JPH0836461A - Method for deciding and processing various kinds of tip of pen and handwriting information input device with monitor - Google Patents

Abstract

(57) [Abstract] [Purpose] When inputting handwriting information of characters and figures to a computer, it is possible to reliably detect down and up movements of any writing instrument on the paper, and various handwriting movement judgment processing methods and handwriting with a monitor. An information input device is provided. [Structure] A writing tool holder 6 for holding a favorite writing tool α in a detachable manner is provided at a lower end portion, and a handwriting recognition circuit 11 for transmitting a handwriting information signal obtained by restoring recognition of a handwriting acceleration trajectory to a computer is built in. A CCD monitor for photographing and monitoring the peripheral region of the writing tip α1 of the writing instrument α held in the writing instrument holding unit 6 on the forward lump-shaped step 1a at the upper end of the apparatus housing 1 and inputting the writing point monitoring image signal to the handwriting recognition circuit 11. The camera 18 is embedded integrally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing point motion determination processing method provided for writing when inputting handwriting information such as characters and figures by a writing instrument to a computer, and a character input with a monitor used directly for its execution. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, there are a keyboard, a mouse, a tablet, etc. for inputting characters and figures into a computer. However, as an input device with better portability, a signal output of an acceleration sensor integrated in a pen is used as the input device. A number of devices have been proposed for inputting the trajectory of a character or figure written by a user into a computer, for example, by performing a multiple integration process (Japanese Patent Laid-Open No. Hei 3).
No. 156519, Japanese Patent Application Laid-Open No. 4-195321, Japanese Patent Application Laid-Open No. 4-256009, Japanese Patent Application Laid-Open No. 4-2821717).

[0003]

The problem of such a pen with a built-in acceleration sensor is usually due to various preferences of fountain pens, mechanical pens, magic pens, water-based pens, paintbrushes, brushes, ballpoint pens, pencils, etc. There is a problem that the pen is fixed to a fixed fixed pen, while the pen is used as a writing instrument of various types and various writing tastes.

Further, with a pen with a built-in acceleration sensor, a technique of processing an acceleration signal and inputting the trajectory of the pen into a computer while writing with ink on a paper with a ball-point pen attached to the tip (JP-A-4-282717) is also proposed. However, in any case, a dedicated pen was required, and it was impossible to replace the pen.

Further, in order to make it easier to understand the axial direction of the sensor when gripping the pen, there is a technique of making the cross section of the pen into an inverted triangle (Japanese Patent Laid-Open No. 62-140130). Differently, there was a problem that it was difficult to hold. In order to solve these problems, an input device with a built-in accelerometer in a device housing that is connected to the pen with a spring or screw allows any pen to be used, and when the pen is gripped, the axis direction of the accelerometer is natural and There are prior inventions that are forcibly decided.

However, in the means for incorporating the acceleration sensor in the pen itself, by incorporating a pressure sensor in the pen shaft, it is possible to detect the up and down motions of the pen on paper or a desk surface. (JP-A-3-156565), in an input device having a built-in acceleration sensor in a device housing coupled to a pen with a spring or a screw, the pen itself cannot be manipulated. It was necessary to incorporate an acceleration sensor in the axis to detect the up and down movements of the pen.

However, this method has a problem that it is difficult to detect the down movement of the pen unless the pen is brought into contact with paper or the like without sufficient displacement or impact in the Z-axis direction (see the coordinate axes in FIG. 2). there were. Further, since the impact in the Z-axis direction is smaller when the pen moves up from the paper or the like, it is more difficult to detect the up motion from the pen or the paper.

The main objects to be solved by the present invention are as follows. A first object of the present invention is to provide a character or graphic input device to a computer with an acceleration sensor built-in, by selecting any existing conventional handwriting writing means such as a pen or pencil, and writing a handwriting on paper. While leaving the above, an object of the present invention is to provide a handwriting information input device with a monitor and a method for determining various motions of a writing brush, which enables simultaneous input of characters and figures to a computer.

A second object of the present invention is to make it easy to grip the pen by making the cross-sectional shape of the pen into an inverted triangle or the like.
When you hold any existing writing instrument, you can input characters and figures to the computer at the same time by the device with built-in acceleration sensor, and it is possible to reliably detect up and down movements of any writing instrument on paper. A method and a handwriting information input device with a monitor are provided.

A third object of the present invention is to provide a brush tip peripheral area,
According to a series of calculation procedure and determination procedure from the monitoring image obtained by continuously monitoring the shooting monitor means attached to the writing instrument,
An object of the present invention is to provide a method for determining various motions of a writing tip that continuously judges motions of various writing tools during single-character writing and a handwriting information input device with a monitor.

Other objects of the present invention will become apparent from the description, drawings, and particularly the claims.

[0012]

The solution to the above-mentioned problems can be achieved by adopting the novel characteristic construction method and means listed in the following by the present invention. That is, the first feature of the method of the present invention is that the surroundings of the writing tip are constantly monitored while being integrally attached to the writing instrument, and the presence / absence of movement of the writing tip over time is determined from the writing tip monitoring information in a series of calculation procedures and subsequent determination. This is a method for determining various movements of the writing tip, which makes a judgment according to a procedure and judges each movement during writing of one character such as writing start, raising / lowering, stroke writing, transition to the next stroke and end of writing with a writing instrument.

A second feature of the method of the present invention is a method for determining various motions of the writing tip, wherein the writing tip monitoring information in the first feature of the method of the present invention is image information.

The third feature of the method of the present invention is that the calculation procedure in the first, second or third feature of the method of the present invention involves step I of capturing a monitoring image at time t and monitoring after Δt seconds. Step II for capturing an image, and Step II
And a step III of calculating a displacement difference for Δt seconds between the step I and the step I.

A fourth feature of the method of the present invention is that the determination procedure in the first, second or third feature of the method of the present invention determines whether or not there is a displacement difference as a result of the calculation procedure.
V, and if there is, step V that returns to step I after determining that it is in the middle of writing, and if not, whether or not the center circle in the central area of the monitoring image at time t becomes blank except for the brush tip. In the case of the judgment step VI, in the case where the time t is the stroke start point, the step VII is judged, the step VII is followed by the step VIII of returning to the step I after Δt seconds, and the step V
If it is not blank in the determination of I, step IX for determining time t as the stroke end point, and step IX
Continuing with step X, it is determined whether there is a write operation for a certain time I or more, and if there is, step XI that elapses the time Δt in seconds, and after the step XI has elapsed, it is determined that there is a transition to the next stroke. Then, the writing tip motion determination processing method includes sequentially passing through step XII for returning to step I and step XIII for determining the end of writing one character if there is no step XII.

The first feature of the device of the present invention is to provide a writing tool holding portion for holding a writing tool of your choice in a detachable manner, and send a handwriting information signal obtained by restoring recognition of a writing acceleration trajectory to a computer separately. At the other end of the device housing containing the handwriting recognition circuit, a photographing monitor means for integrally photographing the peripheral area of the writing tip of the writing instrument held in the writing instrument holder and inputting a writing tip monitoring image signal to the writing instrument recognition circuit is integrally provided. It is a handwriting information input device with a monitor.

A second feature of the device of the present invention is that the photographing monitor means in the first feature of the device of the present invention is integrally embedded with a CCD monitor camera or a pick-up tube monitor with its tip exposed at the upper end of the device housing. It is a handwriting information input device with a monitor.

A third feature of the device of the present invention is that the writing tool holding portion in the first or second feature of the device of the present invention is formed in an L step portion so that the lower end of the holding side of the device housing can be pressed by the thumb. In addition, the lower end of the sandwiching plate whose upper end is rotatably pivotally attached to the housing of the apparatus is bent by the index finger of the sandwiching plate so that the lower end of the L step portion is always in pressure contact with the sandwiching plate to elastically bias the sandwiching plate. It is a handwriting information input device with a monitor formed so that it can be held freely.

A fourth feature of the device of the present invention is that the writing implement holder in the first or second feature of the present invention cuts out the writing implement holding groove over the entire length of the lower end on the holding side of the device casing. In addition, the handwriting information input device with a monitor is configured such that a tip of the writing tool fixing screw is threaded through the writing tool holding concave groove so that the tip can freely protrude from the lower end portion sideways.

A fifth feature of the device of the present invention is that the handwriting recognition circuit according to the first, second, third or fourth feature of the device of the present invention is oriented in the X-axis and Y-axis directions of the two-dimensional plane coordinates. Did X
Axis and Y-axis acceleration sensors, an amplification unit for input-amplifying the acceleration signals of these acceleration sensors, and a signal double for restoring the trajectory of the handwriting by performing square integral calculation processing on the acceleration trajectory by the amplified acceleration signal from the amplification unit. An integrating section, a character recognizing section for recognizing the handwriting trajectory signal from the signal double integrating section with an algorithm by a character, a signal transmitting section for converting the recognized character into a character code and separately transmitting the character to a computer, and monitoring of a photographing monitor means. A central processing unit for inputting an image signal, centralizing and controlling the entire circuit system of the amplification unit, the signal double integration unit, the character recognition unit, and the signal transmission unit, and a driving current for the entire circuit system. A handwriting information input device with a monitor, which is configured by a power supply unit and a circuit system configuration.

A sixth feature of the device of the present invention is a handwriting information input device with a monitor, wherein the power source section in the fifth feature of the device of the present invention is constituted by a circuit of a solar cell mounted on the outer surface of the device housing. is there.

[0022]

The present invention takes the above-mentioned novel method and means, that is, a built-in acceleration sensor, processes an acceleration signal output from the acceleration sensor, and inputs characters and figures to a computer. In the information input device, elastically or screwed to a writing instrument selected by the user, forcibly determine the user's gripping direction from the shape of the device housing and align it with the axial direction of the built-in acceleration sensor. A CCD monitor camera or the like of a suitable example is built in as a photographing monitor means for photographing the surroundings, and a monitoring image of a writing tip captured by the CCD monitor camera or the like is subjected to image processing to perform various operations including down and up of writing instruments on paper. recognize.

The user can select any existing writing instrument and input the handwriting information of characters and figures to the computer while leaving the handwriting on the paper, and the axial direction of the built-in acceleration sensor is naturally determined when grasped. Various operations such as down and up of an arbitrary writing instrument on paper can be reliably determined by processing a monitoring image captured by a CCD monitor camera or the like.

[0024]

【Example】

(Device Example 1) A first device example of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an example of the present device holding a pencil, FIG. 2 is a perspective view of the same holding device, and FIG. 3 is a partially cutaway enlarged side perspective view of the example of the present device.

In the figure, A is a handwriting information input device of this example,
Reference numeral 1 is a device housing, 1a is a forward tilted step, α is a pencil as a suitable example of a writing instrument, β is a hand, βa is a thumb, βb is an index finger, 2 is a sandwich plate, 3 is a support piece, and 4 is a connecting pivot. The support pin, 5 is a torsion coil spring, 6 is a writing tool holding portion, 7 is an L step portion, 8 is an inclined bent portion, and 9 and 10 are lower ends.

Reference numeral 11 is a handwriting recognition circuit, 12 and 13 are X-axis and Y-axis acceleration sensors of two-dimensional plane coordinates, 14 is an amplification section, 15 is a signal double integration section, 16 is a character recognition section, and 17 is a character recognition section.
Is a signal transmission unit, 18 is a CCD monitor camera as a preferable example of photographing monitor means, 19 is an input connection with the CCD monitor camera 18, and an amplification unit 14, a signal double integration unit 15, a character recognition unit 16, and a signal transmission unit 17 are provided. Reference numeral 20 denotes a central processing unit for controlling the centralized operation of the entire circuit system including a power supply unit for supplying a drive current to the entire circuit system.

The specifications of this apparatus example are such a concrete embodiment, and the use operation thereof will be described. Now
In this device example, a pencil α as an arbitrarily selected writing tool is placed on the writing tool holding portion 6 of the device housing 1 and the sandwich plate 2 at a position where the writing tip α1 is caught by the CCD monitor camera 18, like a clothespin. However, it is sandwiched and fixed by the torsion coil spring 5 (see FIG. 1). When the user grasps and uses this,
As shown in FIG. 2, the index finger βb and L applied to the inclined bent portion 8
The thumb βa applied to the step 7 sandwiches and holds the device housing 1, and the acceleration sensor 1 built in the device housing 1
The 2 and 13 axis directions are automatically determined.

When the user writes a character on a paper or the like in this device example,
The device housing 1 connected to an arbitrary pencil α moves together, and its carrying is detected by the X and Y axis acceleration signals Sx and Sy by the X and Y axis acceleration sensors 12 and 13, and the amplification processing is performed by the amplification unit 14.
After that, when the signal double integration unit 15 double-integrates, the trajectory of the handwriting is restored, and the character recognition unit 16 performs character recognition by an existing algorithm (for example, Japanese Patent Application No. 6-4204 online handwritten character recognition method). Is performed and the written characters are recognized. The recognized character is transmitted as a character code from the signal transmission unit 17 to the outside by radio or infrared rays, and an existing computer having a reception unit receives the signal. The central processing unit 19 performs the determination processing of various operations such as down and up of the pencil α on the paper and the timing processing required for the double integration processing of the signal double integration unit 15.

(Example of Method) The execution processing procedure of the example of the method of the present invention applied to this example of the apparatus will be described with reference to the drawings. FIG. 4 is a diagram for explaining a start point and an end point of one-stroke motion during one-character writing in this method example, FIG. 5 is a diagram for explaining a monitor image near the start point, and FIG. 6 is a diagram for explaining a monitor image near the end point. FIG. 7 is a flowchart of the same monitoring image processing. A method of determining the down and up movements of the pencil α to the paper or the like, and the method of determining the start and end points of the stroke will be described below with reference to FIGS. 4 to 7. It should be noted that the down movement of the pencil α is that the brush tip α1 comes into contact with the paper, the up movement of the pencil α is that the brush tip α1 is separated from the paper, and the stroke is the next operation after the pencil α moves down onto the paper. A description will be given assuming that the pencil α moves up.

In the following, description will be made assuming that a right-handed person draws a character or a figure by squeezing an example of the apparatus and an arbitrary pencil α. A series of image processing is performed by the central processing unit 19 while adjusting the timing with each unit. As shown in FIG. 4, when writing a character, there is a writing start point S and an end point E in one stroke ST. CCD monitor camera 18
As shown in the left diagram of FIG. 5, the periphery of the brush tip α1 is photographed. The circular dotted line near the center of the circular monitoring image MD will be called the center circle SC below.

Now, description will be made with reference to the flowchart of FIG. The CCD monitor camera 18 captures the image at time t as shown in the left diagram of FIG. 5 (see step I). Now, let a minute time be Δt (for example, t = 33 [msec]).
At time Δt from t, an image as shown on the right side of FIG. 5 is taken in (see step II). The displacement difference between the monitor images MD of the two persons is calculated (see step III), and it is determined whether or not there is a displacement difference (see step IV). If there is a difference, the pencil α is moving down on the paper and the stroke It is determined that writing is in progress (pen down operation is in progress) (see step V).

If there is no difference, the monitoring image MD is determined whether or not there is no stroke ST handwriting image in the center circle SC except the image of the writing tip α1 in the monitoring image MD at time t (see step VI). ), If blank, it is determined that the time t is the starting point S of the stroke ST (the moment of the pencil α down operation) (see step VII), and t = t +.
Let Δt (see step VIII) and return immediately after the start point of the loop. If it is not blank, it is determined that the time t is the end point E of the stroke ST (the moment of the up movement of the pencil α) (see step IX).

Further, for a certain period of time T or more (for example, T = 1 [s
ec]) It is determined whether there is no writing (see step X). If there is no writing, it is determined that one character has been written, and the loop ends (see step XIII). If there is a writing, t = t + Δt is set (see step XI), it is determined that the state is the transition state to the next stroke ST (see step XII), and the process returns immediately after the start point of the loop. Whether or not there is writing for a certain period of time T or more is performed in the same manner as whether or not there is a displacement difference between the two monitoring images MD at time t and t + Δt. This is the end of the description of the determination of the start point S and the end point E of the stroke ST and the determination of the pencil α up and down motions.

Characters and figures can be recognized in acceleration trajectories in the X and Y axis directions. (1) A method of recognizing a character written from a character trajectory by double integrating the acceleration trajectory described above. A method of recognizing a character written from a velocity trajectory by integrating the acceleration signal once (3) A method of recognizing a character written from the acceleration trajectory itself (4) A combination of two or more methods among the three methods It can be any of the methods for recognizing characters written in.

Further, without performing character recognition in the character recognition section 16, only the trajectory of the written character or figure may be output from the signal transmission section 17 to the outside by performing the double integration processing of acceleration. . Furthermore, the signal transmission from the signal transmission unit 17 may be wired in addition to wireless and infrared. In addition, the power supply unit 20 may include a normal dry battery, a lithium battery, a nickel-cadmium battery, an air battery, or the like, or may have a solar battery mounted on the outside of the device housing 1.

In addition, a display made of liquid crystal or the like may be attached to the outside of the device housing 1 so that written characters or recognized characters can be visually fed back to the user. Also, a signal receiving unit (not shown) connected to the handwriting recognition circuit 11 may be built in the device housing 1 to receive a signal transmitted from the outside like a pager and display it on the display.

The CCD monitor camera 18 for photographing the monitoring image MD around the brush tip α1 is not limited to the CCD system,
Other types such as an image pickup tube monitor may be used. Further, any writing instrument may be various pens such as fountain pens, ballpoint pens, brush pens, brushes, pencils, mechanical pencils, felt-tip pens, felt pens, etc. as so-called inked pens.

(Device Example 2) A second device example of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view of an example of this apparatus holding a pencil. B is a handwriting information input device with a monitor of this device example, 2
Reference numeral 1 is a device housing, 22 is a writing tool holding groove that extends through the entire length of the lower end side of the device housing 21, and 23 is a writing tool holding groove 2.
(2) A writing tool fixing screw for screwing inwardly from a recess 24 that is recessed laterally inward, and adjusting the rotation to insert and insert a pencil α inserted at the front end, 25 is a writing tool holding portion, and 26 is a device housing 21. This is a CCD monitor camera in which the front end is exposed and embedded in the forward tilting step portion 21a. In this device example, an arbitrary pencil α is sandwiched, but not the pinch force of the torsion coil spring 5 as in the first device example, but is connected to the pencil α by using the writing instrument fixing screw 23 and the recess 24 of the device housing 21. It is a thing. Since the same handwriting recognition circuit 11 as the first device example shown in FIG. 3 is built in the device housing 21, the procedure of the same method example applied to the first device example is executed.

[0039]

As described above, the present invention has the advantage that the user can use his / her favorite writing instrument because the device housing incorporating the acceleration sensor holds and connects any existing writing instrument. Also, since the user can forcibly determine the gripping direction from the shape of the device housing and match it with the axial direction of the built-in acceleration sensor, the user does not have to worry about the axis of the sensor and the axial direction of the acceleration sensor will naturally change. It has the advantage of being decided.

Further, since the CCD monitor camera built in the housing of the apparatus captures an image around the tip of the brush and processes the handwriting written on the paper as a monitor image, there is an advantage that the down and up movements of the writing instrument can be reliably determined. As a field of application, it can be generally used as a handwriting information input device for inputting characters and figures to a computer while leaving handwriting on paper, and is a portable PDA.
Input device, two-way pager input device, writing device for vouchers such as restaurants and courier that leave handwriting on paper and transfer characters to cash register, character recognition of contents of medical chart while writing with pen on medical chart of hospital Then, it can be applied to a device for inputting to a computer.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state where an existing pencil is held by a first device example of the present invention.

FIG. 2 is a perspective view showing a user gripping the same.

FIG. 3 is a partially cutaway enlarged side perspective view of a first device example of the present invention.

FIG. 4 is a diagram illustrating a start point and an end point of a one-stroke operation during writing a character in the method example of the present invention.

FIG. 5 is a diagram illustrating a monitoring image near the start point of the above.

FIG. 6 is a diagram illustrating a monitoring image near the end point of the above.

FIG. 7 is a flowchart of the monitoring image processing of the above.

FIG. 8 is an enlarged side perspective view of a second device example of the present invention.

[Explanation of symbols]

 A, B ... Handwriting information input device α ... Pencil α1 ... Writing tip β ... Hand βa ... Thumb βb ... Index finger 1, 21 ... Device housing 1a, 21a ... Forward tilted step 2 ... Clamping plate 3 ... Support piece 4 ... Connection Pivot pin 5 ... Torsion coil spring 6,25 ... Writing tool holding part 7 ... L step part 8 ... Inclined bending part 9, 10 ... Lower end 11 ... Handwriting recognition circuit 12, 13 ... X, Y axis acceleration sensor 14 ... Amplification part 15 ... signal double integration section 16 ... character recognition section 17 ... signal transmission section 18, 26 ... CCD monitor camera 19 ... central processing section 20 ... power supply section 22 ... writing instrument holding concave groove 23 ... writing instrument fixing screw 24 ... hollow

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Sonehara 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (10)

[Claims] 1. The writing brush is integrally attached to the writing implement to continuously monitor the vicinity of the writing tip, and the presence or absence of the movement of the writing tip over time is determined from the writing tip monitoring information in accordance with a series of calculation procedures and subsequent determination procedures. A method for determining various movements of a writing tip, wherein each movement during writing one character such as writing start, raising / lowering, stroke writing, transition to the next stroke and end of writing by a writing instrument is determined. 2. The method of processing for determining various movements of a writing tip according to claim 1, wherein the writing tip monitoring information is image information. 3. The calculation procedure comprises a step I of capturing a monitoring image at time t, a step II of capturing a monitoring image after Δt seconds, and a displacement difference of Δt seconds between step II and step I. 3. The method for determining a variety of motions of a brush tip according to claim 1, wherein step III and step are sequentially and consistently performed. 4. The determination procedure includes: a step IV for determining whether or not there is a displacement difference as a result of the operation procedure; a step V for determining if there is a write difference operation, and a step V for returning to the step I; Further, step VI for determining whether or not the center circle in the central region of the monitoring image at time t becomes blank if the brush tip is removed, and if so, step VII for determining time t as the stroke start point, and following step VII. After Δt seconds, step I
Returning to step VIII, and when it is not blank in the determination in step VI,
A step IX for judging the time t as the stroke end point, a step X for judging whether or not there is a write operation for a certain time I or more following the step IX, and a step XI for elapsing a time Δt in seconds if there is, After passing the step XI, step XII for determining the transition to the next stroke and returning to step I, and step XIII for determining the end of writing one character if there is no step X, sequentially 4. A method for processing for determining various movements of a brush tip according to claim 1, 2, or 3. 5. An apparatus having a handwriting recognition circuit for providing a writing tool holding portion for removably holding a favorite writing tool at one end and transmitting a handwriting information signal obtained by restoring recognition of a writing acceleration trajectory to a computer separately. A writing trace with a monitor, which is integrally provided at the other end of the housing with photographing monitor means for photographing and monitoring the peripheral region of the writing tip of the writing instrument set and held in the writing instrument holding section and inputting a writing tip monitoring image signal to the handwriting recognition circuit. Information input device. 6. The handwriting information input device with a monitor according to claim 5, wherein the photographing monitor means has a CCD monitor camera or an image pickup tube monitor which is integrally embedded and extended at the upper end of the device housing with its tip exposed. 7. The writing instrument holder has a lower end on the gripping side of the device housing formed in an L step portion so that the thumb can abut it, and an index finger of a sandwiching plate whose upper end is rotatably pivoted on the device housing abuts. The handwriting with a monitor according to claim 5 or 6, wherein a freely bendable lower end is elastically biased to the sandwich plate so as to be always in pressure contact with the lower end of the L stepped portion, so that the writing instrument can be held. Information input device. 8. The writing tool holding portion has a writing tool holding concave groove notched and extends over the entire length of the lower side of the holding side of the apparatus casing, and the writing tool holding portion is fixed so that the tip can freely project from the lower end sideways into the writing tool holding concave groove. The handwriting information input device with a monitor according to claim 5 or 6, wherein the handwriting information input device includes a screw. 9. A handwriting recognition circuit, an X-axis and Y-axis acceleration sensor oriented in the X-axis and Y-axis directions of two-dimensional plane coordinates, an amplification section for input-amplifying acceleration signals of these acceleration sensors, and the amplification section. 2 of the acceleration trajectory by the amplified acceleration signal from
A signal double integration unit that restores the trajectory of the handwriting by multiply-integrate calculation processing, a character recognition unit that recognizes the handwriting trajectory signal from the signal double integration unit using an algorithm, and a character code that encodes the recognized character. A signal transmission unit to be transmitted and output to a computer and a monitor image signal of the photographing monitor means are input, and the entire circuit system of the amplification unit, the signal double integration unit, the character recognition unit, and the signal transmission unit is collectively calculated. 6. A circuit system configuration comprising a central processing unit for controlling and a power supply unit for supplying drive current for the entire circuit system.
The handwriting information input device with a monitor according to 6, 7, or 8. 10. The handwriting information input device with a monitor according to claim 9, wherein the power supply unit is constituted by a solar cell mounted on the outer surface of the device housing.