JPH0415507B2 - - Google Patents

Description

[Detailed description of the invention]

(Technical Field) The present invention relates to an online handwritten character recognition device that recognizes kanji, kana, and Japanese written on a tablet. (Background technology) Various methods have been proposed for inputting kanji and mixed Japanese from a keyboard, but all of them require skill, so recently online handwriting, which involves inputting characters by writing them on a tablet with a pen, has been proposed. A character recognition device has been developed. A block diagram of a conventional general online handwritten character recognition device is shown in FIG. Reference numeral 1 denotes a tablet for generating trajectory information of characters written by the input pen 2; 3 receives writing point movement information from the tablet 2, and uses known recognition methods such as the length and shape of the strokes constituting the characters; recognition methods using geometric features such as
A recognition unit that generates a code corresponding to a recognized character using a recognition method that uses the features of radicals and partial patterns such as 时 and kan, the relative positional relationship between them, and the order of writing. It consists of a multiplier and a dedicated microprocessor. Reference numeral 4 denotes a first dictionary section which stores characteristic data of each character and its character code used in the recognition method performed by the recognition section 3, and 5 controls the operation of the entire recognition device and also imports the recognized character code. The controller reads the corresponding dot pattern data from the font memory 6 and visually outputs the recognized characters to the monitor display 7 or printer 8, and is comprised of a central processing unit (CPU) and memory. Next, an example of a handwritten character recognition procedure in the above configuration will be described. When characters are written on the tablet 2 with the pen 1, the XY coordinates of the point of the pen tip are sequentially output as the pen moves and are sent to the recognition unit 3. The recognition unit 3 first performs known preprocessing such as smoothing and sampling, and recognizes basic strokes as shown in Table 1 below. For example, if a B stroke is recognized after a C stroke, “I”
In other words, recognize that it is "Ninben". Similarly, if strokes A, B, C, and D are recognized in sequence, it is recognized that it is a "tree". When CB = "I" = α, ABCD = "Tree" = β are stored in the dictionary section 4, and αβ = "Kyu" is stored, on the tablet 2 /+|+-+ If it is drawn as ｜＋／＋＼, it is recognized as a “day off”.

[Table] An example of the dictionary section 4 is shown in Table 2. As shown in Table 2, the basic patterns are in the sub-pattern section of the dictionary section 4: −+|+丿+〓=ABCD=“tree”=β |+〓+−+−+−=BGAAA=“eye” = γ, it is written as βγ.

【table】

Claims (1)

[Scope of Claims] 1. A pen, a tablet for generating trajectory information of characters written by the pen, and a recognition device for recognizing written characters based on the trajectory information and generating character codes corresponding to the recognized characters. a dictionary section that stores characteristic data of each character and its character code used in the character recognition method of the recognition section; a font memory that stores dot pattern data representing each character; An online handwritten character recognition device consisting of an output display device or printer, and a control section that reads dot pattern data corresponding to the character code transferred from the recognition section from the font memory and transfers it to the display device or printer. A switch that switches the operation between a recognition mode for character recognition and an index mode for recognizing an index, and an index code corresponding to a written character recognized as an index by the recognition unit, which corresponds to the index. The index section generates address data in the dictionary section of the character group, and the character recognized by the recognition section or specified in the index section according to the control signal from the control section based on the switching signal according to the state of the changeover switch. and a switching unit that retrieves the character code of one of the character groups from the dictionary unit, and in the index mode, the first sound of the pronunciation kana of the desired kanji written on the tablet or the radical name of the kanji. The recognition unit reads an index code corresponding to the index data from the dictionary unit, and reads a character group corresponding to the index code from the dictionary unit as candidate characters of the desired kanji based on the address data corresponding to the index code. The online handwriting is characterized in that in the recognition mode, the recognition section recognizes the characters written on the tablet according to the contents of the dictionary section and displays them on the display device or printer. Character recognition device.