JPH0792726B2 - Information processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention determines the coordinates of a trajectory drawn with a pen tip in contact with a tablet surface on which a plurality of character frames are set,
Regarding the information processing method that performs recognition processing of handwritten information, especially with respect to the character frame being input, just by moving the pen tip to the adjacent character frame, the end of the character being input is judged and new recognition is started The present invention relates to an information processing method that can be performed.

[Summary of Disclosure] The present invention corresponds to a character frame different from the character frame to which the locus drawn while the pen tip is in contact with the tablet surface is determined by determining the position of the pen tip located in an area above the tablet surface. By determining that the pen tip has moved to the inputtable area above the tablet surface, and recognizing the locus according to the determination of the movement of the pen tip above the tablet surface, for example, during inputting. Just by bringing the pen tip close to the adjacent character frame to the character frame, the end of the character being input is judged and recognition is started, so it is a natural operation for the operator, and even unconsciously You can indicate the end and you don't have to enter the next stroke, so
It also discloses an effective technique in the case of the final character input.

It should be noted that this outline is provided only for quick access to the technical contents of the present invention, and has no influence on the technical scope and the interpretation of rights of the present invention.

[Prior Art] As a character cutout method in the conventional information processing method of this type, a pen touch is performed on a function every time one character is input, a pen touch is detected for a certain period of time, or a constant character is input for a character being input. Detects that a pen touch is made at a distance above, stores the character frame, detects that a pen touch is made to another character frame for the character frame being input, and strokes are made to another character frame. Methods such as detecting input and touching a certain area outside the character frame with a pen have been proposed.

[Problems to be Solved by the Invention] However, in the method of the above-mentioned first term, the movement and motion of the line of sight of the operator become large, so that the work efficiency is reduced. Further, in the method of the second term, it is necessary to wait a certain period of time for cutting out one character, so the input speed is reduced. In the method of the third term, the character spacing must be increased in order to accurately cut out the characters, so that the tablet surface cannot be effectively used and the usability is deteriorated. Further, in the method of the fourth term and the method of the fifth term, since recognition is performed after the input of the next character is started, an operation such as correction of erroneous recognition is complicated, and the last character is other means. Had to cut out the letters by. In the method of the sixth item, a certain area outside the character frame has to be touched with a pen at the end of one character, so that the operation becomes unnatural and the work efficiency of the operator is reduced.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to determine the cut-out of a character and start the recognition without inputting the next stroke. Accordingly, it is to provide an information processing method for improving work efficiency.

[Means for Solving the Problems] In order to achieve the above object, the information processing method of the present invention determines the coordinates of a trajectory drawn with a pen tip in contact with a tablet surface on which a plurality of character frames are set. Then, the position of the pen tip positioned in the area above the tablet surface where a plurality of inputtable areas corresponding to each of the plurality of character frames is set is determined, and the pen tip is moved according to the determined position of the pen tip. It is determined that the pen tip has moved to an enterable area corresponding to a character frame different from the character frame to which the drawn trajectory belongs, and the pen tip touches the tablet surface according to the judgment of the movement of the pen tip. It is characterized in that recognition of the trajectory drawn in the state of starting is started.

[Operation] In the present invention, the position of the pen tip positioned in the area above the tablet surface is determined, and the tablet corresponding to a character frame different from the character frame to which the trajectory drawn with the pen tip in contact with the tablet surface belongs. It is determined that the pen tip has moved to the inputtable area above the surface, and recognition of the locus is started in response to the determination of the movement of the pen tip above the tablet surface.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the basic configuration of the embodiment of the present invention.

Here, a is a handwriting information input tablet having a plurality of character frames, b is an input pen for writing the tablet information by handwriting, and c is a first detecting means for detecting whether or not the pen b is in contact with the tablet a. , D is a second detecting means for detecting in which input section the pen b is located when it is detected that the detecting means c is in contact, and e is any of the pen b when detecting that the detecting means c is not in contact. Third detection means for detecting whether or not the input area is present, f is second and third detection means
Fourthly, detecting that the pen b has moved from within the character frame being input to the inputtable area on another character frame based on the outputs of d and e.
And g is an information recognition means for starting confirmation of one unit of information according to the output of the fourth detection means f.

FIG. 2 shows a circuit configuration example of the device of the present invention. Here, 1 is an input tablet (tablet board) in which a character frame of 8 mm to 13 mm square is displayed in a matrix, 2 is an input pen,
Reference numeral 3 is a character frame on the tablet 1 for inputting characters. As the tablet 1, an electromagnetic coupling method using an induced voltage generating pen or an electrostatic coupling method can be applied. Reference numeral 4 denotes a character cut-out detection circuit, which detects the up / down information of the pen 2 and the coordinates of the pen 2 as XY orthogonal coordinate axes, and sends them to a feature extraction circuit 5 for encoding the position information. send. At the same time, the character cutout detection circuit 4
Regardless of whether the pen 2 is up or down, which input section on the surface of the tablet 1 is touched by the pen 2 from the position coordinates of the pen 2 or which input section is in the inputtable area Is detected, it is detected that the pen 2 has moved to a character frame 3 other than the character frame 3 being input, or to the above-described input enable area,
In response to this detection, the recognition start signal RS is sent to the matching circuit 6. Further, when the character cutout detection circuit 3 detects that there is a pen touch of the pen 2 on a character frame other than the character frame 3 being input, the input character frame is changed and the matching circuit 6 receives the character input start signal IS. To send.

The above-mentioned feature extraction circuit 5 cuts out a stroke from the up / down information of the pen 2 and the position coordinates of the pen 2, extracts the feature CS of the stroke, and sends it to the matching circuit 6.

Further, in the above-mentioned matching circuit 6, the characteristic information CS sent from the characteristic extraction circuit 5 is accumulated in the temporary storage memory (internal memory) for one character, and when the recognition start signal RS is received from the character cutout detection circuit 4, it is temporarily stored. The feature CS for one character of the memory is matched with the character feature stored in the dictionary 7 in advance, and the recognition result obtained as a result is displayed on the display circuit 8.
To display on a display screen such as a CRT display.

When the matching circuit 6 receives the above-mentioned character input start signal IS from the character cutout detection circuit 4, the matching circuit 6 clears the contents of the temporary storage memory to prepare for the accumulation of the characteristics of the next character. The dictionary 7 stores the characteristics of the recognition contrast character in advance.

The input tablet 1 is a device that outputs coordinates of the input pen 2 on the tablet surface. In addition to the coordinates of the pen 2 when the input pen 2 directly touches the tablet surface, the input pen 2 touches the tablet surface. Even if not, if the pen tip of the pen 2 is above the tablet surface and is closer than the tablet surface by, for example, about 5 mm to 10 mm, which point of the tablet 1 surface is the pen 2 closest to? , And output the detected coordinates,
Any method may be used. For example, when an electromagnetic induction type digitizer manufactured by “Oscon Electronics Co., Ltd.” is used as the above-mentioned tablet 1, the effective reading height is
If it is 7 mm and the pen is on the surface of the tablet and the distance from that surface is 7 mm or less, then the coordinates of pen 2 are output.

Further, in the input tablet 1, by sufficiently shortening the sampling interval, the same coordinates as the stroke starting point are input in the pen-up state before the stroke starting point of the pen 2. Therefore, it is possible to detect that the pen has moved to the next character frame immediately after writing the next character, after writing one character by handwriting by the operator. According to the experimental results of this embodiment, if 100 points per second, that is, every 10 ms is sampled, the position of the pen in the air can be accurately input for a normal writing operation. It is possible to recognize that the pen 2 has moved to the next character frame 3 before writing on the character frame 3.

An operation example of character cutout in the character cutout detection circuit 4 having the above configuration will be described with reference to the flowchart of FIG.

In the control procedure of this flowchart, a variable called the recognition flag F is used as will be described later, and the character frame 3 being input and the inputable area on the character frame are changed to the inputable area on another character frame. The recognition start instruction signal RS is output only when the pen 2 moves. When the recognition flag F is "1", it means that the recognition start signal RS is not sent to the matching circuit 6 while one character is being input or after the input character is updated. When it is "0", it means that the recognition start signal RS has already been sent to the matching circuit 6 and the input character has not changed since then. Furthermore, in the initial state before inputting the first character, the recognition flag F is "0".
Shall be

First, in step S10, the coordinates of the pen 2 and the up / down information of the pen 2 are input, and then the next step S11.
At, it is determined whether the pen is in the up or down state.

If the pen 2 is up, the process proceeds to step S12, and it is determined whether or not the pen is on a character frame other than the character frame 3 being input. If the pen is located on a character frame other than the character frame being input, it is considered that the pen has moved to the next character frame. Therefore, the process proceeds to step S13, and it is determined whether the recognition flag is "1". To do. On the other hand, if the pen is not on a character frame other than the character frame being input, it is considered that the next character is not being written, and the process returns from step S12 to step S10. . If the recognition flag F is "1" in step S13, the character recognition may be started as described above, so the recognition flag F is set to "0" in the next step S15, and the process returns to the start step S1. . However, the recognition flag F is "1" in step S13.
If not, it means that the recognition start signal RS for the input character has already been sent to the matching circuit 6 as described above. Therefore, the process returns from step S13 to step S10 of the start without doing anything.

When it is determined that the pen 2 is in the down state in step S11 described above, the process proceeds to step S16, and it is determined whether or not the down position is the stroke start point. That is, at this time, it is determined whether or not the pen has just changed from the up state to the down state. Specifically, if the previous pen state is up, it is the stroke start point and down If it is, it is determined that it is not the start point of the stroke. If it is not the start point of the stroke, the process returns from step S16 to step S10 of the start, and if it is the start point of the stroke, the process proceeds to step S17 to set the recognition flag F to "1". Further, in the next step S18, it is determined whether or not the coordinates of the pen 2 are within a new character frame other than the character frame currently being input. If it is in a character frame other than the character frame being input, it means that the pen 2 will start writing the next character. Therefore, in the next step S19, the character frame being input is changed to a new character frame. In the subsequent step S20, the character input start signal IS is input to the matching circuit 6, and the process returns to the start step S10. On the other hand, if it is determined in step S18 that the coordinates of the pen 2 are not a character frame other than the character frame being input,
Since the character input is being continued in the same character frame, the process returns to the step S10 of the start.

As described above, according to this example, even if the input pen 2 is not directly touching the tablet 1, the coordinate of the pen on the tablet surface is output by bringing the pen close to the tablet surface on the tablet surface. Before using the pen touch on a new character frame, I am trying to detect the coordinates of the pen in the air by using a tablet that can be used and sampling the output at a sufficiently short time interval. , It is possible to detect that the pen has moved to the character frame. Therefore, when changing the character frame being input in step S19 described above, the recognition start signal RS for the input character has been output before that (see step S14), and before inputting a new character, It is possible to start recognition of the character before that.

Further, as shown in FIG. 4, the character frame may be separated by a straight line 27 indicating the character frame, but as shown in FIG.
A fixed interval may be provided between and the character frame 28. Of FIG.
29 is a dividing line that determines which character frame the pen is in with respect to the coordinates of the input pen.
It grows by a certain amount. This is because the writer (operator) is premised on writing in the character frame 28, but some writer may write outside the character frame. Therefore, an input area slightly larger than the character writing character frame is associated with the character frame.
According to the experiment, it has been found that it is sufficient to set an area, which is larger by 1 mm in the vertical and horizontal directions, as the input area for the character frame 28 inside the character frame 28 of 8 mm to 13 mm square.

In the above-described embodiment, the recognition start signal RS is generated only when the pen 2 moves from the inputable area in or above the character frame being input to the inputable area above another character frame.
Is sent to the matching circuit 6, but the present invention is not limited to this, and the recognition start signal RS is sent to the matching circuit 6 when the pen moves to an enterable area on the tablet surface other than the character frame being input. You may

In addition, a certain function-specified input section for inputting instructions such as deleting the character being input, the inputtable area on that input section, the character frame being input and the inputable area above that character box are displayed. The recognition start signal RS may be sent to the matching circuit 6 only when the pen 2 has moved to any of the inputtable areas on all tablet surfaces except for it.

Furthermore, as shown in FIG. 6, the character frame currently being input is
From the enterable area within or on the character frame 30 or the enterable area above the periphery 31 that has a certain width to the character frame being entered, touch the other character box with a pen or enter the character The recognition start signal RS may be sent to the matching circuit 6 by detecting that the pen 2 has moved to an input enabled area on a character frame other than the input enabled area above the periphery 31 of the frame.

In addition, if there is a pen touch on a specific function-specified input section, characters are cut out and the recognition start signal RS
Is sent to the matching circuit 6, or if there is no pen touch for a predetermined time, the character is cut out and a recognition start signal is sent.
The operator can select and use the most easily proposed character cutout method such as sending RS to the matching circuit 6 and the character cutout method according to the present invention according to the work situation. You may enable it to cut out.

[Effects of the Invention] As described above, according to the present invention, for example, with respect to the character frame being input, the end of the character being input is determined by simply bringing the pen tip close to the adjacent character frame. Since the recognition is started, it is possible to instruct the operator to perform a natural operation, and further, to end the input character even unconsciously. Further, since it is not necessary to input the next stroke, it is effective in the case of the final character input. After the recognition of the stroke that was originally input, which is not required to be input, is started only for the character cutting, the wasteful operation of erasing is unnecessary. This improves work efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic configuration of the device of the present invention, FIG. 2 is a block diagram showing an example of the circuit configuration of the device of the present invention, and FIG. 3 is a character of the device of the present invention of FIG. FIG. 4 to FIG. 6 are plan views showing a character frame and an inputtable area in the embodiment of the present invention. 1 ... Input tablet, 2 ... Input pen, 3,28 ... Character frame, 4 ... Character cutout circuit, 5 ... Feature extraction circuit, 6 ... Matching circuit, 7 ... Dictionary (memory), 8 ... … Display circuit, 27, 29 …… Input area, 30 …… Surrounding frame.

Claims (1)

[Claims] 1. The coordinates of a locus drawn with a pen tip in contact with a tablet surface on which a plurality of character frames are set are determined, and a plurality of inputtable areas corresponding to the plurality of character frames are set. The position of the pen tip positioned in an area above the tablet surface is determined, and the position of the determined pen tip causes the pen tip to move to an inputable area corresponding to a character frame different from the character frame to which the trajectory drawn by the pen tip belongs. An information processing method, comprising: determining that the pen tip has moved, and recognizing a trajectory drawn with the pen tip in contact with the tablet surface in response to the determination of the movement of the pen tip.