CN106454294A - Projector screen correction method and projector - Google Patents
Projector screen correction method and projector Download PDFInfo
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- CN106454294A CN106454294A CN201610913367.1A CN201610913367A CN106454294A CN 106454294 A CN106454294 A CN 106454294A CN 201610913367 A CN201610913367 A CN 201610913367A CN 106454294 A CN106454294 A CN 106454294A
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- projector
- angle information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
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- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Projection Apparatus (AREA)
Abstract
The invention relates to a projector screen correction method and a projector. The projector screen correction method comprises the following steps: obtaining angle information of the projector; adjusting the angle information; and performing keystone correction on the projector screen according to the adjusted angle information. According to the projector screen correction method and the projector provided by the invention, the angle information of the projector is adjusted, thereby expanding the application angle range of an ordinary keystone correction method, increasing the application scenes of the projector and greatly improving the user experience.
Description
Technical field
The present invention relates to Digital Image Processing and display technology field, more particularly, to a kind of projector's frame correction method and
Projector.
Background technology
Develop rapidly with scientific and technical, projector's more and more universal being used in the life of people.Throw
The operation principle that shadow owner wants is all to send light by light source, by a series of optical lighting system, will be uniform for the light of light source
It is irradiated on display chip, and signal realizes color range and GTG by Circuits System on display chip, show image, this
Afterwards by projection front end projection lens by the image enlarging projection on display chip to corresponding screen.Projector makes daily
With during, guarantee drop shadow effect when plane and projection screen that its light engine is located are at a right angle, if cannot protect
Demonstrate,prove the vertical of the two, picture will produce trapezoidal distortion.This is because, the image of projector's acquired original or video are square
Shape, during carrying out secondary synthesis to single or multiple rectangular images or video, generally requires the image to original rectangular
Or video carries out keystone transformations, so to reach the demand meeting different texture synthesis.In order to solve this problem, at present generally all
It is to be corrected using keystone method, by keystone it is ensured that picture becomes the rectangle of standard.Keystone generally has two
The method of kind：Optics keystone and digital keystone, optics keystone refers to reach by adjusting the physical location of camera lens
To the trapezoidal purpose of adjustment, another kind of number keystone is to realize keystone by the method for software.But existing ladder
All there is angle restricted problem in shape bearing calibration, specifically, in general existing trapezoidal distortion correction method provides only ± 40 degree
Within correction support, when equipment hoisting or projection screen are more than ± 40 degree for ceiling or ground etc. with metope angle
When, picture can lose the support of keystone, and therefore, the picture being finally presented on described projection screen can be in serious ladder
Shape form, user cannot accurately know the content of display on screen, Consumer's Experience extreme difference.Therefore, how to expand keystone
The angular range of application, increases the application scenarios of projector, is technical problem urgently to be resolved hurrily at present.
Content of the invention
The present invention provides a kind of projector frame correction method and projector, in order to solve the angle model of keystone support
Enclose less problem, improve Consumer's Experience.
In order to solve the above problems, the invention provides a kind of projector frame correction method, comprise the steps：Obtain
The angle information of projector；Adjust described angle information；According to adjusted angle information, ladder is carried out to described projector picture
Shape corrects.
Preferably, the described step adjusting described angle information includes：Described projector is judged according to described angle information
Whether it is in inversion or lifting state, if so, then described angle information is added 180 degree or deduct 180 degree.
Preferably, when described projector be in inversion or lifting state when, described angle information be more than or equal to 140 degree and
Less than or equal to 220 degree.
Preferably, the described step adjusting described angle information includes：Judge that projection screen is according to described angle information
If so, described angle information is then added 90 degree or deducts 270 degree by the no surface positioned at described projector or oblique upper.
Preferably, when described projection screen is located at surface or the oblique upper of described projector, described angle information is
More than or equal to 50 degree and less than or equal to 130 degree.
Preferably, the described step adjusting described angle information includes：Judge that projection screen is according to described angle information
If so, described angle information is then added 270 degree or deducts 90 degree by the no underface positioned at described projector or obliquely downward..
Preferably, when described projection screen is located at underface or the obliquely downward of described projector, described angle information is
More than or equal to 230 degree and less than or equal to 310 degree.
Present invention also offers a kind of projector, including means for correcting, described means for correcting includes：Acquisition module, is used for
Obtain the angle information of projector；Adjusting module, for adjusting described angle information；Keystone module, for according to through adjusting
Whole angle information, carries out keystone to projector's picture.
Preferably, described adjusting module includes judging unit, and described judging unit is used for being sentenced according to described angle information
Whether disconnected described projector is in inversion or lifting state, if so, then described angle information is added 180 degree or deducts 180 degree.
Preferably, when described projector be in inversion or lifting state when, described angle information be more than or equal to 140 degree and
Less than or equal to 220 degree.
Preferably, described adjusting module includes judging unit, and described judging unit is used for being sentenced according to described angle information
Whether disconnected projection screen is located at surface or the oblique upper of described projector, if so, then by described angle information add 90 degree or
Deduct 270 degree.
Preferably, when described projection screen is located at surface or the oblique upper of described projector, described angle information is
More than or equal to 50 degree and less than or equal to 130 degree.
Preferably, described adjusting module includes judging unit, and described judging unit is used for being sentenced according to described angle information
Whether disconnected projection screen is located at underface or the obliquely downward of described projector, if so, then by described angle information add 270 degree or
Deduct 90 degree.
Preferably, when described projection screen is located at underface or the obliquely downward of described projector, described angle information is
More than or equal to 230 degree and less than or equal to 310 degree.
Projector's frame correction method and projector that the present invention provides, by adjusting the angle information of projector, expand
The angular range of common trapezoidal distortion correction method application, increases the application scenarios of projector, high degree improve use
Family is experienced.
Brief description
Accompanying drawing 1 is projector's frame correction method flow chart of the specific embodiment of the invention；
Accompanying drawing 2 is the means for correcting structural representation in the projector of the specific embodiment of the invention.
Specific embodiment
The projector's the frame correction method below in conjunction with the accompanying drawings present invention being provided and the specific embodiment of projector are done
Describe in detail.
The invention provides a kind of projector frame correction method and projector, accompanying drawing 1 is the specific embodiment of the invention
Bearing calibration flow chart, accompanying drawing 2 is the means for correcting structural representation in the projector of the specific embodiment of the invention.As figure
Shown in 1, projector's frame correction method that the present invention provides comprises the steps：
Step S11, obtains the angle information of projector.For the ease of keystone, the present invention are carried out to projector's picture
By arranging means for correcting in described projector, the angle information of described projector is corrected.Described means for correcting
Including acquisition module 21, the angle information to obtain projector for the described acquisition module 21.Described acquisition module 21 can include setting
It is placed in the one or more sensors within described projector, described sensor can be three dimension acceleration sensor, gravity biography
Sensor or gyro sensor, described sensor can detect, determine described projector according to a default three-dimensional system of coordinate
Angle information, for example can measure the displacement of projector so that it is determined that the angle of described projector by arranging acceleration transducer
Degree information.Wherein, because described gravity sensor (G-Sensor) sensitivity is higher, multiple occasions are gone for, preferably institute
State acquisition module 21 and include multiple gravity sensors.When obtaining the angle information of projector using multiple gravity sensors, can
To be respectively provided with a gravity sensor at the three of projector angles, it is respectively induced three angles angle of inclination with respect to the horizontal plane,
Such that it is able to obtain the angle information of the entirety of described projector.Those skilled in the art can arrange sensing according to actual needs
The type of device and installation site, as long as the angle information of described projector can accurately be obtained.
Step S12, adjusts described angle information.In order to expand the angular range of common trapezoidal distortion correction method application,
The method that the present invention takes is that actual angle information is adjusted the angle so that obtaining after described adjustment to described projector
Degree can apply keystone.
In order to expand the range of application of described keystone so that described projector be inverted or lifting state when
Drop shadow effect is more preferably it is preferred that the described step adjusting described angle information includes：Described throwing is judged according to described angle information
Whether shadow machine is in inversion or lifting state, if so, then described angle information is added 180 degree or deducts 180 degree.Wherein, when
When described projector is in inversion or lifting state, described angle information is more than or equal to 140 degree and to be less than or equal to 220 degree.This
Sample, by the angle information being inverted or lift during state is added 180 degree or deducts 180 degree, then can be by described projector
Angle information adjusts in the range of ± 40 degree such that it is able to be corrected to projector's picture, improves the aobvious of projector's picture
Show effect.
In order to expand the range of application of described keystone, so that described projection screen is just being located at described projector
Drop shadow effect when top or oblique upper is also preferably it is preferred that the described step adjusting described angle information includes：According to described
Angle information judges whether projection screen is located at surface or the oblique upper of described projector, if so, then by described angle information
Plus 90 degree or deduct 270 degree.Wherein, when described projection screen is located at surface or the oblique upper of described projector, described
Angle information is more than or equal to 50 degree and to be less than or equal to 130 degree.So, by being located at projection screen directly over described projector
Or the angle information during state of oblique upper adds 90 degree or deducts 270 degree, then the angle information of described projector can be adjusted
To in the range of ± 40 degree such that it is able to be corrected to projector's picture, improve the display effect of projector's picture.
In order to expand the range of application of described keystone, so that described projection screen is just being located at described projector
Drop shadow effect when lower section or obliquely downward is also preferably it is preferred that the described step adjusting described angle information includes：According to described
Angle information judges whether projection screen is located at underface or the obliquely downward of described projector, if so, then by described angle information
Plus 270 degree or deduct 90 degree.Wherein, when described projection screen is located at underface or the obliquely downward of described projector, described
Angle information is more than or equal to 230 degree and to be less than or equal to 310 degree.So, by by projection screen be located at described projector just under
Angle information when side or obliquely downward state adds 270 degree or deducts 90 degree, then can adjust the angle information of described projector
Such that it is able to be corrected to projector's picture in the range of whole to ± 40 degree, improve the display effect of projector's picture.
Step S13, according to adjusted angle information, carries out keystone to described projector picture.When by described throwing
The angle information of shadow machine is adjusted afterwards it is possible to carry out keystone to projector's picture.Wherein, described trapezoidal distortion correction method
For existing common trapezoidal distortion correction method, will not be described here.
Projector's frame correction method that the present invention provides, by adjusting the angle information of projector, expands common
The angular range of trapezoidal distortion correction method application, increases the application scenarios of projector, high degree improve Consumer's Experience.
Moreover, present invention also offers a kind of projector, described projector includes means for correcting, described means for correcting
For correcting projector's picture, as shown in Fig. 2 means for correcting of the present invention includes：Acquisition module 21, adjusting module 23 and
Keystone module 22.
Described acquisition module 21, for obtaining the angle information of projector.Trapezoidal for the ease of carrying out to projector's picture
Correction, the means for correcting that the present invention provides obtains the angle information of projector by arranging acquisition module 21.Described acquisition mould
Block 21 can include being arranged at the one or more sensors within described projector, and described sensor can be three-dimensional acceleration
Sensor, gravity sensor or gyro sensor, described sensor can detect according to a default three-dimensional system of coordinate, really
The angle information of fixed described projector, for example, can measure the displacement of projector so that it is determined that throwing by arranging acceleration transducer
The angle information of shadow machine.Wherein, because described gravity sensor (G-Sensor) sensitivity is higher, multiple fields are gone for
Close, preferably described acquisition module 21 includes multiple gravity sensors.When the direction obtaining projector using multiple gravity sensors
During information, a gravity sensor can be respectively provided with the three of projector angle, be respectively induced three angles with respect to the horizontal plane
Angle of inclination, such that it is able to obtain the angle information of described projector entirety.Those skilled in the art can be according to actual needs
The type of setting sensor and installation site, as long as the angle information of described projector can accurately be obtained.
Described adjusting module 23, for adjusting described angle information.In order to expand common trapezoidal distortion correction method application
Angular range, the method that the present invention takes is, described adjusting module 23 enters line translation and adjusts to the angle information of described projector
Whole so that after described adjustment the angle information that obtains can apply keystone.
In order to expand the range of application of described keystone, so that when described projector is in inversion or lifting state
Drop shadow effect more preferably it is preferred that also including judging unit 231 in described adjusting module 23, described judging unit 231 be used for root
Judge whether described projector is in inversion or lifting state according to described angle information, if so, then described angle information is added
180 degree or deduct 180 degree.Wherein, when described projector be in inversion or lifting state when, described angle information be more than or equal to
140 degree and be less than or equal to 220 degree.So, by adding 180 degree or deducting 180 the angle information being inverted or lift during state
Degree, then can adjust in the range of ± 40 degree the angle information of described projector such that it is able to carry out school to projector's picture
Just, improve the display effect of projector's picture.
In order to expand the range of application of described keystone, so that described projection screen is just being located at described projector
Top or drop shadow effect during oblique upper, also preferably it is preferred that described adjusting module 23 also includes judging unit 231, described are sentenced
Disconnected unit 231 is used for judging whether projection screen is located at surface or the oblique upper of described projector according to described angle information,
If so, then described angle information is then added 90 degree by described angle information or deduct 270 degree.Wherein, when described projection screen
Positioned at surface or the oblique upper of described projector when, described angle information be more than or equal to 50 degree and be less than or equal to 130 degree.This
Sample, adds 90 degree by the angle information being located at projection screen directly over described projector or during the state of oblique upper or deducts
270 degree, then the angle information of described projector can be adjusted in the range of ± 40 degree such that it is able to carry out to projector's picture
Correction, improves the display effect of projector's picture.
In order to expand the range of application of described keystone, so that described projection screen is just being located at described projector
Lower section or drop shadow effect during obliquely downward, also preferably it is preferred that described adjusting module 23 also includes judging unit 231, described are sentenced
Disconnected unit 231 is used for judging whether projection screen is located at the underface of described projector according to described angle information, if so, then will
Described angle information adds 270 degree or deducts 90 degree.Wherein, when described projection screen is located at the underface of described projector or oblique
During lower section, described angle information is more than or equal to 230 degree and to be less than or equal to 310 degree.So, described by being located at projection screen
The angle information during state of immediately below projector or obliquely downward adds 270 degree or deducts 90 degree, then can be by described projector
Angle information adjusts in the range of ± 40 degree such that it is able to be corrected to projector's picture, improves the aobvious of projector's picture
Show effect.
Described keystone module 24, for according to adjusted angle information, carrying out keystone to projector's picture.
It is possible to keystone is carried out to projector's picture after the angle information of described projector is adjusted.Wherein, described ladder
Shape bearing calibration is existing common trapezoidal distortion correction method, will not be described here.
The projector that the present invention provides, by adjusting the angle information of projector, expands common trapezoidal distortion correction method
The angular range of application, increases the application scenarios of projector, high degree improve Consumer's Experience.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (14)
1. a kind of projector frame correction method is it is characterised in that comprise the steps：
Obtain the angle information of projector；
Adjust described angle information；
According to adjusted angle information, keystone is carried out to described projector picture.
2. projector according to claim 1 frame correction method is it is characterised in that described adjustment described angle information
Step includes：Judge whether described projector is in inversion or lifting state according to described angle information, if so, then by described angle
Degree information adds 180 degree or deducts 180 degree.
3. projector according to claim 2 frame correction method it is characterised in that when described projector be in inversion or
During lifting state, described angle information is more than or equal to 140 degree and to be less than or equal to 220 degree.
4. projector according to claim 1 frame correction method is it is characterised in that described adjustment described angle information
Step includes：Judge whether projection screen is located at surface or the oblique upper of described projector according to described angle information, if so,
Then described angle information is added 90 degree or deduct 270 degree.
5. projector according to claim 4 frame correction method is it is characterised in that work as described projection screen positioned at described
When the surface of projector or oblique upper, described angle information is more than or equal to 50 degree and to be less than or equal to 130 degree.
6. projector according to claim 1 frame correction method is it is characterised in that described adjustment described angle information
Step includes：Judge whether projection screen is located at underface or the obliquely downward of described projector according to described angle information, if so,
Then described angle information is added 270 degree or deduct 90 degree.
7. projector according to claim 6 frame correction method is it is characterised in that work as described projection screen positioned at described
When the underface of projector or obliquely downward, described angle information is more than or equal to 230 degree and to be less than or equal to 310 degree.
8. a kind of projector is it is characterised in that include means for correcting, described means for correcting includes：
Acquisition module, for obtaining the angle information of projector；
Adjusting module, for adjusting described angle information；
Keystone module, for according to adjusted angle information, carrying out keystone to projector's picture.
9. projector according to claim 8 is it is characterised in that described adjusting module includes judging unit, described sentences
Disconnected unit is used for judging whether described projector is in inversion or lifting state according to described angle information, if so, then will be described
Angle information adds 180 degree or deducts 180 degree.
10. projector according to claim 9 it is characterised in that when described projector be in inversion or lifting state when,
Described angle information is more than or equal to 140 degree and to be less than or equal to 220 degree.
11. projectors according to claim 8, it is characterised in that described adjusting module includes judging unit, described are sentenced
Disconnected unit is used for judging whether projection screen is located at surface or the oblique upper of described projector according to described angle information, if
It is then described angle information to be added 90 degree or deduct 270 degree.
12. projectors according to claim 11 are just being located at described projector it is characterised in that working as described projection screen
When top or oblique upper, described angle information is more than or equal to 50 degree and to be less than or equal to 130 degree.
13. projectors according to claim 8, it is characterised in that described adjusting module includes judging unit, described are sentenced
Disconnected unit is used for judging whether projection screen is located at underface or the obliquely downward of described projector according to described angle information, if
It is then described angle information to be added 270 degree or deduct 90 degree.
14. projectors according to claim 13 are just being located at described projector it is characterised in that working as described projection screen
When lower section or obliquely downward, described angle information is more than or equal to 230 degree and to be less than or equal to 310 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610913367.1A CN106454294A (en) | 2016-10-20 | 2016-10-20 | Projector screen correction method and projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610913367.1A CN106454294A (en) | 2016-10-20 | 2016-10-20 | Projector screen correction method and projector |
Publications (1)
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| CN106454294A true CN106454294A (en) | 2017-02-22 |
Family
ID=58176388
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| CN201610913367.1A Pending CN106454294A (en) | 2016-10-20 | 2016-10-20 | Projector screen correction method and projector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343186A (en) * | 2017-06-13 | 2017-11-10 | 北京小米移动软件有限公司 | Projector equipment control method and device |
| CN109272779A (en) * | 2018-11-05 | 2019-01-25 | 浙江工商职业技术学院 | A kind of applying electronic teaching aid |
| CN109618141A (en) * | 2018-12-24 | 2019-04-12 | 北京易创盈互联网科技有限公司 | A kind of ultrashort out-of-focus projection's method and device of passenger's new media |
| WO2019196433A1 (en) * | 2018-04-12 | 2019-10-17 | 深圳光峰科技股份有限公司 | Method and device for projection picture correction, mobile device, and storage medium |
| CN112689133A (en) * | 2020-11-30 | 2021-04-20 | 中国科学院深圳先进技术研究院 | Image correction system and method |
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| CN104956665A (en) * | 2013-01-28 | 2015-09-30 | Jvc建伍株式会社 | Projection apparatus, image correction method, and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107343186A (en) * | 2017-06-13 | 2017-11-10 | 北京小米移动软件有限公司 | Projector equipment control method and device |
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| CN109618141A (en) * | 2018-12-24 | 2019-04-12 | 北京易创盈互联网科技有限公司 | A kind of ultrashort out-of-focus projection's method and device of passenger's new media |
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Application publication date: 20170222 |