JPH07107697B2 - Character learning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A character learning device provided for learning how to write a character, wherein in evaluation of a character pattern input by a learner, discrete points including intersections on the character pattern in the order of strokes. The time required for evaluation is shortened by using the series of coordinate values of.

[Industrial application field]

The present invention relates to a character learning device used for learning how to write characters such as Chinese characters.

The character learning device is a device that collates a character pattern input by a learner with a model character pattern prepared in advance, evaluates their inferior and inferior skills, and gives some advice to the learner based on this.

Figures 4 (a) and 4 (b) show the Chinese characters "Sat" and "Kaku", respectively.
It is a figure showing the character pattern of, and in (a), when the length of the part above the intersection with the first stroke of the strokes of the second stroke is short, it is mistaken as "work" of (b). There is a fear. Therefore, this part must have a certain length.

In addition, the length of the partial stroke from the end point of a stroke to the intersection or contact point (hereinafter collectively referred to as "intersection") in many characters including "Kiki" and "Kana" is not limited to Kanji. It is often used as a criterion for the skillful evaluation.

On the other hand, it is important that advice be given to learners promptly and in a timely manner. At this time, it is necessary to be able to accurately and quickly calculate the adequacy of the length from the end point of the stroke to the intersection.

[Conventional technology]

FIG. 5 is a block diagram of a conventional example of a character learning device that is used for learning how to write characters. 1 shows the coordinate values of discrete points on a character pattern input by handwriting in stroke order for each stroke. The coordinate detecting unit for detecting 2, the intersection detecting unit for detecting the coordinate value of the intersection on the character pattern represented by the sequence of the detected coordinate values, 3 the coordinate value of the coordinate value detected by the coordinate value detecting unit 1. From the series and the coordinates of the intersection detected by the intersection detection unit 2,
A stroke length calculation unit for calculating a partial stroke length from an end point to an intersection of a predetermined stroke, a dictionary unit for storing a series of coordinate values and a partial stroke length obtained in advance in the same manner as described above from a model character pattern, Is an evaluation unit that evaluates the skillfulness or correctness of the input character pattern by collating the partial character length obtained by the character length calculation unit 3 with the partial character length of the model character pattern stored in the dictionary unit 4. is there.

[Problems to be solved by the invention]

In the character learning device having the above-described configuration, the coordinate detection unit 1 and the intersection detection unit 2 convert a series of coordinate values (b) and coordinate values of intersections (from a character pattern (+) as shown in FIG. c) is obtained and given separately.

This will be described with a more specific example. That is, it is assumed that the digitizer for detecting the coordinate position of the writing instrument is used to obtain the series of coordinate values of the horizontal line in FIG. 6 (a). The starting point (X1, Y1) is obtained as the first contact point of the writing instrument. Since the digitizer reads the coordinate position several tens of times per second, the next movement position is read. When this amount of movement is smaller than a certain value, it is ignored, and meaningless expansion of the coordinate data is prevented. In this way, the series of coordinate values of the horizontal line is obtained, and the end point (Xn, Yn) is obtained as the point where the writing instrument separates.

The intersection (X, Y) is a line segment (Xa, Y
a), (Xa + 1, Ya + 1), a = 1,2, ・ ・ ・ ・ ・ n-1 and the series of vertical line coordinate values is (X′1, Y′1), ・ ・ ・ ・ ・
Line segments (X'b, Y'b), (X'b + 1, Y'b + 1), b = 1, 2, consisting of adjacent coordinate values when (X'm, Y'm)
······················· m−1, the line segment (Xi, Yi), (Xi + 1, Yi + 1) and (X′j, Y′j), which have the intersection,
(X'j + 1, Y'j + 1) is selected and (X, Y) is calculated and obtained as the intersection.

Therefore, when the stroke length calculation unit 3 tries to find the length of the partial stroke pattern from the start point (X1, Y1) of the stroke of the first stroke to the intersection (X, Y), in the illustrated example, For each point up to, it is necessary to integrate the lengths between two adjacent points while confirming that they are before (X, Y) in the stroke order. Therefore, for example, the vectors from the intersections of the respective line segments are calculated one by one, and the vectors are inverted before and after the intersections to identify the anteroposterior relationship between the line segments and the intersections. Therefore, it takes a long time to calculate the length from the end point (start point) to the intersection.

That is, an object of the present invention is to provide a character learning device that can obtain the partial stroke length from the end point on the stroke to the intersection in a short time.

[Means for solving problems]

FIG. 1 is a block diagram of the principle of the present invention. In addition to the reference numerals common to FIG. 5 and the conventional example, 6, the coordinate value of the intersection point (X, X,
Y) is the sequence (X1, Y1) of the first coordinate value detected by the coordinate detection unit 1. (X2, Y2) .... (X1, Y). (Xi + 1, Yi +
1) ..... (Xn, Yn) is inserted in the order of strokes to form a second series of coordinate values (X1, Y1). (X2, Y2) .... (Xi, Y
i). (X, Y). (Xi + 1, Yi + 1) ..... (Xn, Yn) is inserted into the data insertion section 3 ', and a predetermined number is defined for each Chinese character from the series of the second coordinate values converted by the data insertion section 6. The stroke length calculation unit for calculating the partial stroke length from the end point of the stroke to the intersection, 4'prestores the series of the second coordinate values and the partial stroke length obtained from the model character pattern in the same manner as described above. It is a dictionary section.

Inserting intersections in the order of strokes means that in the case of the line of the start point (X1, Y1) and the end point (Xn, Yn), the movement order of the brushes (Xa, Ya) a = 1,2,
·····, n, when the intersection is between a = i and a = i + 1, the coordinate values (X, Y) of the intersection are (Xi, Yi) and (Xi +
1, Yi + 1).

[Action]

That is, based on the series of the first coordinate values detected by the coordinate detection unit 1 and the coordinate values of the intersections detected by the intersection detection unit 2, the coordinates of the discrete points including the intersections on the input character pattern. By using the series of values, the length from the predetermined end point to the intersection is calculated in a short time.

〔Example〕

FIG. 2 is a block diagram of the embodiment, 7 is a first buffer for temporarily storing the series of the first coordinate values detected by the coordinate detection unit 1, 8 is an intersection point detected by the intersection point detection unit 2. Second buffer for temporarily storing coordinate values, 9 for a third buffer for temporarily storing a series of second coordinate values obtained by the data inserting unit 6, and 10 for a second buffer stored in the third buffer 9. A pointer for storing the address at which the coordinate value of the intersection point in the series of coordinate values is stored, and 11 is a display section for presenting the evaluation result of the evaluation section 5 to the learner.

In the stroke length calculation unit 3 ', in the calculation of the partial stroke length from the predetermined end point to the intersection in the character pattern, the lengths between the two adjacent points from the end point to the point indicated by the pointer 10 are simply sequentially integrated. The desired partial stroke length can be calculated with.

The evaluation unit 5 collates the partial stroke length calculated by the stroke length calculation unit 3'with that of the model character pattern stored in the dictionary unit 4 ', and determines whether the difference between the two exceeds a predetermined ratio. ， Evaluate the skill of the input character pattern.

As shown in FIG. 3, the display unit 11 displays model character patterns and input character patterns in display areas A and B, respectively.
Is displayed on the basis of the evaluation result by the evaluation unit 5, and the indicated partial character pattern is displayed by, for example, a bold line,
A comment such as “the part indicated by the bold line is too short, let's lengthen it” is displayed in the comment area C.

〔The invention's effect〕

As described above, according to the present invention, the predetermined partial stroke length can be obtained in a short time by a simple process. Therefore, the input / output of the input character pattern can be evaluated in a short time and input. Partial patterns that are not long enough in the character pattern can be quickly displayed by using bold lines, colors, etc. and commented to the learner.

[Brief description of drawings]

 FIG. 1 is a principle diagram of the present invention, FIG. 2 is a configuration diagram of an embodiment, FIG. 3 is an explanatory diagram of the embodiment, FIGS. 4 (a) and (b) are explanatory diagrams of fields of use, and FIG. The configuration diagram of the conventional example and FIGS. 6A to 6C are explanatory diagrams of the conventional example. In the figure, 1 is a coordinate detection unit, 2 is an intersection detection unit, 3'is a stroke length calculation unit, 4'is a dictionary unit, 5 is an evaluation unit, 6 is a data insertion unit, 9 is a third buffer, and 10 is a pointer. Is.

Claims (1)

[Claims] 1. A coordinate detection unit for detecting coordinate values of discrete points on a character pattern input by handwriting for each stroke in a stroke order, and a series of first coordinate values detected and stored in the stroke order. An intersection point detection unit that detects the coordinate values of the intersection points on the character pattern that is represented, and inserts the detected coordinate values of the intersection points into the series of first coordinate values that are detected and stored in the stroke order in the order of strokes. A character learning device, comprising: a data insertion unit that converts a sequence of two coordinate values.