JPS5994176A - Handwritten letter recognizing device - Google Patents

Abstract

PURPOSE:To make a special controlling key etc. unnecessary and to make inputting surely and at high speed by indication of specified domain by indicating letters, marks and words for controllig in a specified domain provided in a part of a coordinate inputting board and judging whether the coordinate point of inputted value is included in the specified domain or not. CONSTITUTION:A specified domain 3 that indicates letters, marks and words for controlling is provided in the upper part of the inputting board 2 of a pressure sensitive type coordinate inputting device 1. Output signals of the specified domain 3 of the inputting device 1 are converted to digital values by a A/D converter 4 and added to a recognizing section 5. A register 5a, and a judging circuit 5b are provided in the recognizing section 5, and output of the converter 4 is stored once in the register 5a. When Y coordinate value is contained in the specified domain 3, letter code or controlling signal corresponding to X coordinate value is outputted by the circuit 5b. When Y coordinate value is not contained in the specified domain 3, X and Y coordinate values are outputted as they are, stroke of the recognizing section 5 is detected by a letter recognizing device 6, and letter code is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handwritten character recognition device that recognizes characters input from a coordinate input device.

This type of handwritten character recognition device has the advantage of lightening the burden on the person inputting it, and greatly contributes to improving office efficiency. However, in order to perform character recognition in real time, the ability to discriminate between input points is limited. Therefore, it was not possible to accurately recognize small characters such as ``.'', ``, and `.

Furthermore, it was not possible to input marks other than text, such as trademarks and music notes.

Furthermore, there is a drawback that separate control keys are required for transferring the recognition results, moving the cursor, and indicating that the input characters are alphanumeric characters.

In order to eliminate the above-mentioned drawbacks, the present invention provides a specific area provided on a part of the input panel surface of a coordinate input device in which characters, marks, and control words are displayed, and whether or not the coordinate value of an input point is included in this specific area. and a determination unit that determines whether the coordinate value corresponds to the displayed character, mark, or control word when it is included in the specific area, and outputs the corresponding character, mark, or control word. When the coordinate value of the input point is not included in the specific area, the recognition result of the recognition unit is output, and when the coordinate value is included in the specific area, the recognition result of the determination unit is output.The details will be explained below according to the drawings. explain.

FIG. 1 is an external view of an embodiment of the present invention, in which letters are shown at the top of an input panel 2 of a pressure-sensitive coordinate input device 1 that outputs a signal of a size corresponding to the coordinates of a pressure point.

It is shown that a specific area 3 in which a mark and a control phrase are displayed is provided.

FIG. 2 is a partially enlarged view of FIG. 1, with "" in the specific area 3.

Characters that are difficult to identify such as ", pa,", °゛:''′, ";", marks that are difficult to enter by hand or difficult to identify, such as "゛sha", transfer".

This indicates that a control word such as "alphanumeric" is displayed.

FIG. 3 is a block diagram showing one embodiment of the present invention.
5 has an analog-to-digital conversion circuit (hereinafter referred to as A/D converter) that converts the output signal of the pressure-sensitive coordinate input panel 1 into a digital value, and 5 has a register 5a and a determination circuit 5b. 2, it outputs a character code or control signal according to the X coordinate value, and when the X coordinate value is not included in specific area 2, it outputs the X coordinate value and the X coordinate value as is. Sections and 6 are character recognition devices that detect strokes from the coordinate value output of the pre-recognition section 5 and output character codes corresponding to the strokes.

Next, the operation of the above configuration will be explained with reference to the flowchart of FIG. First, when pressure is applied to one point on the pressure-sensitive coordinate input panel 1 with an indicator pen (for example, a ballpoint pen, not shown), a signal of a size corresponding to the coordinates of the pressure point is output from the pressure-sensitive coordinate input panel 3. Ru.

The output signal from the pressure-sensitive coordinate input board 3 is converted into a digital value by an A/D comparator 14.

Now, the output signal of this person/D″:I/parter 4 is (i, j
), the coordinate value in the X direction is the i-th one from the left, and Y
It is assumed that the coordinate value of the direction indicates the jth direction from the top. Further, it is assumed that the specific region 2 shown in FIG. 2 includes an X coordinate value of 1 to 1o, and is divided into 10 coordinate points in the X direction. Now A/D converter 4
The output coordinate values (Xi, Yj) are temporarily stored in the register 5a of the pre-recognition unit 5, and the determination circuit 5b determines whether or not the coordinate values are included in the specific area 2, and if so, which category they belong to. and determine the coordinate values (Xi, Yj)
, selects and outputs one of the character codes or control signals. The flowchart in FIG. 4 explains the operation of the pre-recognition unit 5. For example, if the coordinate values (i, j) are (5, 5), the character code “.’ is outputted, and ( 5,1
5), it will output the character code “,”, and if it is (5.205), it will output a control signal indicating that the character to be input or the character that has been input is an alphanumeric character. , and if i>10, the coordinate values (l, j) stored in the register 5a are output.

The character recognition device 6 detects strokes from a large number of coordinate values output from the pre-recognition section 5 and outputs character codes corresponding to these strokes, but as described above, the character recognition device 6 receives control information indicating alphanumeric characters. Sometimes (5) Outputs the alphanumeric character code with the highest accuracy from among the recognition result candidates. If the characters to be input are alphanumeric characters or kana characters, use the character code JIS C6220, and if input Chinese characters, use JIS C62.
It is better to use 26. In addition, the mark displayed in specific area 2 is assigned a JIS C6220 or JIS C6226O undefined code, and when this mark is specified, this pre-assigned code is output. good. Furthermore, the recognition section can be simplified by using a microcomputer, but since it is a relatively simple algorithm, it may be constructed only from TTL IC hardware in order to increase the speed.

Furthermore, the present invention is not limited to the above-mentioned embodiments; for example, instead of a pressure-sensitive coordinate input device, a capacitively coupled coordinate input device, an electromagnetically coupled coordinate input device, or a light is used to display characters on a CRT screen. It is also possible to use an optical coordinate dagger device that draws .

As explained in detail above, according to the present invention, a specific area is set for specific characters or marks other than characters (6), and input can be made quickly and reliably by simply specifying this specific area. Another advantage is that no control keys are particularly required.

[Brief explanation of drawings]

Fig. 1 is an external view of one embodiment of the present invention, and Fig. 2 is an external view of one embodiment of the present invention.
FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a flowchart explaining the operation of the block diagram shown in FIG. 3. 1... Pressure-sensitive coordinate input device, 2... Input panel surface, 3...
... Specific area, 4... A/D converter, 5... Preliminary recognition unit, 5a... Register, 5b... Judgment circuit, 6
...Character recognition device. (7) Figure 2 Figure 3

Claims (1)

[Scope of Claims] A handwritten character recognition device that includes a coordinate input device that detects the coordinates of an input point and a recognition unit that performs character recognition from a set of coordinate values detected by the coordinate input device. A specific area provided on a part of the input panel surface that displays characters, marks, and control words, and whether or not the coordinate values of the input point are included in this specific area, and if included in the specific area, the coordinate values are Determine whether the displayed character, mark, or control word corresponds to the corresponding character. a determination unit that outputs a mark or a control word, outputs the recognition result of the recognition unit when the coordinate value of the input point is not included in the specific area, and recognizes the determination unit when the coordinate value is included in the specific area. A handwritten character recognition device characterized by outputting a result.