JPS6249574A - Graphic input system - Google Patents

Abstract

PURPOSE:To attain the input of graphic data to various types of graphic processing means by converting the input graphic data into linear vector data on a CRT screen. CONSTITUTION:Run length data is produced based on the graphic data delivered from a graphic output means 1 such as a FAX, etc. Then the graphic data is displayed on a CRT 8. A pointing means 9 like a mouse, etc. extracts vectors to convert the graphic data into the linear vector data after designating both start and end points and also deciding a straight line or a circular arc for the segments of a pattern displayed on the CRT 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a graphic input method that converts graphic data output from a facsimile or the like into vector data, and inputs and processes this as graphic input data. [Prior Art] FIG. 4 is a block connection diagram showing a graphic input device for implementing a conventional graphic input method. In the figure, 1 is a facsimile (hereinafter referred to as FAX) as a graphic output means for outputting graphic data on a drawing; 2 is a graphic input device configured as a microcomputer; 3 is an image memory for storing the graphic data output by the FAX 1; and 4 is a random access memory according to a processing program stored in a read-only memory (hereinafter referred to as ROM) 5. A central processing unit (hereinafter referred to as CPU) that processes graphic data stored in memory (hereinafter referred to as RAM) 6 % 7 is a keyboard that starts execution of various programs and inputs various data, 8 is a CRT .

Next, regarding the operation, see the flowchart in Figure @5 and the flowchart in Figure 6.
This will be explained while looking at the graphical data in the figure.

First, when the original picture shown in Fig. 6a is input to the FAX 1 (step ■), the FAX 1 breaks down the figure into horizontal X dots and vertical Y dots according to each resolution, reads them, and converts each pixel into a black and white signal. The converted data is sent to Ryotsu memory 3. At this time, one bit of one image memory 3 corresponds to one pixel, and the black and white signals of each pixel correspond to lot and Ill, respectively. Therefore, the image memory has (XxY) bit data as image data.

Next, the CPU 4 processes raster data from raster 0 to Y based on the above graphic data according to the processing program stored in the ROM 5.
Create run-length data for each raster in 1 and store it in RAM 6 (step ■).At this point, this run-length data has been converted into the figure @6, which has only black pixel information. However, the line in the run length data has a width of several dots due to the resolution (dot/dot) of FAX 1.

Next, use the line data that has a width of several dots, and
Figure C is created as a collection of five points, that is, serially connected pixels, as shown in Figure C. Next, calculations are performed to determine whether adjacent points are on the same straight line or on concentric circles, and the sequence of points is recognized as points on the same straight line or concentric circles. If so, identify the figure t?3 using the equation of the straight line or arc that indicates the end point and point sequence of those point sequences (step ①).
). When the above process is repeated for all points, the result is approximated and simplified to vector data representing several end points and straight lines or arcs between the end points as shown in Figure 6 (d). However, because a line that originally had a width of several dots is approximated as a series of dots, what was once a single straight line may be mistakenly recognized as a broken line made up of several straight lines. The 12 points g at d in FIG. 6 are due to erroneous recognition caused by converting a part of the circular arc into a series of points as a straight line. Therefore, by using the keyboard T and CBr4 of the drawing input device 2 and interacting with the CPU 4, the erroneously recognized portions are corrected and recognition data as shown in FIG. 6e is obtained (step 2).

By performing the above processing, the shape of the figure can be recognized. Furthermore, when one figure data is used for machining processing by a machine tool, etc., it is necessary to give the actual size dimensions to one figure as shown in Figure 6f, and the dimensions must be entered through interactive processing with the CPU. Drawing data in the required form is created so that it can be used for each machine tool, etc. (Step ■).

[Problem that the invention seeks to solve]

The conventional graphic input method is as described above.

In addition to the fact that the figure recognition process takes too much time, it also requires a correction process for erroneous recognition, complicating the work of the 11 correct process. Also.

It is also possible to input graphic data using a digitizer instead of FAX 1. In this case, it is necessary to operate both the digitizer and CBr4 to check the input, which reduces the efficiency of input work. There were problems such as a decline in

This invention was made to solve the above-mentioned problems, and it converts graphic data input on a CRT screen into line vector data by a simple input operation using a pointing means such as a mouse, and converts the graphic data into line vector data. The object of the present invention is to obtain a graphic input method that can be input to various graphic processing means as graphic input data.

[Means for solving problems]

The graphic input method according to the present invention creates run-length data based on graphic data output by a graphic output means such as a FAX, displays this data on the 'tcRT screen, and displays the end points and lines of the displayed graphic line segments. By specifying the type using the pointing means, the above figure data 1&:c is converted into line vector data on the RT screen, and this line vector data is input to various figure processing means as figure input data. be.

[Effect]

The pointing means in this invention extracts a vector by specifying the starting point and end point of a line segment of a figure displayed on a CRT screen and specifying whether the line is a straight line or an arc, thereby converting the figure data into a line vector. Make it convertible to data.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a graphic output means such as a FAX or digitizer, and 9 is a mouse as a pointing means connected to the CPU 4 of the graphic input device 2. This is input key 9a of straight line vector A.

Input key 9b for arc vector B and cancel/end key 9 for instructing cancellation of the input vector or termination of processing
Has ce. Note that other components that are the same as those shown in FIG. 4 are designated by the same reference numerals, and redundant explanation thereof will be omitted.

Next, regarding the operation, the flowchart in Figure 2 and the flowchart in Figure 3.
This will be explained while looking at the graphical data in the figure.

First, the binary graphic data as shown in FIG.
(step ◎), and raster vector run length data is created for each raster from raster O to raster Yl as in the conventional case (step □0). As shown in Figure 3, this run-length data is almost the same as the figure data of the original drawing, so by displaying the run-length, the image of the figure output by the FAX1 is displayed on the screen of the CRT 8 as is (step ■) 0 Next, point Kern/L indicating the mouse position on CRTa
Specify the position and type of the vector by / (for example, ten points). The position of the mouse indicates the starting point of the vector, and the mouse keys 9a and 9b indicate the type of line of the vector. Figure 3C shows the actual mouse input method, and the black circles and white circles in P1 to P6 indicate the mouse input position and order.The black circle is key 9a, and the white circle is key 9.
Indicates that the input is by b.

First, the starting point Pl of the vector to be specified first among the vectors forming line vectors on the run length data shown in FIG. 3 displayed on the CRT is inputted using the mouse. At this time, if the vector is a straight line, key 9a' (I-
Press to input. next.

Input the starting point P2 of the second vector using the mouse. Since this vector is a circular arc, press key 9b to input it. At this time, the end points of the first vector have been input at the same time, and a straight line vector connecting one point P1 and point P2 has been input.

Next, press point P5, which is the starting point of the third vector, using key 9.
Enter with a. However, since the second vector is a circular arc, the circular arc cannot be determined only by the start and end points. Therefore, in the case of a 1-arc vector, after inputting the end point, that is, the starting point of the next vector, enter another point P4 on the 2-arc vector using the key 9.
Enter with b.

With this input, point p2. This means that the arc vector passing through p, ,p has been input. Next, by inputting the starting point P of the fourth vector, inputting of the third straight line vector is completed. If the third vector is also an arc, input the point P with the key 9b, input the second point P, and then add + to the other point on the arc vector.
The process is similar to inputting with -9b. Thereafter, all the line vectors constituting one figure are input by executing the same process (step 2).

Next, create a vector from the start point, end point, and S type of the figure input in step ① and display it in a different color or on a different screen than the run-length data, so that the input vector is combined with the run-length data. and can be checked at the same time.

Here, if you make a mistake in the above input, move the point car to the input position and press the 9ct- key to input the position. Compare this input position with the position data of the start point and end point of the vector input so far, and if it exists within a certain error range, cancel that point and enter a new position and vector with the primary input. Let it be a monkey. When inputting up to point P6 and inputting the fifth or final vector, the starting point of the first vector, or point P1, is inputted as the end point. In any case, if the previous input is within a certain error range of the input point, the input value is considered equal to the previous input value. After performing the above processing and inputting the last vector, if there is no input so far, move the point cursor and input from the key 9c twice in succession. By this process, as shown in Figure 3 d, vector creation is completed (Step ■) 0 or less, as shown in Figure 3 e, the correct dimension value is input (Step ■) 1 By performing drawing data creation processing (step), machining data for machine tools can be created.

In addition, in the above embodiment, 7 tasks were used as the input device, but C
A similar effect can be obtained by using other input devices that can point to coordinates on the RT screen.

Furthermore, in the above embodiment, the case of a clean drawing was explained, but even in a freehand drawing, the shape can be approximated to straight lines and circular arc vectors, so it is possible to create accurate geometric data by performing dimensioning manually. , the same effect as the above embodiment is achieved.

Furthermore, we used a multi-screen method to separate screens for the original graphic data and vector data.

By combining these screens as necessary, it is possible to easily check line segment input.0 [Effects of the Invention] As described above, according to the present invention, raster vector runs can be performed based on graphic data. Create run length data, display this run length data on the tcRT screen, and
The graphic data can be converted into vector data on the CRT screen by a simple operation of specifying the end point of a graphic line segment on the T screen, the type of line, etc. using a pointing means. Therefore, it is possible to check and correct mistakes in inputting line segments with simple operations. Furthermore, out of several shapes drawn in one drawing, only the necessary ones can be taken out, and unnecessary processing work can be omitted.

[Brief explanation of drawings]

FIG. 1 is a block connection diagram showing a graphic input device for executing a graphic input method according to an embodiment of the present invention, FIG. 2 is a flowchart showing the graphic input execution process, and FIG. 3 is a diagram showing the graphic processing state. FIG. 4 is a block connection diagram showing a conventional graphic input device, FIG. 5 is a flowchart showing a graphic input execution process, and FIG. 6 is a graphic explanatory diagram explaining a graphic processing state. be. 1 is a graphic output means, 2 is a graphic input device, and 8 is a CRT. In Figure 1, the same reference numerals indicate the same or equivalent parts. Patent applicant Mitsubishi Electric Corporation - F Agent Patent attorney 1) Hiroshi Sawa (2 others) Figure 6 7 Procedural amendment (voluntary)

Claims (1)

[Claims] In a graphic input method that recognizes graphic data on a drawing input from a graphic output means, converts it into vector data, and inputs and processes this vector data as graphic input data.
By creating raster vector run length data based on the above figure data, displaying this run length data on a CRT screen, and specifying the end point of the figure line segment and the type of line on this CRT screen by pointing means. A graphic input method characterized in that the graphic data is converted into vector data on the CRT screen.