CN103957370B - Optical projection system and its trapezoidal distortion correction method with trapezoid correction function - Google Patents
Optical projection system and its trapezoidal distortion correction method with trapezoid correction function Download PDFInfo
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Abstract
On a kind of optical projection system and its trapezoidal distortion correction method with trapezoid correction function, the trapezoidal distortion correction method is included the present invention：Projection arrangement projects image, in forming the first picture shape on target projection face；Triggering adjustment element, with by the first picture Adjusting Shape as the second picture shape, and under original state between corresponding two successive value of the adjustment element at intervals of the first unit angle；Detecting set-up procedure, with the interval for deciding whether to change between corresponding two successive value of the adjustment element.The present invention detects set-up procedure by control unit, and must be increased the interval between corresponding two successive value of adjustment element is flexible or reduced according to set-up procedure, obtained by the existing hardware framework of optical projection system need not be changed and more accurately correct scale, shorten correction time, correction accuracy is improve, calibration result is optimized.
Description
Technical field
The present invention relates to a kind of optical projection system and its trapezoidal distortion correction method with trapezoid correction function, refer in particular to have
The optical projection system and its trapezoidal distortion correction method of automatic switchover unit angle.
Background technology
Projector has the advantages that picture is big, small volume, and projector has been substantially improved brightness and resolution in recent years, makes
Obtain projector and be increasingly popularized in the equipment such as office's bulletin and family's theater.Existing projector's product on the market all has trapezoidal
The function of correction, but the scale of keystone is most fine also about ± 1 degree, and still have paragraph poor per the gap between once,
If the angle required for user is between 1 degree, ± 1 degree of adjusted value cannot meet the demand of user.
The content of the invention
There is more accurate correction scale by it is an object of the invention to not change the existing hardware framework of optical projection system, improve
Correction accuracy and calibration result.
In order to achieve the above object, the present invention proposes a kind of trapezoidal distortion correction method of optical projection system, the trapezoidal distortion correction method
Comprising step A：Projection arrangement projects image, in forming the first picture shape on target projection face；Step B：Triggering adjustment element,
With by the first picture Adjusting Shape as the second picture shape, and under original state between corresponding two successive value of the adjustment element
At intervals of the first unit angle；Step C：The set-up procedure of step B is detected, to decide whether to change adjustment element correspondence
Two successive values between interval.
Used as optional technical scheme, step C is also included：If it is suitable along first at least two successive values occur during adjustment
Sequence switches successively, then change between corresponding two successive value of the adjustment element at intervals of the 3rd unit angle, the 3rd is single
Parallactic angle degree is more than first unit angle.
Used as optional technical scheme, step C is also included：Between changing between corresponding two successive value of the adjustment element
After being divided into the 3rd unit angle, continue to trigger the adjustment element, if it is suitable along the 4th to come across at least two successive values during adjustment
Sequence switches successively, and first order is with the 4th order conversely, then changing between corresponding two successive value of the adjustment element
At intervals of first unit angle.
Used as optional technical scheme, step C is also included：If along second between coming across two successive values during adjustment
Order is toggled, then change between corresponding two successive value of the adjustment element at intervals of the second unit angle, and continue to touch
The adjustment element after hair change until second picture is shaped as target shape, wherein, second unit angle less than this
One unit angle.
Used as optional technical scheme, step C is also included：Between changing between corresponding two successive value of the adjustment element
After being divided into second unit angle, continue to trigger the adjustment element, if carrying out switchback between coming across two successive values during adjustment
Change, then change between corresponding two successive value of the adjustment element at intervals of the 4th unit angle and continue to trigger adjustment unit
Part, the 4th unit angle is less than second unit angle.
Used as optional technical scheme, step C is also included：Between changing between corresponding two successive value of the adjustment element
After being divided into second unit angle, continue to trigger the adjustment element, if along the 3rd between coming across two successive values during adjustment
Order is toggled, and second order is with the 3rd order conversely, then changing between corresponding two successive value of the adjustment element
At intervals of first unit angle.
Used as optional technical scheme, the adjustment element is arranged on the projection arrangement, and the adjustment element is button；Or
The adjustment element is remote control, the remote control and the projection arrangement wireless connection.
The trapezoidal distortion correction method of optical projection system of the invention, by detecting set-up procedure and will adjust unit according to set-up procedure
Interval between corresponding two successive value of part is flexible must to be increased or be reduced, it is not necessary to change the existing hardware framework of optical projection system
Can obtain and more accurately correct scale, shorten correction time, improve correction accuracy, optimize calibration result.
Additionally, the present invention also proposes a kind of optical projection system with trapezoid correction function, the optical projection system is filled comprising projection
Put, adjustment element and control unit.Projection arrangement is used to project image, and in forming the first picture shape on target projection face；
It is the second picture shape, and the adjustment element corresponding two under original state that adjustment element is used for the first picture Adjusting Shape
Between successive value at intervals of the first unit angle；Control unit is used to detect the set-up procedure for putting on the adjustment element, with
Decide whether the interval changed between corresponding two successive value of the adjustment element.
As optional technical scheme, between corresponding two successive value of the adjustment element at intervals of first unit angle
When, if occur at least two successive values during adjustment switching successively along the first order, change the adjustment element corresponding two
Between successive value at intervals of the 3rd unit angle, the 3rd unit angle is more than first unit angle.
As optional technical scheme, between corresponding two successive value of the adjustment element at intervals of the 3rd unit angle
When, if at least two successive values are come across during adjustment switching successively along the 4th order, first order and the 4th is sequentially
Conversely, between then changing corresponding two successive value of the adjustment element at intervals of first unit angle.
As optional technical scheme, between corresponding two successive value of the adjustment element at intervals of first unit angle
When, if being toggled along the second order between two successive values are come across during adjustment, change two companies of adjustment element correspondence
Between continuous value at intervals of the second unit angle, and continue the adjustment element after triggering change until second picture is shaped as
Target shape, wherein, second unit angle is less than first unit angle.
As optional technical scheme, between corresponding two successive value of the adjustment element at intervals of second unit angle
When, if being toggled between two successive values are come across during adjustment, the projection arrangement changes two companies of adjustment element correspondence
Between continuous value at intervals of the 4th unit angle, the 4th unit angle is less than second unit angle.
As optional technical scheme, between corresponding two successive value of the adjustment element at intervals of second unit angle
When, if come across during adjustment between two successive values being toggled along the 3rd order, second order and the 3rd order phase
Instead, then change between corresponding two successive value of the adjustment element at intervals of first unit angle.
Used as optional technical scheme, the adjustment element is arranged on the projection arrangement, and the adjustment element is button；Or
The adjustment element is remote control, the remote control and the projection arrangement wireless connection.
Optical projection system of the invention, set-up procedure is detected by setting control unit and unit will be adjusted according to set-up procedure
Interval between corresponding two successive value of part is neatly increased or is reduced, it is not necessary to change the existing hardware framework of optical projection system
More reasonable, more accurate correction scale can be obtained, correction time is shortened, correction accuracy is improve, calibration result is optimized.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
Fig. 1 is the schematic diagram of optical projection system of the invention；
Fig. 2A is the schematic diagram of the first picture shape of the invention；
Fig. 2 B are the schematic diagram of the second picture shape of the invention；
Fig. 3 is the top view of projection arrangement of the invention；
Fig. 4 is the flow chart of trapezoidal distortion correction method of the invention.
Specific embodiment
The schematic diagram that Fig. 1, Fig. 2A and Fig. 2 B, Fig. 1 are optical projection system of the invention is refer to, Fig. 2A is of the invention first
The schematic diagram of picture shape, Fig. 2 B are the schematic diagram of the second picture shape of the invention.It is of the invention with trapezoid correction function
Optical projection system include projection arrangement 100, adjustment element 200 and control unit 300.Wherein, projection arrangement 100 is used to project shadow
Picture, and in forming the first picture shape 410 on target projection face 400；Adjustment element 200 is used to adjust the first picture shape 410
Whole is the second picture shape 420, and under original state between corresponding two successive value of adjustment element 200 at intervals of the first unit
Angle；Control unit 300 is used to detect the set-up procedure for putting on above-mentioned adjustment element 200, to decide whether change adjustment unit
Interval between corresponding two successive value of part 200.
In the present embodiment, Fig. 3 is refer to, Fig. 3 is the top view of projection arrangement of the invention, and adjustment element 200 is arranged at
On projection arrangement 100, adjustment element 200 is button.In practical operation, adjustment element 200 can also be remote control, and remote control
With the wireless connection of projection arrangement 100.Additionally, control device 300 also may be disposed on projection arrangement 100, may also set up in remote control
On device, user can voluntarily select according to actual conditions, be not limited with above-mentioned.
The trapezoidal distortion correction method of optical projection system of the invention is discussed in detail with reference to diagram.
Refer to Fig. 2A, Fig. 2 B and the flow chart that Fig. 4, Fig. 4 are trapezoidal distortion correction method of the invention.Projection system of the invention
The trapezoidal distortion correction method of system is included：
Step A：As shown in S100 in Fig. 4, the projection image of projection arrangement 100 is drawn in forming first on target projection face 400
Face shape 410, the first picture shape 410 is as shown in Figure 2 A；
Step B：As shown in S200 in Fig. 4, be adjusted to for the first picture shape 410 by user's triggering adjustment element 200
Second picture shape 420, as shown in Figure 2 B, and under original state between corresponding two successive value of adjustment element 200 at intervals of
First unit angle；
Step C：As shown in S300 in Fig. 4, the set-up procedure of detecting step B, to decide whether to change adjustment element 200 pairs
Interval between two successive values answered.
As shown in figure 3, in the present embodiment, adjustment element 200 is button, and adjustment element 200 includes the first button 210 and the
Two buttons 220, by taking the angle on projection arrangement 100 and ground as an example, set this angle as the first angle, under original state, press
First button 210, the first angle increases the first unit angle, presses the second button 220, then the first angle reduces the first unit angle
Degree.
In the present embodiment, when between corresponding two successive value of adjustment element 200 at intervals of the first unit angle, if adjusting
Occur at least two successive values during whole to switch successively along the first order, then change the adjustment element 200 corresponding two continuous
Between value at intervals of the 3rd unit angle, the 3rd unit angle is more than the first unit angle.In the present embodiment, the first unit angle
Degree is for example set to 1 °, presses the first button 210 once by taking first angle on projection arrangement 100 and ground as an example below, then and the
One angle increases 1 degree, presses the second button 220 once, then the first angle reduces 1 degree, if during adjustment, at least continuously pressing
Twice the first buttons 210 at least continuously press twice the second buttons 220, then by corresponding two successive value of adjustment element 200 it
Between interval the 3rd unit angle is changed to by the first unit angle, the 3rd unit angle is, for example, 2 °, i.e. adjustment element 200 pairs
Interval between two successive values answered can become big.
Interval between corresponding two successive value of adjustment element 200 is become into big considering is a little：If between two successive values
At intervals of the first unit angle when move to angle on target and need to press ten times the first buttons 210 or the second button 220 altogether, will
After interval becomes big, then need it is less press number of times can arrival angle on target, so, the person of being easy to use is quickly
It is adjusted to angle on target so that trimming process shortens, operates more convenient.
In the present embodiment, the interval between corresponding two successive value of adjustment element 200 is changed to by the first unit angle
After 3rd unit angle, continue to trigger adjustment element 200, if come across at least two successive values during adjustment making along the 4th order
Switch successively, the first order with the 4th order conversely, then between change corresponding two successive value of adjustment element 200 at intervals of the
One unit angle.In the present embodiment, if by the interval between corresponding two successive value of adjustment element 200 by the first unit angle more
When being changed to three unit angles, the first order is at least continuously to press twice the first buttons 210, then by adjustment element 200 pairs
When the first unit angle is more changeed back in interval between two successive values answered by third angle, the 4th order is at least continuously to press two
, certainly, also can be set as the first order at least continuously to press twice the second buttons 220 by lower second button 220, and suitable by the 4th
Sequence is set as at least continuously pressing twice the first buttons 210, and user can voluntarily determine according to actual needs.
In the present embodiment, it be a little that may be such that adjustment element that the 3rd unit angle is changed into considering for the first unit angle
Interval between 200 corresponding two successive values can increase and can also reduce, the flexibility during increase adjustment, convenient use person's
Operation.
In the present embodiment, the first unit angle is 1 °, and the 3rd unit angle is 2 °, if the first angle is X °, when adjustment unit
Between corresponding two successive value of part 200 at intervals of the first unit angle when, if adjustment during there are at least two successive value edges
First order switch successively, if the first order is at least continuously to press twice the first buttons 210, when the first unit angle more
While being changed to three unit angles, the first angle for setting now is (X+2) °.And if the first angle is X °, working as adjustment element
Between 200 corresponding two successive values at intervals of the 3rd unit angle, if there are at least two successive values along the 4th during adjustment
Order switches successively, and the 4th order is at least continuously to press twice the second buttons 220, then when the 3rd unit angle is changed to the
While one unit angle, setting the first angle now is still X °, and it is by the 3rd that the first angle being set into the reason for be still X °
Unit angle is changed to the first unit angle and is intended to be refined at the interval between two successive values, and is not intended to current
First angle reduces two the 3rd unit angles (reducing 4 °), therefore by between corresponding two successive value of adjustment element 200
Every after refinement, the first angle can still be set to X °.Certainly, user can be finely adjusted according to actual needs, be not limited with above-mentioned.
Certainly, in practical operation, to the first unit angle is changed into the 3rd unit angle, other modes can also be used
To realize, press the first button 210 to realize for example with length, and the 3rd unit angle is changed to the first unit angle, then
Press the second button 220 to realize using length.Vice versa, i.e. length presses the second button 220 to realize changing the first unit angle
It is the 3rd unit angle, and length presses the first button 210 to realize for the 3rd unit angle being changed to the first unit angle.User
Can according to actual needs determine to be changed to the first unit angle the mode of operation of the 3rd unit angle, be not limited with above-mentioned.This
Outward, in the present embodiment, the first unit angle is set as 1 °, and the 3rd unit angle is set as 2 °, in practical operation, and user also may be used
Voluntarily determine as needed, be not limited.
In the present embodiment, when between corresponding two successive value of adjustment element 200 at intervals of the first unit angle, if adjustment
During come across and toggled along the second order between two successive values, then change corresponding two successive value of adjustment element 200 it
Between at intervals of the second unit angle, and continue triggering change after adjustment element 200 until the second picture be shaped as target shape
Shape, wherein, the second unit angle is less than the first unit angle.If for example, the appearance that is in course of adjustment first presses first
Button 210, then press the second button 220, then press the first button 210, i.e., first increase 1 ° by angle, then by angle
Reduce 1 °, and again by 1 ° of angle increase, if control unit 300 detects such set-up procedure, change adjustment element 200 pairs
Between two successive values answered at intervals of the second unit angle, the second unit angle is, for example, 0.25 °.In the present embodiment, second
Order increases again for angle first increases to reduce again, and in practical operation, the second order also can again reduce for angle first reduces to increase again,
Or second order increase again etc. first to increase to reduce again or first reduce, user can be voluntarily true according to actual needs
It is fixed.
In practical operation, according to the custom flow of operation, if user adjusts general back and forth between two adjacent intervals
The numerical value that representative is wanted to reach is trapezoidal distortion correction method of the invention therebetween, when control unit 300 detects user
Have when adjustment back and forth is done between adjacent angular, automatically will further be cut unit angle, convenient use person is more smart
Really carry out keystone.
In the present embodiment, between change corresponding two successive value of adjustment element 200 at intervals of the second unit angle after, after
Continuous triggering adjustment element 200, if being toggled between two successive values are come across during adjustment, changes adjustment element 200 pairs
Between two successive values answered at intervals of the 4th unit angle and continue to trigger adjustment element 200, the 4th unit angle is less than the
Two unit angles.It is similar to the above, if occurring first pressing the first button 210 for example, being in course of adjustment, then press
Second button 220, and press the first button 210 again, i.e., angle is first increased 0.25 °, then by 0.25 ° of angle reduction, and
Angle is increased 0.25 ° again, if control unit 300 detects such set-up procedure, adjustment element 200 corresponding two is changed
Between successive value at intervals of the 4th unit angle, the 4th unit angle is, for example, 0.05 °.Certainly, also can be in control unit 300
Detect and first reduce angle, then angle is increased, but when angle is reduced again, change adjustment element 200 corresponding two is continuous
Between value at intervals of the 4th unit angle.Due to by the cut-space between corresponding two successive value of adjustment element 200 into more
Small angle so that adjustment is more fine, and Adjustment effect is more.
In the present embodiment, between change corresponding two successive value of adjustment element 200 at intervals of the second unit angle after, after
Continuous triggering adjustment element 200, if being toggled along the 3rd order between two successive values are come across during adjustment, the second order with
3rd order conversely, then between change corresponding two successive value of adjustment element 200 at intervals of the first unit angle.The present embodiment
In, if the second order reduces and increase again again for angle first increases, i.e., the first button 210 is first pressed, then press
Two buttons 220, and press the first button 210 again, then the 3rd order increases and reduces again again for angle first reduces, i.e., first press
Make a movement the second button 220, then presses the first button 210, and presses the second button 220 again.Certain second order
Also can again increase and reduce again for angle first reduces, the 4th order correspondent transform.In practical operation, the second order can also be
First increase to reduce or first reduce to increase or grow to press the first button 210 or grow again again and press second button 220 etc., user can
Voluntarily determine according to actual needs.
In the present embodiment, the interval between corresponding two successive value of adjustment element 200 is changed to by the second unit angle
4th unit angle is considered with to be changed to considering for the second unit angle by the first unit angle similar, when detecting user
When toggling adjustment between adjacent angular, then unit angle is done into further cutting refinement so that correction scale is more
Precision, further increases calibration result.
In practical operation, similar to by the interval between corresponding two successive value of adjustment element 200 by the second unit angle
The first unit angle is changed to, when between corresponding two successive value of adjustment element 200 at intervals of four unit angles, also may be used
By corresponding set-up procedure, the interval between corresponding two successive value of adjustment element 200 is changed to by the 4th unit angle
Second unit angle, user can according to actual needs determine corresponding set-up procedure.
With adjustment element 200 for button carries out example in the present embodiment, in practical operation, adjustment element 200 also can be it
He, such as remote control etc. is not limited with above-mentioned.
Optical projection system of the invention and trapezoidal distortion correction method, by detecting set-up procedure, and will adjust according to set-up procedure
Interval between corresponding two successive value of element 200 is neatly increased or is reduced, it is not necessary to change existing hardware framework i.e.
More reasonable, more accurate correction scale can be obtained, correction time is shortened, correction accuracy is improve, calibration result is optimized.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Knowing those skilled in the art can make various corresponding changes and deformation, but these corresponding changes and deformation according to the present invention
The protection domain of appended claims of the invention should all be belonged to.
Claims (14)
1. a kind of trapezoidal distortion correction method of optical projection system, it is characterised in that the trapezoidal distortion correction method is included：
Step A：Projection arrangement projects image, in forming the first picture shape on target projection face；
Step B：Triggering adjustment element, with by the first picture Adjusting Shape as the second picture shape, and the tune under original state
Between corresponding two successive value of whole element at intervals of the first unit angle；And
Step C：The set-up procedure of step B is detected, to decide whether to change between corresponding two successive value of the adjustment element
Interval.
2. trapezoidal distortion correction method according to claim 1, it is characterised in that：Step C is also included：
If occurring at least two successive values during adjustment to switch successively along the first order, the adjustment element corresponding two is changed
Between successive value at intervals of the 3rd unit angle, the 3rd unit angle is more than first unit angle, and first order is
The projection arrangement is continuous with the angle on ground to be increased or is continuously reduced.
3. trapezoidal distortion correction method according to claim 2, it is characterised in that：Step C is also included：
Change between corresponding two successive value of the adjustment element at intervals of the 3rd unit angle after, continue to trigger adjustment unit
Part, if at least two successive values are come across during adjustment switching successively along the 4th order, first order and the 4th is sequentially
Conversely, between then changing corresponding two successive value of the adjustment element at intervals of first unit angle.
4. trapezoidal distortion correction method according to claim 1, it is characterised in that：Step C is also included：
If being toggled along the second order between two successive values are come across during adjustment, the adjustment element corresponding two is changed
Between successive value at intervals of the second unit angle, and continue the adjustment element after triggering change until the second picture shape
It is target shape, wherein, second unit angle is less than first unit angle；
Second order is that the projection arrangement first increases to reduce again and increases again with the angle on ground；Or second order is the throwing
Image device first reduces to increase again and reduces again with the angle on ground；Or the angle elder generation that second order is the projection arrangement and ground
Increase reduces again；Or second order is that the projection arrangement first reduces with the angle on ground and increases again.
5. trapezoidal distortion correction method according to claim 4, it is characterised in that：Step C is also included：
Change between corresponding two successive value of the adjustment element at intervals of second unit angle after, continue to trigger adjustment unit
Part, if being toggled between two successive values are come across during adjustment, changes between corresponding two successive value of the adjustment element
At intervals of the 4th unit angle and continue trigger the adjustment element, the 4th unit angle be less than second unit angle.
6. trapezoidal distortion correction method according to claim 4, it is characterised in that：Step C is also included：
Change between corresponding two successive value of the adjustment element at intervals of second unit angle after, continue to trigger adjustment unit
Part, if come across during adjustment between two successive values being toggled along the 3rd order, second order and the 3rd order phase
Instead, then change between corresponding two successive value of the adjustment element at intervals of first unit angle.
7. trapezoidal distortion correction method according to claim 1, it is characterised in that：The adjustment element is arranged at the projection arrangement
On, the adjustment element is button；Or the adjustment element is remote control, the remote control and the projection arrangement wireless connection.
8. a kind of optical projection system with trapezoid correction function, it is characterised in that the optical projection system is included：
Projection arrangement, for projecting image, and in forming the first picture shape on target projection face；
Adjustment element, for being the second picture shape, and adjustment element pair under original state by the first picture Adjusting Shape
Between two successive values answered at intervals of the first unit angle；
Control unit, the set-up procedure of the adjustment element is put on for detecting, to decide whether to change adjustment element correspondence
Two successive values between interval.
9. optical projection system according to claim 8, it is characterised in that：Between between corresponding two successive value of the adjustment element
When being divided into first unit angle, if occur at least two successive values during adjustment switching successively along the first order, change
Between corresponding two successive value of the adjustment element at intervals of the 3rd unit angle, the 3rd unit angle is more than first unit
Angle, first order is that the projection arrangement is continuous with the angle on ground to be increased or is continuously reduced.
10. optical projection system according to claim 9, it is characterised in that：Between corresponding two successive value of the adjustment element
During at intervals of three unit angles, if at least two successive values are come across during adjustment switching successively along the 4th order, this
One order with the 4th order conversely, between then changing corresponding two successive value of the adjustment element at intervals of the first unit angle
Degree.
11. optical projection systems according to claim 8, it is characterised in that：Between corresponding two successive value of the adjustment element
During at intervals of first unit angle, if being toggled along the second order between two successive values are come across during adjustment, more
Change the adjustment element correspondence two successive values between at intervals of the second unit angle, and continue triggering change after the adjustment element
Until second picture is shaped as target shape, wherein, second unit angle is less than first unit angle；Second order
Increase again for the projection arrangement first increases to reduce again with the angle on ground；Or second order is the projection arrangement and ground
Angle first reduces to increase again and reduces again；Or second order is that the projection arrangement first increases with the angle on ground and reduces again；Or
Person second order is that the projection arrangement first reduces with the angle on ground and increases again.
12. optical projection systems according to claim 11, it is characterised in that：Between corresponding two successive value of the adjustment element
During at intervals of second unit angle, if being toggled between two successive values are come across during adjustment, the projection arrangement is repaiied
Change between the adjustment element two successive values of correspondence at intervals of the 4th unit angle, the 4th unit angle is less than second unit
Angle.
13. optical projection systems according to claim 11, it is characterised in that：Between corresponding two successive value of the adjustment element
During at intervals of second unit angle, if come across during adjustment between two successive values being toggled along the 3rd order, this
Two orders with the 3rd order conversely, between then changing corresponding two successive value of the adjustment element at intervals of the first unit angle
Degree.
14. optical projection systems according to claim 8, it is characterised in that：The adjustment element is arranged on the projection arrangement, should
Adjustment element is button；Or the adjustment element is remote control, the remote control and the projection arrangement wireless connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410123936.3A CN103957370B (en) | 2014-03-28 | 2014-03-28 | Optical projection system and its trapezoidal distortion correction method with trapezoid correction function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410123936.3A CN103957370B (en) | 2014-03-28 | 2014-03-28 | Optical projection system and its trapezoidal distortion correction method with trapezoid correction function |
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| Publication Number | Publication Date |
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| CN103957370B true CN103957370B (en) | 2017-06-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1629665A1 (en) * | 2003-06-02 | 2006-03-01 | Casio Computer Co., Ltd. | Captured image projection apparatus and captured image correction method |
| CN101887210A (en) * | 2009-05-12 | 2010-11-17 | 日立民用电子株式会社 | Projection plate device and its employed transmission-type screen |
| CN102183870A (en) * | 2011-04-29 | 2011-09-14 | 广州视声电子科技有限公司 | Method and system for correcting distorted projector image and projector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9607363B2 (en) * | 2012-06-19 | 2017-03-28 | Ricoh Company, Ltd. | Projector, trapezoidal distortion correction method, and storage medium storing trapezoidal distortion correction program |
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2014
- 2014-03-28 CN CN201410123936.3A patent/CN103957370B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1629665A1 (en) * | 2003-06-02 | 2006-03-01 | Casio Computer Co., Ltd. | Captured image projection apparatus and captured image correction method |
| CN101887210A (en) * | 2009-05-12 | 2010-11-17 | 日立民用电子株式会社 | Projection plate device and its employed transmission-type screen |
| CN102183870A (en) * | 2011-04-29 | 2011-09-14 | 广州视声电子科技有限公司 | Method and system for correcting distorted projector image and projector |
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| CN103957370A (en) | 2014-07-30 |
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