CN110456602B - Projection pattern correction device, method and system of projection system - Google Patents
Projection pattern correction device, method and system of projection system Download PDFInfo
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- CN110456602B CN110456602B CN201910779845.8A CN201910779845A CN110456602B CN 110456602 B CN110456602 B CN 110456602B CN 201910779845 A CN201910779845 A CN 201910779845A CN 110456602 B CN110456602 B CN 110456602B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/147—Optical correction of image distortions, e.g. keystone
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Abstract
The invention discloses a projection pattern correcting device, method and system of a projection system, which comprise a first distance measuring sensor and a second distance measuring sensor which are arranged on a front control panel of a projector, an inertia measuring unit arranged on the projector, and a processor connected with the output ends of the first distance measuring sensor, the second distance measuring sensor and the inertia measuring unit, wherein the connecting line of the first distance measuring sensor and the second distance measuring sensor is not vertical to a horizontal line. According to the invention, by pre-establishing the corresponding relation table between the relative position information between the projector and the curtain and the projection picture size, when the projection picture of the projector is corrected, the processor matches the corresponding target projection picture size according to the first distance, the second distance and the included angle which are respectively obtained by the first distance measuring sensor, the second distance measuring sensor and the inertia measuring unit and the pre-established corresponding relation table, so that the rectangular picture of the projection picture of the projector is corrected according to the projection picture size, the structural design is simple, and the cost is lower.
Description
Technical Field
The embodiment of the invention relates to the technical field of projection equipment, in particular to a projection pattern correction device, a projection pattern correction method and a projection pattern correction system of a projection system.
Background
In the daily use of the projector, the position of the projector is as far as possible perpendicular to the projection screen to ensure the projection effect, and if the position of the projector and the projection screen are not perpendicular to each other, the projection picture can generate a trapezoid. In this case, the user needs to correct the trapezoid using a "trapezoid correction function" on the projector to ensure that the picture becomes a standard rectangle.
The projector usually has a certain pitch angle in the vertical direction during use, so that a projection picture is deformed in a trapezoidal shape in the vertical direction, the conventional projectors have a trapezoidal correction function in the vertical direction, and the trapezoidal correction in the vertical direction is usually performed by adopting optical trapezoidal correction and digital trapezoidal correction methods, wherein the optical trapezoidal correction is realized by adjusting the physical position of a lens, and the digital trapezoidal correction is realized by a software method.
However, in practical applications, there is a trapezoid generated by the offset of the horizontal position in the projector, and in the prior art, the projection pattern is usually photographed by Camera, and then the horizontal trapezoid is corrected after the pattern is analyzed, which results in complicated design, high cost, and high requirement for the processing capacity of the CPU.
Therefore, it is a problem to be solved by those skilled in the art to provide a projection pattern correction apparatus, method and system for a projection system, which has a simple design structure, low cost and low requirement on CPU processing capability.
Disclosure of Invention
The embodiment of the invention aims to provide a projection pattern correction device, a projection pattern correction method and a projection pattern correction system of a projection system, which have the advantages of simple structural design, lower cost, lower requirement on the processing capacity of a CPU in the use process and wider application range.
In order to solve the above technical problem, an embodiment of the present invention provides a projection pattern correction apparatus for a projection system, including: set up first range finding sensor and second range finding sensor on the control panel before the projector, set up inertial measurement unit on the projector, with first range finding sensor, second range finding sensor with the treater that inertial measurement unit's output is connected, first range finding sensor with the line of second range finding sensor is not perpendicular to the water line, inertial measurement unit includes gyroscope and accelerometer, wherein:
the first distance measuring sensor is used for acquiring a first distance between the first distance measuring sensor and the curtain;
the second distance measuring sensor is used for acquiring a second distance between the second distance measuring sensor and the curtain;
the inertia measurement unit is used for acquiring an included angle between the projector and the curtain in the vertical direction;
the processor is used for matching a corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle, and correcting the projection picture of the projector according to the target projection picture size to enable the projection picture of the projector to be a rectangular picture; and the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle.
Optionally, the processor is further configured to control the first distance measuring sensor, the second distance measuring sensor, and the inertia measuring unit to start working when the acceleration value output by the accelerometer is greater than a preset threshold value.
Optionally, a connection line between the first ranging sensor and the second ranging sensor passes through the center of the projector lens.
Optionally, a line connecting the first distance measuring sensor, the center of the projector lens, and the second distance measuring sensor is parallel to a horizontal line.
The embodiment of the invention also correspondingly improves a projection pattern correction method of the projection system, which is applied to the projection pattern correction device and comprises the following steps:
receiving a first distance between the first distance measuring sensor and the curtain, a second distance between the second distance measuring sensor and the curtain and an included angle between the projector and the curtain in the vertical direction, wherein the first distance, the second distance and the curtain are sent by the first distance measuring sensor, and the included angle between the projector and the curtain is sent by the inertial measuring unit, and the inertial measuring unit comprises a gyroscope and an accelerometer;
matching corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
and correcting the projection picture of the projector according to the size of the target projection picture to enable the projection picture of the projector to be a rectangular picture.
Optionally, the inertial measurement unit includes a gyroscope and an accelerometer;
the method further comprises the following steps:
and when the acceleration value output by the accelerometer is larger than a preset threshold value, controlling the first distance measuring sensor and the second distance measuring sensor to start working.
The embodiment of the present invention further provides a projection pattern correction system of a projection system, including:
the receiving module is used for receiving a first distance between the first distance measuring sensor and the curtain, a second distance between the second distance measuring sensor and the curtain and an included angle between the projector and the curtain in the vertical direction, wherein the first distance between the projector and the curtain is sent by the first distance measuring sensor, the second distance between the projector and the curtain is sent by the second distance measuring sensor, and the included angle between the projector and the curtain in the vertical direction is sent by the inertia measuring unit;
the matching module is used for matching corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
and the calibration module is used for correcting the projection picture of the projector according to the size of the target projection picture so as to enable the projection picture of the projector to be a rectangular picture.
The embodiment of the invention provides a projection pattern correction device, a projection pattern correction method and a projection pattern correction system, wherein the projection pattern correction device, the projection pattern correction method and the projection pattern correction system comprise the following steps: the distance measuring device comprises a first distance measuring sensor and a second distance measuring sensor which are arranged on a front control panel of the projector, an inertia measuring unit arranged on the projector, and a processor connected with the output ends of the first distance measuring sensor, the second distance measuring sensor and the inertia measuring unit, wherein the connecting line of the first distance measuring sensor and the second distance measuring sensor is not vertical to a horizontal line, and the inertia measuring unit comprises a gyroscope and an accelerometer. In the embodiment of the invention, the corresponding relation table between the relative position information between the projector and the curtain and the size of the projection picture is established in advance, and when the projection picture of the projector is corrected, the processor can match the size of the projection picture corresponding to the currently measured group of parameters according to the first distance and the second distance which are respectively obtained by the first distance measuring sensor, the second distance measuring sensor and the inertia measuring unit arranged on the projector, the included angle of the projector and the curtain in the vertical direction and the pre-established corresponding relation table, and can determine the shape and the specific parameters of the projection picture according to the size of the projection picture, so that the projection picture of the projector is corrected according to the shape and the parameters of the projection picture, and the projection picture of the projector on the curtain is presented in a rectangular picture form The cost is lower, the requirement on the processing capacity of the CPU is lower, and the application range is wider.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a projection pattern correction apparatus of a projection system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a front control panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another front control panel according to an embodiment of the present invention;
fig. 4 is a schematic view of light propagation in the horizontal direction of a projector according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a projection pattern correction method of a projection system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a projection pattern correction system of a projection system according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a projection pattern correction device, a projection pattern correction method and a projection pattern correction system of a projection system, which have the advantages of simple structural design, lower cost, lower requirement on the processing capacity of a CPU (Central processing Unit) in the using process and wider application range.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection pattern correction apparatus of a projection system according to an embodiment of the present invention.
The projection pattern correction apparatus includes: set up first range sensor 2 and second range sensor 3 on control panel 1 before the projector, set up inertial measurement unit 4 on the projector, with first range sensor 2, processor 5 that second range sensor 3 and inertial measurement unit 4's output are connected, first range sensor 2 and second range sensor 3's line is not perpendicular to the water line, inertial measurement unit 4 includes gyroscope and accelerometer, wherein:
the first distance measuring sensor 2 is used for acquiring a first distance between the first distance measuring sensor and the curtain;
the second distance measuring sensor 3 is used for acquiring a second distance between the curtain and the second distance measuring sensor;
the inertia measurement unit 4 is used for acquiring an included angle between the projector and the curtain in the vertical direction;
the processor 5 is configured to match a corresponding target projection picture size from a pre-established correspondence table between the relative position information and the projection picture size according to the first distance, the second distance, and the included angle, and correct the projection picture of the projector according to the target projection picture size, so that the projection picture of the projector is a rectangular picture; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle.
It should be noted that, in this embodiment, the first distance measuring sensor 2 acquires information about a distance between itself and the curtain (i.e. a first distance), the second distance measuring sensor 3 acquires information about a distance between itself and the curtain (i.e. a second distance), and since the first distance measuring sensor 2 and the second distance measuring sensor 3 are disposed on the front control panel 1 of the projector and the lens of the projector is also disposed on the front control panel 1 of the projector, a horizontal position of the projector relative to the curtain can be determined by the first distance and the second distance, and the inertial measurement unit 4 can acquire an included angle between the projector and the curtain in a vertical direction, that is, a vertical position of the projector relative to the curtain can be obtained.
Since the shape of the projection image of the projector on the screen changes when the position of the projector relative to the screen changes, for the projector provided with the first distance measuring sensor 2, the second distance measuring sensor 3 and the inertial measuring unit 4 (specifically, the 6-degree-of-freedom inertial measuring unit) (the positions of the first distance measuring sensor 2, the second distance measuring sensor 3 and the inertial measuring unit 4 on the projector are fixed), the data information and the corresponding projection image size respectively measured by the first distance measuring sensor 2, the second distance measuring sensor 3 and the inertial measuring unit 4 at each position can be obtained in advance by changing the relative position between the projector and the screen, so as to obtain the corresponding relationship between the sets of relative position information and the projection image size, and establish a corresponding relationship table, and store the corresponding relationship table in the memory, each relative position information includes a set of first distance, second distance and angle data parameters.
In the using process of the projector, the first distance, the second distance and the included angle between the projector and the curtain in the vertical direction can be respectively obtained through the first distance measuring sensor 2, the second distance measuring sensor 3 and the inertia measuring unit 4, so that the projection picture size corresponding to the set of data parameters is matched from the corresponding relation table of the relative position between the projector and the curtain and the projection picture size established in advance according to the set of data parameters and is used as the target projection picture size, the processor 5 can analyze the target projection picture size and determine the distortion condition of the projection picture, and the shape of the image output by the projector and before display is adjusted and supplemented, so that the image displayed on the curtain has a rectangular effect, and the bidirectional trapezoidal correction can be automatically realized. The processor may specifically adjust and compensate the image before display by using a difference algorithm after analyzing the distorted projection picture corresponding to the size of the target projection picture, and of course, may also use other image processing methods.
Further, in this embodiment, the processor 5 is further configured to control the first distance measuring sensor 2 and the second distance measuring sensor 3 to start to operate when the acceleration value output by the accelerometer is greater than a preset threshold.
It should be noted that, in practical application, whether the projector moves or not may be determined by an acceleration value detected by the accelerometer, specifically, the acceleration value may be compared with a preset threshold, and when the acceleration value is greater than the preset threshold, it is determined that the projector moves, at this time, the processor 5 may control the first distance measuring sensor 2 and the second distance measuring sensor 3 to start working, that is, measure a distance between itself and the curtain, and obtain the first distance and the second distance, respectively, so as to be used for subsequently correcting the projection picture. That is, in the present application, after detecting that the projector moves, the work of correcting the projection picture is performed to ensure that the projection picture of the projector on the curtain shows a rectangular effect.
Furthermore, in order to make the structural design simpler, the connection line of the first distance measuring sensor 2 and the second distance measuring sensor 3 may pass through the center of the projector lens 11 in the present embodiment. Specifically, referring to fig. 3, at this time, a first distance d1 and a second distance d2 measured by the first distance measuring sensor 2 and the second distance measuring sensor 3 and a light propagation diagram of the projector in the horizontal direction are shown in fig. 4, where a represents a curtain, d represents a distance between the center of the projector lens 11 and the curtain, X and Y represent distances between the first distance measuring sensor 2 and the second distance measuring sensor 3 and the center of the projector lens 11, and α represents an included angle between the projector lens 11 and the curtain in the horizontal direction.
In addition, it should be further noted that the inertial measurement unit 4 in this embodiment may be disposed at any position in the projector except for the front control panel 1, so that the reserved space on the front control panel 1 may be reduced, and the influence on the ID may be reduced.
Therefore, in the embodiment of the present invention, by pre-establishing the corresponding relationship table between the relative position information between the projector and the curtain and the projection picture size, and when correcting the projection picture of the projector, the processor may match the projection picture size corresponding to the currently measured set of parameters according to the first distance and the second distance respectively obtained by the first distance measuring sensor, the second distance measuring sensor and the inertia measuring unit arranged on the projector, the included angle of the projector and the curtain in the vertical direction and the pre-established corresponding relationship table, and may determine the projection picture shape and specific parameters according to the projection picture size, so as to correct the projection picture of the projector according to the shape and parameters of the projection picture, so that the projection picture of the projector on the curtain is presented in the form of a rectangular picture The cost is lower, the requirement on the processing capacity of the CPU is lower, and the application range is wider.
Referring to fig. 5, an embodiment of the present invention further provides a projection pattern correction method of a projection system, applied to the projection pattern correction apparatus, the method including:
s110: receiving a first distance between the first distance measuring sensor and the curtain, a second distance between the second distance measuring sensor and the curtain and an included angle between the projector and the curtain in the vertical direction, wherein the first distance, the second distance and the curtain are sent by the first distance measuring sensor, and the included angle is sent by an inertia measuring unit, and the inertia measuring unit comprises a gyroscope and an accelerometer;
s120: matching corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
s130: and correcting the projection picture of the projector according to the size of the target projection picture to enable the projection picture of the projector to be a rectangular picture.
Further, the inertial measurement unit comprises a gyroscope and an accelerometer;
the method further comprises the following steps:
and when the acceleration value output by the accelerometer is larger than a preset threshold value, controlling the first distance measuring sensor and the second distance measuring sensor to start working.
It should be noted that the projection pattern correction method of the projection system provided in this embodiment has the same beneficial effects as the projection pattern correction device of the projection system provided in the above embodiment, and for the specific description of the projection pattern correction device of the projection system related in this embodiment, refer to the above embodiment, which is not repeated herein.
On the basis of the above method embodiments, the embodiment of the present invention further provides a projection pattern correction system of a projection system, and specifically refer to fig. 6. The system comprises:
the receiving module 21 is configured to receive a first distance between the projector and the curtain, which is sent by the first distance measuring sensor, a second distance between the projector and the curtain, which is sent by the second distance measuring sensor, and an included angle between the projector and the curtain, which is sent by the inertia measuring unit, in the vertical direction;
the matching module 22 is configured to match a corresponding target projection picture size from a pre-established correspondence table between the relative position information and the projection picture size according to the first distance, the second distance, and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
the calibration module 23 is configured to correct a projection image of the projector according to the size of the target projection image, so that the projection image of the projector is a rectangular image.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A projected pattern correction apparatus for a projection system, comprising: set up first range finding sensor and second range finding sensor on the control panel before the projector, set up inertial measurement unit on the projector, with first range finding sensor, second range finding sensor with the treater that inertial measurement unit's output is connected, first range finding sensor with the line of second range finding sensor is not perpendicular to the water line, inertial measurement unit includes gyroscope and accelerometer, wherein:
the first distance measuring sensor is used for acquiring a first distance between the first distance measuring sensor and the curtain;
the second distance measuring sensor is used for acquiring a second distance between the second distance measuring sensor and the curtain;
the inertia measurement unit is used for acquiring an included angle between the projector and the curtain in the vertical direction;
the processor is used for matching a corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle, and correcting the projection picture of the projector according to the target projection picture size to enable the projection picture of the projector to be a rectangular picture; and the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle.
2. The projection pattern correction apparatus of claim 1, wherein the processor is further configured to control the first distance measuring sensor and the second distance measuring sensor to start operating when the acceleration value output by the accelerometer is greater than a preset threshold.
3. The projection pattern correction apparatus of a projection system of claim 1, wherein a line connecting the first distance measuring sensor and the second distance measuring sensor passes through a center of the projector lens.
4. The projection pattern correction apparatus of a projection system according to claim 3, wherein a line connecting the first distance measuring sensor, the center of the projector lens, and the second distance measuring sensor is parallel to a horizontal line.
5. A projection pattern correction method of a projection system, applied to the projection pattern correction apparatus according to any one of claims 1 to 4, comprising:
receiving a first distance between the first distance measuring sensor and the curtain, a second distance between the second distance measuring sensor and the curtain and an included angle between the projector and the curtain in the vertical direction, wherein the first distance, the second distance and the curtain are sent by the first distance measuring sensor, and the included angle between the projector and the curtain is sent by the inertial measuring unit, and the inertial measuring unit comprises a gyroscope and an accelerometer;
matching corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
and correcting the projection picture of the projector according to the size of the target projection picture to enable the projection picture of the projector to be a rectangular picture.
6. The projection pattern correction method of a projection system according to claim 5, wherein the inertial measurement unit includes a gyroscope and an accelerometer;
the method further comprises the following steps:
and when the acceleration value output by the accelerometer is larger than a preset threshold value, controlling the first distance measuring sensor and the second distance measuring sensor to start working.
7. A projection pattern correction system of a projection system, applied to the projection pattern correction apparatus according to any one of claims 1 to 4, comprising:
the receiving module is used for receiving a first distance between the first distance measuring sensor and the curtain, a second distance between the second distance measuring sensor and the curtain and an included angle between the projector and the curtain in the vertical direction, wherein the first distance between the projector and the curtain is sent by the first distance measuring sensor, the second distance between the projector and the curtain is sent by the second distance measuring sensor, and the included angle between the projector and the curtain in the vertical direction is sent by the inertia measuring unit;
the matching module is used for matching corresponding target projection picture size from a corresponding relation table of the pre-established relative position information and the projection picture size according to the first distance, the second distance and the included angle; the relative position information between the projector and the curtain is obtained according to the first distance, the second distance and the included angle;
and the calibration module is used for correcting the projection picture of the projector according to the size of the target projection picture so as to enable the projection picture of the projector to be a rectangular picture.
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| CN111294579B (en) * | 2020-02-19 | 2021-12-28 | 母国标 | Method and system for aligning projection picture with curtain center |
| CN111443557A (en) * | 2020-05-13 | 2020-07-24 | 浙江宝妈创客品牌管理有限公司 | Multimedia projection automatic correction device based on light sensation control |
| CN111800620A (en) * | 2020-08-18 | 2020-10-20 | 深圳市慧视智图科技有限公司 | Noninductive trapezoidal correction module of projector and calculation method thereof |
| CN111935468B (en) * | 2020-09-24 | 2021-01-22 | 歌尔股份有限公司 | Method and device for detecting deviation of projection center and computer readable storage medium |
| CN114390261B (en) * | 2020-10-20 | 2023-10-24 | 深圳海翼智新科技有限公司 | Projection system, trapezoidal correction method thereof and device with storage function |
| CN113163186B (en) * | 2020-12-03 | 2022-06-10 | 深圳市当智科技有限公司 | Projection method, system and storage medium based on horizontal correction of distance sensor |
| CN115086622B (en) * | 2021-03-12 | 2024-05-24 | 中强光电股份有限公司 | Projector and correction method thereof |
| CN116708734B (en) * | 2023-08-02 | 2023-11-24 | 深圳市科迈信息技术有限公司 | Calibration equipment and method based on projector output image |
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