in the method for determining the compensation value is set in the processor of the optical module to be measured, and is used for compensating the first image obtained by the optical module.
For example, a flatness algorithm is provided in the processor of the optical module, and the fitting equation is provided in the flatness algorithm.
When determining the flatness of the optical module to be tested, arranging the optical module with the fitting equation and the shot object oppositely; the subject may be a curtain or the like, for example. The optical modules referred to in this example are all "optical modules for which the fitting equation has been set".
The optical module is arranged on the optical module, and the optical module is arranged on the optical module and used for receiving the light emitted by the optical module. That is, the optical module can irradiate the panoramic view of the subject.
Wherein the selection of the predetermined distance is related to the size of the subject. In this example, the predetermined distance is 1m, i.e., the geometric center point of the subject is 1m from the vertical distance between the optical modules.
The subject has a center index point and a plurality of edge index points; according to a fitting equation, making difference values between actual distance values corresponding to the edge calibration points and reference values to obtain a plurality of compensation values of the edge calibration points;
wherein the center index point in the subject is located at the geometric center of the subject, and the plurality of edge index points are located around the center index plate.
Specifically, an optical module is enabled to emit light rays, the light rays are emitted to the shot object, and a first image obtained by the optical module is compensated according to a plurality of compensation values to obtain a second image;
for example, when the optical module obtains the first image, a flatness algorithm in a processor in the optical module is automatically started, the flatness algorithm already comprises the fitting equation, compensation values at a plurality of edge calibration points are obtained through the fitting equation, and the first image is compensated according to the compensation values.
Specifically, the subject has index points including a center index point, and edge index points capable of covering the surface of the subject as much as possible. For example, the surface of the subject has an edge calibration point 2, and edge calibration points 4-10, wherein the first image obtained by the optical module also has the edge calibration point 2, and the edge calibration points 4-10, as shown in fig. 3. The optical module emits light rays, and the light rays are emitted to a shot object to obtain a first image, wherein the first image is not displayed on a display of the optical module.
According to the compensation values of the edge calibration point 2 and the edge calibration points 4-10, specifically, a fitting equation is utilized, the coordinate values of the horizontal axis corresponding to the edge calibration point 2 and the edge calibration points 4-10 are brought into the fitting equation, actual distance values corresponding to different edge calibration points are respectively obtained, the obtained actual distance values and the distance values corresponding to the central calibration point 0 are subjected to difference values, the compensation values corresponding to different edge calibration points are respectively obtained, and the first image obtained by the optical module is compensated to obtain a second image. As shown in fig. 4, for the second image obtained after the compensation of the first image,
the coordinate values corresponding to the central calibration point and the plurality of edge calibration points are known variables in the fitting equation, that is, the coordinate values of any edge calibration point on the object to be shot can be obtained by establishing a coordinate system according to the central calibration point.
Specifically, when the optical module to be tested obtains the first image, the flatness algorithm in the processor in the optical module to be tested is automatically started, at this time, the flatness algorithm already comprises the equation for determining the compensation value in the invention, and the first image is compensated through the equation for determining the compensation value.
For example, a first image obtained by the optical module is shown in fig. 3, wherein the first image has the edge calibration point 2 corresponding to the subject, and the edge calibration points 4-10. The coordinate value corresponding to the edge calibration point is substituted into the fitting equation to obtain the actual distance value corresponding to the edge calibration point; and (4) making a difference value between the actual distance value and the distance value of the central calibration point, wherein the obtained difference value is a compensation value of the edge calibration point.
For example, if the compensation value at the center index point 0 is 0, the first image is not image-compensated here; the compensation value at the edge index point 2 is 0.1, then the first image is image compensated by 0.1 at this point, i.e. the image is stretched by 0.1 upwards at this point; the compensation value at the edge index point 4 is 0.05, the first image is image compensated at this point by 0.05, i.e. the image is stretched upwards by 0.05 at this point. In this way, a compensation value at any edge calibration point of the first image is calculated, and the image at any edge calibration point on the first image is compensated to obtain a compensated second image; as shown in fig. 4, the compensated second image presented by the optical module is a plane, i.e. the second image is flat and straight, and the second image is configured to mark the flatness of the optical module with the fitting equation set.
Optionally, the compensation values at the edge calibration points in this example are all positive values, i.e. the compensation is performed in such a way that the first image is stretched inwards by 0.1 at the edge calibration points, where "inwards" is stretched inwards in a direction perpendicular to the first image. When the compensation value at the edge calibration point is negative, that is, the compensation mode is that the first image is stretched outward by 0.1 at the edge calibration point, wherein "outward" is stretching outward in a direction perpendicular to the first image.
According to the method, a fitting equation is obtained by adopting a surface fitting method, and the compensation value at any edge calibration point can be obtained according to the fitting equation, so that the compensation value at any calibration point is more accurate; and meanwhile, the accuracy of the flatness of the optical module is improved by applying the fitting equation to the optical module.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A method of determining a compensation value, the method comprising the steps of:
providing a placement area configured for placing an optical module under test;
setting a calibration plate, wherein the calibration plate is provided with a calibration point, the calibration point comprises a central calibration point and a plurality of edge calibration points, and the central calibration point is positioned at the geometric center of the calibration plate;
enabling the optical module to be measured positioned in the placement area to be arranged over against the central calibration point, enabling the optical module to be measured to emit light rays, enabling the light rays to be emitted to the central calibration point to obtain a distance value between the central calibration point and the optical module to be measured, and enabling the distance value to be used as a reference value;
enabling the light rays to be emitted to the edge calibration points to obtain a plurality of actual distance values between the edge calibration points and the optical module to be tested;
taking the center index point as a coordinate origin, and performing surface fitting on a plurality of edge index points and a plurality of actual distance values according to a reference value to obtain a fitting equation;
the fitting equation is configured to determine compensation values for a plurality of the edge calibration points.
2. The method of claim 1, wherein the surface of the calibration plate is planar.
3. The method of claim 1, wherein a plurality of said edge index points are located around said center index point.
4. The method of claim 1, wherein the fitting equation is a surface equation.
5. The method of claim 1 or 4, wherein the parameters in the fitted equation are determined according to a least squares method.
6. A method for determining the flatness of an optical module using the method of any of claims 1 to 5, the method comprising the steps of:
arranging the fitting equation in a processor of an optical module;
arranging the optical module with the fitting equation arranged opposite to the shot object;
the subject has the center index point and a plurality of the edge index points; making difference between actual distance values corresponding to the edge calibration points and reference values to obtain a plurality of compensation values of the edge calibration points;
emitting light rays emitted by the optical module with the fitting equation to the shot object, and compensating the first image obtained by the optical module according to the plurality of compensation values to obtain a second image;
the second image is configured to mark a flatness of the optical module with the fitting equation set.
7. The method of claim 6, wherein the second image is configured as an image actually displayed by the optical module, and wherein the second image is a plane.
8. The method of claim 6, wherein stretching the first image according to the plurality of compensation values results in a second image.
9. The method of claim 6, wherein the coordinate values of the center index point and the edge index points are known variables in the fitting equation.
10. The method of claim 6, wherein a flatness algorithm is provided in a processor of the optical module, and wherein the fitting equation is provided in the flatness algorithm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895921A (en) * | 2020-08-05 | 2020-11-06 | 珠海博明视觉科技有限公司 | Compensation model for improving measurement precision of system to height difference |
| CN112629417A (en) * | 2020-12-14 | 2021-04-09 | 苏州耘侬软件科技有限公司 | Length measuring method, device, equipment and storage medium |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0388586A (en) * | 1989-08-31 | 1991-04-12 | Sharp Corp | Crt type projector |
| CN1518333A (en) * | 2003-01-08 | 2004-08-04 | Lg������ʽ���� | Image distortion correcting equipment and its method |
| CN1830207A (en) * | 2003-07-30 | 2006-09-06 | 卡西欧计算机株式会社 | Projector and method of projecting projection image |
| CN101661162A (en) * | 2009-09-09 | 2010-03-03 | 谭洪舟 | Distortion compensation method based on wide-angle lens |
| JP5590498B2 (en) * | 2009-09-07 | 2014-09-17 | 株式会社ニコン | Projection device |
| CN104299218A (en) * | 2013-07-17 | 2015-01-21 | 南京邮电大学 | Projector calibration method based on lens distortion rule |
| CN104537616A (en) * | 2014-12-20 | 2015-04-22 | 中国科学院西安光学精密机械研究所 | Correction Method of Fisheye Image Distortion |
| CN105635703A (en) * | 2015-12-25 | 2016-06-01 | 北京小鸟科技发展有限责任公司 | Projection method and device based on image geometric correction coordinate compression and projector |
| CN105847773A (en) * | 2016-03-29 | 2016-08-10 | 乐视控股（北京）有限公司 | Method and device used for correcting projected image distortion of projector |
| CN108961329A (en) * | 2018-06-22 | 2018-12-07 | 成都市极米科技有限公司 | Acquisition method, device and the computer readable storage medium of Projector Space location information |
| CN109600590A (en) * | 2018-11-30 | 2019-04-09 | 歌尔股份有限公司 | Antidote, device and the medium of projector image distortion |
| CN110111262A (en) * | 2019-03-29 | 2019-08-09 | 北京小鸟听听科技有限公司 | A kind of projector distortion correction method, device and projector |
-
2019
- 2019-11-25 CN CN201911168368.8A patent/CN110864649B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0388586A (en) * | 1989-08-31 | 1991-04-12 | Sharp Corp | Crt type projector |
| CN1518333A (en) * | 2003-01-08 | 2004-08-04 | Lg������ʽ���� | Image distortion correcting equipment and its method |
| CN1830207A (en) * | 2003-07-30 | 2006-09-06 | 卡西欧计算机株式会社 | Projector and method of projecting projection image |
| JP5590498B2 (en) * | 2009-09-07 | 2014-09-17 | 株式会社ニコン | Projection device |
| CN101661162A (en) * | 2009-09-09 | 2010-03-03 | 谭洪舟 | Distortion compensation method based on wide-angle lens |
| CN104299218A (en) * | 2013-07-17 | 2015-01-21 | 南京邮电大学 | Projector calibration method based on lens distortion rule |
| CN104537616A (en) * | 2014-12-20 | 2015-04-22 | 中国科学院西安光学精密机械研究所 | Correction Method of Fisheye Image Distortion |
| CN105635703A (en) * | 2015-12-25 | 2016-06-01 | 北京小鸟科技发展有限责任公司 | Projection method and device based on image geometric correction coordinate compression and projector |
| CN105847773A (en) * | 2016-03-29 | 2016-08-10 | 乐视控股（北京）有限公司 | Method and device used for correcting projected image distortion of projector |
| CN108961329A (en) * | 2018-06-22 | 2018-12-07 | 成都市极米科技有限公司 | Acquisition method, device and the computer readable storage medium of Projector Space location information |
| CN109600590A (en) * | 2018-11-30 | 2019-04-09 | 歌尔股份有限公司 | Antidote, device and the medium of projector image distortion |
| CN110111262A (en) * | 2019-03-29 | 2019-08-09 | 北京小鸟听听科技有限公司 | A kind of projector distortion correction method, device and projector |
Cited By (3)
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| CN111895921A (en) * | 2020-08-05 | 2020-11-06 | 珠海博明视觉科技有限公司 | Compensation model for improving measurement precision of system to height difference |
| CN111895921B (en) * | 2020-08-05 | 2022-03-11 | 珠海博明视觉科技有限公司 | Compensation method for improving measurement precision of system to height difference |
| CN112629417A (en) * | 2020-12-14 | 2021-04-09 | 苏州耘侬软件科技有限公司 | Length measuring method, device, equipment and storage medium |
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