CN102183870A - Method and system for correcting distorted projector image and projector - Google Patents
Method and system for correcting distorted projector image and projector Download PDFInfo
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- CN102183870A CN102183870A CN2011101096050A CN201110109605A CN102183870A CN 102183870 A CN102183870 A CN 102183870A CN 2011101096050 A CN2011101096050 A CN 2011101096050A CN 201110109605 A CN201110109605 A CN 201110109605A CN 102183870 A CN102183870 A CN 102183870A
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Abstract
The invention provides a method and a system for correcting a distorted projector image and a projector. The method comprises the following steps of: acquiring position data of the projector relative to a triaxial space from a locating device of the triaxial space arranged on the projector after the projector is switched on; comparing the detected position data with reference position data and acquiring position offset of the projector; calculating an adjustment position and an adjustment angle of a trapezoid optical correction device of the projector according to the position offset; and regulating the trapezoid optical correction device according to results. By the method and the system for correcting the distorted projector image and the projector, the distorted image caused by the position offset of the projector can be automatically, conveniently and accurately corrected.
Description
Technical field
The present invention relates to the image distortion correction technical field of projector, relate in particular to a kind of projector image distortion correction method and system thereof, and a kind of projector with this image distortion correction system.
Background technology
At present, the keystone of known projector has two kinds of methods usually: optics keystone and digital keystone, the optics keystone is meant that the physical location by the optical lens (optics keystone device) of adjusting projector reaches the trapezoidal purpose of adjustment projected image, another kind of digital keystone is that the method by software realizes keystone, comparatively speaking, the application of optics keystone is comparatively extensive.
In the projector of applied optics keystone, no matter be LCD (liquid crystal) projector or DLP (rear-projection) projector, all being the optics keystone device of regulating projector by button on the manual operation projector shell or telepilot, is the rectangle projected image of rule thereby the conical light that the hernia lamp produces is proofreaied and correct.Yet manual operation is very inconvenient, is particularly just putting not in projector, and under the unstable situation, after manual adjustment was good, moving once more of projector will make original adjustment lose efficacy, and needs manual adjustments once more; And along with the inefficacy of button can take place in the growth of instrument service time, perhaps telepilot mishap such as is lost and is caused and can't adjust, and this all can bring certain trouble to the user.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of can be automatically, convenient and projector's image distortion correction method that pattern distortion that exactly projector's offset is caused is proofreaied and correct.
A kind of projector image distortion correction method comprises: obtain the position data of projector with respect to spatial triaxial from the spatial triaxial locating device that is arranged in the projector; The position data and the reference location data that detect are compared, obtain the position offset of projector; Calculate the adjustment position and the angle of the optics keystone device of described projector according to described position offset; According to result of calculation described optics keystone device is adjusted.
The technical problem to be solved in the present invention also be to provide a kind of can be automatically, convenient and image distortion correction system of projector that pattern distortion that exactly projector's offset is caused is proofreaied and correct.
Image distortion correction system of a kind of projector comprises: be used to detect the spatial triaxial locating device of projector with respect to the position data of spatial triaxial; Be used for regulating the regulating device of the optics keystone device of projector according to steering order; And, be used for calculating the adjustment position and the angle of described optics keystone device according to the position data that described spatial triaxial locating device detects, described regulating device is sent the control module of steering order.
It is a kind of owing to offset causes projected image when distortion that the technical problem to be solved in the present invention also is to provide, can be automatically, the convenient and projector of exactly described pattern distortion being proofreaied and correct.
A kind of projector comprises optics keystone device, also comprises the image distortion correction system, and described image distortion correction system comprises: be used to detect the spatial triaxial locating device of projector with respect to the position data of spatial triaxial; Be used for regulating the regulating device of described optics keystone device according to steering order; And, be used for calculating the adjustment position and the angle of described optics keystone device according to the position data that described spatial triaxial locating device detects, described regulating device is sent the control module of steering order.
Compared with prior art, projector of the present invention image distortion correction method and system thereof, and projector of the present invention can be adjusted to optics keystone device best state automatically after projector powers on.By the position of spatial triaxial locating device sensing projector with respect to spatial triaxial, therefore can on three of controls, accurately locate projector, and analyze projector according to positioning result and whether correctly put, if there is skew the position, then regulate described optics keystone device automatically, when being shifted once more, also can regulate automatically once more in projector according to the position data that detects, need not artificial participation, very convenient.Can eliminate owing to the projected image distortion that is not just causing is put by projector.
Description of drawings
Fig. 1 is the process flow diagram of projector of the present invention image distortion correction method;
Fig. 2 is the structural representation of projector of the present invention;
Fig. 3 is projector of the present invention image distortion correction method and system's principle of work synoptic diagram in one embodiment thereof.
Embodiment
See also Fig. 1, Fig. 1 is the process flow diagram of projector of the present invention image distortion correction method.
Described projector image distortion correction method comprise following innovative technology: the induction of spatial triaxial location, spatial triaxial data processing and the control of spatial triaxial direction.Specifically may further comprise the steps:
Step S101 obtains the position data of projector with respect to spatial triaxial from the spatial triaxial locating device that is arranged in the projector;
Projector obtains by a spatial triaxial locating device with respect to the location of spatial triaxial.Its essence of this sensing device is a kind of sensor, the sensitive element of its inside is converted to corresponding electric signal with projector in the positioning signal of spatial triaxial, and enters pre-amplification circuit, after through signal conditioning circuit signal being improved, carry out analog to digital conversion again, finally obtain digital signal.
In the present embodiment, the position data of projector on every of spatial triaxial all can represent that described position data all is stored in the internal storage region of this spatial triaxial locating device by a byte.When described position data changed, the corresponding data that is stored in internal storage region can upgrade automatically.
Described spatial triaxial locating device can also be a plurality of sensors that are separately positioned on several corners of projector, described sensor can be three dimension acceleration sensor, gravity sensor or gyro sensor, be used for detecting the position data of definite projector on spatial triaxial, for example can measure the displacement of projector by acceleration transducer is set according to default three-dimensional system of coordinate.With the gravity sensor is example, can a gravity sensor be set respectively at three angles of projector, respond to the angle of inclination with respect to the horizontal plane at three angles respectively, thereby can determine the anglec of rotation of projector with respect to the horizontal X axle, the described anglec of rotation that detects acquisition is as the position data of projector with respect to spatial triaxial.Those skilled in the art can freely be provided with type of sensor and installation site as required, so that obtain corresponding position data.
Step S102 compares position data and the reference location data that detects, and obtains the position offset of projector;
The computing of step S102 and step S103 can realize in the central processing unit of projector, when the central processing unit of projector need obtain when the position data of front projection machine on spatial triaxial, it can be by reading the data of spatial triaxial locating device internal storage region, and these data can be passed through I2C (twin wire universal serial bus) protocol transmission.
Preestablish a reference location data and preserve, described reference location data is preferably described projector and steadily places, do not have or during minimum pattern distortion, projector in three-dimensional system of coordinate with respect to the position data of spatial triaxial.Described reference location data also can be set through behind the field adjustable by the user, and is corresponding with the use site environment of projector.Described reference location data can be kept in the reservoir of a special use, for reading calculating at any time.
In this step, detection position data and the described reference location data of obtaining compared, promptly can calculate the position offset of described projector.
Step S103 calculates the adjustment position and the angle of the optics keystone device of described projector according to described position offset;
Can calculate the adjustment position and the angle of described optics keystone device in this step according to keystone method commonly used in this area, not be described in detail at this.When concrete set-up and calculated flow process, can also consider to calculate according to the on-the-spot environment for use informix of operating personnel's input.
As preferred embodiment a kind of, in reservoir, preserve a plurality of position offsets in advance, and adjust position and angle one to one with described position offset;
Then in this step, can in described reservoir, search corresponding adjustment position and angle according to the position offset of described projector.Adjust the purpose of position and angle to reach quick acquisition.
The a plurality of position offsets preserved in advance in the described reservoir and corresponding adjustment position and angle can be measured setting according to field adjustable by the user, also can carry out analog computation according to the condition that the user sets and set.
Step S104 adjusts described optics keystone device according to result of calculation.
According to adjustment position and the angle calculated in the above-mentioned steps, position, the angle of the optics keystone device of described projector are adjusted, make the image of projection keep the rectangle of rule.
The central processing unit of projector is after calculating described adjustment position and angle, can send control or correction signal, by gearing such as motor, rotating shaft etc., position, the angle of regulating and controlling optics keystone device are adjusted, and the most conical light of hernia lamp generation is proofreaied and correct and is the rectangular ray of light approximate with projected image.
Projector of the present invention image distortion correction method both can automatically perform after projector powers on; Also can be arranged to just automatically perform once, so that reach the effect of real-time regulated every one period schedule time.
See also Fig. 2, Fig. 2 is the structural representation of projector of the present invention.
Described projector comprises: optics keystone device 11, and spatial triaxial locating device 12, control module 13 and regulating device 14, described spatial triaxial locating device 12 is used to detect the position data of projector with respect to spatial triaxial; Described regulating device 14 is used for regulating according to steering order the optics keystone device 11 of projector; Described control module 13 is used for calculating according to the position data that described spatial triaxial locating device 12 detects the adjustment position and the angle of described optics keystone device 11, and described regulating device 14 is sent steering order.
Wherein, described spatial triaxial locating device 12, described control module 13 and described regulating device 14 constitute image distortion correction system of projector of the present invention.The system that can be used as independently makes, and is added on prior art and has in the projector of optics keystone device, so that the projector of prior art can reach the purpose of automatic adjustment pattern distortion.
Described spatial triaxial locating device 12 essence are a kind of sensors, the sensitive element of its inside is converted to corresponding electric signal with the positioning signal of projector's spatial triaxial, and enter pre-amplification circuit, after the process signal conditioning circuit improves signal, carry out analog to digital conversion again, finally obtain digital signal.
In the present embodiment, the position data of projector on every of spatial triaxial all can represent that described position data all is stored in the internal storage region of described spatial triaxial locating device 12 by a byte.When described position data changed, the corresponding data that is stored in internal storage region can upgrade automatically.
Described spatial triaxial locating device 12 can also be a plurality of sensors that are separately positioned on several corners of projector, described sensor can be three dimension acceleration sensor, gravity sensor or gyro sensor, be used for detecting the position data of definite projector on spatial triaxial, for example can measure the displacement of projector by described acceleration transducer according to default three-dimensional system of coordinate.Be example again with the gravity sensor, can a gravity sensor be set respectively, respond to the angle of inclination with respect to the horizontal plane at three angles respectively, thereby can determine the anglec of rotation of projector with respect to the horizontal X axle at three angles of projector.The described anglec of rotation that detects acquisition is as the position data of projector with respect to spatial triaxial.Those skilled in the art can freely be provided with type of sensor and installation site as required and constitute described spatial triaxial locating device 12, so that obtain corresponding position data.
After projector powered on, described control module 13 obtained the position data of projector with respect to spatial triaxial from described spatial triaxial locating device 12, and position data and the reference location data that detects compared, and calculated the position offset that obtains projector;
Described control module 13 can be realized by control corresponding software is installed in the central processing unit of projector, when described control module 13 needs to obtain when the position data of front projection machine on spatial triaxial, it can be by reading the data of described spatial triaxial locating device 12 internal storage regions, and these data can be passed through 12C (twin wire universal serial bus) protocol transmission.
Further, also comprise a reservoir (figure do not show), preestablish a reference location data and be kept in the described reservoir.Then described control module 13 can read the reference location data of described reservoir, and compares with the detection position data of obtaining, and promptly can calculate the position offset of described projector.
Described reference location data is preferably described projector and steadily places, do not have or during minimum pattern distortion, projector in three-dimensional system of coordinate with respect to the position data of spatial triaxial.Described reference location data also can be set through behind the field adjustable by the user, and is corresponding with the use site environment of projector.Described reference location data is kept in the special-purpose reservoir, for reading calculating at any time.
After described control module 13 calculates the position offset of projector, calculate the adjustment position and the angle of the optics keystone device of described projector according to described position offset;
The adjustment position of described optics keystone device and angle can be calculated according to keystone method commonly used in this area, are not described in detail at this.When the calculation process of the described control module 13 of concrete setting, can also consider to calculate according to the on-the-spot environment for use informix of operating personnel's input.
As preferred embodiment a kind of, further comprise and preserve a plurality of default position offsets, and adjust second storage element (figure does not show) of position and angle one to one with described position offset; Described control module 13 is searched described second storage element according to the position offset of described projector, obtains corresponding adjustment position and angle, and described regulating device 14 is sent steering order.Adjust the purpose of position and angle to reach quick acquisition.
The a plurality of position offsets preserved in advance in described second reservoir and corresponding adjustment position and angle can be measured setting according to field adjustable by the user, also can carry out analog computation according to the condition that the user sets and set.
Described control module 13 (central processing unit of projector) is after calculating described adjustment position and angle, can be to described regulating device 14 output control or correction signals, described regulating device 14 comprises the gearing that connects described optics keystone device, and the chip for driving of controlling described gearing, wherein said chip for driving is according to described control or correction signal, control described gearing such as motor, rotating shaft etc., control the optical mirror slip of described optics keystone device 11 and adjust, the most conical light of hernia lamp generation is proofreaied and correct and is the rectangular ray of light approximate with projected image.
Image distortion correction system of projector of the present invention both can automatically perform image distortion correction after projector powers on; Also can be arranged to just automatically perform image distortion correction one time, so that reach the effect of real-time regulated every one period schedule time.
Illustrate the principle of work of projector of the present invention image distortion correction method and system thereof below:
As shown in Figure 3, suppose that A is the position at spatial triaxial locating device 12 places, B is the position at optics keystone device place.
During beginning, the position 12 of spatial triaxial locating device is parallel with the space X axle, and optics keystone device 11 is vertical with the space X axle, the conical light that this moment, the hernia lamp produced will be approximate rectangular with projected image through optics keystone device 11 back light, and it is distortionless that image is beaten on screen.And when projector's occurrence positions skew, after making the position of spatial triaxial locating device be rotated counterclockwise a angle, reach position A ' (dotted line position among the figure), this moment if optics keystone device 11 still under the state vertical, so finally beat with X-axis image on screen above will producing little below big keystone distortion.By projector of the present invention image distortion correction method or its system handles, the hue angle that calculates optics keystone device 11 in real time is b, then control described optics keystone device 11 to dextrorotation gyration b, reach position B ' (dotted line position among the figure), after distortion proofreaied and correct, so finally the image of beating on screen will be corrected.
Spatial triaxial locating device 11 is after being rotated counterclockwise a angle, projector will change in the position of spatial triaxial, and three corresponding position datas of the internal storage of described spatial triaxial locating device 11 storage also can be updated to the position data of current detection.Projector's central processing unit just can know that by the contrast reference location data projector has been rotated counterclockwise a angle after collecting these up-to-date data, and this moment, central processing unit will carry out calculation process to the position data that collects.Finally draw the direction (clockwise) and the angle b of 11 rotations of optics keystone device, and then optics keystone device 11 is transmitted control signal, make the current distortion of optics keystone device correction.
In this was given an example, angle a and angle b were opposite sign but equal magnitude in theory, and the relation of angle a and angle b is also relevant with environment for use at that time, if projection screen is vertical with ground (X-axis), so this relation is set up.
Above-described embodiment, just projector in the space embodiment of rotation on wherein.Those skilled in the art can be with projector of the present invention image distortion correction method or its system applies image distortion correction that the optional position skew on spatial triaxial is produced in projector.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (9)
1. projector's image distortion correction method is characterized in that, may further comprise the steps:
Obtain the position data of projector from the spatial triaxial locating device that is arranged in the projector with respect to spatial triaxial;
The position data and the reference location data that detect are compared, obtain the position offset of projector;
Calculate the adjustment position and the angle of the optics keystone device of described projector according to described position offset;
According to result of calculation described optics keystone device is adjusted.
2. projector as claimed in claim 1 image distortion correction method is characterized in that, calculates the adjustment position of optics keystone device of described projector and the step of angle according to described position offset and comprises:
In reservoir, preserve a plurality of position offsets in advance, and adjust position and angle one to one with described position offset;
According to the position offset of described projector, search adjustment position and angle corresponding in the described reservoir.
3. an image distortion correction system of projector is characterized in that, comprising:
Be used to detect the spatial triaxial locating device of projector with respect to the position data of spatial triaxial;
Be used for regulating the regulating device of the optics keystone device of projector according to steering order;
And, be used for calculating the adjustment position and the angle of described optics keystone device according to the position data that described spatial triaxial locating device detects, described regulating device is sent the control module of steering order.
4. image distortion correction system of projector as claimed in claim 3, it is characterized in that, described control module with position data that detects and the reference location data of presetting relatively, calculate the position offset of projector, and calculate the adjustment position and the angle of the optics keystone device of described projector according to described position offset, described regulating device is sent steering order.
5. image distortion correction system of projector as claimed in claim 4 is characterized in that, also comprises being used to preserve described reference location data first storage element that reads for described control module.
6. image distortion correction system of projector as claimed in claim 5 is characterized in that, also comprises preserving a plurality of default position offsets, and adjusts second storage element of position and angle one to one with described position offset;
Described control module is searched described second storage element according to the position offset of described projector, obtains corresponding adjustment position and angle, and described regulating device is sent steering order.
7. a projector comprises optics keystone device, it is characterized in that, further comprises the image distortion correction system, and described image distortion correction system comprises:
Be used to detect the spatial triaxial locating device of projector with respect to the position data of spatial triaxial;
Be used for regulating the regulating device of described optics keystone device according to steering order;
And, be used for calculating the adjustment position and the angle of described optics keystone device according to the position data that described spatial triaxial locating device detects, described regulating device is sent the control module of steering order.
8. projector as claimed in claim 7, it is characterized in that, described control module with position data that detects and the reference location data of presetting relatively, calculate the position offset of projector, and calculate the adjustment position and the angle of the optics keystone device of described projector according to described position offset, described regulating device is sent steering order.
9. projector as claimed in claim 8 is characterized in that, further comprises storage element, and described storage element is used for preserving in advance a plurality of position offsets, and adjusts position and angle one to one with described position offset;
Described control module is searched described storage element according to the position offset of described projector, obtains corresponding adjustment position and angle, and described regulating device is sent steering order.
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