JPH07160826A - Character detector and character detecting method - Google Patents

Abstract

PURPOSE:To improve the processing efficiency of a character recognition processing without affecting the operation of a handling person by setting a second character frame where a first character frame showing a writing location is included and is magnified on a screen. CONSTITUTION:A display panel control part 7 receiving display data from the display part 11 of a character detector 14 drives a horizontal drive N circuit 3 and a vertical drive circuit 4 and displays a character frame showing the writing location to a handling person on a display panel 1. At the same time, the setting part 12 of the character detector 14 sets a character frame for character detection where the character frame transmitted as display data is included and is magnified, to the display panel control part 7. The handling person operates a pen 9 and enters characters by defining the character frame on the display panel 1 as a reference. The recognition part 13 of the character detector 14 receiving the positional coordinate data from a tablet control part 8 performs a character detection processing and a character recognition processing by defining the character frame set for character detection as a reference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character detection method for handwriting character input suitable for application to, for example, a pen computer, an electronic notebook or the like for inputting using a pen or the like.

[0002]

2. Description of the Related Art A conventional character detection method for inputting handwritten characters will be described with reference to FIG. FIG. 6 is a conceptual diagram for explaining a conventional character detection method in handwritten character input.

FIG. 6A shows a state in which a character frame indicating a writing position is displayed on the screen and a character is written therein. In this example, the outer frame of each character "Ai" is the character recognition range.

The program for detecting character breaks in this method judges the character breaks by tracking the position of the pen and moving the pen outside the frame, or by detecting that there is no character input within a fixed time. To do.

[0005]

[Problems to be Solved by the Invention]
If there is a frame, I try to fill it in, but I tend to put it out of the frame due to its nature. If you fill out the frame as shown in Figure 6 (b),
In the conventional character detection method for inputting handwritten characters, when a part of the character is written, it is determined that the character is finished and the process proceeds to the recognition process.

Even if the frame is enlarged to some extent, the operator tends to write large characters following it, and this does not solve the problem. This has a problem in that the display of the character frame is directly used as the character recognition frame of the system.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a character detection method that improves the processing efficiency of character recognition processing without affecting the operation of the operator.

[0008]

A character detection device according to the present invention comprises means for displaying a first character frame indicating a writing position on a screen, and a first character frame including and enlarging the displayed first character frame. It is characterized by comprising means for setting the second character frame and means for recognizing the position coordinate data within the range of the second character frame for the character written by the pen.

Further, the character detecting device according to the present invention sets a means for displaying a first character frame indicating a writing position on the screen and a second character frame including the displayed first character frame. Means for recognizing the position coordinate data of the character written by the pen within the range of the second character frame, and dynamically determining the position of the character written by the pen and the position of the second character frame. And a means for resetting the second character frame.

Further, the character detection method according to the present invention displays a first character frame indicating a writing position on the screen, and
It is characterized in that a second character frame including and enlarging the displayed first character frame is set, and position coordinate data of a character written by a pen is recognized within the range of the second character frame. .

The character detection method according to the present invention displays a first character frame indicating a writing position on the screen, and
A second character frame including the displayed first character frame is set, the position coordinate data of the character written by the pen is recognized within the range of the second character frame, and the character written by the pen is set. It is characterized in that the second character frame is dynamically reset based on the position and the position of the second character frame.

[0012]

According to the above-described structure of the present invention, first, the display means displays on the screen the first character frame for the writing input by the operator. At the same time, the setting means sets a second character frame that includes and enlarges the displayed first character frame. Then, the recognizing means recognizes the position coordinate data within the range of the second character frame for the character written on the screen by the operator using the pen.

As a result, it is possible to perform character detection with high reading efficiency without affecting the operation of the operator at all and without requiring complicated processing such as character protrusion processing.

Further, according to the above-mentioned configuration of the present invention, first, the display means displays the first character frame on the screen for the handwriting input by the operator. At the same time, the setting means sets the second character frame including the displayed first character frame. Then, the recognizing means recognizes the position coordinate data within the range of the second character frame for the character written on the screen by the operator using the pen. Further, the resetting means dynamically resets the second character frame from the character position written by the operator using the pen and the position of the second character frame.

As a result, it is possible to perform character detection with high reading efficiency without affecting the operation of the operator at all and without requiring complicated processing such as character protrusion processing.

Further, by setting the character recognition frame corresponding to the operator, it is possible to detect characters for further improving the reading efficiency. Further, according to the method of the present invention described above,
First, the first character frame for the operator to input the handwriting is displayed on the screen. Also, at the same time as this, the first displayed
A second character frame including and enlarging the character frame of is set. Then, the position coordinate data of the character written on the screen by the operator using the pen is recognized within the range of the second character frame.

As a result, it is possible to perform character detection with high reading efficiency without affecting the operation of the operator at all and without requiring complicated processing such as character protrusion processing.

Further, according to the above-described method of the present invention, first, the first character frame for the writing input by the operator is displayed on the screen. At the same time, a second character frame including the displayed first character frame is set. Then, with respect to the character written on the screen by the operator using the pen, the position coordinate data is recognized within the range of the second character frame, and further, the character position written by the operator using the pen and the character position The second character frame is dynamically reset from the position of the second character frame.

As a result, it is possible to perform character detection with high reading efficiency without affecting the operation of the operator at all and without requiring complicated processing such as character protrusion processing. Further, by setting the character recognition frame corresponding to the operator, it is possible to perform character detection that further improves the reading efficiency.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a computer system including a character detection device according to the embodiment.

The computer system according to the embodiment is
Display panel 1, tablet 2, horizontal drive circuit 3 and vertical drive circuit 4 of display panel 1, horizontal scanning circuit 5 and vertical scanning circuit 6 of tablet 2, display panel control unit 7, tablet control unit 8 and pen 9, and control Part 10, display unit 1
1, a character detection device 1 including a setting unit 12 and a recognition unit 13
4 and.

The display panel control unit 7, which has received the display data from the display unit 11 of the character detection device 14, drives the horizontal drive circuit 3 and the vertical drive circuit 4 to display a character frame on the display panel 1 to indicate the writing position to the operator. Is displayed.

At the same time, the setting unit 12 of the character detection device 14 sets a character frame that includes and expands the character frame transmitted as display data to the display panel control unit 7. The concept of the character frame displayed on the display panel 1 and the character frame including the character frame and set in an enlarged form will be described with reference to FIG.

FIG. 2 is a conceptual diagram for explaining a character frame to be displayed and a character frame that includes the character frame and is set in an enlarged form. A solid-line rectangle indicated by 15 in the drawing is a character frame displayed on the display panel 1 for indicating the writing position to the operator.

A dotted-dotted rectangle indicated by 16 in the drawing is a character frame for character detection which is set in an expanded form including the character frame 15 for indicating the writing position to the operator. Here, the operator uses the character frame 15 as a reference for Katakana
An example is shown when "" is entered.

At this time, even if the character frame 15 is filled out as shown in the figure, the character frame 16 which is actually set for character detection does not protrude, so that the character recognition is affected. There will be no.

Here, the operator operates the pen 9 to write a character with reference to the character frame on the display panel 1. The tablet control unit 8 always causes the horizontal scanning circuit 5 and the vertical scanning circuit 6 of the tablet to scan a signal at a constant cycle, and when the pen 9 operated by the operator touches the display panel 1, the position of the coordinate is determined. Is detected. Then, this position coordinate data is transmitted to the character detection device 14.

The recognition unit 13 of the character detection device 14 that has received the position coordinate data from the tablet control unit 8 performs a character detection process and a character recognition process based on the character frame set for character detection.

Next, the operation procedure of the embodiment will be described with reference to FIG. FIG. 3 is a flow chart for explaining the operation procedure of the embodiment. First, a character frame indicating the writing position is displayed on the display panel (step A1 in FIG. 3). At the same time, an enlarged character frame including the displayed character frame is set for character detection (step A2 in FIG. 3).

Then, the position coordinate data of the character written by the pen is obtained (step A3 in FIG. 3).
Here, it is determined whether or not this position coordinate data is within the character frame set for character detection (step A4 in FIG. 3),
If it is determined that it is within the character frame (step A4 in FIG. 3)
Y) of position coordinate data is continued. When it is determined that the character is out of the character frame (N in step A4 in FIG. 3)
The recognition process is executed assuming that the characters are separated (step A5 in FIG. 3).

As a result, even for a character entered outside the displayed character frame as shown in FIG. 2, the operation of the operator is not affected at all, and the character protruding process is complicated. It is possible to perform character detection with high reading efficiency without requiring special processing.

Next, an embodiment in the case of dynamically setting a character frame for character detection will be described with reference to FIGS. 4 and 5. FIG. 4 is a conceptual diagram for explaining dynamically setting a character frame for character detection.

The 15 rectangles shown by the solid lines in FIG.
A character frame indicating a writing position displayed on the display panel and 17 circles indicated by double lines represent the character positions actually written by the operator using the pen 9. Therefore, this operator tends to write on the upper right of the character frame indicating the writing position.

At this time, if the character detection processing is performed with reference to the character frame 15, it is inevitable that the processing efficiency of the recognition processing is significantly reduced. At this time, if the character frame for character detection is reset according to the writing tendency of the operator as shown by 16 rectangles shown by the dashed-dotted line in FIG. 4B, the processing efficiency of such recognition processing is reduced. Can be prevented.

The operation procedure in this case will be described with reference to FIG. FIG. 5 is a flow chart for explaining the operation procedure of the embodiment. First, a character frame indicating the writing position is displayed on the display panel (step B1 in FIG. 5). At the same time, a character frame including the displayed character frame is set for character detection (step B2 in FIG. 5). The character frame for character detection may be set to have the same size as the character frame indicating the writing position as an initial setting, or may be set to a slightly larger size.

Then, the position coordinate data of the character written by the pen is obtained (step B3 in FIG. 5).
Here, it is determined whether or not the position coordinate data is within the character frame set for character detection (step B4 in FIG. 5),
If it is determined that it is within the character frame (step B4 in FIG. 5)
Y) of position coordinate data is continued. If it is determined that the character is out of the character frame (N in step B4 of FIG. 5)
The recognition process is executed assuming that the characters are separated (step B5 in FIG. 5).

If the character recognition processing is recognizable (Y in step B6 of FIG. 5), the processing of the character frame is ended. If the character recognition processing is unrecognizable (N in step B6 of FIG. 5), the character frame for character detection is set again.

As a method of resetting the character frame for character detection, the position coordinate data at the time of unrecognizable occurrence generated for each character frame is accumulated, and the character detection for the character detection exceeding the preset threshold value is performed. It is possible to take in the position coordinates outside the character frame as the inside of the character frame for character detection. At this time, it is also effective to set the maximum allowable expansion width for each character frame.

As a result, even when a character is written out of the displayed character frame as shown in FIG. 2, the operation of the operator is not affected at all and the character protruding process is complicated. It is possible to perform character detection with high reading efficiency without requiring special processing. Furthermore, since the character frame for character detection is set according to the writing tendency of the operator, it is possible to perform character detection with higher reading efficiency.

[0040]

As described above in detail, according to the present invention, character detection with high reading efficiency is performed without affecting the operation of the operator at all and without requiring complicated processing such as character protrusion processing. It becomes possible to do. Further, by setting the character recognition frame corresponding to the operator, it is possible to perform character detection that further improves the reading efficiency.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a computer system including a character detection device according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram for explaining a displayed character frame of the embodiment and a character frame that includes the character frame and is set in an enlarged form.

FIG. 3 is a flowchart for explaining an operation procedure of the embodiment.

FIG. 4 is a conceptual diagram for explaining dynamically setting a character frame for character detection of the embodiment.

FIG. 5 is a flowchart for explaining an operation procedure of the embodiment.

FIG. 6 is a conceptual diagram for explaining a conventional character detection method.

[Explanation of symbols]

1 ... Display panel, 2 ... Tablet, 3 ... Display panel horizontal drive circuit, 4 ... Display panel vertical drive circuit, 5 ... Tablet horizontal scanning circuit, 6 ... Tablet vertical scanning circuit, 7 ... Display panel control unit, 8 ... Tablet control Part, 9 ... Pen, 1
0 ... Control unit, 11 ... Display unit, 12 ... Setting unit, 13 ... Recognition unit, 14 ... Character detection device, 15 ... Display character frame, 16 ...
Character frame for character detection.

Claims (4)

[Claims] 1. A computer system for inputting position coordinate data designated by using a pen on a screen, means for displaying a first character frame indicating a writing position on the screen, and the displayed first character frame. And a means for recognizing position coordinate data within a range of the second character frame for a character written by a pen. Character detection device. 2. A computer system for inputting position coordinate data designated by using a pen on a screen, means for displaying a first character frame indicating a writing position on the screen, and the displayed first character frame. Means for setting a second character frame that includes, a means for recognizing position coordinate data of a character written by the pen within the range of the second character frame, a character position written by the pen and the second character position And a unit for dynamically resetting the second character frame based on the position of the character frame. 3. A computer system for inputting position coordinate data designated with a pen on a screen, displaying a first character frame indicating a writing position on the screen, and displaying the displayed first character frame. A character detecting method comprising: setting a second character frame that is included and expanded, and recognizing position coordinate data of a character written by a pen within a range of the second character frame. 4. A computer system for inputting position coordinate data designated with a pen on a screen, displaying a first character frame indicating a writing position on the screen, and displaying the displayed first character frame. The included second character frame is set, the position coordinate data of the character written by the pen is recognized within the range of the second character frame, and the character position written by the pen and this second character frame A character detection method characterized by dynamically resetting the second character frame from the position.