CN102118594B - Front projection system and method - Google Patents
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- CN102118594B CN102118594B CN200910312932.9A CN200910312932A CN102118594B CN 102118594 B CN102118594 B CN 102118594B CN 200910312932 A CN200910312932 A CN 200910312932A CN 102118594 B CN102118594 B CN 102118594B
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- 238000004891 communication Methods 0.000 claims abstract description 11
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- 230000001276 controlling effect Effects 0.000 description 2
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Abstract
The invention relates to a front projection system, which comprises a communication unit, a symbol calling unit, a detection unit and a control unit. The communication unit transmits a target object image shot by a first photograph camera to a projection machine for projection so as to form a projection area; the symbol calling unit transmits a plurality of symbols to the projection machine for projection so as to form a plurality of control symbols in the projection area; the detection unit analyzes the image shot by a second photograph camera and positioned in the projection area, so as to judge whether the control symbols are processed; the detection unit generates a detection signal corresponding to the processed control symbols when the control symbols are processed; and the control unit controls the first photograph camera and the second photograph camera or the projection machine to take corresponding actions according to the detection signal. The invention also provides a front projection method. The front projection system and the front projection method can flexibly control the projection of the target object.
Description
Technical field
The present invention relates to a kind of front projection system and method.
Background technology
The interior spaces such as classroom, meeting-place, lecture hall, hall are the important places that people carry out collective activity, increase along with the interior space, projection arrangement becomes requisite instrument gradually, think that student, participant, spectators etc. provide another piece " blackboard ", have made up the defect that large space brings in a way.At present, the above-mentioned interior space is mainly used front projection apparatus to carry out projection, that is, from the place ahead on the perspective planes such as curtain by image projection on this perspective plane, traditional front projection apparatus cannot free operant, for example, its projected area is pre-set, can not change with temporary needs, can not change at any time as required the zoom degree of projection, therefore, traditional front projection apparatus underaction, has often limited lecturer or presider's performance.
Summary of the invention
In view of above content, be necessary to provide the high front projection system of a kind of flexibility and method.
, comprising:
One communication unit, carries out projection to form a view field for sending the image of a target object of one first video camera shooting to a projector;
One symbol is transferred unit, for transferring some symbols, to described projector, carries out projection to form some control characters in described view field;
One detecting unit, for the image of analyzing the described view field that one second video camera takes, to judge whether described some control characters are operated, when having control character to be operated, the corresponding operated control character of described detecting unit produces a detection signal; And
One control unit, receives described detection signal, and controls according to described detection signal the action that described first, second video camera or described projector make a correspondence.
A method, comprises the following steps:
Image transmission step: the image of the target object that one first video camera is taken sends a projector to and carries out projection to form a view field;
Control character produces step: send some symbols to described projector and carry out projection to form some control characters in described control area;
Detecting step: whether the image of analyzing the described view field that one second video camera takes is operated to detect described some control characters, when detecting a control character while being operated, corresponding operated control character produces a detection signal; And
Control step: according to described detection signal, described first, second video camera or described projector are made the control action of a correspondence.
Described front projection system and method can realize the Real Time Observation to described target object by described the first video camera is carried out to projection to the captured image of described target object, also by control character being set in described view field, make operator pass through operational character number and control described first, second video camera and described projector, can control neatly as required the state of described view field, realize the Intelligent control to the projection of described target object.
Accompanying drawing explanation
Fig. 1 is that front projection system of the present invention is carried out the schematic diagram of projection to a target object.
Fig. 2 is the module map of the control system better embodiment in Fig. 1.
Fig. 3 is the schematic diagram that the control character in Fig. 1 is operated.
Fig. 4 A-4D is the state variation schematic diagram operating having the control character of two states in Fig. 1.
Fig. 5 A-5B opens the drag function of the view field in Fig. 1 and the schematic diagram that described view field is pulled.
Fig. 6 is the flow chart of front projection method better embodiment of the present invention.
Main element symbol description
Embodiment
Below in conjunction with accompanying drawing and better embodiment, the present invention is described in further detail:
Please refer to Fig. 1, the better embodiment of front projection system 1 of the present invention comprises two video camera 70,80 ,Yi projectors 90 and control system 100.Described video camera 70 is for taking a target object.Described projector 90 is by the image of the described target object of described control system 100 reception and by the image projection Yi view field receiving.Described video camera 80 is for taking described view field and sending its image to described control system 100.Described control system 100 is according to the corresponding operating state of controlling described projector 90 or video camera 70,80 of the image of described view field.In present embodiment, described video camera 70,80 is PTZ (Pan/tilt/zoom) video camera.Described video camera 70 and 80 also can be replaced by a camera with many shooting angle, and in this case, this camera also can be taken described target object and view field simultaneously, and realizes the function of described video camera 70,80.
Please continue to refer to Fig. 2, described control system 100 comprises that a communication unit 10, a symbol memory cell 20, a symbol transfer unit 30, a detecting unit 40 and a control unit 50.
Described communication unit 10 is for sending the image of the captured target object of described video camera 70 to described projector 90,90 of described projectors are by the image projecting of described target object to described view field, and described communication unit 10 also sends described detecting unit 40 to for the image of view field that described video camera 80 is taken.
Described symbol memory cell 20 is for storing a glossary of symbols 360, described glossary of symbols 360 comprises some the first symbols, and described the first symbol independently occurs, such as "+", "-" etc., described glossary of symbols 360 also can comprise some symbols pair, and each symbol is to being comprised of two second symbols.Wherein, each first symbol and each second symbol all have a specific meaning, and the meaning that the meaning of each the first symbol and each second symbol can be general with it is identical, also can be according to designer's the self-defining that requires.
Described symbol is transferred unit 30 for sending described some the first symbols to described projector 90, and optionally sending a second symbol of each symbol centering to described projector 90, described projector 90 for projecting described view field together with the image of first, second symbol receiving and described target object.Wherein, described first, second symbol forms some control characters in the projection of described view field, and each control character represents a control action, for example, and the projection that (Zoom in) described target object is amplified in "+" representative.
The image of described detecting unit 40 for described video camera 80 is taken, the image of described view field is detected, to judge whether described some control characters are operated.Wherein, described detecting unit 40 can be by judging whether a certain control character is blocked to judge whether this symbol is operated.When detecting a control character while being operated, described detecting unit 40 also sends a detection signal to described control unit 50, and described detection signal is corresponding to operated control character.
Described control unit 50 is for making corresponding control action according to the detection signal receiving to described video camera 70,80 or described projector 90.For example, when the corresponding operated control character of detection signal is "+", described control unit 50 is controlled described video camera 70 camera lens that furthers, to obtain the magnified image of target object, thus the image that makes the corresponding projection of described projector 90 go out to amplify.In present embodiment, described video camera 70 and 80 also comprises a driver element (not shown), and as motor and motor driver etc., this driver element is according to the corresponding video camera 70 and 80 of controlling of detection signal.In other embodiments, when control character is when to be "-" or "+" operated, described control unit 50 can directly be controlled described projector 90 image of the target object of reception is carried out to convergent-divergent processing, thus the image that projection goes out to dwindle or amplifies, and do not need to adjust the camera lens of described video camera 70.
In present embodiment, with above-mentioned front projection system 1, be applied to be illustrated in classroom 300, have a board 310 in described classroom 300, described board 310 is as target object.Described video camera 70 just starts to obtain continuously the image of described board 310 while starting.The image that described communication unit 10 obtains described video camera 70 sends described projector 90 to, described projector 90 is the plane in described classroom 300 by the image projecting of described board 310, on the wall 320 of board 310 tops, to form a view field 330, described view field 330 has a housing 340.
In present embodiment, suppose described glossary of symbols 360 comprise the first symbol " ▲ ",
"+", "-", " ◆ " and two symbols pair, wherein a symbol centering comprises two second symbols " ‖ ", "=", another symbol is to comprising two second symbols
and
In present embodiment, control character " ▲ " representative is controlled described video camera 70 and is moved up, control character
representative is controlled described video camera 70 and is moved down, control character
representative is controlled described video camera 70 and is moved right, control character
representative is controlled described video camera 70 and is moved to the left, the projection of amplifying (Zoom in) described target object is controlled in control character "+" representative, the projection of (Zoom out) described target object is dwindled in control character "-" representative, control character " ◆ " represents described projector 70 to be switched to other video cameras or other multimedia equipments, as computer, DVD etc., so that described projector 90 carries out projection to the image on other video cameras or multimedia equipment.
Described symbol transfer unit 30 for from described symbol memory cell 20, transfer above-mentioned the first symbol of enumerating and each symbol centering a second symbol (as symbol " ‖ " and
), and sending the symbol of transferring to described projector 90, described projector 90 is just projected in described view field 330 together with the image of the symbol of receiving and described board 310.The projection of above-mentioned symbol forms respectively corresponding control character, and described control character longitudinal arrangement is in the upper right corner of described view field 330, to form a control area 350.In other embodiments, described control area 350 also can maybe need to be positioned at according to user's use habit the ，Ru upper left corner, other position of described view field 330.In addition, described control character also can otherwise be dispersed in the zones of different of described view field 330.
Described video camera 80 is taken described view field 330, and described detecting unit 40 receives the image of the view field 330 of described video camera 80 shootings by described communication unit 10, to detect operator's operation.As shown in Figure 3, when operator shelters from corresponding control character with finger or other objects
time, the image that described video camera 80 photographs is at control character
just there is variation in the image feature value at place, described detecting unit 40 is detected these variations and is translated into corresponding detection signal and sends described control unit 50 to.Now, described detection signal is corresponding to control character
in present embodiment, image while prestoring described control area 350 not by operation in described detecting unit 40, when described detecting unit 40 receives the image of described video camera 80 shootings, described detecting unit 40 is compared prestore with it image feature of image of the image feature of the control area in this image 350, to detect the variation of the image feature of described control area 350, and be which control character is operated according to the position judgment that image feature variation occurs.
When described control unit 50 receives this detection signal, control described video camera 70 and move right.Now, described video camera 70 just can be taken right-hand scene of board 310, as the rota 370 in Fig. 1, and the image that shooting is obtained is sent to projector 90 by communication unit 10, and described projector 90 can be by the image projecting of described rota 370 to wall 320.
In present embodiment, when described detection signal is during corresponding to the formed control character of second symbol of a symbol centering, described control unit 50 sends a selection signal and transfers unit 30 to described symbol, and described symbol is transferred unit 30 and selected the another one second symbol of this symbol centering to send described projector 90 to form projection and to replace this operated control character.To be described in detail this below.
Continue referring to Fig. 4 A 4D, control character " ‖ " represents to control described video camera 70 and normally photographs, control character "=" represents to control described video camera 70 and suspends photography, wherein control character " ‖ " is an acquiescence control character, when starting described front projection system 1, described symbol is transferred unit 30 and is first selected to send symbol " ‖ " to described projector 90, with at described view field 330 formation control symbols " ‖ " (as shown in Figure 4 A).When position at control character " ‖ " of operator's Fingers, described detecting unit 40 detects described control character " ‖ " and is operated, and send corresponding detection signal to described control unit 50, described control unit 50 is controlled described video camera 70 and is suspended photography, and send corresponding selection signal and transfer unit 30 to described symbol, described symbol is transferred unit 30 and is selected to send symbol "=" to described projector 90, now, control character in view field 330 " ‖ " is replaced (as shown in Figure 4 B) by "=", to remind operator to suspend camera function, start.As shown in Fig. 4 C and 4D, when operator need to recover described video camera 70 from halted state, can point to described control character "=" (as shown in Figure 4 C), described detecting unit 40 detects described control character "=" and is operated, and send corresponding detection signal to described control unit 50, described control unit 50 is controlled described video camera 70 and is recovered normal photography, and send corresponding selection signal and transfer unit 30 to described symbol, described symbol is transferred unit 30 and is selected to send symbol " ‖ " to described projector 90, described projector 90 is again projected to symbol " ‖ " described view field 330 and replaces described control character "=" (as shown in Figure 4 D), to remind operator to continue photography, start.
Continue referring to Fig. 5 A-5B, control character
and
also represent two kinds of switchable control actions, control character
for default symbol, the drag function that described view field 330 is closed in expression, control character
represent that described view field 330 can freely be pulled.
Work as control character
during by operation, open drag function, now the control character in view field 330
by control character
institute replaces.Whether described detecting unit 40 detected described view field 330 and pulled afterwards, after operator's finger can point to the housing 340 of described view field 330 and move along described wall 320, described video camera 80 can be taken This move, moving direction and the displacement of operator's finger described in the image detecting that described detecting unit 40 is taken by the described video camera 80 of analysis, and transmitting corresponding towing signal to described control unit 50, described control unit 50 is controlled described projector 90 and with operator's finger, is moved the size of the described view field 330 of adjustment.As shown in Figure 5 B, when operator's Fingers is to described housing 340 and while moving to lower right, described view field 330 is extended.When needs are closed drag function, operational character number
, the size of described view field 330 control character in ，Qie view field 330 that is fixed now
by control character
institute replaces.
In other embodiments, when the above-mentioned control character of operation, described control unit 50 also can be controlled the color of described projection arrangement change control character to remind certain control character of operator to be operated.Two second symbols of each symbol centering also can be the identical and symbol that color is different of shape.
Please refer to Fig. 6, the better embodiment of front projection method of the present invention is applied to described front projection system 1, and described front projection method comprises the following steps:
Step S1: image transmission step: the image of the target object that described communication unit 10 is taken described video camera 70 sends described projector 90 to, 90 of described projectors after receiving the image of target object by image projecting to plane of target object to form a view field.In present embodiment, described target object is board 310.
Step S2: control character produces step: described symbol is transferred unit 30 and transferred the first symbol in described glossary of symbols 360 and a second symbol of each symbol centering, and by described projector 90, the symbol of transferring is projected to described view field.The image of described first, second symbol in described view field forms some control characters, the corresponding control action of each control character.
Step S3: detecting step: whether the described some control characters of described detecting unit 40 detecting are operated, when described detecting unit 40 has detected control character while being operated, performs step S4, if do not have control character to be operated, returns to step S1.
Step S4: signal produces step: the corresponding operated control character of described detecting unit 40 produces a detection signal, and described detection signal is sent to described control unit 50.In present embodiment, described detection signal is corresponding to operated control character.Described detecting unit 40 can be by analyzing the variation of the image feature of the described view field 330 that described video camera 80 photographs, to detect the operation of operator to described some control characters.
Step S5: determining step: described control unit 50 judges that according to the detection signal receiving whether operated control character is corresponding with a second symbol of symbol centering.If operated control character is corresponding with a second symbol of a symbol centering, perform step S6.If operated control character is not corresponding with any second symbol, illustrate that this control character is one first symbol, performs step S7.
Step S6: select step: described control unit 50 sends one and selects signal to transfer unit 30 to described symbol, described symbol is transferred unit 30 and is selected the another one second symbol of this symbol centering to send described projector 90 to form projection and to replace this operated control character.
Step S7: control step: described control unit 50 controls described video camera 70,80 according to the detection signal receiving or described projector 90 makes corresponding action.
In described glossary of symbols 360, do not comprise symbol to time, described determining step and select step to omit, now described control unit 50 is directly controlled described video camera 70,80 according to described detection signal or described projector 90 makes corresponding action.
In present embodiment, when described control unit 50 is controlled described projectors 90 and is opened the drag function to described view field, described detecting unit 40 is also by analyzing the variation of image feature of position of the housing 340 of the described view field 330 that described video camera 80 photographs, to produce corresponding towing signal, described control unit 50 adjusts the size of described view field 330 according to this towing signal.
Front projection system of the present invention and method can realize the Real Time Observation to target object by the captured image of described video camera 70 is carried out to projection, described control character is also set in described view field, by detecting the variation of the characteristics of image of described control character, judge the type of operated control character, so that described video camera 70,80 and described projector 90 are carried out to a corresponding control action, therefore, operator can control the state of described view field as required neatly, has realized the Intelligent control to the projection of described target object.
Claims (8)
1. a front projection system, comprising:
One communication unit, carries out projection to form a view field for sending the image of a target object of one first video camera shooting to a projector;
One symbol is transferred unit, for transferring some symbols, to described projector, carries out projection to form the control area that comprises some control characters in described view field;
One detecting unit, for analyzing the image of the described view field of one second video camera shooting, and the image feature of the control area in this image and the image feature prestoring corresponding to the image of this control area are compared, to judge whether described some control characters are operated, when having control character to be operated, the corresponding operated control character of described detecting unit produces a detection signal; And
One control unit, receives described detection signal, and controls according to described detection signal the action that described first, second video camera or described projector make a correspondence.
2. front projection system as claimed in claim 1, is characterized in that: described first, second video camera is PTZ video camera.
3. front projection system as claimed in claim 1, it is characterized in that: described control character comprises some the first symbols and some second symbols, described the first symbol is independent appearance, described second symbol is to occur in pairs,, in view field, only there is in the paired second symbol occurring in synchronization.
4. a front projection method, comprises the following steps:
Image transmission step: the image of the target object that one first video camera is taken sends a projector to and carries out projection to form a view field;
Control character produces step: send some symbols to described projector and carry out projection to form the control area that comprises some control characters in described view field;
Detecting step: the image of analyzing the described view field of one second video camera shooting, and the image feature of the control area in this image and the image feature prestoring corresponding to the image of this control area are compared, to detect described some control characters, whether operated, when detecting a control character while being operated, corresponding operated control character produces a detection signal; And
Control step: according to described detection signal, described first, second video camera or described projector are made the control action of a correspondence.
5. front projection method as claimed in claim 4, is characterized in that: described detecting step is whether to be blocked to judge by detecting described control character whether described control character is operated.
6. front projection method as claimed in claim 4, it is characterized in that: described control character is controlled the first symbol of first, second video camera and projector action and second symbol by some representatives and projected view field and form, described the first symbol is independent appearance, described second symbol is to occur in pairs,, in view field, only there is in the paired second symbol occurring in synchronization.
7. front projection method as claimed in claim 6, is characterized in that: after described detecting step and control before step further comprising the steps of:
Determining step: judge according to described detection signal whether operated control character is the projection of a second symbol; And
Select step: if operated control character is the projection of a second symbol, sending another second symbol corresponding with described second symbol to described projector carries out projection and replaces described operated control character, if operated control character is not the projection of a second symbol, carries out and control step.
8. front projection method as claimed in claim 4, is characterized in that: the described control action that first, second video camera or projector are made comprise control described the first video camera upwards, downwards, move to the left or to the right, dwindle or amplify described target object projection, enable or close described the first video camera time-out camera function, control described projector and enable or close the drag function of described view field, described the second video camera is switched to other video cameras, computer or multimedia equipment.
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| WO2009031457A1 (en) * | 2007-09-04 | 2009-03-12 | Canon Kabushiki Kaisha | Image projection apparatus and control method for same |
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| WO2009031457A1 (en) * | 2007-09-04 | 2009-03-12 | Canon Kabushiki Kaisha | Image projection apparatus and control method for same |
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