JPS60182264A - Input device of blackboard drawing information - Google Patents

Abstract

PURPOSE:To attain ease of partial erasure by obtaining a moving speed of a manual scanner with a speed sensor, starting the input of read information when the speed reaches the 1st speed and stopping the input when speed reaches the 2nd speed or below so as to input accurately a character or a graph. CONSTITUTION:A grip section 23 moving the line head sensor 21 with a prescribed read width on the blackboard and a manual scanner 13 provided with a distance/speed sensor 22 to detect the moving speed of the sensor 21 are provided. When a microprocessing unit 34 receives an output of the sensor 22 and it is detected that the moving speed of the scanner 13 reaches an input start speed (a) to be set, a set clock pulse is generated at each prescribed distance according to a pulse from the sensor 22 and the read data is stored in an internal processing memory 35. When the moving speed of the scanner 13 is decreased remarkably and reaches a prescribed input end speed (b), the device 34 confirms the end of input operation and transfers the storage data of the memory 35 to a main control section 40.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a blackboard drawing information input device for inputting images of characters, figures, etc. drawn on a blackboard.

[Technical Background of the Invention and its Problems] Conventionally, a so-called coordinate input method is configured using a digitizer in an input device that has an input function of reading information such as characters and figures drawn on a blackboard and inputting the image thereof. There is an electronic blackboard. This conventional electronic blackboard will be explained with reference to FIG. In FIG. 1, 1 is a casing of an electronic whiteboard, and 2 is a blackboard body attached to this casing 1. The blackboard main body 2 consists of a writing board (for example, a blackboard or a whiteboard) on which characters, figures, etc. are actually drawn, and a so-called digitizer board provided on the back side of the board. 3 is the so-called pen tip for actually drawing characters, figures, etc. on this blackboard body 2, and the coordinate values (X,
This is a board marker that includes a coordinate input section for inputting Y).

This board marker 3 replaces the stylus pen of a digitizer, and is provided with an input detection switch operated by the pressing force of the pen tip, an excitation coil for inputting coordinates, and the like.

4 is a so-called blackboard eraser, which is a wipe made of a hydrophilic material such as cloth, felt, or sponge and having a predetermined surface shape for erasing characters, figures, etc. actually drawn on the blackboard body 2; and a coordinate input section substantially similar to the above-described board marker 3 for inputting coordinate data of the operated position, that is, the position to be erased.

To explain the input operation and operation of the electronic blackboard shown in FIG.
, and write arbitrary characters, figures, etc. on the board of the blackboard main body 2 by pressing it against the surface of the board.

At this time, by pressing the pen tip of the board marker 3 against the blackboard main body 2, the input detection switch in the board marker 3 is turned on. This switch-on signal is input to a higher-level device (not shown) via a cable (hereinafter referred to as the control section), and under the control of the control section, the board marker 3
Current flows through the coil inside, causing a change in magnetic flux. As a result, the position information of the pen tip of the board marker 3 applied by the digitizer of the blackboard main body 2, that is, the X and Y position of the handwritten position.
A detection signal indicating the coordinates is sent to the control section, and image data according to each coordinate value corresponding to the locus of the line written on the blackboard body 2 is generated and written to a bitmap memory (not shown).

Also, when you want to erase any part of the characters, figures, etc. drawn on the board of the blackboard main body 2, press the eraser 4 against the position on the board that you want to erase, and use the wipe provided at the tip of the eraser. The removing portion erases the drawn portions of characters, figures, etc. to be erased on the board. At this time, by pressing the wiping part provided at the tip of the eraser 4 against the blackboard main body 2, the input detection switch provided inside the eraser is turned on, and this switch-on signal is sent to the control section. , the coordinates are detected in the same way as when operating the board marker 3, and the image of the part of the blackboard image stored in the bitmap memory that corresponds to the area wiped by the wiping section of the eraser 4 is detected. All will be deleted.

However, the conventional electronic whiteboard described above had the following drawbacks.

In other words, since conventional electronic blackboards use the coordinate input method as shown above, the pattern drawn on the blackboard body with a board marker and the image whose coordinates have been input (registered in the bitmap memory) do not necessarily match, especially,
Differences occur in line width and subtle line changes. That is, in other words, it is not possible to faithfully input images of characters, figures, etc. actually drawn with a felt-tip pen or the like on a blackboard in their original linear state. Further, the electronic blackboard is usually at least 1200M long and 15M wide.
Since a large digitizer board of about 00 m is required, there is an economic disadvantage in that the product price becomes very expensive.

In addition, the eraser has an area approximately proportional to the area of the wiping part for each input coordinate at the time of operation input, and correlates it with the area actually erased on the blackboard.
Errors are likely to occur in the erased range, and it is difficult to partially erase details such as intricate areas.

As described above, conventional electronic whiteboards have been disadvantageous in various aspects, such as input accuracy (fidelity), product price, and operability.

[Purpose of the Invention] The present invention has been made in view of the above-mentioned circumstances, and provides information such as characters and figures drawn on a blackboard that can be input faithfully and easily while maintaining the drawn shape, and that arbitrary portions can be easily erased. It is an object of the present invention to provide a blackboard drawing information input device that can be used in various ways and can be configured at low cost.

[Summary of the Invention] The present invention is capable of scanning characters, figures, etc. drawn on a blackboard by moving a manual scanner using an image sensor having a predetermined reading width, such as a line rad sensor, in a fixed direction on a blackboard. 6- Therefore, a mechanism is provided to detect the moving speed of the manual scanner, and the start and end of input is automatically controlled based on the detected moving speed.6- Therefore, As a result, product costs can be significantly reduced compared to electronic blackboards that use coordinate input methods, and characters and figures drawn on the blackboard can be input accurately and easily according to the drawn line shape. It is also possible to perform partial erasing extremely easily.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a perspective view schematically showing the configuration of essential parts in one embodiment. In the figure, 11 and 12 are components of a commonly used blackboard, 11 is a casing (frame) of the blackboard, and 12 is a board attached to this casing 11, such as a black board or a green board. , or a blackboard body (hereinafter simply referred to as a board) consisting of a whiteboard or the like. Reference numeral 13 denotes a manual scanner which is a component of the present invention, and is operated to move in a certain direction (for example, from left to right) on the board 12 when inputting characters, figures, etc. drawn on the board 12. Ru. This manual scanner 13 is connected to a scanner control unit (SON-CTL), which will be described later, via a signal cable 14.

FIG. 3 is a block diagram showing one embodiment of the present invention. In the figure, 21 to 25 are components of the manual scanner 13, 21 is a line rad sensor used as an image sensor, 22 is a distance/speed sensor for detecting the moving distance and moving speed, and 23 is a linear sensor used as an image sensor. Gripping part, 2
Reference numeral 4 denotes a support portion that supports the line rad sensor 21 and the distance/speed sensor 22.

The line rad sensor 21 is constructed by arranging a large number of optical reading elements in parallel on a substrate 26 with a pitch corresponding to a predetermined resolution.
It is fixed at 4. Further, the distance/speed sensor 22 is constructed using a photo sensor and a transparent rotary plate on which detection marks are radially carved.

30 is a scanner control unit (SCN-CTL) r connected to the manual scanner 13 via a signal cable 14, and inputs the data read by the rad sensor 21 to the line according to the signals from the distance/speed sensor 22 and the operation switch 25. Control. 40 is a main control unit (M) that receives data from the scanner control unit 30, generates image data for one side of the blackboard based on the data, and performs input/output processing, editing processing, etc.
-CTL).

A bitmap memory (BMM) 50 stores blackboard image data under the control of the main controller 40. 60
is an image printer control unit (PT-CTL) for printing out the blackboard image stored in the bitmap memory 50 under the control of the main control unit 40; 70
is a CRT display (CRT display) used for monitor display, editing, etc. of images stored in the bitmap memory 50.
RT), 80 is a keyboard (KB) used for inputting various instructions, editing processing, etc., 81 is a mouse also used for editing processing, 90 is a floppy disk used for storing image data of multiple blackboards, etc. device (FDD).

FIG. 4 is a block diagram showing in more detail the configurations of the manual scanner 13 and scanner control section 30 shown in FIG. 3 above. In the figure, 26 is a substrate of the line rad sensor 21 fixed to the support part 24. Each of 27 to 29 is a component of the distance/speed sensor 22, and 27 is a transparent rotating disk whose peripheral edge is in contact with the board 12 when the manual scanner 13 is moved.
8 is a detection mark provided on this rotating disk 27, and 29 is a photosensor that detects this detection mark 28.

31 to 35 are components of the scanner control unit 30, and 31 is an amplifier (LC) that converts the output signal of the line rad sensor 21 into a TTL level signal;
2 is a register (RA) that latches the sensor output, that is, image data obtained from this amplifier 31 in synchronization with the set clock pulse (S11); 34 is a scanner control unit 3;
Microprocessor (μ-CPU), which forms the core of 0, 3
Reference numeral 5 denotes a memory for internal processing, which has a control program storage area for the microprocessor 34, an input data storage area, etc.
CM).

FIG. 5 is a diagram showing the relationship between the speed of the manual scanner 13 and the timing at which the microprocessor 34 reads data from the register 32 in order to explain the input start and end control operations in the above embodiment. In the figure, A is the scanning speed of the manual scanner 13, a is the input 10-start set speed, b is the input end set speed, and RDT is the read timing of the microprocessor 34.

6 and 7 respectively show the microprocessor 3
6 is a flowchart showing the processing flow of step 4, FIG. 6 shows the speed detection flow of the manual scanner 13, and FIG. 7 shows the data input processing flow.

Here, the operation of one embodiment will be explained with reference to FIGS. 2 to 7. When inputting images such as characters and figures drawn on the board 12, the operator first uses the manual scanner 13.
After holding the grip part 23 of the manual scanner 13 and moving it to the input start position (for example, the upper left corner) on the board 12, move the manual scanner 13 in a certain direction (for example, from the left end to the right end) on the board 12. horizontally), Rad sensor 2 to the line
It is moved parallel to the side of the board 12 with a reading width of 1. That is, the board 12 is manually scanned in a strip-like line with the reading width of the rad sensor 21.

As described above, the manual scanner 13 horizontally moves along the board 12 in a strip shape with the reading width of the rad sensor 21, so that the rotating disk 2 of the distance/speed sensor 22
7 rotates at a rotational speed corresponding to its movement (manual scanning) speed. Due to the rotation of this rotating disk 27, the distance
The speed sensor 22 generates a detection pulse every time the detection mark 28 interrupts the optical path of the photosensor 29, and this pulse is input to the microprocessor 34 as an interrupt pulse. At this time, the read signal read by the rad sensor 21 to the line of the manual scanner 13 is sent to the scanner control unit 30 via the signal cable 14, and converted into a TTL level signal (hereinafter referred to as read data) by the amplifier 31. .

When the microprocessor 34 receives an interrupt pulse from the distance/speed sensor 22, it calculates the moving speed of the manual scanner 13 from each pulse interval, and stores the calculated speed data in a control table in the memory 35 for internal processing. do. This processing flow is shown in FIG. Furthermore, the microprocessor 34 reads the speed data stored in the control table and monitors whether the movement speed of the manual scanner 13 has reached a preset input start speed a, and adjusts the movement speed of the manual scanner 13. When it is detected that the input start speed a has reached the set input start speed a, the distance/speed sensor 2
2 (i.e., the faster the moving speed of the manual scanner 13, the shorter the time interval), a set clock pulse (sp) is generated, each time the amplifier 3
The read data level-converted in step 1 is latched into the register 32, taken in, and stored in the input data storage area of the internal processing memory 35. The input processing flow at this time is shown in the seventh section.
The relationship between the moving speed of the manual scanner 13 and the data input timing is shown in FIG. 5, which is shown in the left half of the figure.

In this way, the moving speed of the manual scanner 13 is calculated, and a set clock pulse (sp) is generated every fixed distance.
By latching and capturing the read data according to this pulse, that is, by inputting the data at every fixed distance, even if the speed of movement of the manual scanner 13 is uneven, it is possible to achieve high accuracy without distortion. Image data can be input. .

Then, the manual scanner 13 is 13 points from the left end on the board 12.
- When the manual scanner 13 is continuously moved by a predetermined amount to the right end, and the movement speed of the manual scanner 13 is nearing the end of one continuous movement operation, and reaches the preset input end speed, the micro The processor 34 recognizes the end of the -times movement operation, that is, the input operation, and transfers the data stored in the input data storage area of the internal processing memory 35 to the main control unit 40 . The processing flow at this time is shown in the right half of FIG. Then, the manual scanner 13 is continuously moved from the left end to the right end on the board 12, and when one continuous movement operation is completed, the rotating disk 27 stops rotating, and the distance/speed sensor 22 stops generating pulses.

When the main control section 40 receives the data transferred from the scanner control section 30, it develops and stores this data in the form of an image in the bitmap memory 50, and displays the stored image on the CRT display 70.

The operator scans the board 12 using the manual scanner 13.
Manually scan the line once in the horizontal direction in the band 14-shape with the reading width of the rad sensor 21, then set the manual scanner 13 again on the left end of the board 12, and move the manual scanner 13 over the next reading position in the same manner as above. move.

In this way, images of characters, figures, etc. drawn on the board 12 are sequentially input.

The bitmap memory 50 is input by the input operation described above.
The image on the board 12 expanded above shows the keyboard 80,
The image is edited into a desired image format by operating the mouse 81 or the like. That is, alignment (position correction) and partial correction for vertical and horizontal deviations for each movement operation are performed.

The image developed on the map memory 50 is transferred to the 70-tube disk device 90 under the control of the main control unit 40 in response to instructions from the keyboard 80 or external instructions, and a portion of one blackboard is The information is stored page by page, and further transferred to the image printer control unit and printed out.

Also, if you want to erase part or all of the characters, figures, etc. drawn on the board 12, before the above input operation, erase that part with a regular blackboard eraser, a piece of cloth, your finger, etc. Therefore, it is extremely easy to make small corrections.

As mentioned above, by moving the manual scanner 13 on the board 12 and inputting characters, figures, etc. drawn on the board 12, it is much cheaper than an electronic blackboard that uses coordinate input. It is easy to configure, easy to operate, and allows characters, figures, etc. drawn on the board 12 to be input accurately in the form they are drawn without distortion.

In the above-described embodiment, the manual scanner 13 includes:
The line rad sensor 21 is used in which a large number of photodetecting elements are arranged side by side in a row.For example, the detection elements are arranged in multiple rows (matrix arrangement) and configured to enable plane reading. It may be configured to read with '.

Further, in the above-described embodiment, the manual scanner 13 and the scanner control section 30 are configured separately, and the signal cable 14 connects them. It is also possible to incorporate it into 13.

Further, in the above embodiment, the timer counts the pulse interval from the distance/speed sensor 22, calculates the moving speed of the manual scanner 13, and inputs data at every fixed distance. The configuration may be such that the pulses generated by the sensor 22 are waveform-shaped and the data is directly latched and input using the pulses, or the data is read in accordance with pulses of a constant cycle.

Further, the external configuration of the entire manual scanner or the configuration of the distance/speed sensor 22, etc., which is a part of the scanner, is not limited to the above embodiment, and can be modified without departing from the gist of the present invention.

[Effects of the Invention] As detailed above, according to the blackboard drawing information input device of the present invention, a manual scanner using an image sensor having a predetermined reading width is moved in a fixed direction on the blackboard, It is configured to sequentially read characters, figures, etc. drawn on the scanner, and is equipped with a mechanism that detects the movement speed of the manual scanner, and automatically starts and ends input based on the detected movement speed. By adopting a configuration that performs control, product costs can be significantly reduced compared to electronic blackboards that use coordinate input methods, and characters and figures drawn on the blackboard can be accurately and easily drawn according to the drawn line shape. In addition to being able to input data, it is also possible to erase parts of details very easily.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an electronic blackboard using conventional coordinate input;
FIG. 2 is a perspective view showing an embodiment of the present invention, FIG. 3 is a block diagram showing the configuration of the above embodiment, and FIG. 4 shows a more detailed structure of the manual scanner and scanner control section in the above embodiment. A detailed block diagram, FIG. 5 is a diagram showing the relationship between the moving speed of the manual scanner and data input timing in the above embodiment, and FIGS. 6 and 7 are data input processing within the scanner control unit, respectively. It is a figure showing a flow. 11... Chassis of blackboard (frame body), 12... Board (main body of blackboard), 13... Manual scanner, 14... Signal cable, 2118-... 3-in Rad sensor, 22...・Distance/speed sensor, 23...Gripping part, 24...Supporting part, 25...
Operation switch, 26... board, 27... rotating disk,
28... Detection mark, 29... Photo sensor, 30
...Scanner control unit, 31...Amplifier, 32...
Register, 34...Microprocessor, 35...
Internal processing memory, 40... Main control unit, 50... Bit map memory, 60... Image printer control unit, 70... CRT display, 80... Keyboard, 81... Mouse, 90 ... Floppy disk device, (St)) ... Set clock pulse. Applicant's agent Patent attorney Takehiko Suzue 19-

Claims (2)

[Claims] (1) A manual device equipped with an image sensor having a predetermined reading width, a grip section for moving the image sensor over the blackboard with the reading width, and a speed detector for detecting the moving speed of the image sensor. The moving speed of the manual scanner is calculated based on the detection signals of the scanner and the speed detector, and when the calculated moving speed exceeds a preset first speed, information read by the image sensor is obtained. blackboard drawing information, comprising an input control means that starts inputting and ends inputting of the read information when the calculated moving speed becomes equal to or less than a preset second speed. Input device. (2) The first aspect of the present invention further comprises inputting and controlling the read information of the image sensor based on the detection signal of the speed detector.
The blackboard drawing information input device described in Section 1.