CN101630240A - Electronic white board equipment and drawing method thereof - Google Patents
Electronic white board equipment and drawing method thereof Download PDFInfo
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- CN101630240A CN101630240A CN200910109448A CN200910109448A CN101630240A CN 101630240 A CN101630240 A CN 101630240A CN 200910109448 A CN200910109448 A CN 200910109448A CN 200910109448 A CN200910109448 A CN 200910109448A CN 101630240 A CN101630240 A CN 101630240A
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- 230000015654 memory Effects 0.000 claims description 35
- 238000004321 preservation Methods 0.000 claims description 9
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- 238000005516 engineering process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
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Abstract
The invention discloses electronic white board equipment and a drawing method thereof. The device comprises a handwriting identification module and a graphical operation module, wherein the handwriting identification module is used for identifying a signal input in any position of a white board and carrying out voice playing while identifying; the graphical operation module comprises a first storage unit, a second storage unit, a graph-selecting unit and a drawing unit; the first storage unit stores a plurality of graphs unchanged in the white board; the second storage unit stores graphs to be stored in the white board; the graph-selecting unit is used for storing a graph selected by the first storage unit to the second storage unit when the handwriting identification module identifies a graph-selecting operation; and the drawing unit is used for re-drawing other graphs in a region where the selected graph is arranged into the first storage unit and directly copying all the graphs of the first storage unit and the second storage unit as images to a screen for displaying when re-drawing the graphs. The invention can effectively improve the drawing efficiency of the electronic white board.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to electronic white board equipment.
Background technology
Electronic whiteboard at first is the equipment of a kind of training and record, and its technical development is in proper order: the 1) blank used of common bulletin; 2) for content of the discussions being duplicated the reprography formula blank that gets off; 3) convenient demonstration and training also can be preserved the interactive electric whiteboard of whole conference process.
So-called duplicating formula electronic whiteboard promptly just can scan content written on the blank and print by certain mode by user's simple operations.Its function complete process is the same with common duplicating process, at first by image sensing device the content on the blank is gathered, and acquired signal is through after certain Flame Image Process, at last with temperature-sensitive, ink-jet or the output of other printing types.
Interactive electric whiteboard can carry out information communication with computer, electronic whiteboard is connected to PC, and utilize projector that the content on the PC is projected on the electronic whiteboard screen, under the support of special application program, can construct a giant-screen, interactively cooperation meeting or teaching environment.Utilize specific pen with means for holding it in right position to replace mouse, can move Any Application, any operation that can edit file, note, preservation etc. utilizes keyboard and mouse to realize on computers at the enterprising line operate of blank.At present, the location of interactive whiteboard can be adopted: (1) pressure sensitivity technology, (2) laser technology, (3) electromagnetic wave technology, (4) infrared technology, (5) ultrasonic technology.
Electronic whiteboard needs blank software to operate, and still, present electronic whiteboard technology is imperfection still, often will show a lot of figures such as blank software in window.Curve, straight line, ellipse, picture figures are arranged.If draw so multiple graphs in the disposable redraw process, will become very slow, card when operating to user's sensation.
In addition, on November 9th, 2005, the Chinese invention patent of bulletin disclosed for No. 200510034435.9 a kind of based on Fu Wuqiduan client terminal structure remote display processing method, adopted the data of adjacent position in special interframe increment compression of server S erver end and the frame to compare the compress technique scheme, the account form of complexity in the interframe that the discards tradition compression scheme; Client Client end adopts the mode of incremental refreshment to carry out the image demonstration, only a part that changes is refreshed, and localized variation refreshes with regard to only carrying out the part; The refresh rate of remote desktop is largely increased, can reduces the system for computer resources occupation rate greatly simultaneously.
Summary of the invention
The technical matters that the present invention mainly solves provides a kind of electronic white board equipment and drawing practice thereof, can effectively improve the drawing efficiency of electronic whiteboard.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of electronic white board equipment is provided, comprises: the handwriting recognition module is used to be identified in the signal that blank is imported Anywhere, and carries out the voice reporting sound in identification; The graphic operation module comprises: first storage unit, preserve a plurality of figures that do not change in the blank; Second storage unit is preserved the figure that is about to preservation in the blank; The figure selecting unit is used for when described handwriting recognition module identifies the selection graphic operation, and the figure that will choose in described first storage unit is kept in described second storage unit; The drawing unit is used for described other figures of the region of figure of choosing are redrawn described first storage unit; And when redrawing, directly copy whole figures of described first storage unit and second storage unit to screen as image and show.
Wherein, described graphic operation module also comprises: be used for described figure selecting figure that the unit is chosen is amplified, dwindles, moves or rotary manipulation and connect the operating unit of described drawing unit.
Wherein, further comprise: the file operation module is used for when described handwriting recognition module identifies hold-over command described image at screen display being saved as the user-defined format file; The screen tool model is used for when described handwriting recognition module identifies optically focused or hide the screen order, and the image that the drawing unit is drawn carries out spotlight or hides the screen operation.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of electronic whiteboard drawing practice is provided, comprises: preserve a plurality of figures in the blank in first memory location; When in blank, choosing the part figure in described a plurality of figure, the described part figure of choosing is kept at second memory location; Other figures in the described region of choosing figure are redrawn described first memory location; Directly copying whole figures of described first memory location and second memory location to screen as image when redrawing shows.
Wherein, the described step that redraws comprises: obtain the Crop Area earlier, in drawing process, judge described figure then whether in described Crop Area, if described figure would be drawn, otherwise do not draw.
Wherein, described first, second memory location is the different storage zone in the internal memory, the described step that redraws comprises: the described a plurality of figures that will show are drawn in described internal memory earlier, once the graph data in the described internal memory is copied to the screen demonstration of getting on then.
Wherein, the described step that redraws comprises: remove the background that repaints window when redrawing, heavily loaded OnEraseBkgnd (CDC*pDC) is return true directly.
The invention has the beneficial effects as follows: be different from the prior art electronic whiteboard and when showing a plurality of figure, adopt the disposable method that redraws and cause showing slower situation, the separately preservation of figure that the present invention will need the figure that changes and not need to change, show that this figure needs to change during a certain figure in elected, special this figure of choosing of preserving, to not need the figure of the figure that changes and needs change directly to copy screen to as image then when redrawing shows, obviously, the present invention does not need to repaint one by one all figures when only the part figure on the electronic whiteboard being operated, but the disposable as a setting drafting of the figure that will need not change improves graphic plotting efficient and speed in the electronic whiteboard greatly.
Description of drawings
Fig. 1 is the process flow diagram of electronic whiteboard drawing practice embodiment of the present invention;
Fig. 2 is the theory diagram of electronic white board equipment first embodiment of the present invention;
Fig. 3 is the theory diagram of electronic white board equipment second embodiment of the present invention;
Fig. 4 is the theory diagram of electronic white board equipment the 3rd embodiment of the present invention.
Embodiment
Consult Fig. 1, electronic whiteboard drawing practice embodiment of the present invention mainly may further comprise the steps:
Step 101: a plurality of figures in first memory location preservation blank;
Step 102: when in blank, choosing the part figure in described a plurality of figure, the described part figure of choosing is kept at second memory location;
Step 103: other figures in the described region of choosing figure are redrawn described first memory location;
Step 104: when redrawing, directly copy whole figures of described first memory location and second memory location to screen as image and show.
Being different from the prior art electronic whiteboard adopts the disposable method that redraws and causes showing slower situation when showing a plurality of figure, the separately preservation of figure that the present invention will need the figure that changes and not need to change, show that this figure needs to change during a certain figure in elected, special this figure of choosing of preserving, to not need the figure of the figure that changes and needs change directly to copy screen to as image then when redrawing shows, obviously, the present invention does not need to repaint one by one all figures when only the part figure on the electronic whiteboard being operated, but the disposable as a setting drafting of the figure that will need not change improves graphic plotting efficient and speed in the electronic whiteboard greatly.
For further improving drawing efficiency and speed, the described step that redraws can comprise:
Obtain the Crop Area earlier, in drawing process, judge described figure then whether in described Crop Area, if described figure would be drawn, otherwise do not draw.
Often in the window of electronic whiteboard, show a lot of figures.Curve is arranged, straight line, ellipse, picture figures.
If draw so multiple graphs in the disposable redraw process, will become very slow, card when operating to user's sensation.Therefore present embodiment design: all do not show the figure that window is drawn.Such as, drawn two rectangles at window, the drafting of two rectangles all can be carried out when redrawing, but might have only a zone that is presented at demonstration, only shows one.
The MFC framework that the software that embodiment adopted of electronic whiteboard drawing practice of the present invention is based on Microsoft is developed, and MFC itself is provided with the Crop Area in order to improve the efficient that redraws.The effect of Crop Area is exactly: only the drawing course in this district just can be really effective, and outside the district is invalid, also can not show even carried out drawing function outside the district.
Because show much more time-consumingly than the calculating of drawing course, the part that just just should show that shows behind the Crop Area has been arranged, improved display efficiency greatly.Like this, obtain the Crop Area earlier, judge figure then in the drawing process whether in this district, if just drawing this figure, not just not draw.
For avoiding flicker to improve drawing effect, can adopt following method at least:
1) described first, second memory location is the different storage zone in the internal memory, and the described step that redraws comprises:
The described a plurality of figures that will show are drawn in described internal memory earlier, once the graph data in the described internal memory is copied to the screen demonstration of getting on then.
2) the described step that redraws comprises:
Remove the background that repaints window when redrawing, heavily loaded OnEraseBkgnd (CDC*pDC) is return true directly.
In electronic whiteboard, flicker is exactly a contrast, and contrast is big more, and it is severe more to glimmer.Drawing on screen window all can run into this problem, therefore:
The first, remove the background that repaints window, promptly heavily loaded OnEraseBkgnd (CDC*pDC) is return true directly.
The second, with the method for two buffer memorys.Two buffer memorys come out graphic plotting in internal memory exactly, are plotted to then that shape shows on the screen.The figure that will show is drawn in internal memory earlier, disposablely then copied the graph data in the internal memory to the screen demonstration of getting on.This process is very fast, because be whole section memory copying.
When drawing in internal memory like this, how to draw and can not dodge, because on being attached to screen the time, figure and screen display figure difference final in the internal memory are very little, seem so just can not dodge.
Consult Fig. 2, the present invention also provides electronic white board equipment embodiment, comprising:
The handwriting recognition module is used to be identified in the signal that blank is imported Anywhere, and carries out the voice reporting sound in identification;
The graphic operation module comprises:
First storage unit is preserved a plurality of figures that do not change in the blank;
Second storage unit is preserved the figure that is about to preservation in the blank;
The figure selecting unit is used for when described handwriting recognition module identifies the selection graphic operation, and the figure that will choose in described first storage unit is kept in described second storage unit;
The drawing unit is used for described other figures of the region of figure of choosing are redrawn described first storage unit; And when redrawing, directly copy whole figures of described first storage unit and second storage unit to screen as image and show.
Electronic white board equipment embodiment of the present invention adopts innovatively and can be identified in the blank handwriting recognition module of input signal Anywhere, and has the function of carrying out the voice reporting sound simultaneously, makes that the operation of electronic whiteboard is more convenient and effective; And do not need to repaint one by one all figures when only the part figure on the electronic whiteboard being operated, with the disposable as a setting drafting of the figure that need not change, improve graphic plotting efficient and speed in the electronic whiteboard greatly, can possess enough plotting speeds and come operating speed and the scope of match user, significantly improve performance electronic whiteboard.
Consult Fig. 3, in other embodiments, described graphic operation module also comprises: be used for described figure selecting figure that the unit is chosen is amplified, dwindles, moves or rotary manipulation and connect the operating unit of described drawing unit.
Consult Fig. 4, in other embodiments, can further include:
The file operation module is used for when described handwriting recognition module identifies hold-over command described image at screen display being saved as the user-defined format file.Described file layout can be forms such as bmp, jpeg, gif or png.
The screen tool model is used for when described handwriting recognition module identifies optically focused or hide the screen order, and the image that the drawing unit is drawn carries out spotlight or hides the screen operation, and promptly the content of blank shows in some specific regions.
Wherein, the handwriting recognition module can write at the mouse that carries out Anywhere of blank, can be to Chinese character, and digital 0-9, the identification of 26 English alphabets, and in identification, carry out the voice reporting sound.
Following table is the wherein partial function tabulation of an embodiment of electronic white board equipment of the present invention:
| 1: spotlight | 2: hide screen (hide screen all around, up and down, about hide screen) | 3: the film recording function | 4: insert object functionality |
| 5: choose function | 6: the paintbrush function | 7: straight line is drawn function | 8: rectangle is drawn function |
| 9: circle is drawn function | 10: the polygon rendering function | 11: the erasing rubber function | 12: cancel function |
| 13: return function | 14: page up | 15: following one page | 16: the on-screen keyboard function |
| 17: the local resource library facility | 18: text function (keyboard input) | 19: hand-write input function | 20: phonetic function |
| 21: figure, image spinfunction | 22: fundamental figure color change function | 23: the fundamental figure thickness changes function | 24: the fundamental figure size changes function |
| 25: the interface handoff functionality | 26: newly-built page function | 27: function opens file | 28: preserve file function |
| 29: insert the background color function | 30: directly open help function | 31: open the notepad function | 32: minimize function |
| 33: page delete function | 34: function quits a program | 35: import DOC, TXT, the file of forms such as PPT | 36: the priority Presentation Function that blocks figure |
The present invention also provides electronic white board equipment embodiment can be applied to optical display TV, such as the invention provides a kind of electric whiteboard system, comprises rear-projection TV and electronic white board equipment.Described rear-projection TV comprises the touch-screen that is positioned at the display screen surface, and the input of described display screen and the output of touch-screen are connected to described electronic white board equipment.Described electronic white board equipment comprises:
The handwriting recognition module connects the touch-screen of described rear-projection TV, is used to be identified in the signal that described touch-screen is imported Anywhere, and carries out the voice reporting sound in identification;
The graphic operation module comprises:
First storage unit is preserved a plurality of figures that do not change in the display screen;
Second storage unit is preserved the figure that is about to preservation in the display screen;
The figure selecting unit is used for when described handwriting recognition module identifies the selection graphic operation, and the figure that will choose in described first storage unit is kept in described second storage unit;
The drawing unit connects the display screen of described rear-projection TV, is used for described other figures of the region of figure of choosing are redrawn described first storage unit; And when redrawing, directly copy whole figures of described first storage unit and second storage unit to display screen as image and show.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (7)
1. an electronic white board equipment is characterized in that, comprising:
The handwriting recognition module is used to be identified in the signal that blank is imported Anywhere, and carries out the voice reporting sound in identification;
The graphic operation module comprises:
First storage unit is preserved a plurality of figures that do not change in the blank;
Second storage unit is preserved the figure that is about to preservation in the blank;
The figure selecting unit is used for when described handwriting recognition module identifies the selection graphic operation, and the figure that will choose in described first storage unit is kept in described second storage unit;
The drawing unit is used for described other figures of the region of figure of choosing are redrawn described first storage unit; And when redrawing, directly copy whole figures of described first storage unit and second storage unit to screen as image and show.
2. electronic white board equipment according to claim 1 is characterized in that, described graphic operation module also comprises:
Be used for described figure selecting figure that the unit is chosen is amplified, dwindles, moves or rotary manipulation and connect the operating unit of described drawing unit.
3. electronic white board equipment according to claim 2 is characterized in that, further comprises:
The file operation module is used for when described handwriting recognition module identifies hold-over command described image at screen display being saved as the user-defined format file;
The screen tool model is used for when described handwriting recognition module identifies optically focused or hide the screen order, and the image that the drawing unit is drawn carries out spotlight or hides the screen operation.
4. an electronic whiteboard drawing practice is characterized in that, comprising:
A plurality of figures in first memory location preservation blank;
When in blank, choosing the part figure in described a plurality of figure, the described part figure of choosing is kept at second memory location;
Other figures in the described region of choosing figure are redrawn described first memory location;
Directly copying whole figures of described first memory location and second memory location to screen as image when redrawing shows.
5. electronic whiteboard drawing practice according to claim 4 is characterized in that, the described step that redraws comprises:
Obtain the Crop Area earlier, in drawing process, judge described figure then whether in described Crop Area, if described figure would be drawn, otherwise do not draw.
6. electronic whiteboard drawing practice according to claim 5 is characterized in that, described first, second memory location is the different storage zone in the internal memory, and the described step that redraws comprises:
The described a plurality of figures that will show are drawn in described internal memory earlier, once the graph data in the described internal memory is copied to the screen demonstration of getting on then.
7. electronic whiteboard drawing practice according to claim 6 is characterized in that, the described step that redraws comprises:
Remove the background that repaints window when redrawing, heavily loaded OnEraseBkgnd (CDC*pDC) is return true directly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101094486A CN101630240B (en) | 2009-08-18 | 2009-08-18 | Electronic white board equipment and drawing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101094486A CN101630240B (en) | 2009-08-18 | 2009-08-18 | Electronic white board equipment and drawing method thereof |
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| CN101630240A true CN101630240A (en) | 2010-01-20 |
| CN101630240B CN101630240B (en) | 2011-11-09 |
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