JPH077425B2 - Drawing input system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a graphic input system, and more specifically, it scans and inputs a drawing, and the scanned and input primary graphic data can be handled by a computer system such as a CAD system. The present invention relates to a semi-automatic drawing input system for converting into secondary graphic data.

[Conventional technology]

Conventionally, in a drawing input system that inputs drawing information using a scanning type input device and converts it into secondary graphic data that can be handled by a computer, based on preset parameters, the entire drawing or an area on a specified drawing is automatically Is automatically converted into secondary graphic data by a fully automatic method.
In such a system, the primary graphic data scanned and input can be collectively converted into secondary graphic data, but the following problems can be pointed out.

FIG. 6 is a diagram for explaining the problems of the conventional fully automatic drawing input method. 601 to 605 are display examples of primary graphic data corresponding to the input drawing, and 606 to 612 are the converted drawings. Two
It is a display example of the next figure data.

In the fully-automatic drawing input method, as shown in FIG. 6A, the secondary graphic data 606 converted from the primary graphic data 601 is generally approximated by a broken line, but the conversion target graphic cannot be specified. Parameters such as values are preset to constant values. Therefore, for example, as shown by the "x" mark, a quadrangle that you want to approximate with 4 points will be approximated with 5 points. May have different results than intended.

At present, since the figures that can be automatically identified are about isolated circles, it is difficult to automatically perform layering for each figure type required for drawing management, as shown in FIG. 6 (b). Usually, it is done by conversation as post-processing using the CAD function. FIG. 6B shows the primary graphic data 602.
This is an example in which is layered into 607, 608 and 609 as secondary figure data, but this is not possible with the conventional fully automatic figure input method.

Since the unnecessary figures included in the input drawing are also collectively converted, these unnecessary figures cannot be automatically removed as shown in FIG. 6 (c). It goes by conversation. FIG. 6 (c) shows an example of obtaining the secondary graphic data 610 by removing the unnecessary graphic 603 'contained in the primary graphic data 603, but this is not possible with the conventional fully automatic drawing input system.

Even for overlapping figures, it is difficult to automatically separate them as shown in FIG. 6 (d), and they are usually converted into linked secondary figure data. Therefore, the separation of these figures must also be performed as conversation processing. FIG. 6 (d) shows the figures 604 ', 60 of the primary figure data 604.
Secondary graphic data 611 by separating graphic 604 overlapping 4 "
However, this is not possible with the conventional fully automatic figure input method.

Since it is necessary to check whether or not the converted drawing as shown in FIG. 6 (e) has been converted into the desired shape while comparing it with the original drawing, it takes a considerable amount of time for confirmation work. There is.

[Problems to be solved by the invention]

As described above, in the conventional full-automatic drawing input method, the conversion processing is automatically performed at the time of drawing input, but in order to obtain the target secondary graphic data, it is considerably necessary to perform the correction work as the post-processing. It had the drawback of requiring manpower.

An object of the present invention is to solve the drawbacks of the conventional fully automatic drawing input system and to provide a semi-automatic drawing input system that does not require post-processing such as correction work.

[Means and Actions for Solving Problems]

The present invention is a drawing input system that scan-inputs a drawing and converts the scan-input graphic data (primary graphic data) into graphic data (secondary graphic data) that can be handled by a CAD system. Means for two-dimensionally displaying the graphic data, means for instructing a part of the displayed primary graphic data and a command to be processed by an operator,
Means for searching primary graphic data in the designated neighborhood,
It is characterized by having means for tracing or correcting the connection of the primary graphic data based on the command instructed from the searched point and converting it to the secondary graphic data.

In the present invention, like the conventional fully automatic drawing input system,
Rather than collectively processing the entire drawing or the specified area on the drawing, a person can instruct the necessary processing for each figure on the drawing, and the processing result can be immediately confirmed, so that the purpose 2 Post-processing such as correction work becomes unnecessary to obtain the next graphic data.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which 101 is a drawing input unit including a scanner, a facsimile, and the like.
102 is a graphic display unit including a graphic display, 103 is a graphic indicating unit including a tablet, 104 is a primary graphic data storage unit, 105 is a secondary graphic data storage unit, and 106 is data input / output processing. A control unit for controlling the procedure, etc., 107 to 112 are processors for performing processing relating to each figure, 107 is a point search processor, 108 is a straight line tracking processor, 109 is a broken line tracking processor, 110 is a curve tracking processor, and 111 is Rectangular tracking processor, 112 is a circle tracking processor. In addition, in FIG. 1, various processors can be added according to various figures to be extracted.

First, the binarized drawing data input from the drawing input unit 101 composed of a scanning type graphic input device such as a scanner such as a facsimile is temporarily stored as primary graphic data in the primary graphic data storage unit 104 through the control unit 106. To be done. Next, the whole or a part of the primary graphic data is sent to the graphic display unit 102 through the control unit 106 and displayed.

The operator sees the whole or a part of the drawing constituted by the displayed primary graphic data, while looking at the processor 10
An instruction corresponding to the contents processed by 7 to 112 is given to the figure on the display surface through the figure designating unit 103. The commands include, for example, point generation, line segment generation, arc generation, straight line tracking, broken line tracking, and curve tracking.

The control unit 106 selects each of the processors 107 to 112 based on the instruction sent from the graphic designating unit 103, and causes the processing to be executed. In the normal processing, the search processor 107 searches for primary graphic data existing in the vicinity based on the input point on the drawing sent together with the command, and when the primary graphic data is found, each of 108 to 112 is searched. Ask the tracking processor for processing. In each tracking processor 108-112, the search processor 10
1 based on the points on the primary figure data sent from 7
The tracking processing of the next graphic data is performed, and the secondary graphic data is generated according to the function of each tracking processor.

FIG. 2 shows an example of the processing procedure of the system of the present invention when a straight line is generated. In FIG. 2, 201 is a scan input 1
Representing the next figure data, 202 is a search area for searching the primary figure data in the vicinity of the input point, 203 is point data indicating the tracking start point, and 204 is the secondary figure data after tracking.

The scan-input primary graphic data 201 is displayed on the graphic display unit 102. First, when a straight line tracing command and an input point are designated by the graphic designating unit 103, as shown in FIG. 2A by the point search processor 107, a primary graphic in a predetermined search area 202 near the input point. The data 201 is searched.
When the primary graphic data in the search area 202 is found, the second
As shown in FIG. 6B, the line tracking processor 108 performs tracking based on the point data 203. At this time, what is important is that even if there is primary figure data that intersects in the middle, if it is possible to trace in the extension direction of the straight line,
It is to continue the straight line tracking in the extension direction. Also,
The operator may be inquired as to whether or not to end the tracking at the intersection. FIG. 2 (b) shows an example of continuous straight line tracking. By doing this, even if it overlaps with another figure,
It can be extracted as a group. Continue tracking,
The right end of the T-shape, which cannot trace a straight line beyond that, is defined as one end point. Then, by the same procedure, tracking is performed in the opposite direction (leftward in the figure) to find the other (leftmost) endpoint. The secondary figure data obtained by tracing this straight line is expressed by the two-dimensional coordinate values of both end points.
In straight line tracking, even if there is some deviation from the original figure, no intermediate point is generated.

FIG. 2C shows a case where the generated secondary graphic data 204 is displayed by being superimposed on the primary graphic data 201. In this way, after the secondary graphic data is generated, by immediately superimposing it on the primary graphic data being displayed on the graphic display unit 102, the operator can immediately confirm the result.

Although FIG. 2 shows an example of generating a straight line, the same applies to the case of generating other secondary graphic data, and the operator inputs the type of graphic to be generated and the proximity point of the graphic from the graphic designating unit 103. By doing so, various figures can be converted into secondary figure data with a predetermined accuracy.

FIGS. 3, 4, and 5 show a point search processor 107, a line tracking processor 108, and a curve tracking processor, respectively.
An example of each processing flowchart of 110 is shown. Since these processes themselves are well known, detailed description will be omitted. The same applies to other processors.

When the straight line described in FIG. 2 is generated as the secondary graphic data, the point search processor 107 first performs the process in FIG. 3, and then the straight line tracking processor 108 performs the process in FIG. Further, in the case of generating a curve, the point search processor 107 may perform the processing of FIG. 4 and then the curve tracking processor 110 may perform the processing of FIG.

〔The invention's effect〕

As described above, according to the figure input system of the present invention, with some operator intervention, secondary figure data can be efficiently generated in a form that meets the original request.

That is, among the problems of the fully-automatic figure input method described in FIG. 6, (1) generation of unnecessary points can be suppressed by selecting a process suitable for the figure to be converted, and (2) stratification , It is only necessary to specify the layer after conversion before performing the graphic conversion, and (3) unnecessary graphics do not occur because conversion is not originally performed, and (4) regarding separation of overlapping graphics, The conversion process can be automatically performed at the selected time. In addition, the complicated creation of confirmation with the original drawing was also converted into 2 on the primary graphic data displayed in the graphic display area.
The next figure data can be immediately displayed by, for example, changing the color and superimposing it, and if necessary, it can be corrected by applying normal CAD processing at that time.

In addition to the conversion processing function of this system,
If the CAD function is also incorporated, figures that are not on the input drawing can be added immediately in the form of secondary figure data, and further improvement in performance can be expected.

This system is effective as a mechanized input means for managing and managing disused drawing information in a computer, and as an application field, mapping field that manages various information based on city planning maps, topographic maps, etc. , The field of design that handles design diagrams such as circuit diagrams, mechanical diagrams, and platonic diagrams.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the drawing input system of the present invention, FIG. 2 is a diagram showing a processing example for explaining the processing procedure of the present invention system, and FIG. 3 is a point search processor in FIG. 4 is a diagram showing an example of the process flow of the straight line tracking processor in FIG. 1, FIG. 5 is a diagram showing an example of the process flow of the curve tracking processor in FIG. 1, and FIG. It is a figure explaining the problem of the conventional fully automatic drawing input system. 101 ... drawing input section, 102 ... figure display section, 103 ... figure display section, 104 ... primary figure data storage section, 105 ... secondary figure data storage section, 106 ... control section, 107 ... Point search processor, 108 ... Straight line tracking processor, 109 ... Broken line tracking processor, 110 ... Curve tracking processor, 111 ... Rectangular tracking processor, 112 ... Circle tracking processor.

Claims (1)

[Claims] 1. A drawing input which scan-inputs a drawing and converts the scanned-in graphic data (hereinafter referred to as primary graphic data) into graphic data (hereinafter referred to as secondary graphic data) that can be handled by a CAD system. Scan input 1 in the system
Means for displaying the next graphic data in a two-dimensional manner, means for instructing a part of the displayed primary graphic data and a command to be processed by an operator, and searching for the primary graphic data in the vicinity of the instructed A drawing input system comprising: means and means for tracking or correcting the connection of the primary graphic data based on the command instructed from the searched point and converting the data into secondary graphic data.