JPH046995B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an online character recognition device that recognizes characters based on handwriting input online.

Conventionally, there have already been methods for recognizing characters based on handwriting entered online. For example, a method using pattern matching as described in Japanese Patent Application No. 56-194174 (hereinafter referred to as Document 1) is effective. When recognizing characters, it is necessary to determine which part of a written handwriting constitutes a single character. There have been several methods for this determination.

The first method is to place a square on the tablet for inputting handwriting, and then write the handwriting written within the square.
This is a method in which the handwriting constitutes one character. With this method, if a handwriting appears in the square next to it, it is considered the next character. This had the disadvantage that the letters had to be written without extending beyond the squares.

The second method is to measure the time from when the tip of a writing pen leaves the tablet to when it touches the tablet again, that is, the time between strokes of a character, and then calculate this time to a certain threshold. This is a method that marks the end of writing a character when it reaches the top. With this method, once you start writing a letter, you have to write it all at once without stopping until the end. Kana and English characters are usually written without pauses, but when writing characters such as kanji, which require a large number of strokes, the pen often stops for a short while while writing. This method had the disadvantage that even when a character was still being written, if the pen was paused, it would be mistakenly determined to be the end of the character, making it impossible to input characters such as kanji correctly.

It is an object of the present invention to enable characters to be written without being distracted by the eyes, and to input characters correctly without being mistakenly judged as the end of writing even if the pen is stopped in the middle of writing. The purpose of this invention is to realize an online character recognition device that can perform the following functions. To achieve this object, the online character recognition device according to the present invention includes a timer that measures the time between strokes when writing a character, and a timer that measures the time between strokes when writing a character, and 1 when the time measured by the timer exceeds a predetermined threshold. The writing apparatus includes a character recognition section that recognizes a character by determining that it is the end of writing the character, and a switch that resets the time measurement in the time measurement section.

The present invention will be described in detail below based on a specific example. The figure is an overall configuration diagram of an embodiment according to the present invention. Handwriting information C of characters input from the tablet section 1 is input to the character recognition section 2 and held. At the same time, pen on/off information P is input from the tablet section 1 to the timer section 3, and the time from when the pen is turned off to when it is next turned on is measured. When this time measurement value exceeds a certain predetermined threshold value, it is determined that one character has been written, and a recognition instruction display R is output from the timer section 3 to the character recognition section 2. Moreover, although 100 to 300 msec is appropriate as this threshold value, it may be possible to set it according to the user.

When the recognition instruction display R is input, the character recognition unit 2
Then, the handwriting information C that had been held until then is recognized as one character. This recognition method has
Assume that a pattern matching method as shown in (1) is used. The contents of the time measurement in the timer section 3 are reset by pressing the switch 4. Time measurement is not performed while switch 4 is kept pressed.

If you want to pause the pen while writing,
Just press this switch. Since the recognition instruction signal R is not generated while the switch is pressed, even when the pen is rested, it will not be mistakenly determined that the writing of a character has ended. With the conventional method of determining the end of a character based on the time between strokes, it was not possible to rest the pen while writing, but this method has the advantage of allowing the user to freely rest the pen with a simple operation. have

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment. In particular, as the character recognition method in the character recognition unit 2, all the conventionally proposed methods can be applied.

[Brief explanation of drawings]

The figure is a block diagram showing the overall configuration of an embodiment according to the present invention. In the figure, 1 is a tablet section, 2 is a character recognition section, 3 is a clock section, and 4 is a switch.

Claims (1)

[Claims] 1. A timing section that measures the time from finishing one stroke to starting writing the next stroke when writing a character, and when the time measured by the timing section exceeds a predetermined threshold, one character is written. An online character recognition device comprising: a character recognition unit that recognizes the character by determining that the character is the end; and a switch that resets the time measurement in the time measurement unit.