KR100892367B1 - Apparatus and Method for digital rubbing - Google Patents

Abstract

According to an aspect of the present invention, there is provided a digital tabletop device, comprising: a paint plate which detects a position of an electronic pencil and transmits an output signal corresponding to each pixel to the electronic pencil according to the coordinates of a two-dimensional digital graphic image embedded therein; It consists of an electronic pencil that receives the output signal from the paint plate and prints the graphic image on paper so that the two-dimensional digital graphic image coincides with the absolute coordinate on the XY plane. According to the present invention, when a paper is placed on a physical concave-convex pattern and rubbed with ink or a pencil, such as a tabletop or rubbing technique, the pattern is transferred to paper, so that a two-dimensional digital graphic image embedded in a paint board is used using an electronic pencil. You can output directly on the paper to be printed so that the absolute coordinates on the XY plane coincide.

Digital desktop, handheld printer

Description

Apparatus and Method for digital rubbing}

1 is a view for explaining a traditional tabletop or rubbing method;

2 is a view for explaining the concept of a digital tabletop according to the present invention;

3 is a block diagram illustrating a digital tabletop device according to the present invention;

4 is an operation flowchart of the digital table book apparatus according to FIG. 3;

5 and 6 illustrate an embodiment according to the block diagram of FIG. 3;

7 and 8 show another embodiment according to the block diagram of FIG. 3;

9 is a view for explaining a modification of the digital tabletop device according to the present invention;

10 is a flowchart of operation of the digital tabletop device according to FIG. 9;

11 is a diagram showing an example of a digital desktop created using the present invention.

<Description of reference numbers for the main parts of the drawings>

110: paint 112: electronic pencil position recognition means

113: information processing means 114: image storage means

115: control signal transmission means 119: housing

120: paper 130: electronic pencil,

132: location transmitting means 133: marking means

134: actuator 135: control signal receiving means

160: picture card 161: RFID tag

162: ID recognition means

TECHNICAL FIELD The present invention relates to a tabletop device and method, and more particularly, to a digital tabletop device and method.

In the traditional tabletop or scrubbing method, as shown in FIG. 1, the paper 20 is placed on the physical uneven pattern 10, and then the uneven pattern 22 is transferred onto the paper 20 by rubbing with ink or pencil 30.

Digital rubbing is a digitization of traditional rubbing or scrubbing, and as shown in FIG. 2, a flat paint plate 110 having a two-dimensional digital graphic image embedded therein instead of an object having a physical uneven pattern imprinted on the surface thereof. The paper 120 is placed thereon and rubbed with an electronic pencil 130 to transfer the graphic image 122 directly onto the paper 120.

Conventional inventions similar to digital tabletops include hand-held printers that hold hands and output images directly on paper. Many inventions of handheld printers already exist. Among them, related inventions were examined and differences from the present invention were considered.

Yamada (US Pat. No. 5,927,872) proposed a method of printing by measuring the relative displacement of a handheld printer while moving the surface of the paper while printing using an optical sensor. The position change of the handheld printer was captured in real time using navigation information obtained from the light sensor. Printed paper surface images are captured at regular intervals. The optical sensor detects the feature points of the shadows reflected from the paper surface or minute pattern changes, and calculates the movement of the handheld printer based on this.

Saund (US Pat. No. 6,517,266 B2) proposed a handheld printer capable of printing stored images on the surface of a white board. The printer system has a marking mechanism consisting of at least one print head. The global positioning system detects the position of at least one print head and based on this, the control unit operates the print head. Another implementation includes a local positioning system that can locate the print head relative to the print surface.

Denoue et al. (US Pat. No. 6,773,177 B2) proposed a method of supporting context-aware freeform printing when the source image space in the source media and the target image space in the target media are defined. . The image selected in the source image space is copied or optionally processed and delivered to the target image space. The controller captures the selected source image and stores the image in the memory. The image is optionally processed, formatted and output. The controller formats the processed image to fit the target image space by adjusting the rendering of the processed image to fit the target media when the printing device moves the target image space to the preform. The controller predicts the preform direction through which the print head passes by adjusting the image to match the predicted preform direction as the movement of the print head is detected.

Bobry (US Pat. Nos. 5,593,236, 5,988,900) devised an all-in-one handheld printer capable of printing indicia on printed surfaces such as envelopes or paper. The printer has several ink nozzles and the controller detects movement during printing and calibrates to minimize distortion in the output image. In addition, the present invention has been developed and applied for a new patent (US Pat. No. 6,229,565), in which a digital camera and a printing unit are integrated to design an apparatus capable of scanning and printing an image printed on paper and outputting it back to paper.

Kagayama et al. (US Pat. No. 5,861,877) proposed an electronic pen capable of inputting and outputting data directly on paper, similar to a general pen. The device can be used with external data processing devices such as small notebook PCs. Letters written with the electronic pen are recognized by the external data processing device, and the input letters can be directly output to a desired position on the paper by the electronic pen. The electronic pen has a positioning interface, an output interface consisting of an inkjet printhead, and a communication unit with an external data processor.

Doberenz (US Pat. No. 6,626,593 B2) constructed a circuit for causing ink to be dispensed based on an ink dispenser, a switch for generating an initial position signal, a motion sensor for generating a motion signal, and image data / initial position / motion signal. The pen printer sweeps through the printed surface and the printer calculates its movement in pixels and prints the image directly on the ground.

Alles et al. (US Pat. No. 4,211,012) proposed a handheld printer capable of printing text while moving the ground through the control of a separate signal processor. As the printer sweeps through the ground, a built-in nib enables the printer to print relatively dense patterns by moving up and down or rotating the ground and moving up and down according to image signals.

As mentioned above, many handheld printers have been devised to date and are commercially available, such as PrintDreams ^™ 's Xyron Design Runner ^™ . Handheld printers are literally focused on converting desktop printers to handheld printers, and can improve the directness and convenience of printing compared to desktop printers by allowing the source image to be output at the desired location on the desired target media. have. However, most handheld printers have a different structure from desktop printers because they have to be held in hand, but in terms of printers, they can be said to have inherited the uses and concepts of conventional desktop printers.

The difference between digital tabletop printing through conventional handheld printers is that the source image space and the target image space match on the XY plane, and each pixel of the source image and the target image is the same relative to the absolute coordinates on the XY plane. . In other words, the graphic information of the paint board directly below is copied onto the paper.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a digital tabletop apparatus and method in which a new concept of digital tabletop has been applied to the above-described concept of printing.

In accordance with another aspect of the present invention, there is provided a digital tabletop device, on which a two-dimensional digital image is stored, a paper is placed on a paint plate, and the paper is rubbed with an electronic pencil. Regarding the digital tabletop device for transferring the absolute coordinates,

The electronic pencil includes a position transmitting means, a control signal receiving means, an actuator driven according to the control signal when a control signal is input to the control receiving means, and a marking for printing an image on the paper by driving of the actuator. With means;

The paint plate, the electronic pencil position recognition means for receiving the signal from the position transmitting means of the electronic pencil to determine the position of the electronic pencil, image storage means for storing the two-dimensional digital image, the electronic pencil position recognition Information for calculating the print output coordinates from the current position coordinates of the electronic pencil determined by the means in consideration of the total system delay, and for calculating the print output signals by referring to the pixels of the print output coordinates in the two-dimensional digital image in the image storage means. And a control signal transmitting means for transmitting the control signal to the control signal receiving means of the electronic pencil when there is a change in the print output signal of the information processing means.

The print output coordinates (X, Y) by the information processing means is assuming that the current position coordinates of the electronic pencil is (Xo, Yo),

It can be calculated as Velocity_X and Velocity_Y are the velocity of the electronic pencil in the current position coordinates (Xo, Yo), and Acceleration_X and Acceleration_Y are the accelerations of the electronic pencil between the current position coordinates (Xo, Yo) and the printout coordinates (X, Y). Where Td is the overall system delay.

The paint plate may further include an ID recognition means of an RFID tag, in which case the information processing means loads and loads an image corresponding to the ID of the RFID tag recognized through the ID recognition means from the image storage means. Used to calculate the printout signal.

In accordance with another aspect of the present invention, there is provided a digital sample method for placing a paper on a paint plate on which a source image is stored and rubbing the paper with an electronic pencil to transfer the source image to the paper.

A first step of recognizing an electronic pencil position on the paint board;

A second step of calculating a print output coordinate in consideration of the total delay time in the current position coordinate of the electronic pencil;

Calculating a print output signal by referring to the source image pixel corresponding to the print output coordinate;

Transmitting a control signal to the electronic pencil if there is a change in the print output signal, and returning to the first step of recognizing a position of the electronic pencil in the paint plate if there is no change in the print output signal;

A fifth step of driving an actuator installed in the electronic pencil with the control signal; And

And a sixth step of transferring the source image onto the paper so that the absolute coordinates on the XY plane coincide with each other by the driving means of the actuator.

When the print output coordinate is (X, Y) and the current position coordinate of the electronic pencil is (Xo, Yo), the print output coordinate (X, Y) in the second step is

It can be calculated as Velocity_X and Velocity_Y are the velocity of the electronic pencil in the current position coordinates (Xo, Yo), and Acceleration_X and Acceleration_Y are the accelerations of the electronic pencil between the current position coordinates (Xo, Yo) and the printout coordinates (X, Y). Where Td is the overall system delay.

The method may further include placing a picture card embedded with an RFID tag between the paint plate and the paper before placing the paper on the paint plate, in this case, before the first step of recognizing the position of the electronic pencil. The method may further include loading, by the paint plate, the ID of the RFID tag and loading a source image corresponding thereto, and calculating the print output signal in the third step by referring to the source image corresponding to the ID of the RFID tag.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. The following examples are only presented to understand the content of the present invention, and those skilled in the art will be capable of many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be construed as limited to these embodiments.

3 is a block diagram illustrating a digital tabletop device according to the present invention, and FIG. 4 is an operation flowchart of the digital tabletop device according to FIG. 3. Referring to FIGS. 3 and 4, the digital tabletop device includes an electronic pencil 130 and a paint plate 110. The electronic pencil 130 has a shape like a pencil and includes a position transmitting means 132, a marking means 133, an actuator 134, a control signal receiving means 135, and the paint plate 110 has an electronic pencil. Position recognition means 112, information processing means 113, image storage means 114, and control signal transmission means 115.

The image storage means 114 in the paint plate 110 stores a two-dimensional digital image. When the electronic pencil 130 is placed on the paper 120 placed on the paint plate 110, the paint plate 110 in the position transmitting means 132 of the electronic pencil 130 through the electronic pencil position recognition means 112 It receives the signal coming out to determine the location of the electronic pencil and transmits it to the information processing means (113) (S10).

The information processing means 113 prints out from the current position coordinates Xo and Yo of the electronic pencil 130, which are grasped by the electronic pencil position recognition means 112, in consideration of the overall system delay occurring up to the marking mechanism operation. The coordinates (X, Y) are calculated (S20), and the printout signal is calculated by referring to the pixels of the printout coordinates (X, Y) in the source image in the image storage unit 114 (S30).

The calculation of the print output coordinates (X, Y) is calculated using a dead reckoning algorithm as follows by applying the respective operation delay time Td measured according to the on and off states of the actuator 134. .

여기서, Velocity_X와 Velocity_Y는 현재 위치좌표(Xo,Yo)에서의 전자연필의 속도이고, Acceleration_X와 Acceleration_Y는 현재 위치좌표(Xo, Yo)와 인쇄출력좌표(X,Y) 사이에서의 전자연필의 가속도이며, Td는 총체적인 시스템 지연이다.

Velocity_X and Velocity_Y are the velocity of the electronic pencil in the current position coordinates (Xo, Yo), and Acceleration_X and Acceleration_Y are the accelerations of the electronic pencil between the current position coordinates (Xo, Yo) and the printout coordinates (X, Y). Where Td is the overall system delay.

When the print output coordinates X and Y to be actually output are calculated, the print output signal is calculated by referring to the pixels of the corresponding coordinates X and Y of the source image in the image storage unit 114.

When there is a change in the print output signal of the information processing means 113, the control signal is transmitted to the electronic pencil 130 through the control transmission means 115. The control signal receiving means 135 of the electronic pencil 130 receives the control signal and drives the actuator 134 (S60). The marking means 133 prints an image on the paper 120 by driving the actuator 134 (S70).

According to the present invention, the paper 120 is placed on the paint plate 110 as described above, and the paper 120 is rubbed with the electronic pencil 130 to transfer the 2D digital image of the paint plate 110 onto the paper 120 as it is. It features. That is, the greatest feature is that the source image on the source media and the target image on the target media overlap in spatially identical positions, such as copying a coin or copying a coin, which enables human-machine interaction different from the above-described conventional invention. Let's do it. For example, if you put a piece of paper on a picture on a tablet PC monitor and rub it with a pen, the picture on the monitor can be transferred directly onto the paper.

However, when copying a source image to a target media with a simple rub with a pen, such as copying a coin, people work very quickly. Therefore, if the position of the electronic pencil is not known quickly and accurately, a large discrepancy occurs between the digital graphic image on the paint board and the target image transferred to the paper, and thus the implementation of the digital tablebook is impossible.

According to the experiment, the movement speed of the pen increases according to the amplitude of the rub. The movement speed is about 10cm / sec when the amplitude is 2cm and about 50cm / sec when it is 15cm. In response to this fast rubbing speed, it is necessary to accurately transfer the source image to the target media. To do this, you need to track the location of the pen fairly quickly and accurately.

Among the currently available handheld printers or electronic pencil position tracking methods, tablets provide high-speed absolute coordinate information. In this case, the electronic pen is used during the sampling cycle because the sampling frequency of two-dimensional coordinates is about 100 to 200 Hz. Will move about 2.5-5mm. Also, given the mechanical delays that can occur in the actuator module or the marking mechanism module to execute the output signal, it is not straightforward to accurately print a graphic image on a piece of paper with a pencil like a table.

Apart from the rubbing speed of the pencil, it is necessary to coincide with the positional origin of the pencil and the axis of the marking mechanism. If the two locations are inconsistent, the digital copy is impossible in the strict sense because the position of the transferred image varies depending on how the electronic pencil is held. Therefore, it is necessary to match the position origin of the electronic pencil with the axis of the marking mechanism or to determine the exact position of the marking mechanism.

The present invention solves these problems with the above-mentioned large-dracking algorithm.

FIG. 5 shows an embodiment according to the block diagram of FIG. 3, in which the entire system of paint 110 is included in housing 119 so that paint 110 is shaped like a traditional drawing board / drafting board. . According to this, as shown in FIG. 6, the paint plate 110 is embedded in a table, desk, door, wall, etc., and the user carries only the electronic pencil 130 and puts the paper on the embedded paint plate as needed. You can transcribe any graphical information you have.

When the paint board 110 is embedded in a traditional paint board or everyday furniture or wall, we leave the graphic image information around as needed, and the receiver of the information puts a paper on the object and rubs it with an electronic pencil to check it. Increasingly generalized computing environments are commonplace, and digital desktop systems can be widely used to send and receive graphic images among people through everyday objects and to print them on paper.

As the actuator 134, a solenoid may be used, and the marking means 133 may be used by modifying an automatic mechanical pencil. Although the control signal receiving means 135 of the electronic pencil and the control signal transmitting means 115 of the paint plate 110 are shown to be connected by wire, they may be wirelessly connected.

FIG. 7 illustrates another embodiment according to the block diagram of FIG. 3 and illustrates a case in which the tablet monitor 150 is directly used as a paint board. In this case, as shown in FIG. 8, the image on the screen of the monitor 150 may be transferred onto the paper by simply placing the paper on the image appearing on the tablet monitor 150 and rubbing it with the electronic pencil 130.

As such, digital desktop systems that use pen-based computing devices as paint, such as tablet monitors and tablet computers, will enable new human-computer interaction. You can work on the monitor with an electronic pencil and print the result directly on the paper. In this case, a desired portion of the source image displayed on the screen may be directly printed to a desired place and orientation of the target media to be printed.

Meanwhile, as shown in FIG. 9, the source image may be set using the picture card 160 having the RFID tag attached thereto, and FIG. 10 is an operation flowchart in this case. In this case, the RFID card 161 is included in the picture card 160 on which the graphic image is printed. The picture card 160 is placed on the paint plate 110 and the transfer paper 120 is placed thereon. Then, the ID recognition means 162 in the paint plate 110 recognizes the ID of the picture card 160 and transmits it to the information processing means 113 (S80). The information processing means 113 loads and loads the image corresponding to the ID recognized by the ID recognizing means 162 from the image storing means 114 and uses it to calculate the print output signal (S90). After all, using an electronic pencil to transfer a picture already printed on paper to a new paper.

In this case, it can be widely used as a play tool for children. Children in early childhood enjoy drawing in the form of warming through random hand gestures, and children learn to draw by following pictures in books. If drawing provides a digital tabletop system with picture cards to children who are not good at drawing, it is easy to draw a nice picture with their own touch with a simple rub, which will increase their interest in drawing.

11 is a diagram showing an example of a digital desktop created using the present invention. FIG. 11B is a copy of a fish image (a) stored in a paint plate using an electronic pencil. FIG. 11D is a drawing of a sunflower on a two-dimensional circle pattern (c). The drawing technique as shown in FIG. 11D is called a prottage, and the digital table device can be used to freely change a pattern.

As described above, according to the present invention, when a paper is placed on a physical concave-convex pattern and rubbed with ink or a pencil like a rubbing technique or rubbing technique, the pattern is transferred to paper, and thus, two-dimensional embedded in a paint plate using an electronic pencil. The digital graphic image can be directly output on the paper to be printed so that the absolute coordinates on the XY plane coincide.

Claims (6)

A digital tabletop device for placing a paper on a paint plate on which a two-dimensional digital image is stored and rubbing the paper with an electronic pencil to transfer the two-dimensional digital image to the paper so that the absolute coordinates on the XY plane coincide. The electronic pencil, A position transmitting means, a control signal receiving means, an actuator driven according to the control signal when a control signal is input to the control receiving means, and marking means for printing an image on the paper by driving the actuator, The paint, Electronic pencil position recognition means for receiving the signal from the position transmitting means of the electronic pencil to determine the position of the electronic pencil, image storage means for storing the two-dimensional digital image, and the electronic pencil position recognition means Information processing means for calculating a print output coordinate in consideration of the total system delay from the current position coordinate of the electronic pencil and calculating a print output signal by referring to the pixel of the print output coordinate in the two-dimensional digital image in the image storage means; And a control signal transmitting means for transmitting a control signal to the control signal receiving means of the electronic pencil when there is a change in the print output signal of the information processing means. 2. The printing output coordinates (X, Y) by the information processing means, when the current position coordinates of the electronic pencil is (Xo, Yo),

Digital table device, characterized in that, Velocity_X and Velocity_Y is the velocity of the electronic pencil in the current position coordinates (Xo, Yo), Acceleration_X and Acceleration_Y is the current position coordinates (Xo, Yo) and print output coordinates ( The acceleration of the electronic pencil between X, Y) and Td is the overall system delay. The apparatus of claim 1, wherein the paint plate further comprises ID recognition means of an RFID tag, and the information processing means loads and loads an image corresponding to an ID of an RFID tag recognized through the ID recognition means from the image storage means. And calculate the print output signal. In the digital tabletop method of placing a paper on a paint plate on which a source image is stored and rubbing the paper with an electronic pencil to transfer the source image to the paper. A first step of recognizing an electronic pencil position on the paint board; A second step of calculating a print output coordinate in consideration of the total delay time in the current position coordinate of the electronic pencil; Calculating a print output signal by referring to the source image pixel corresponding to the print output coordinate; Transmitting a control signal to the electronic pencil if there is a change in the print output signal, and returning to the first step of recognizing a position of the electronic pencil in the paint plate if there is no change in the print output signal; A fifth step of driving an actuator installed in the electronic pencil with the control signal; And And a sixth step of transferring the source image onto the paper such that the absolute coordinates on the XY plane coincide with each other by the driving means of the actuator. 5. The printing output coordinates (X, Y) according to claim 4, wherein the printing output coordinates are (X, Y) and the current position coordinates of the electronic pencil are (Xo, Yo).

Digital table device, characterized in that, Velocity_X and Velocity_Y is the velocity of the electronic pencil in the current position coordinates (Xo, Yo), Acceleration_X and Acceleration_Y is the current position coordinates (Xo, Yo) and print output coordinates ( The acceleration of the electronic pencil between X, Y) and Td is the overall system delay. The method of claim 4, further comprising a step of placing a picture card with an RFID tag embedded between the paint plate and the paper before the paper is placed on the paint plate, before the first step of recognizing the position of the electronic pencil. Recognizing the ID of the RFID tag and loading the source image corresponding to the paint plate in the drawing, wherein the calculation of the print output signal in the third step with reference to the source image corresponding to the ID of the RFID tag Digital desktop method, characterized in that made.

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