JPS62160581A - Graphic input device - Google Patents

Abstract

PURPOSE:To enable the information for a drawing to be inputted to a computer automatically, and to obtain the information for the drawing with requested approximate accuracy by performing a graphic process inputting the information for a graphic to the computer, and generating the code information with accuracy. CONSTITUTION:When the drawing is inputted with a picture input means 1, the binary information is generated, and is stored t the first storage means 2. Since the picture information has the thickness of line, the sequence of points information of the coordinate of a sequence of points at the center of the line is generated at the sequence of points making part 3, and is stored at the second storage means 4. next, at an encoding means 5, an encoding for the sequence of points information is performed with a straight line or a circular arc, etc., then the code information being generated, then it is stored at the third storage means 6. lastly, at an encoding means 7 with accuracy, a feature quantity for each code is found from the code information, and based on the feature quantity, the accuracy information for each boundary point in the code information is calculated, and the code information with accuracy can be generated by adding the above on the code information, then being stored at the fourth storage means 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a graphic input device for inputting drawings and detailed information into a total of JX1 numbers.

[Conventional technology]

FIG. 8 is a schematic configuration diagram showing a conventional graphic input device using a digitizer. In the figure, 9 indicates the drawing I! <Board, ] 0 is the target drawing, 11 is a cursor for inputting information in the position, and 12 is a switch.

A conventional digitizer configured as above (])ig
For example, in order to input the graphic information of drawing 10, it is necessary to input the graphic information of drawing 10 manually.
is pasted on the board 9, the point to be input is specified with the zero mark of the cursor 11, and its coordinates are input using the manual operation switch 12.

To input information about a straight line, use the cursor 11 to input the coordinates of two points at both ends. To input information about an arc, input the coordinates of two points at both ends and one point between them. The software calculates each code information such as a straight line and two circular arcs, and inputs the information in the drawing 1o.

[Problem that the invention seeks to solve]

With conventional graphic input devices such as those mentioned above, drawing information is input manually by one person, so it takes time to input drawing information and input errors occur due to individual differences among the users. There were several problems.

This invention was made to solve this problem, and it is possible to input drawing information into a computer at will, and it is also possible to input information on approximation accuracy at multiple stages at the same time. The purpose of this invention is to obtain a graphic input device that can perform the following functions.

[Failure to solve the problem]

The graphic input device according to the present invention includes an image input means for reading a drawing and creating binary image information, a GL storage means for storing the image information, and a graphics input device for processing the image information to create point sequence information. Serialization means and second memory 1 for storing point sequence information
．． means, a coding means for processing the point sequence information to create code information such as a straight line and 9 circular arcs, a third notation means for storing the code information, and a third notation means for processing the code information and generating the code. The apparatus is provided with precision coding means for creating precision code information by adding information on a plurality of levels of approximation precision to information, and fourth storage means for storing precision code information.

[Effect]

In the graphic input device of the present invention, information on one drawing is automatically input into a computer, and an image is generated by the computer.

Graphical processing is performed, information on approximation accuracy at multiple stages is input simultaneously, and after input, coding is performed so that the information on approximation accuracy can be selected.

〔Example〕

FIG. 1 shows a block groove structure showing a graphic input device which is an embodiment of the present invention. In the figure, 1 is an image input means that reads the drawing and creates binary image information, 2 is 11
ilii1. ? ! A first storage means that stores the image information created by the input means 1, and a point sequence 3 that receives the image information stored by the first storage means 2 and creates point sequence information of the center line of the spelling. 4 is a second memory means for storing the point sequence information created by the point sequence generation means 3, and 5 is a second memory 1. a Encoding means which inputs the point sequence information stored by the means 4 and creates code information such as straight line 9 circular arcs for the point sequence of the line; 6 stores the code information created by the encoding means 5; A third storage means, 7, a precision encoding means for creating code information with precision by adding information on a plurality of stages of approximation precision to the code information stored in the storage means 6 of @3; 8, a precision coding means; This is a fourth storage means for storing the code information with accuracy created by the encoding means 7.

FIG. 2 and FIG. 3 are diagrams for explaining the uhi image information and point sequence information in the graphic input device of FIG. 1, respectively;
4 and 5 are diagrams for explaining the encoding means in the graphic input device of FIG. 1, respectively, and FIG. 6 is a diagram for explaining the precision encoding means in the graphic input device of FIG. 1. Diagram of no use.

FIG. 7 is a diagram showing an example of the output of precision code information by the precision coding means in the graphic input device of FIG.

Next, the operation of the graphic input device shown in FIG. 1, which is an embodiment of the present invention, will be explained with reference to FIGS. 2 to 7. First, when a drawing is input using the image input means 1, binary image information as shown in FIG. 2 is created and stored in the first storage means 2. This image information has the thickness of the line, so in the 1-point array manual method 3, the center of the line is taken, and the 5 points of the series of points at the center of the line as shown in Figure 3 are
Point sequence information is created and recorded in the second recording means 4. Using this point sequence information as input, the encoding means 5 encodes it using straight lines, nine circular arcs, etc. to create code information.

Next, the above code ti? Explain how to create information.

As shown in Figure 4, for a certain point Pa in the series of points, calculate the perpendicular distance d from a straight line passing through points Pb and 1 point Pc that are n points apart before and after the point Pa, and calculate this perpendicular distance d between all points in the series. For example, when itching occurs, the vertical pressure flu as shown in ff 5 d
A waveform of d is obtained. Is there a flat part P2 to PS within this waveform where the vertical distance d is greater than or equal to a certain value? Vertex P4 is detected, and P+~P is a straight line +P2~P.

Creates code information in which arcs eP3 to P and P4 to P5 are straight lines. The code information created in this way is recorded in the third storage means 6.

Next, the precision coding means 7 inputs the code information, and first, as shown in FIG. For arc codes, the radius γ of the arc
and the central angle ψ, and for the boundary points between each code, the angle θ between the tangents is found.・In particular, for the i-th boundary point in the code information, the accuracy evaluation function F=f
(..., βto1.αto1.βi, αi, βi+
1. ...) to calculate accuracy information. Here, as the accuracy evaluation function F, for example, is used. However, 1m is a constant, βi means the feature amount at the i-th boundary point, in this example it is θ, and αi is the i-th boundary point.
It means the feature amount of the code, and in this example, when it is a straight line, it is γ and when it is an E2 arc, it is ψ. This accuracy information @ is calculated for each boundary point and added to the code information to create code information with accuracy. The code 1* with precision created in this way is as follows.

It is stored in the fourth storage means 8.

FIG. 7 shows an example of the output of the above precision code information. 71 (al) is a graphic representation of code information without accuracy information, and Figure 7 (b) is a graphic representation of code information with precision whose accuracy evaluation function F is greater than a certain constant T+. What is expressed, Figure 7 (C)
is a graphical representation of code information with precision in which the value of aF between precision evaluations is larger than a certain constant T2. However, the constant T, < T. After doing this manually, the desired approximation accuracy can be set by the value of the accuracy evaluation function F, so even if several different types of approximation accuracy are required, there is no need to input it multiple times depending on the approximation accuracy. .

As described above, according to the present invention, information on one drawing can be automatically input into a computer, and information on approximation accuracy at multiple stages in the drawing can be input simultaneously.

[Effects of the Invention] As explained above, the present invention uses a graphic input device to automatically input drawing information to a computer, perform image 2 graphic processing by the computer, and furthermore, input information on approximation accuracy at multiple stages. The configuration is such that information is input simultaneously and then coded so that information on approximation accuracy can be selected after input, making it possible to automatically input drawing information into the computer, and also allowing multiple levels of approximation accuracy to be input. By having both information, it is possible to obtain the drawing information with the desired approximation accuracy after inputting it, which brings about excellent effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a graphic input device which is an embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining image information and point sequence information in the graphic input device of FIG. 1, respectively. Figures 4 and 5 are I of Figure 1, respectively.
FIG. 6 is a diagram for explaining the encoding means in the A-type human power device, FIG. 6 is a diagram for explaining the precision encoding means in the graphic input device of FIG. 1, and FIG. FIG. 8 is a diagram illustrating an example of the output of precision code information by precision coding means in an input device. FIG. 8 is a schematic configuration diagram showing a conventional graphic input device using a digitizer. In the figure, 1... image input means, 2... first storage means, 3... dot string formation means, 4... second storage means. 5... Encoding means, 6...-A3 storage means, 7
. . . Precision encoding means, 8 . . . Fourth note 1. i
! Means, 9... Board, 10... Drawing, 11... Cursor, 12... Switch, Pa, Pb, Po...
P, -P, -...point, L...direction ILd...perpendicular distance, l...length of lα line, γ...radius of circular arc. ψ...The central angle of the circular arc, θ...The angle formed by j concubine 1V1. In addition, in each figure, the same number 1 indicates the same or I target part. Figure 1 21! l Figure 3: 8 Figure 9: Wolf 10: Figure 11: Kurtz) 12:

Claims (1)

[Claims] In a graphic input device that inputs drawing information into a computer,
An image input means for reading a drawing and creating binary image information, a first storage means for storing the image information created by the image input means, and image information stored by the first storage means. is input, and a point sequence forming means creates point sequence information of the center line of the line, a second storage means stores the point sequence information created by this point sequence forming means, and this second storage means Coding means that receives stored point sequence information as input and creates code information such as a straight line, circular arc, etc. for the line point sequence, and a third storage means that stores the code information created by this encoding means. and a precision encoding means for creating precision code information by adding information on a plurality of stages of approximation accuracy to the code information stored by the third storage means; and fourth storage means for storing code information with accuracy.