JPS61223972A - Online handwritten information processing device and method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a handwritten word processor, and particularly to a cursor display control method that allows a cursor to be specified without being aware of the mode.

[Background of the invention]

0 handwritten characters! Currently, Japanese Unexamined Patent Application Publication No. 59/1989 is being developed as a curtling display control method for character input devices or word processors using human intelligence.
As seen in No. 83279 and handwritten word processor products, a cursor display control system using cursor keys that can be moved up, down, left, and right in the same way as a keyboard has become mainstream. On the other hand, as shown in Japanese Patent Application Laid-Open No. 59-27382, a handwritten character input device using an input-integrated flat display in which input and display are integrated is disclosed, but in these devices, direct display is not possible for character input. Basically, there is no need to display a cursor since you can enter characters where you want. However, when editing such as inserting characters using the menu, it is better to have a cursor display.
The editing process can be made clear, which improves the man-machine nature.

However, when entering characters by hand and displaying a cursor, the conventional method requires pressing a cursor movement key or other function key to change the mode from stroke mode (recognition mode) to cursor mode. There was a pause in my thinking. For this reason, there was a problem with man-machine performance.

[Purpose of the invention]

The present invention aims to improve the above-mentioned drawbacks and provides a cursor display control method that does not require mode change specification.

[Summary of the invention]

The present invention focuses on feature quantities of the first stroke among strokes for character recognition, such as stroke length, pen-down time (referred to as stroke time), or elapsed time after pen-up (referred to as stroke-off time), etc. In 0 character recognition, which focuses on character values, compares these feature amounts with a predetermined threshold value, and uses the results to control whether or not to display a cursor, characters that are particularly short in one stroke are identified by the feature symbol "," Do not input anything other than ', and conventionally very short and small strokes have been rejected as relevant input strokes. Focusing on this point and considering the characteristics of the first stroke of one character, even if you control the cursor display, character recognition will not be possible. does not affect.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described using FIGS. 1 to 6.

FIG. 1 shows a block configuration of one embodiment of the present invention. Reference numeral 1 denotes a coordinate input device, which is composed of an electrode tablet and the like. 2 is a stylus pen, and 3 is a display device such as a flat display such as a liquid crystal display. The coordinate input device is transparent, and by integrating it with the display device 3, it is possible to realize a working form similar to the conventional paper and pencil. Blocks 4 to 10 can be realized as software processing inputs of a microcomputer, and can be roughly divided into a coordinate processing section 4, an area judgment processing section 5, a stroke feature extraction and judgment processing section 6, a character recognition processing section 7, and a cursor processing section. It is composed of a control processing section 8, a mode control processing section 9, and a display processing section 10.

The operation of one embodiment of the present invention will be briefly described with reference to FIGS. 1 to 4.

Figure 2 shows the functional areas of the coordinate input bag [1] and the display device 3. Areas Al and A2 are areas for character recognition in the stroke entry bag and display areas for displaying recognized characters. be. Area A1 is an area for directly inputting characters, and area A2 is an auxiliary character input area for editing such as inserting characters. On the other hand, area B is a mode designation control area for designating editing such as insertion and deletion of character strings.

Now, in FIG. 1, when a stroke is input to the coordinate input device 1 with the stylus pen 2, the stroke is sampled in the coordinate input process 4, and the area determination shown in FIG. 2 is performed. If it is in area A1 or A2, the process moves to the side a in FIG. 1, and stroke feature extraction and determination process 6 is performed. On the other hand, if it is in area B, processing moves to side b, and mode control for editing such as insertion or deletion is performed.

When the stroke feature extraction and determination process 6 determines that the stroke is a character stroke (side a), the character recognition process 7 is executed. On the other hand, if it is determined that the cursor is designated (side a), cursor control processing 8 is performed. Then, character display and cursor display are performed by display processing 10.

A processing example of the present invention will be further explained using FIGS. 3 and 4. Figure 3 shows an example of processing when inserting a character. In (a), the stroke is determined to be a character stroke, is recognized, and "
This is the screen where the character strings of the handwriting system are displayed.

Here, if you want to insert the character string "recognized" before the character string "system", enter a character stroke in area A2, this will be recognized and a fair copy will be displayed. Next, the character 'shi' will be displayed. For example, if you enter a short stroke into the character frame that is marked, this will be recognized as a cursor designation, and as shown in Figure 3 (
As shown in b), when the pen is pressed down on the "insert" menu in the 0th order area B where the cursor mark (reverse display) is displayed, this stroke is determined to be mode control (FIG. 3(c)).

As shown in FIG. 3(d), the character string "recognition" is inserted.

Figure 4 is an example screen for deleting one character string. When you want to delete one character string "system", specify the first character in Figure 4 (a) and the last character in Figure 4 (b). .This is also the third
Specify with short strokes as shown in the figure. Then, (
As shown in b), the first character "shi" and the last character "mu" are displayed in reverse.

When the deletion range is visually visible, when the user presses down on the "delete" menu as shown in FIG. 4(Q), the character string "SYSTEM" is deleted as shown in FIG. 4(d).

In the mode where one character string is input as above,
Since the cursor mark can be directly marked without operating keys for specifying the cursor, man-machine performance can be improved.

7 In FIGS. 3 and 4, when performing insertion or deletion editing, the object is specified first and then the insertion or deletion command is specified, but this may be done in the reverse order.

FIG. 5 shows a specific processing flow of processes 4 to 10 in the block diagram of FIG. 1, and corresponds to the process as follows.

(1) Coordinate input processing 4; Steps 100, 101 (2)
Area determination processing 5; Step 102 (3) Stroke feature extraction & determination processing 6; Steps 103 to 109. Steps 113-114 (4) Character recognition processing 7; Step 11
5(5) Cursor control processing 8; Step 11o.

(6) Mode control processing 9; Step 118 (7) Display processing 10; Steps 112, 116 to 117.119 In the processing flow of Fig. 5, as shown in Fig. 6, the stroke length a , and stroke off time t01. is used.

In other words, the following formula is obtained.

Q, = ΣCAx, +Δyt) ... (1
)t−**= (two two)
...(2) Here, A Xi, A y are sample coordinate point sequences Pi.

The distance between P, , 0 along the Xyy axis is called the city block distance. Of course, it may be determined strictly by Euclidean calculation, where n is the number of sample points minus 1. On the other hand, jloml is the current time, tl. is the pen-up time of the first stroke. Note that the stroke-on time tl
lll is determined by the following formula. However, it is not used in Figure 5.

j--” (two-t M.) ...(
3) Here, tl. is the pen-down start time of the first stroke.

According to FIG. 5, there are two conditions for moving to cursor control.

(1) Condition 1: In the first stroke of a character, is the stroke length a the threshold value Q? m, and the stroke off time t,,1 is larger than the threshold value ttw (step 1
03,104 judgment).

(2) Condition 2: Is the stroke length Q1 of the first stroke of the previous character the threshold value Q? When the first stroke of a character smaller than ll and another character is input (determination in steps 105 and 106).

Due to the above conditions, even if the stroke length of the first stroke is smaller than the threshold value, if the second stroke is input immediately, the process of steps 113 and 114 will cause the stroke of one character recognition without shifting to cursor control. becomes. This means that even if the stroke is a short stroke such as a character "shi" or "go", if the second stroke is input immediately, the first stroke becomes a character stroke.

When the cursor is instructed to pen down the mode control area, the corresponding mode control is executed as determined in step 102. For example, in the case of insertion, the character string input in area A2 is inserted at the designated cursor position, and in the case of deletion, the character string between the two designated cursor positions is deleted.

The cursor is cleared after mode control is executed (step 1
19).

Note that the detailed description of the character recognition process (step 115) will be omitted since various online character recognition methods have been published.

As described above, according to one embodiment of the present invention, if you want to edit a character immediately while inputting a character, the mode automatically moves to cursor specification based on the characteristics of the stroke.
It can be done with less confusion in thinking, and man-machine ability is greatly improved. Stroke characteristics include the stroke length a of the first stroke of a character, and the stroke off time tm, which is the elapsed time from the pen-up time of the first stroke.
Since tM is used, character strokes and strokes for specifying the cursor can be clearly distinguished.

As another embodiment of the present invention, a similar effect can be obtained by combining the stroke-on time t from pen-down to pen-up of the first stroke with other feature quantities.

In addition, although the present invention uses a device that integrates input and display, they may be separated, but in this case, it is necessary to always display where the current cursor is when there is no stroke. Marker display control is the same as in the present invention.

〔Effect of the invention〕

As described above, according to the present invention, cursor designation can be made without specifying a mode for cursor designation, so that thoughts are not disturbed and man-machine performance is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
i! 1 to 4 are diagrams for explaining the operation of one embodiment of the present invention, FIG. 5 is a diagram for explaining the processing flow of one embodiment of the present invention, and FIG. 6 is a diagram for explaining the processing flow of one embodiment of the present invention. It is an auxiliary figure. 1... Coordinate input device, 2... Stylus pen, 3...
... Display device, 4... Coordinate input processing unit, 6... Stroke feature extraction & determination processing unit, 7... Character recognition processing unit, 8... Cursor control processing unit, 10... Display processing Department.

Claims (1)

[Scope of Claims] 1. Coordinate input means for detecting handwritten strokes; character recognition means for inputting stroke coordinates and character frame information obtained by the coordinate input means to recognize characters; and the character recognition means for recognizing characters. In a handwritten word processor equipped with a display means for displaying characters and a cursor as a result of recognition, a feature amount is extracted from first stroke information input first in the character frame, and this feature amount is compared with a predetermined threshold value. A cursor display control method for a handwritten word processor, characterized in that the cursor display is controlled based on the determination result. 2. The feature amounts recited in claim 1 include at least the stroke length of the first stroke, the stroke-on time from pen down to pen up of the first stroke, and the first stroke length.
A cursor display control method for a handwritten word processor, characterized in that the stroke off time is the elapsed time from pen up of a stroke. 3. A cursor display control method for a handwritten word processor according to claim 2, characterized in that the cursor display is controlled by combining the comparison and determination results of the plurality of feature quantities. 4. In claim 3, as one of the combinations, when it is determined that the stroke length is shorter than a predetermined threshold value and the stroke off time is greater than a predetermined threshold value, the cursor is moved. A cursor display control method for a handwritten word processor characterized by displaying the cursor.