JPS6172324A - Graphic input device - Google Patents

Abstract

PURPOSE:To improve greatly the graphic input speed and operability by recognizing the handwritten characters and an input pattern through a tablet and calculating the degree of approximation between the handwritten pattern and a pattern already supplied. CONSTITUTION:A graphic input device 10 recognizes characters or patterns based on the coordinate data given from a tablet 12. A character recognizing part 103 works for recognition of characters; while a pick detecting part 102, a pattern recognizing part 104, an approximation degree calculating part 105, a coordinate value calculating part 106 and an end point/contact calculating part TREQ 107 are actuated for recognition of patterns respectively. Then a coordinate value input part 100, a stroke end detecting part 101, a graphic memory 108, a display control part DSP 109 and a plotter control part 110 are actuated for recognition of both characters and patterns. A CRT 11 displays the results of recognition of input handwritten characters and a handwritten input pattern or this pattern written out fair. Then the plotter 14 delivers a drawing copied out fair.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is a CAD (Computer Aided D
esiga) This invention relates to a figure input device that allows figures to be entered by online handwriting when inputting figures into a system.

[Technical background printing of the invention and its problems]

When inputting figures into a CAD system, especially figures from mechanical drawings, conventional devices require multiple selection and combination of dozens of different and similar commands via a tablet and keyboard. It was necessary to specify the coordinate position precisely.This required a lot of time and placed a heavy burden on the operator if he was not familiar with the operation method.Also, he had to operate two devices: a keyboard and a tablet. Because of this, the space efficiency of equipment installation was poor.

[Objective of the First Man] The present invention was made in order to overcome the drawbacks of the prior art described above, and it is easy to operate even by a designer who is not familiar with the operating method of a CAD system, and it is easy to use on a designer's desk. The purpose of the present invention is to provide a highly space-efficient graphic input device that can be installed in a computer.

[Summary of the invention]

The present invention combines handwritten character recognition, hand-1iF figure recognition, and proximity position calculation between figures to recognize the conventional command (; equivalent instruction) inside the device, and also calculates the coordinate position of the input figure inside the device. Calculate with hand V
This is a graphic input device that generates a clean drawing from input characters and 9 graphics.

[Example of drawing]

FIG. 2 shows the overall configuration of the drawing input device according to the present invention.

Inputting text and characters is done by handwriting on the tablet [2] using a stylus pen 13.
ll displays the recognition result of the input handwritten character, the handwritten input figure, or the figure of the mausoleum that has been neatly formatted, and also displays several command menus. Plotter 14 outputs a clean-cut surface. The graphic input device main body 10 recognizes characters, ma&, or figures based on the coordinate data sent from the tablet 12.

This part is shown in detail in Figure %1. For character recognition, the CREC 103 that performs character recognition processing operates, and for figure recognition, the pick cutting unit PICK102° figure recognition unit 104. Proximity calculation unit DIST105. Coordinate value calculation unit LOC106, end point for calculating end points and contact points.

The contact calculation unit 'l'REQ107 operates. Coordinate value input unit IN 100 other than these, edge detection unit 8DBT 101, figure memory MEMOKY 108,
A display control unit DSP109 controls the display of the CRT, and a plotter control unit PLOTIIO controls the output to the plotter.
is a part that operates in common to character recognition and figure recognition.

The operation of the present invention will be described with reference to an example of graphic input shown in FIG. FIG. 3(a) is an example of inputting a straight line L5 connecting the intersection of straight lines L1 and L2 and the intersection point 8 of straight lines L3 and L4.

In the conventional device, in order to specify point A, a command for specifying the intersection between straight lines must be entered from the keyboard (FIG. 5, Fl), and then the stylus pen of the tablet is moved to indicate straight lines L1 and L2 with the cursor. (F3 in Figure 5, called Big).

Point B is also obtained by the above operation. Next, enter the command to input a straight line from the keyboard.
l) A subcommand indicating that the input specifies the start point and end point is input from the keyboard (F2 in FIG. 5).

To specify the starting point and ending point, move the cursor to match the above two points A and H (F3 in Fig. 5). When the above operations are completed, the straight line L5 you want to input will be displayed on the CRT.
F4 in Figure 5).

On the other hand, in the present invention, the stylus pen 13 is moved on the tablet 12, the cursor displayed on the CRT 11i is brought to the vicinity of a point, and the pen is moved down to point B in the same way as when writing with a pen. There is no need to input commands or read commands using conventional equipment. The operation of the present invention when this operation is performed will be described with reference to FIG. IN 100
The coordinate values of the stylus pen 13 inputted via the PEQ 104 and DIST 105 are passed. This value is simultaneously sent to the CRT II via the CD5P 109 to display the handwritten figure.

8DET101 was the first time a black person put down his pen and started writing.
PR) sends signals to iQ 104 and DIST 105 to start their respective operations. DI8'l'105
accesses the MEMOKY 108 in which the input cylinder straight lines L1 to L4 and other graphic data are stored, and calculates the coordinate values after pen down and the input cylinder straight lines (i.e. L1 to L4).
) and sends this result to T FLBQ 107. The PRgQ 104 inputs the coordinate values of the stylus pen 13 via the IN 100 and calculates the stroke vector of the handwritten figure. When you lift up the stylus pen 13 near point B, the SDI indicates that you have finished writing! iT 1
01 #i, Konoko and DIST105 and PR1
13Q 104 Notify. DIST 105 is bay
The operation ends with 7 taps. TRgQ107 is DIS
Straight line L1 or L2 from the distance sent from T105
Start from the coordinates close to the end point of and draw the line L3 or L
Recognize that you have finished writing at the coordinates close to the end point of 4, and set the coordinate values of the start and end of writing to points A and B and LOC10.
Send to 6. The PRBQ 104 recognizes the shape of the input figure from the calculation result of the stroke vector. In this example, it is recognized as a straight line. The code representing the figure format of the recognition result is LOC10.
Send to 6.

LOC! 106 is p RBQ 104 The retegle figure code sent from KA is a straight line, and the two coordinate values sent from TREQ107 are point size and 2 from the coordinate value of B.
Determine that it is a straight line with two coordinate values as the start and end points/
Ru. This data is stored in the MEMORY 108 and sent to the CT 11 via the DSP 109, erasing the handwritten figures that had been stored up to that point and displaying the clean-cut figures.

FIG. 3(b) shows two straight lines L6. Touching L7 and radius value is 1
This is an example of inputting 00 yen. Input a straight line and have your colleague move the stylus pen 13 to input a straight line L5. Input a circle close to L7 by hand. Radius Hani uses the stylus pen L3 to write and input the number 1 number as a colleague. The first character R is an identification character indicating that the numerical value is a radius. Character input and graphic input may be the reverse of the above. Straight line L6.Similar to straight line input. Bic of L7 is not necessary, and there is no need to input the number 1 dial from the keyboard.

The operation of the present invention when this operation is performed will be described with reference to FIG. 1 as in the case of linear input. PREQ 104 the coordinate values of the stylus pen 13 input via IN'100.
, DI ST 105. Displaying a handwritten figure on the CRT II via the DSP 109 is the same as the example of linear input. P-BQ104 calculates the strike vector during pen down, DIST is MEMOKY 1
08 (-Memorized and already input) The distance to the graphic data is calculated and the result is sent to TR and BQ107. T.R.
The EQ sends to the LOC 107 that the handwritten input figure was written close to the straight lines L5 to L7.

The C-EQ 108 determines a stroke from the coordinate values of the stylus pen 13 and performs character recognition. The character recognition technology itself is a publicly known example (Nikkei Collectronics 1988, 12°5
, pp115-1aa). Character recognition 1: When the character string R100 is obtained, the character string R100 is recognized from the character string as a radius hani, and the radius value is 10.
Send 0 to LOCIO6. LOC106 is 'L”l[Q
Straight line L6 sent from 107. L7 data and C
Radius value 100 sent from REQ104 and P
Since the graphic code sent from RgQ104 is a circle, a point E1 at a distance of 4100 from straight lines LO and L7, that is, the center point, is set. This result is sent to CRTII via D3P109 and straight line L6. Lq C bitangent radius 1
The yen 00 is corrected and sharpened. This coordinate value is MBM
Store in ORY108. The several types of input in this example are the radius of the circle, but other numbers such as the diameter of a circle or arc, the coordinate value in a rectangular or polar coordinate system, the length of a straight line, the distance from the reference line, etc. are also possible. It is.

Figure 3 (c) is an example of tangent input when the shapes that have already been input are close to each other, and there are other shapes that are close to each other, making it difficult to identify them, or when there is a risk of erroneous recognition. Perform the graphic operation in the same way as in the conventional device.First, move the stylus pen 13, hover the cursor on the circumference of circle C2, bring the pen down at point F, and then raise the pen again. The same thing is done for the circle C4.Next, start writing the handwritten figure from a position near the tangential coordinate of the circle C2, and finish writing at a position near the tangential coordinate of the circle C4. The command tangential is unnecessary.The operation of the present invention when this operation is performed will be described with reference to FIG. Input the coordinate values of the stylus pen 13, access the MHMO box Y108 in which the already input circles C1 to C4 and other figures are stored, calculate the distance between the point F and these figures, and calculate the distance between the point F and these figures. Send it to TRBQ 107. PICK 102 receives the pen down and pen up on and off signals from 80F!T 101 and inputs them from IN 100 to stylus pen 13.
It is determined that this is a big operation based on the amount of movement of the coordinate values, and this is sent to TR)3Q107. TI'LgQ 107 recognizes from these actions that circle C2 has been pinked. Furthermore, when the pen down and pen up operations are performed at point G, the same operation as above is performed. PRBQ starting from near the tangential coordinate of circle C2 and finishing near the tangential coordinate of circle C4
104, DIf9T 105, T EIQI
The operation of Q7 is almost the same as in the linear input example. The difference is that the big operation has already been performed, so DI8T105
First, the distance calculation for the circles C2 and C4 is performed, and the TRBQ 107 calculates the tangential coordinates of the circles C2 and C4. LOC106 determines that the figure code sent from PREQ 104 is a straight line, and that it is a straight line whose starting and ending points are the two coordinate values from the tangent coordinate values of circles C2 and C4 sent from T-EQ107. [Effects of the Invention] According to the graphic input device C2 according to the present invention, by recognizing online handwritten characters, a keyboard is not required, and by recognizing online handwritten input figures, it is possible to combine the handwritten figures with already input figures. Since this method calculates the proximity of objects, it has the effect of dramatically improving the input speed and operability of graphics compared to conventional devices.

[Brief explanation of drawings]

Figure 1 shows the details of the main body of the graphic input n& of the present invention (;
The displayed block diagram, FIG. 2 is a configuration diagram of a graphic input device according to the present invention in which a main body portion and an input device are combined, and FIG. 3 is a diagram showing an example of display of a graphic input to the graphic input device of the present invention.
Figure 4 shows graphic input (-) of a CAD system according to the prior art.
FIG. 6 is a flowchart of a graphic input operation using the apparatus shown in FIG. 4. 1... CAD system processing device, 2... C-T
13...Keyboard, 4...Tablet, 5...Block, 10...Graphic input device body, 11...CR
T, 12...Tablet, 13...Stylus pen, 14...Plotter, 100...Coordinate value input section, 1
01... Stroke end detection section, 102... Bic detection section, 108... Character recognition section, 104... Figure recognition section, 105... Proximity calculation section, 106... Coordinate value calculation section , 107...End point, contact calculation section, 108...Graphic memo! J, 109... Display control section, 110... Plotter control section. (7317) Agent Patent Attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2

Claims (2)

[Claims] (1) A means for reading first coordinate values of a figure on the tablet in a figure input device that inputs handwritten figures from a tablet; means for determining a shape close to the input shape by integrating distances to the coordinate values; means for determining the shape of the input shape from the first coordinate values; and means for determining the shape of the input shape from the determined proximity shape and the shape of the input shape. A graphic input device comprising means for determining second coordinate values of an input graphic, and means for storing the contents determined by the respective means in the memory and displaying the formatted graphic. . (2) In a figure input device that inputs handwritten figures etc. from a tablet, the first part of the figure on the tablet
means for reading the inputted figure information already stored in the memory and determining a figure that is close to the input figure based on the distance from the first coordinate value;
means for determining the shape of the input figure from the coordinate values of the input figure; means for determining the handwritten character from the first coordinate values when a handwritten character is input; and means for determining the shape of the input figure from the shape of the adjacent figure and the input figure; A graphic input device comprising means for determining coordinate values, and means for storing the contents determined by each of the means in the memory and displaying the formatted figures.