CN104408978A - Optical-principle-based calligraphy presentation system - Google Patents
Optical-principle-based calligraphy presentation system Download PDFInfo
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- CN104408978A CN104408978A CN201410763644.6A CN201410763644A CN104408978A CN 104408978 A CN104408978 A CN 104408978A CN 201410763644 A CN201410763644 A CN 201410763644A CN 104408978 A CN104408978 A CN 104408978A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B11/00—Teaching hand-writing, shorthand, drawing, or painting
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Abstract
The invention provides an optical-principle-based calligraphy presentation system, which comprises a tablet, light sources, a liquid crystal display panel, a photoelectric image sensor and an image processing device, wherein the tablet is a light transmission board; the light sources are arranged in a way of generating images on the tablet; the liquid crystal display panel is arranged at the bottom of the tablet; the photoelectric image sensor is used for acquiring calligraphy stroke images on the tablet; the image processing device is connected with the photoelectric image sensor and the liquid crystal display panel, and is used for collecting the stroke images in real time, processing the stroke images to extract stroke outline data, drawing the stroke outline data on a canvas, filling colors, forming calligraphy by virtue of continuously drawn and color-filled stroke outlines, and transmitting the canvas to the liquid crystal display panel for presentation. The system further comprises a power supply for supplying power and a bracket. According to the system, a user can still use a conventional writing brush, images on the canvas are relatively approximate to simulation effects of images actually written by the user, and requirements on hardware are lower.
Description
Technical field
The present invention relates to digitized video process field, present system in particular to the calligraphy person's handwriting based on optical principle.
Background technology
Along with the progress of modern science and technology, the develop rapidly of the universal and correlation technique of computing machine, people have new calligraphy creation mode.Traditional pen, ink, paper, inkstone are also no longer the essential tool of writing words.As a rule, people carry out text event detection work by keyboard and mouse.Therefore, on the basis of drawing traditional calligraphy art, in order to inherit, carry forward and developing calligraphy art, its emulation carrying out science is just become to one of problem of current art and the challenge of sciemtifec and technical sphere most.Meanwhile, calligraphy beginner will carry out a large amount of imitation training with knowledge and skills such as use pen, structure, the art of composition and the artistic conceptions of learning calligraphy to much outstanding calligraphy work.Computer simulation is carried out to calligraphic copying and production process and is conducive to quicker, easy, clean the practicing calligraphy of people, and decrease the waste of writing brushes, ink sticks, paper and ink stones, also excite the enthusiasm of people's learning calligraphy.
Varied to the simulation of writing brush in prior art, such as: according to the software algorithm of the dynamics of pressing in the works and the thickness change of speed generation person's handwriting of wieling the pen, the change of person's handwriting shape etc., to a kind of impression using brush writing of people; Also has a kind of three-dimensional model by setting up nib, the form of dynamic calculation nib and produce the algorithm of person's handwriting.The advantage of these software approachs to utilize existing computer entry device, such as mouse, writing pencil etc., be easy to promote, research and development and application cost lower.But regular software modeling algorithm, need the computer resource of consumption larger, especially use the software algorithm of the technical modelling such as three-dimensional, dynamic deformation writing brush to need a large amount of iteration floating-point operation, this just requires that computing machine has very high configuration, and simulated effect is undesirable.
Inventor finds under study for action, and the mode of software simulation calligraphy of the prior art exists and problem that simulated effect undesirable higher to hardware (as computing machine) configuration requirement.
Summary of the invention
In view of this, the object of the embodiment of the present invention is to provide the calligraphy person's handwriting based on optical principle to present system, to reduce the configuration requirement of hardware when calligraphy person's handwriting presents and to promote simulated effect.
Embodiments provide a kind of calligraphy person's handwriting based on optical principle and present system, comprising:
Handwriting pad, handwriting pad is light-passing board;
Based on the light source that the mode of handwriting pad generation image is arranged;
Be arranged at the display panels bottom handwriting pad;
For gathering the electro-optical imaging sensors of the calligraphy style of writing image on handwriting pad;
The image processing apparatus be all connected with electro-optical imaging sensors and display panels, image processing apparatus is used for the style of writing image that real-time collecting electro-optical imaging sensors gathers, and the style of writing image collected is processed, extract style of writing shape outline data, by style of writing shape profile Plotting data on painting canvas, and in the style of writing shape profile drawn Fill Color, to draw continuously and the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting, and painting canvas be transferred to display panels;
Display panels is used for presenting painting canvas;
Said system also comprises: the power supply of powering for light source, display panels, image processing apparatus and electro-optical imaging sensors, and supports the support of handwriting pad, light source, display panels and electro-optical imaging sensors.
Said system can also comprise: the writing brush write on the jotting surface, and the writing liquid of writing brush configuration is transparency liquid.
Said system also comprises: be arranged at the top layer cover plate on above-mentioned handwriting pad, above-mentioned handwriting pad is transparent acrylic, between this top layer cover plate and transparent acrylic, and be provided with leakage-proof ring above transparent acrylic surrounding, under transparent acrylic is embedded in top layer cover plate by leakage-proof ring, leakage-proof ring is waterproof washer or handwriting pad edge-pressing strip.
Light guide plate can be provided with below above-mentioned display panels; The both sides that light guide plate is relative or surrounding are configured with LCD backlight fluorescent tube, and LCD backlight fluorescent tube is arranged on support by LCD backlight fluorescent tube framework; Display panels also comprises liquid crystal display drive circuit plate and lcd power source circuit board, and liquid crystal display drive circuit plate, lcd power source circuit board and image processing apparatus are all arranged in same cabinet.
Above-mentioned electro-optical imaging sensors is the sensor that can obtain planar wave image; Above-mentioned handwriting pad is the handwriting pad with anti-fog function.
The mode that above-mentioned handwriting pad produces image can be projection pattern, and light source is evenly arranged around the top surrounding of handwriting pad, handwriting pad is provided with translucent projection screen.
The mode that above-mentioned handwriting pad produces image can be total internal reflection mode, and light source is strip-shaped light source, is symmetricly set on both sides or the surrounding of handwriting pad.
Above-mentioned light source can be infrared LED lamp.
Above-mentioned electro-optical imaging sensors can be provided with infrared-filtered mirror.
The mode that above-mentioned handwriting pad produces image is laser plane mode, and this light source is at least two wordline LASER Light Source, and LASER Light Source is symmetricly set on above the diagonal position of handwriting pad.
The system that the embodiment of the present invention provides gathers the style of writing image on handwriting pad by electro-optical imaging sensors, and by this image transmitting to image processing apparatus, style of writing outline data is obtained after image processing apparatus process, by this style of writing shape profile Plotting data on painting canvas, and draw style of writing shape profile in Fill Color, continuous drafting the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting, this painting canvas is presented on display panels, namely consistent calligraphy person's handwriting hand-written with user can be obtained, in implementation procedure, user still can use traditional writing brush, do not need the learning process of carrying out electronic pen, and the image simulation effectiveness comparison that this image based on optical principle collection and user truly write is close, hardware requirement is lower, be suitable for applying.
For making above-mentioned purpose of the present invention, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The calligraphy person's handwriting based on optical principle that Fig. 1 shows the embodiment of the present invention to be provided presents the structured flowchart of system;
Fig. 2 shows the calligraphy person's handwriting rendering method process flow diagram based on optical principle that the embodiment of the present invention provides;
The calligraphy person's handwriting based on total internal reflection mode that Fig. 3 shows the embodiment of the present invention to be provided presents the structured flowchart of system;
The calligraphy person's handwriting based on laser plane mode that Fig. 4 shows the embodiment of the present invention to be provided presents the structured flowchart of system;
The calligraphy person's handwriting based on projection pattern that Fig. 5 shows the embodiment of the present invention to be provided presents the structured flowchart of system.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
The calligraphy person's handwriting based on optical principle as shown in Figure 1 presents the structured flowchart of system, and this system comprises:
Handwriting pad 12, handwriting pad 12 is light-passing board;
Based on the light source 11 that the mode of handwriting pad generation image is arranged;
Be arranged at the display panels 13 of the bottom of handwriting pad 12;
For gathering the electro-optical imaging sensors 14 of the style of writing image on handwriting pad 12;
The image processing apparatus 15 be all connected with electro-optical imaging sensors 14 and display panels 13, the style of writing image that image processing apparatus 15 gathers for real-time collecting electro-optical imaging sensors 14, and the style of writing image collected continuously is processed, extract style of writing shape outline data, by this style of writing shape profile Plotting data on painting canvas, and draw style of writing shape profile in Fill Color, continuous drafting the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting, and this painting canvas is transferred to display panels 13;
Display panels 13 is for presenting above-mentioned painting canvas;
Said system also comprises: for the power supply of light source 11, display panels 13, image processing apparatus 15 and electro-optical imaging sensors 14 power supply (not shown in the figuresly to be anticipated out, this power supply can be multiple, the parts match that each power supply is powered with it), and support the support 16 of handwriting pad 12, light source 11, display panels 13 and above-mentioned electro-optical imaging sensors 14.
Connection in the embodiment of the present invention between all parts can be direct connection, also can be indirect connection, and concrete connected mode can be wired connection, also can be wireless connections.
Above-mentioned electro-optical imaging sensors 14 is the sensor that can obtain planar wave image, such as: camera, transparent red outer image sensor panel, flexible image sensor, photosensor arrays etc.
Above-mentioned handwriting pad 12 can be acrylic board or glass plate, and the thickness of handwriting pad is 5mm-10mm.Preferably, said system also comprises: be arranged at the top layer cover plate on above-mentioned handwriting pad 12, above-mentioned handwriting pad 12 is transparent acrylic, between this top layer cover plate and transparent acrylic, and be provided with leakage-proof ring above transparent acrylic surrounding, under this transparent acrylic is embedded in top layer cover plate by this leakage-proof ring, this leakage-proof ring is waterproof washer or handwriting pad edge-pressing strip.
Light guide plate is provided with below display panels 13, this light guide plate can be nanometer light guide plate, also can be common light guide plate, the both sides that light guide plate is relative or surrounding be configured with LCD backlight fluorescent tube, and LCD backlight fluorescent tube is arranged on support 16 by LCD backlight fluorescent tube framework; Display panels 13 also comprises liquid crystal display drive circuit plate and lcd power source circuit board, and liquid crystal display drive circuit plate, lcd power source circuit board and image processing apparatus 15 (as image procossing mainboard) is all arranged in same cabinet.
Based on said system, the calligraphy person's handwriting rendering method process flow diagram based on optical principle shown in Figure 2, the method comprises the following steps:
Step S202, electro-optical imaging sensors Real-time Collection user uses writing brush style of writing image on the jotting surface; Wherein, this handwriting pad is light-passing board, and the mode producing image based on this handwriting pad is provided with light source at handwriting pad correspondence position, and to make writing brush and handwriting pad surface of contact form image, this image can be shadow or speck; In addition, this handwriting pad also can be used as common touch-screen use, by the corresponding system of finger manipulation and software.
Step S204, the style of writing image of collection is sent to image processing apparatus by electro-optical imaging sensors.
Step S206, the above-mentioned style of writing image of image processing apparatus real-time collecting, and the style of writing image collected is processed, extract style of writing shape outline data, by this style of writing shape profile Plotting data on painting canvas, and in the style of writing shape profile drawn Fill Color, to draw continuously and the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting; Wherein, the color of this setting can be monochromatic, and also can be that multiple color is filled at random, can also be the color spread on paper according to the ink of algorithm simulation, the style of writing shape composition calligraphy handwriting image drawn continuously.
Step S208, above-mentioned painting canvas is presented on display panels by image processing apparatus.
The method of the present embodiment gathers the style of writing image on handwriting pad by electro-optical imaging sensors, and by this image transmitting to image processing apparatus, style of writing shape outline data is obtained after image processing apparatus process, by this style of writing shape profile Plotting data on painting canvas, and draw style of writing shape profile in Fill Color, continuous drafting the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting, this painting canvas is presented on display panels, namely consistent calligraphy person's handwriting hand-written with user can be obtained, in implementation procedure, user still can use traditional writing brush, do not need the learning process of carrying out electronic pen, and the image simulation effectiveness comparison that this image based on optical principle collection and user truly write is close, hardware requirement is lower, be suitable for applying.
Consider cleaning problems, the handwriting pad of the present embodiment preferably adopts water to replace traditional prepared Chinese ink, can certainly adopt that other is colourless, transparent, tasteless, nontoxic, the liquid of easy to clean.User can use traditional writing brush to write on the jotting surface, such user can obtain and on paper, write the same impression with writing brush, and the result produced is also closest to truly, and, tradition writing brush low price, category are numerous, user can select suitable writing brush according to the experience of oneself and custom, and therefore, the preferred traditional writing brush of the embodiment of the present invention is as handwritten instruments.Based on this, above-mentioned electro-optical imaging sensors Real-time Collection user uses writing brush style of writing image on the jotting surface to comprise: electro-optical imaging sensors to user by being moistened with transparency liquid (such as, water) the writing brush process of writing on the jotting surface carry out real time image collection, obtain the style of writing image of this writing brush and handwriting pad surface of contact.Select the mode that traditional writing brush and transparency liquid are write, considering when product design to allow liquid flow out as far as possible, above-mentioned handwriting pad can be obliquely installed, and bottom margin being provided with the diversion trench for being led away by the liquid writing use.Consider in writing process, liquid may form the globule on the jotting surface affects image quality, interference is produced to image acquisition, therefore handwriting pad is the handwriting pad doing surperficial antifog process, namely in the embodiment of the present invention, the handwriting pad with anti-fog function can be adopted, formed to stop or to reduce the globule.
Electro-optical imaging sensors in the embodiment of the present invention can be camera, in practical application, can choose that resolution is 640 × 480, frame per second is 120FPS, interface is the camera of USB2.0; If light source adopts infrared illumination, can also an infrared-filtered mirror be set before this camera.
In the present embodiment, handwriting pad produces the mode of image and comprises one of following: projection pattern, total internal reflection mode and laser plane mode.For different image modes, need different light source compositions, the light source range of choice of projection pattern is relatively wider, can use the various modes such as pointolite, fluorescent tube, LED lamp bar, as long as uniform illumination handwriting pad is just passable, it should be noted that light must from four circumferential center uniform irradiations, in order to avoid the shade of the noncontact face of generation object, such as penholder, the shade of hand etc., so light source is generally arranged in handwriting pad surrounding, such as, the rectangle frame of fluorescent tube or LED lamp bar composition.
Total internal reflection mode, needs to place strip-shaped light source at the edge (being at least two limits) of handwriting pad, LED light band or striation more applicable.
Laser plane mode needs use one wordline LASER Light Source, the distance that the light face that laser produces is parallel with handwriting pad and not far above it, during in order to prevent writing brush or finger contact touch pad, the face of backlight produces shade, this wordline LASER Light Source at least needs two, is placed on handwriting pad respectively on angle point.
The mode producing image for handwriting pad is different, choosing with position of light source is also different, such as: the mode that handwriting pad 12 produces image is projection image's mode, and light source 11 evenly can be arranged above the surrounding of handwriting pad 12, and handwriting pad 12 is provided with translucent projection screen.The mode that handwriting pad 12 produces image is total internal reflection mode, and light source 11 is strip-shaped light source, and be symmetricly set on both sides or the surrounding of handwriting pad 12, handwriting pad surrounding wants glossy clear, is provided with nanometer light guide plate below display panels 13.Light source 11 under these three kinds of imaging modality can be infrared LED lamp.Based on this, electro-optical imaging sensors 14 is provided with infrared-filtered mirror.
Above-mentioned image processing apparatus can be computing machine, also can be the graphic processing circuit plate of customized development.
In total internal reflection mode, calligraphy person's handwriting based on total internal reflection mode shown in Figure 3 presents the structured flowchart of system, this system comprises: top layer cover plate 31, waterproof washer 32, handwriting pad 33 (can be the high transparency acrylic board that 8mm is thick), the infrared LED lamp bar 34 of 850nm, the lamp bar framework 35 of infrared LED, handwriting pad support 36, display panels 37, liquid crystal panel and light guide plate support 38, nanometer light guide plate 39, LCD backlight fluorescent tube 40, LCD backlight fluorescent tube framework 41, camera 42, computer motherboard 43, liquid crystal display drive circuit plate 44, lcd power source circuit board 45, cabinet 46 and support table 47.The installation process of this system comprises: by camera 42, computer motherboard 43, liquid crystal display drive circuit plate 44, lcd power source circuit board 45 is fixed on bottom cabinet 46, LCD backlight fluorescent tube 40 is positioned in LCD backlight fluorescent tube framework 41, nanometer light guide plate 39 is close to LCD backlight fluorescent tube 40 and the LCD backlight fluorescent tube framework 41 on both sides, then they are put into together the groove below liquid crystal panel and light guide plate support 38, groove above liquid crystal panel and light guide plate support 38 places display panels 37, the accessory this combined puts into cabinet 46, be stuck in the ladder place above cabinet, infrared LED lamp bar 34 is inserted lamp bar framework 35 and is inserted in handwriting pad 33 both sides, then they are put into the groove of handwriting pad support 36, the handwriting pad accessory this combined puts into cabinet 46, be positioned at above liquid crystal combination accessory, then waterproof washer 32 is positioned over above handwriting pad 33, be fixed by top layer cover plate 31, all devices are assembled in cabinet 46, then cabinet 46 is positioned in the desktop square hole of support table 47, the extension of cabinet 46 top hangs over recess under the square hole edge of desktop, and it is fixing, top layer cover plate 31 is concordant with desktop.
In laser plane mode, the calligraphy person's handwriting based on laser plane mode shown in Figure 4 presents the structured flowchart of system, and this system comprises: top layer cover plate 51, handwriting pad edge-pressing strip 52, word planar laser head 53, its frequency: 850nm, power: 5mW.Handwriting pad 54, high transparency acrylic board as thick in 5mm; Handwriting pad support 55, display panels 56, liquid crystal panel and light guide plate support 57, nanometer light guide plate 58, LCD backlight fluorescent tube 59, LCD backlight fluorescent tube framework 60, camera 61, computer motherboard 62, liquid crystal display drive circuit plate 63, lcd power source circuit board 64, cabinet 65 and support table 66.The installation process of this system is as follows: by camera 61, computer motherboard 62, liquid crystal display drive circuit plate 63, lcd power source circuit board 64 is fixed on bottom cabinet 65, LCD backlight fluorescent tube 59 is positioned in LCD backlight fluorescent tube framework 60, nanometer light guide plate 58 is close to LCD backlight fluorescent tube 59 and the LCD backlight fluorescent tube framework 60 on both sides, then they are put into together the groove below liquid crystal panel and light guide plate support 57, groove above liquid crystal panel and light guide plate support 57 places display panels 56, the accessory this combined puts into cabinet 65, be stuck in the ladder place above cabinet 65, handwriting pad 54 is positioned in the groove above handwriting pad support 55, laser head 53 is put into respectively the semicircle groove at handwriting pad support 55 4 angles, handwriting pad edge-pressing strip 52 is stuck in above handwriting pad support 55, form a whole, and adjust the direction of laser head 53, the handwriting pad accessory this combined puts into cabinet 65, be fixed with top layer cover plate 51, all devices are assembled in cabinet 65, then cabinet is positioned in the desktop square hole of support table 66, the extension of cabinet 65 top hangs over recess under the edge of desktop square hole, and it is fixing, top layer cover plate 51 is concordant with desktop.
For projection pattern, calligraphy person's handwriting based on projection pattern shown in Figure 5 presents the structured flowchart of system, this system comprises: top layer cover plate 71, the infrared LED lamp bar 72 of 850nm, even smooth light shield 73, handwriting pad fixed frame 74, waterproof washer 75, translucent projection screen 76, handwriting pad 77 (can be the high transparency acrylic board that 5mm is thick), handwriting pad support 78, display panels 79, liquid crystal panel and light guide plate support 80, nanometer light guide plate 81, LCD backlight fluorescent tube 82, LCD backlight fluorescent tube framework 83, camera 84, computer motherboard 85, liquid crystal display drive circuit plate 86, lcd power source circuit board 87, cabinet 88 and support table 89.The installation process of this system: by camera 84, computer motherboard 85, liquid crystal display drive circuit plate 86, lcd power source circuit board 87 is fixed on bottom cabinet 88, LCD backlight fluorescent tube 82 is positioned in LCD backlight fluorescent tube framework 83, nanometer light guide plate 81 is close to LCD backlight fluorescent tube 82 and the LCD backlight fluorescent tube framework 83 on both sides, then they are put into together the groove below liquid crystal panel and light guide plate support 80, groove above liquid crystal panel and light guide plate support 80 places display panels 79, the accessory this combined puts into cabinet 88, be stuck in the ladder place in the middle part of cabinet, by handwriting pad 77, translucent projection screen 76, waterproof washer 75 is positioned in the groove on handwriting pad support 78 top in order, this assembly is placed in cabinet 88, be positioned at above liquid crystal combination accessory, by handwriting pad fixed frame 74, handwriting pad 77 and Liquid crystal module are pressed abd fixed in the middle part of cabinet 88, by infrared LED lamp bar 72, even smooth light shield 73 is arranged in cabinet 88 upper inner surrounding, near coboundary, top layer cover plate 71 is fixed on cabinet 88 top, all devices are assembled in cabinet 88, then cabinet 88 is positioned in the square hole of desktop, the extension of cabinet 88 top hangs over recess under the desktop square hole edge of support table 89, and it is fixing, top layer cover plate 71 is concordant with desktop.
Fig. 3 can be divided into three parts to all parts of system shown in Figure 5: handwriting pad (being assembled on handwriting pad support), liquid crystal (being assembled on liquid crystal panel and light guide plate support), mainboard (being assembled into bottom cabinet), for Fig. 3, handwriting pad 33, infrared LED lamp bar 34, lamp bar framework 35 can become one and be arranged on handwriting pad support 36; Display panels 37, nanometer light guide plate 39, LCD backlight fluorescent tube 40 and LCD backlight fluorescent tube framework 41 integratedly can be arranged on liquid crystal panel and light guide plate support 38, display panels 37 is on liquid crystal panel and light guide plate support 38 upper strata, and all the other are in the lower floor of liquid crystal panel and light guide plate support 38.Camera 42, computer motherboard 43, liquid crystal display drive circuit plate 44 and lcd power source circuit board 45 can be integrated in cabinet 46.
Fig. 3 can be desk to the support table that system shown in Figure 5 illustrates, its concrete structure can design according to all parts in real system, is advisable, no longer describes in detail here so that volume is moderate.
Consider generally, the resolution of electro-optical imaging sensors may not be identical with the resolution of display panels, and because the viewfinder range of electro-optical imaging sensors is uncertain and the factor impact such as the pattern distortion of electro-optical imaging sensors, if require that the position of display overlaps completely with hand-written position, then need the mapping relations set up between handwriting area and viewing area.Based on this, said method also comprises: calibrate handwriting pad and display panels according to the resolution of electro-optical imaging sensors and the resolution of display panels in advance, set up the mapping relations between handwriting area and viewing area.
Take display panels as display panels be example, here calibration only can calibrate four angle points of handwriting pad and display panels, also grid type calibrating mode can be adopted, namely not only quadrangular four points, the grid of equidistant division M capable and N row on display panels, each point of crossing on grid is calibration point, the line number (M) of grid and columns (N) need to determine according to the degree of distortion of electro-optical imaging sensors, grid number is more, the corresponding relation of handwriting pad and display panels is more accurate, but the difficulty that operation realizes is larger.The mode considering to be gathered image by multiple electro-optical imaging sensors is needed, for the soft splicing of image reserves the calibration point of transitional region during stress and strain model.Based on this, above-mentionedly according to the resolution of electro-optical imaging sensors and the resolution of display panels, calibration is carried out to handwriting pad and display panels in advance and can comprise: in advance according to the resolution of electro-optical imaging sensors and the resolution of display panels, adopt grid type calibrating mode to calibrate handwriting pad and display panels.
Because electro-optical imaging sensors (such as: camera) and subject need certain distance (object distance), therefore, sharpness for the hand-written panel shooting of large-size can be lower, or although hand-written panel is little, but in order to reduce object distance as far as possible, thus reduce the thickness of product, multiple electro-optical imaging sensors then can be used to take simultaneously, each electro-optical imaging sensors is responsible for a part of region, normally according to row, row arrange electro-optical imaging sensors, the rectangular area of each electro-optical imaging sensors shooting equal areas, the image mosaic that all electro-optical imaging sensors are taken by needs when image acquisition is a complete handwriting area image, the method of splicing has two kinds, one fights recklessly to connect, be exactly simply the image mosaic of each electro-optical imaging sensors, this needs electro-optical imaging sensors position, it is more accurate that angles etc. adjust, otherwise the image between adjacent photo imageing sensor may have overlap or gap, another joining method is soft splicing, when splicing exactly, a transitional region is marked between the image of adjacent photo imageing sensor, image from the image morphing of an electro-optical imaging sensors to another electro-optical imaging sensors, even if electro-optical imaging sensors position some deviation a little like this, splice the image and also do not have saltus step clearly.Based on this, above-mentioned image processing apparatus real-time collecting style of writing image, and carry out process can comprise collecting style of writing image continuously: when image processing apparatus receives the style of writing image sent from multiple electro-optical imaging sensors, image processing apparatus is according to the position relationship of each electro-optical imaging sensors, splicing is carried out to the style of writing image received, obtains complete style of writing image.This mode can reduce the object distance of taking, thus reduces the thickness of product, and the image obtained is more clear.
In embody rule, style of writing image described in image processing apparatus real-time collecting, the style of writing image collected is processed, extract style of writing shape outline data can also comprise: according to the installation direction of electro-optical imaging sensors and the display direction of display panels, image processing apparatus determines whether that the style of writing image to collecting carries out mirror image processing, if so, mirror image processing is carried out to style of writing image; Then successively the style of writing image after mirror image processing is carried out to background subtraction process, Fuzzy Processing, high-pass filtering process, amplifies process and binary conversion treatment, extract style of writing shape outline data.
Because the direction that electro-optical imaging sensors is installed may be inconsistent with the display direction of display panels, in order to the quick direction by them is adjusted to consistent, adds mirror image processing in searching method, pass through the method, by obtain image mirrors reversion so that with display images match.The kind of mirror image has left and right mirror image and upper and lower mirror image, also can perform up and down and left and right mirror image simultaneously.
Above-mentioned background subduction refers to remove background frame from the picture electro-optical imaging sensors shooting, and only retain foreground picture, here said prospect is exactly style of writing image.Before writing beginning, the picture of a width electro-optical imaging sensors shooting can be preserved as a setting, in writing process, by pixel subtraction this background frame be deducted and just obtain only promising picture.Because background frame also may change, dynamic background can be adopted to remove algorithm, for the consideration of real-time, the method comparison adopted is simple and quick, just each picture is added on background frame by weighted value, then reduce, if the image remained unchanged within a period of time will think background, will be wiped out.
Above-mentioned binaryzation refers to image is converted into the image only including black and white two kinds of colors, so just can carry out follow-up style of writing contours extract and relevant evaluation work, during binaryzation, first need to determine a threshold value, color relation higher than this threshold value thinks white, just thinks black, so white expression prospect lower than this threshold value, namely style of writing image, black represents background.
Because the resolution of electro-optical imaging sensors may be lower, the sawtooth at edge can be seen when the image got shows on display panels, based on this, Fuzzy Processing is added in said method, in order to remove these sawtooth, make the smooth of the edge, so also referred to as smooth algorithm, the smooth algorithm usually adopted is the simplest uniform smooth algorithm.
Above-mentioned high-pass filtering process is filtered according to color value by picture, by the pixel filtering of color value lower than certain threshold value, retains the pixel higher than this threshold value.Which main application is the interference of removing part background and context light.
The implication of above-mentioned amplification process is scaled up by color value, exactly the color value of each pixel is multiplied by a coefficient, makes the contrast of image strengthen like this, be convenient to next step binary conversion treatment.
Through above pattern algorithm, can obtain style of writing image more clearly, the algorithm steps that it should be noted that above is not each step is all necessary, such as mirror algorithm, does not just need when the image that electro-optical imaging sensors obtains is consistent with displaying contents direction.
Style of writing shape profile Plotting data comprises by above-mentioned image processing apparatus on painting canvas: image processing apparatus carries out status tracking by the time between the style of writing shape that calculates the corresponding different frame of described style of writing shape outline data and position relationship, obtain the lifting of style of writing, down state data, thus interpretation goes out beginning and the end of a stroke; Image processing apparatus, according to the result of interpretation, operates the contour interpolation that adjacent two style of writing shape outline datas of same unicursal carry out Shape-based interpolation distortion according to density, increases style of writing shape; Image processing apparatus is according to by which on the style of writing shape profile Plotting data to painting canvas after interpolation, image processing apparatus is according to the density degree of adjacent two style of writing points of same unicursal, the operation of style of writing point interpolation is carried out by figure deformation method, the stroke gone out to make drawing is smoothly continuous, is not interrupted.
The fundamental purpose of above-mentioned style of writing status tracking carries out trace analysis to the behavior state of pen, continuous print style of writing shape image is converted into felt pen event, such as pen is depressed, move, the event such as to lift, due to the shape image that said method is based on style of writing, therefore said method can obtain the image that writing brush is formed on hand-written platform, the status information such as can not obtain the pressure of pen, lift.Based on this, the present embodiment is when analysis state follows the tracks of event information, mainly judged by time and position relationship between the style of writing shape that calculates different frame, safeguard list object, when finding that there is new style of writing shape, if certain in position and list is close, then think that same pen is moving, if the object in list does not find in new style of writing shape, then think that this stroke writes end, pen lifts, if new style of writing shape is not in a list object, then thinks a new pen pressure.
Due to the relative position of above-mentioned tracking Main Basis different time style of writing, therefore, when writing, translational speed can not be too fast, otherwise there will be broken string or connect a situation generation, if want writing speed to accelerate, need to improve the frame per second of electro-optical imaging sensors and the processing speed of image processing apparatus.
Frame per second due to electro-optical imaging sensors is not very high usually, iff relying on the style of writing arbitrary shape person's handwriting obtained, then there will be that person's handwriting is unsmooth even to break, in order to avoid there is this phenomenon, interpolation operation is added in said method, be exactly between two style of writing shapes, insert the style of writing figure of right quantity according to the distance of these two style of writing Penrose's shape distance.Because what get in said method is the figure of style of writing, interpolation also should be the figure of style of writing, because the shape of the figure of interpolation starting point and terminal is all likely different with size, therefore, how interpolation is a problem, and the present embodiment is considered to use shape animation deformation algorithm to realize this interpolation, the former figure using the shape of interpolation starting point as distortion, the shape of interpolation terminal is as the target figure be out of shape, and the number of interpolation is then the step number of distortion.Therefore, X-Y scheme deformation algorithm can be selected.
After getting style of writing shape image and interpolation image, just define complete handwriting image together as long as added up to be plotted in by these images.This is a very easy thing for present GUI programmes, no matter use the API that operating system provides, as the GDI of Microsoft, or third party's general graphical development library, as OpenGL, can easily realize, example is programmed for: first need establishment painting canvas with GDI+, then trigger according to the event of style of writing, each style of writing shape is drawn according to the style of writing information data of coming with event transfer when pen is pressed and move, during drafting, all points on style of writing shape profile are linked in sequence into a path, then fill path function is called by style of writing arbitrary shape on painting canvas, the color of filling can change as required, finally painting canvas is shown and just can see the person's handwriting write.
Said method can be applied to the environment that the soft pen of any needs is write, such as: pupil practices calligraphy, calligraphy professional person practices calligraphy or create calligraphy, soft pen drawing etc.
Provide the optimum implementation procedure of method of above-described embodiment below, can be as described below:
1. Scheme Choice
First, consider that written form uses traditional writing brush to dip in water to write, and total internal reflection mode has very high contrast when there being the soft object of water to touch dull and stereotyped, image is very clear, this handwriting pad is transparent, and the content represented for display device below is not blocked completely.Secondly, in the embodiment of the present invention, wishing can integrative display equipment, because we use traditional writing brush to dip in water and write, it is alike that form and current water all the fashion write cloth, by increasing displaying contents, user can copy with reference to the rubbings of display, and can preserve the works write.Based on this point requirement, select infrared light sources, in the selection of display device, select display panels as display device, this just requires that handwriting pad is as far as possible transparent, avoid blocking displaying contents, the style of writing image definition of formation is accurate, and the total internal reflection mode not having light to block by chance meets these needs.Based on above analysis, selected total internal reflection mode is carried out.
2. hardware installation
After scheme is determined, determine hardware material and assembling, can use the angle bar setting support that combined goods shelf is used, the benefit of this mode is that material easily obtains, with low cost, integrated mode flexible, can build the structure of needs as playing with building blocks;
Select acrylic as handwriting pad material, thickness can be the acrylic board of 5mm, 8mm and 10mm, because plan uses total internal reflection mode, need the edge input light from acrylic, therefore, glossy clear is wanted at the edge of acrylic board, can use cut;
Select 850nm paster infrared LED as light source, each chip current 150ma, by these chips welding on four aluminium bases, the length of aluminium base is identical with acrylic four limit, then aluminium base is inserted in aluminium groove, with adhesive tape, these aluminium grooves are fixed on the surrounding of acrylic, the power lead of extraction is connected on output end of stabilized voltage supply, this creates the terminal the handwriting pad of total internal reflection mode;
Display device aspect, can adopt display panels, and it is equipped with illuminating lamp tube and nanometer light guide plate, can illuminate liquid crystal panel like this, and image of identifying the handwriting again does not have a significant effect;
Electro-optical imaging sensors has selected the camera of a 120 frames/second, and in cam lens, increase 850nm bandpass filter, and only allow 850nm infrared light enter camera, camera is connected by USB interface with image processing apparatus.
Image processing apparatus selects computing machine.
3. software development
Carry out image acquisition and process with computer mode, this mode construction cycle is the shortest, programming resource is abundanter, can verify feasibility and the effect of electronic handwritten platform method described herein more rapidly.According to the above-mentioned process operation of image processing apparatus, service end and client two programs can be divided into: service end and client.Service end is just as device drives, be responsible for extracting brush stroke data from the image of camera shooting, and these data are sent to client application, its function mainly comprised has: the splicing of image acquisition, multi-cam, calibration and mapping, image procossing, data transmission etc.Serve end program also can be all transplanted to independently in embedded equipment; Client then obtains the brush stroke data that service end is sent, and is touch event by these data transformations, and trigger application and to paint out calligraphy work, the major function of client is: data receiver, status tracking, contour interpolation, person's handwriting drafting etc.
The method of above embodiment gathers the style of writing image on handwriting pad by electro-optical imaging sensors, and by this image transmitting to image processing apparatus, calligraphy brush stroke data is obtained after image processing apparatus process, again these data are processed to the style of writing shape profile obtained on painting canvas, then Fill Color in this profile, this painting canvas is presented on the display apparatus, namely consistent calligraphy person's handwriting hand-written with user can be obtained, in implementation procedure, user still can use traditional writing brush or other soft pen, do not need the learning process of carrying out electronic pen, and the image simulation effectiveness comparison that this image based on optical principle collection and user truly write is close, hardware requirement is lower, be suitable for applying.
In several embodiments that the application provides, should be understood that disclosed system and method can realize by another way.Embodiment of the method described above is only schematic, if the function of described image processing apparatus using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random AccessMemory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (10)
1. the calligraphy person's handwriting based on optical principle presents a system, it is characterized in that, comprising:
Handwriting pad, described handwriting pad is light-passing board;
Based on the light source that the mode of described handwriting pad generation image is arranged;
Be arranged at the display panels bottom described handwriting pad;
For gathering the electro-optical imaging sensors of the calligraphy style of writing image on described handwriting pad;
The image processing apparatus be all connected with described electro-optical imaging sensors and described display panels, described image processing apparatus is used for the described style of writing image that described in real-time collecting, electro-optical imaging sensors gathers, and the described style of writing image collected is processed, extract style of writing shape outline data, by described style of writing shape profile Plotting data on painting canvas, and draw style of writing shape profile in Fill Color, continuous drafting the style of writing shaped wheel profile of Fill Color becomes calligraphy person's handwriting, and described painting canvas is transferred to display panels;
Described display panels is used for presenting described painting canvas;
Described system also comprises: the power supply of powering for described light source, described display panels, described image processing apparatus and described electro-optical imaging sensors, and the support supporting described handwriting pad, described light source, described display panels and described electro-optical imaging sensors.
2. system according to claim 1, is characterized in that, described system also comprises: the writing brush write on described handwriting pad, and the writing liquid of described writing brush configuration is transparency liquid.
3. system according to claim 1, it is characterized in that, described system also comprises: be arranged at the top layer cover plate on described handwriting pad, described handwriting pad is transparent acrylic, between described top layer cover plate and described transparent acrylic, and being provided with leakage-proof ring above described transparent acrylic surrounding, under described transparent acrylic is embedded in described top layer cover plate by described leakage-proof ring, described leakage-proof ring is waterproof washer or handwriting pad edge-pressing strip.
4. system according to claim 3, is characterized in that, is provided with light guide plate below described display panels; The both sides that described light guide plate is relative or surrounding are configured with LCD backlight fluorescent tube, and described LCD backlight fluorescent tube is arranged on described support by LCD backlight fluorescent tube framework; Described display panels also comprises liquid crystal display drive circuit plate and lcd power source circuit board, and described liquid crystal display drive circuit plate, described lcd power source circuit board and described image processing apparatus are all arranged in same cabinet.
5. system according to claim 1, is characterized in that, described electro-optical imaging sensors is the sensor that can obtain planar wave image;
Described handwriting pad is the handwriting pad with anti-fog function.
6. system according to claim 1, is characterized in that, the mode that described handwriting pad produces image is projection pattern, and described light source is evenly arranged around the top surrounding of described handwriting pad, and described handwriting pad is provided with translucent projection screen.
7. system according to claim 1, is characterized in that, the mode that described handwriting pad produces image is total internal reflection mode, and described light source is strip-shaped light source, is symmetricly set on both sides or the surrounding of described handwriting pad.
8. the system according to claim 6 or 7, is characterized in that, described light source is infrared LED lamp.
9. system according to claim 8, is characterized in that, described electro-optical imaging sensors is provided with infrared-filtered mirror.
10. system according to claim 1, is characterized in that, the mode that described handwriting pad produces image is laser plane mode, and described light source is at least two wordline LASER Light Source, and described LASER Light Source is symmetricly set on above the diagonal position of described handwriting pad.
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