CN102148949A - Projector image correction method, system and projector - Google Patents
Projector image correction method, system and projector Download PDFInfo
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Abstract
The invention discloses a projector image correction method, which comprises the steps as follows: space angle information of an imaging plane is obtained; space angle information of a projector is obtained; the space angle difference between the imaging plane and the projector is calculated to obtain a congruent relationship between a point on an image generated in the projector and a point on an image formed on the imaging plane; and the image generated in the projector is corrected according to the congruent relationship. The invention also discloses a projector image correction system and the projector. The projector image correction method and the corresponding system and the projector can be adopted to simultaneously implement correction on a plurality of situations like verticality, levelness and torsion on the image generated in the projector according to the arrangement angles of the projector and the imaging plane, reduce the erecting requirements on the projector and the imaging plane, and broaden the application occasions of the projector.
Description
Technical field
The present invention relates to technical field of image processing, particularly relate to a kind of projector method for correcting image, system and projector.
Background technology
Along with the continuous progress of scientific and technological level, projector is applied to various occasions such as meeting, teaching and even family expenses more and more widely.In actual use, the putting position of projector may be various.The position difference of putting, then the projection ray that sends of projector is also different with angle between the imaging plane (for example cloth curtain or wall).And the angle between projection ray and the imaging plane directly has influence on the shape (usually should be the rectangle of a rule) of image on imaging plane that projects.When the angle between projection ray and the imaging plane was improper, the shape of the image that projects on imaging plane might be other shape.At this moment, just need proofread and correct the image that projector forms.
The projector that has image correction function in the prior art mainly proofreaies and correct by angle induction device is set in projector.Its principle is: debug when dispatching from the factory, the position between projector and imaging plane relation adjusted in projector, with this moment projector putting position as initial value.When the user uses, need make imaging plane satisfy the position of debugging when projector dispatches from the factory.Angle induction device is responded to the putting position of projector's this moment and the difference between the initial value then.The image forming program of projector inside carries out image rectification according to this difference again.
Owing to have the projector of image correction function in the prior art, can only carry out image rectification according to the putting position of projector self; So, the decorating position of imaging plane and projector is had relatively high expectations.Decorating position when imaging plane or projector is subject to the space landform, and in the time of can't satisfying Default Value, projector of the prior art can't be a standard shape with image rectification.
Summary of the invention
The purpose of this invention is to provide a kind of projector method for correcting image, system and projector, can proofread and correct the image that the projector place generates according to the angle of putting of projector and imaging plane simultaneously.
For achieving the above object, the invention provides following scheme:
A kind of projector method for correcting image comprises:
Obtain the space angle information of imaging plane;
Obtain the space angle information of projector;
Calculate the space angle difference between described imaging plane and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
According to described corresponding relation, proofread and correct the image that the projector place generates.
Preferably, the described space angle information of obtaining imaging plane comprises:
Determine the absolute reference angle;
Obtain the deflection angle between described imaging plane and the absolute reference angle.
Preferably, the described space angle information of obtaining projector comprises:
Determine the absolute reference angle;
Obtain the deflection angle between described projector and the absolute reference angle.
Preferably, the space angle difference between described imaging plane of described calculating and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
According to described corresponding relation, proofread and correct the image that the projector place generates, for:
Calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place, generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
According to described coordinate conversion matrix, proofread and correct the image that the projector place generates.
A kind of projector image correction system comprises:
Imaging plane angle information acquiring unit is used to obtain the space angle information of imaging plane;
Projector's angle information acquiring unit is used to obtain the space angle information of projector;
Computing unit is used to calculate the space angle difference between described imaging plane and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
Image correction unit is used for according to described corresponding relation, proofreaies and correct the image that the projector place generates.
Preferably, described imaging plane angle information acquiring unit comprises:
First determines subelement with reference to angle, is used for determining the absolute reference angle;
First deflection angle obtains subelement, is used to obtain the deflection angle between described imaging plane and the absolute reference angle.
Preferably, described projector angle information acquiring unit comprises:
Second determines subelement with reference to angle, is used for determining the absolute reference angle;
Second deflection angle obtains subelement, is used to obtain the deflection angle between described projector and the absolute reference angle.
Preferably, also comprise:
The wireless signal Transmit-Receive Unit is used to realize communicating by letter between described imaging plane angle information acquiring unit and the described projector angle information acquiring unit.
Preferably, described computing unit comprises:
Reference axis deflection angle computation subunit is used to calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place;
Transition matrix generates subelement, is used to generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
Described image correction unit comprises:
The image rectification subelement is used for according to described coordinate conversion matrix, proofreaies and correct the image that the projector place generates.
Preferably, described first determines that with reference to angle subelement is an electronic compass, is used to respond to geographical locational direct north, to determine the absolute reference angle;
Described first deflection angle obtains subelement and comprises:
Obliquity sensor is used for each reference axis deflection angle with respect to the horizontal plane of the coordinate system at place, induction image forming plane;
Microprocessor is used to receive the dateout of described electronic compass and obliquity sensor, and each reference axis of coordinate system of calculating described imaging plane place is with respect to the deflection angle of described absolute reference angle.
Preferably, described second determines that with reference to angle subelement is an electronic compass, is used to respond to geographical locational direct north, to determine the absolute reference angle;
Described second deflection angle obtains subelement and comprises:
Obliquity sensor is used to respond to each reference axis deflection angle with respect to the horizontal plane of the coordinate system at projector place;
Microprocessor is used to receive the dateout of described electronic compass and obliquity sensor, and each reference axis of coordinate system of calculating described projector place is with respect to the deflection angle of described absolute reference angle.
A kind of projector comprises aforesaid projector image correction system.
Projector disclosed by the invention method for correcting image and corresponding system and projector, by obtaining imaging plane and projector space angle information separately respectively, calculate angle difference between the two, corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane, according to this corresponding relation, proofread and correct the image that the projector place generates; Can proofread and correct the image that the projector place generates according to the angle of putting of projector and imaging plane simultaneously.
In addition, projector disclosed by the invention method for correcting image, system and projector can also carry out vertically the image that projector place generates, the correction of multiple situations such as level, distortion.Therefore, adopt method of the present invention, can reduce the requirement of setting up of projector and imaging plane, the occasion that projector equipment can be used is more extensive.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the described projector of an embodiment of the invention method for correcting image flow chart;
Fig. 2 is the image rectification principle schematic;
Fig. 3 is the vertical correction schematic diagram;
Fig. 4 is the level correction schematic diagram;
Fig. 5 is the skew control schematic diagram;
Fig. 6 is the described projector of an embodiment of the invention image correction system structure chart;
Fig. 7 is the embodiment of the invention described imaging plane angle information acquiring unit or projector's angle information acquiring unit structure chart.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, be the described projector of embodiment of the invention method for correcting image flow chart.As shown in Figure 1, this method comprises:
S101: the space angle information of obtaining imaging plane;
S102: the space angle information of obtaining projector;
S103: calculate the space angle difference between described imaging plane and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
S104:, adjust the image that the projector place generates according to described corresponding relation.
Among the present invention, the space angle information of imaging plane or projector can be meant that imaging plane or projector are with respect to a certain deflection angle with reference to angle.Here the reference angle of mentioning is an absolute angle, and promptly imaging plane or projector are pairing is identical with reference to angle.
Therefore, step S101: obtain the space angle information of imaging plane, can comprise:
Determine the absolute reference angle;
Obtain the deflection angle between described imaging plane and the absolute reference angle.
Equally, step S102: obtain the space angle information of projector, can comprise:
Determine the absolute reference angle;
Obtain the deflection angle between described projector and the absolute reference angle.
This absolute reference angle can be determined by the line of induction direction in magnetic field of the earth.For example, can adopt the inductively direction to the north pole of signal magnetic field of electronic compass, determine the absolute reference angle according to this direction.For ease of implementing, can adopt Descartes's rectangular coordinate system to describe the absolute reference angle among the present invention.Understand easily, three reference axis x of rectangular coordinate system, y, among the z, determine the direction of any one reference axis after, the direction of all the other two reference axis has also just been determined.Therefore, the direction to the north pole that electronic compass can be sensed is as the direction of z axle, and then definite absolute reference angle.
Determine after the absolute reference angle, can obtain imaging plane or projector by the obliquity sensor induction, and the deflection angle between the absolute reference angle.Describe under the situation of absolute reference angle in the employing rectangular coordinate system, deflection angle between imaging plane and the absolute reference angle just can be expressed as each reference axis of the rectangular coordinate system at imaging plane place, and as the deflection angle between each reference axis of the rectangular coordinate system of absolute reference angle.In like manner, projector and just can be expressed as each reference axis of the rectangular coordinate system at projector place with reference to the deflection angle between the angle, and as the deflection angle between each reference axis of the rectangular coordinate system of absolute reference angle.
Among the step S103, space angle difference between imaging plane and the described projector, can be meant deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at imaging plane place and projector place (deflection angle herein can calculate by projector and imaging plane separately and the difference between the absolute reference angle).
Therefore, step S103 can for: calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place, generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
Accordingly, step S104 can for: according to described coordinate conversion matrix, proofread and correct the image that the projector place generates.
According to this deflection angle,, can generate coordinate conversion matrix in conjunction with mathematical existing formula.The implication of this coordinate conversion matrix is, the coordinate of the point on the image that the projector place generates, and project to transformational relation between the coordinate of the point on the image that forms after the imaging plane.According to this coordinate conversion matrix, can proofread and correct the image that the projector place generates, and then be implemented in the picture shape (for example rectangle) of formation rule on the imaging plane.
Concrete, shown in Fig. 2 (image rectification principle schematic):
Point on the reference axis of Fig. 2 left side is represented the point on the image that the projector place generates, and the point on the reference axis of right side represents to project the point behind the imaging plane.
Suppose the some P on the image that projector place generates
1Coordinate be (2,2), wish a some P in theory
1Project the some P behind the imaging plane
2Coordinate also be (2,2).But, owing to have angle difference between projector and the imaging plane, so some P
1Project that the actual point that obtains is P behind the imaging plane
3(2,3).So, can obtain a coordinate conversion matrix, the transformational relation between the coordinate of the point on the image that this coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane is: to unit of right translation.Can carry out inverse transformation to the coordinate that hope projects the point that imaging plane (2,2) locates according to this coordinate conversion matrix, calculate original some P
1Should adjust to the some P on the image that projector place generates
4(2,1), and to original some P
1Adjust.
Need to prove that above-mentioned instantiation is the specific implementation of the solution of the present invention for convenience of explanation just, so comparatively simple.In actual applications, the corresponding relation between the point on the image that forms on point on the image of projector's place's generation and the imaging plane is than much complicated in this example.
Adopt method of the present invention, by obtaining imaging plane and projector space angle information separately respectively, calculate angle difference between the two, corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane, according to this corresponding relation, proofread and correct the image that the projector place generates; Can proofread and correct the image that the projector place generates according to the angle of putting of projector and imaging plane simultaneously.And can the image that projector place generates be carried out vertically, the correction of multiple situations such as level, distortion.Therefore, adopt method of the present invention, can reduce the requirement of setting up of projector and imaging plane, the occasion that projector equipment can be used is more extensive.
About the implication and the effect of vertical, level, skew control, can be referring to Fig. 3 to 5.
Fig. 3 is the vertical correction schematic diagram.The rectangular tables in Fig. 3 left side is shown as the picture plane, the left side up big and down small trapezoidal (trapezoidal herein just for convenience of explanation and for example, Fig. 4 and Fig. 5 also are as a same reason, should not be construed as the restricted explanation to effect of the present invention) outward flange of the image that forms on the imaging plane of expression.Deformation has taken place in image, has become up big and down small trapezoidal.After adopting method for correcting image of the present invention, the outward flange of the image that forms on the imaging plane has become regular rectangle shown in Fig. 3 right side.
Fig. 4 is the level correction schematic diagram, and Fig. 5 is the skew control schematic diagram.The implication of Fig. 4 or Fig. 5 is identical with Fig. 3, and the left side is the image before proofreading and correct, and the right side is the image after proofreading and correct.Owing to Fig. 3 has been carried out more detailed explanation, herein so no longer Fig. 4 and Fig. 5 are given unnecessary details.
Corresponding with projector of the present invention method for correcting image, the invention also discloses a kind of projector image correction system.
Referring to Fig. 6, be the described projector of embodiment of the invention image correction system structure chart.As shown in Figure 6, this system comprises:
Imaging plane angle information acquiring unit 601 is used to obtain the space angle information of imaging plane;
Projector's angle information acquiring unit 602 is used to obtain the space angle information of projector;
In the practical application, imaging plane angle information acquiring unit 601 can comprise:
First determines subelement with reference to angle, is used for determining the absolute reference angle;
First deflection angle obtains subelement, is used to obtain the deflection angle between described imaging plane and the absolute reference angle.
Projector's angle information acquiring unit 602 can comprise:
Second determines subelement with reference to angle, is used for determining the absolute reference angle;
Second deflection angle obtains subelement, is used to obtain the deflection angle between described projector and the absolute reference angle.
Reference axis deflection angle computation subunit is used to calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place;
Transition matrix generates subelement, is used to generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
Corresponding with computing unit 603, image correction unit 604 can comprise:
The image rectification subelement is used for according to described coordinate conversion matrix, proofreaies and correct the image that the projector place generates.
In the practical application, the embodiment of the invention described imaging plane angle information acquiring unit or projector's angle information acquiring unit can adopt electronic compass or obliquity sensor to realize.Referring to Fig. 7, be the embodiment of the invention described imaging plane angle information acquiring unit or projector's angle information acquiring unit structure chart.As shown in Figure 7, comprising:
Wherein, imaging plane can be the cloth curtain that is specifically designed to Display projector machine image, also can be common wall etc.As long as this plane is smooth, and can reflective projection light, present projected image, can be with this plane as the imaging plane in the present embodiment.This unit (or device) can be when needs use projector, is installed on the imaging plane again; Also can be to be installed in advance on the imaging plane, like this, when using projector, just need not again this device to be provided with.In like manner, this device also can set in advance in projector, also can be installed in the projector when needs use projector again.
In the practical application, system disclosed in this invention can also comprise:
The wireless signal Transmit-Receive Unit is used to realize communicating by letter between described imaging plane angle information acquiring unit and the described projector angle information acquiring unit.
For ease of explanation, the imaging plane angle information acquiring unit that will be arranged on the imaging plane place in this specification is called first device, and the projector's angle information acquiring unit that is arranged on the projector place is called second device.The wireless signal Transmit-Receive Unit can comprise wireless signal transmitting element and wireless signal receiving element.
In first device, can comprise the wireless signal transmitting element, the angle information that is used for imaging plane that first device is obtained sends (can be sent to second install also can be sent to projector).
In second device, can comprise the wireless signal receiving element, be used to receive the angle information of the imaging plane that first device sends.
Certainly, also can make first device and second device include wireless signal transmitting element and wireless signal receiving element, so that produce.
Communication modes between wireless signal transmitting element and the wireless signal receiving element can adopt the mode of RF or ZigBee, or active RFID mode also can.Be not particularly limited herein.
The invention also discloses a kind of projector, this projector comprises projector disclosed in this invention image correction system.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed system of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
Used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. projector's method for correcting image is characterized in that, comprising:
Obtain the space angle information of imaging plane;
Obtain the space angle information of projector;
Calculate the space angle difference between described imaging plane and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
According to described corresponding relation, proofread and correct the image that the projector place generates.
2. method according to claim 1 is characterized in that, the described space angle information of obtaining imaging plane comprises:
Determine the absolute reference angle;
Obtain the deflection angle between described imaging plane and the absolute reference angle.
3. method according to claim 1 is characterized in that, the described space angle information of obtaining projector comprises:
Determine the absolute reference angle;
Obtain the deflection angle between described projector and the absolute reference angle.
4. according to each described method of claim 1 to 3, it is characterized in that, space angle difference between described imaging plane of described calculating and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
According to described corresponding relation, proofread and correct the image that the projector place generates, for:
Calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place, generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
According to described coordinate conversion matrix, proofread and correct the image that the projector place generates.
5. projector's image correction system is characterized in that, comprising:
Imaging plane angle information acquiring unit is used to obtain the space angle information of imaging plane;
Projector's angle information acquiring unit is used to obtain the space angle information of projector;
Computing unit is used to calculate the space angle difference between described imaging plane and the described projector, the corresponding relation between the point on the image that obtains forming on point on the image that projector place generates and the imaging plane;
Image correction unit is used for according to described corresponding relation, proofreaies and correct the image that the projector place generates.
6. system according to claim 5 is characterized in that, described imaging plane angle information acquiring unit comprises:
First determines subelement with reference to angle, is used for determining the absolute reference angle;
First deflection angle obtains subelement, is used to obtain the deflection angle between described imaging plane and the absolute reference angle.
7. system according to claim 5 is characterized in that, described projector angle information acquiring unit comprises:
Second determines subelement with reference to angle, is used for determining the absolute reference angle;
Second deflection angle obtains subelement, is used to obtain the deflection angle between described projector and the absolute reference angle.
8. system according to claim 5 is characterized in that, also comprises:
The wireless signal Transmit-Receive Unit is used to realize communicating by letter between described imaging plane angle information acquiring unit and the described projector angle information acquiring unit.
9. according to each described system of claim 5 to 8, it is characterized in that described computing unit comprises:
Reference axis deflection angle computation subunit is used to calculate the deflection angle between each reference axis of rectangular coordinate system at each reference axis of rectangular coordinate system at described imaging plane place and described projector place;
Transition matrix generates subelement, is used to generate coordinate conversion matrix; Transformational relation between the coordinate of the point on the image that described coordinate conversion matrix is represented to form on the coordinate of the point on the image that projector place generates and the imaging plane;
Described image correction unit comprises:
The image rectification subelement is used for according to described coordinate conversion matrix, proofreaies and correct the image that the projector place generates.
10. system according to claim 6 is characterized in that, described first determines that with reference to angle subelement is an electronic compass, is used to respond to geographical locational direct north, to determine the absolute reference angle;
Described first deflection angle obtains subelement and comprises:
Obliquity sensor is used for each reference axis deflection angle with respect to the horizontal plane of the coordinate system at place, induction image forming plane;
Microprocessor is used to receive the dateout of described electronic compass and obliquity sensor, and each reference axis of coordinate system of calculating described imaging plane place is with respect to the deflection angle of described absolute reference angle.
11. system according to claim 7 is characterized in that, described second determines that with reference to angle subelement is an electronic compass, is used to respond to geographical locational direct north, to determine the absolute reference angle;
Described second deflection angle obtains subelement and comprises:
Obliquity sensor is used to respond to each reference axis deflection angle with respect to the horizontal plane of the coordinate system at projector place;
Microprocessor is used to receive the dateout of described electronic compass and obliquity sensor, and each reference axis of coordinate system of calculating described projector place is with respect to the deflection angle of described absolute reference angle.
12. a projector is characterized in that, comprises each described projector image correction system of claim 5 to 11.
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| CN104202585A (en) * | 2014-09-19 | 2014-12-10 | 联想(北京)有限公司 | Control method and device |
| WO2014205916A1 (en) * | 2013-06-24 | 2014-12-31 | 中兴通讯股份有限公司 | Image correction method for use in projection terminal, and projection terminal |
| CN104660947A (en) * | 2015-02-12 | 2015-05-27 | 苏州佳世达光电有限公司 | Projector and calibration method thereof |
| CN104902201A (en) * | 2015-06-25 | 2015-09-09 | 山东大学 | Projected image real-time correction method based on moving view point and special-shaped screen |
| CN108463999A (en) * | 2016-01-11 | 2018-08-28 | 罗伯特·博世有限公司 | Method for calibrating projection device and the method for running the projection device so calibrated |
| CN109151418A (en) * | 2018-10-09 | 2019-01-04 | 四川长虹电器股份有限公司 | A kind of system and method automatically correcting projected image geometric distortion |
| JP2020187358A (en) * | 2019-05-13 | 2020-11-19 | 中強光電股▲ふん▼有限公司 | Projection system, projection apparatus and calibrating method for displayed image thereof |
| CN112399158A (en) * | 2019-08-19 | 2021-02-23 | 深圳光峰科技股份有限公司 | Projection image calibration method and device and projection equipment |
| CN113542707A (en) * | 2021-07-15 | 2021-10-22 | 深圳市火乐科技发展有限公司 | Projection display method, projection display device, optical machine and projector |
| CN114449233A (en) * | 2020-10-30 | 2022-05-06 | 扬智科技股份有限公司 | Projection device and trapezoidal correction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014205916A1 (en) * | 2013-06-24 | 2014-12-31 | 中兴通讯股份有限公司 | Image correction method for use in projection terminal, and projection terminal |
| CN104202585A (en) * | 2014-09-19 | 2014-12-10 | 联想(北京)有限公司 | Control method and device |
| CN104660947A (en) * | 2015-02-12 | 2015-05-27 | 苏州佳世达光电有限公司 | Projector and calibration method thereof |
| CN104902201A (en) * | 2015-06-25 | 2015-09-09 | 山东大学 | Projected image real-time correction method based on moving view point and special-shaped screen |
| CN108463999B (en) * | 2016-01-11 | 2021-06-15 | 罗伯特·博世有限公司 | Method for calibrating a projection device and method for operating a projection device calibrated in this way |
| CN108463999A (en) * | 2016-01-11 | 2018-08-28 | 罗伯特·博世有限公司 | Method for calibrating projection device and the method for running the projection device so calibrated |
| CN109151418A (en) * | 2018-10-09 | 2019-01-04 | 四川长虹电器股份有限公司 | A kind of system and method automatically correcting projected image geometric distortion |
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Application publication date: 20110810 |