JPH01309180A - Graphic input data editing 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] [Summary] The present invention relates to a drawing input device that converts raster data into vector data and performs correction/editing, and an object of the present invention is to efficiently erase unnecessary image areas when making corrections after inputting a drawing. For the purpose of this, when making the correction, the area on the screen containing the unnecessary image is surrounded by a closed curve using a means such as a light pen, the closed curve is detected, and the internal area is erased as raster data. I am the one who will make the corrections.

[Industrial application field]

The present invention relates to a drawing input device that converts raster data into vector data and performs correction and editing.

[Conventional technology]

Traditionally, with the spread of CAD and computer mapping,
Improving the efficiency of drawing editing work has become a major issue.

The drawing input device first inputs the drawing using a scanner,
The read surface inspection information is binarized and converted into raster data.

Next, convert the raster data to vector data.

This is because CAD systems and computer mapping systems handle figures as vector data.

Finally, the vectorized data is converted into a format suitable for the user's CAD system or computer mapping system, and then passed to these systems. The target drawing is a map.

There are 9 wiring diagrams, 9 architectural diagrams, 9 mechanical blueprints, and clothing patterns.

FIG. 3(α) is a configuration diagram of the above-mentioned main parts. That is,
The drawing 1 is stored in the image buffer 4 as raster data through a scanner, and its contents are displayed on the CBr 4 via the display memory 71, and the raster data is converted into vector data and stored in the graphic buffer 6.

This content is displayed redundantly on the CBr4 via the display memory 7z, and the modified vector data is outputted through modification 9 editing.

At this correct time, dust, stains, or unnecessary images attached to the drawing 1 are erased. In this case, the display memo displayed on CBr4! J 71t 7z or the duplicated display, use a manual movement instruction means such as a light pen 30 to move the unnecessary image 10, and as shown in the erasing procedure in FIG. The unnecessary image is erased based on the address, and the result is returned to the image buffer 4.

[Problem that the invention seeks to solve]

The above erasing procedure may take a very long time and may only be able to erase incompletely if the shape of dust or smudges or unnecessary images is complex. Therefore, there is a drawback that it takes too much time to modify the figure.

The present inventor has focused on the fact that even if unnecessary figures are complex, efficiency can be increased by erasing them as areas.

An object of the present invention is to efficiently erase unnecessary image areas when making corrections after inputting a drawing.

[Means for solving problems]

In order to achieve the above object, the present invention converts raster data into vector data and corrects it.

In the drawing input device for editing, when making the correction, the area containing the unnecessary image on the screen is surrounded by a closed curve using a means such as a light pen, the closed curve is detected, and the internal area is erased as raster data. This will be corrected as follows.

[For production]

Figures 1 (α) and (6) are explanatory diagrams of the principle of the present invention.
Instead of directly detecting the position with a light pen, etc., surround it with a closed curve 20, and this closed curve can be used as a display memo')71+
Since it can be detected by overlapping 7□, it can be erased by changing all the pixels in this internal area to raster data. By returning this to the image buffer 4, the corrected drawing is sent to the graphic buffer 6 as vector data. FIG. 6(6) shows the erasing procedure of the present invention. That is, the closed curve drawn with the light pen is displayed 0, the closed curve address is detected 0, and unnecessary images within the closed curve are erased 0, and the results are returned to the image buffer 4.

〔Example〕

FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention.

In the figure, a drawing 1 is scanned by a scanner 3 in a drawing input device 2.
A predetermined threshold value is set, the signal is converted into a digital signal, and this is placed in the image buffer 4 and stored as raster data. This raster data is developed in the display memory 71 and displayed on the CBr4. On the other hand, the raster data of the contents of the image buffer 4 is stored as vector data in the graphic buffer 6 via the vectorizer 5. This vector data is developed in the display memory 72 and displayed overlappingly on CBr4. When looking at the screen of the CBr4, if there is an unnecessary image 10 due to dust etc., draw a closed curve 20 with the light pen 60, and as shown in FIG. All internal pixels are raster data. This content is returned from the display memory 71 to the image buffer 4, converted to the figure buffer 6, the display memories 71 and 72 are checked for duplicate display, the corrected vector data is stored as a file on the disk 9, and the data is stored in the CAD system or computer. - Prepare for input into the mapping system.

In the embodiment described above, a light pen is used as a means for instructing continuous movement of an area including an unnecessary image, but a mouse, tablet, keyboard mark, etc. having a similar function may also be used.

〔Effect of the invention〕

As explained above, according to the present invention, the complicated procedure of detecting the address of complicated dust, stains, and unnecessary images for each pixel and erasing them in response to them is omitted, and the same parts are erased all at once using a closed curve. By adopting this method, correction work can be easily performed and work time can be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the present invention, Fig. 2 is an explanatory diagram of the configuration of an embodiment of the present invention, and Fig. 3 is an explanatory diagram of a conventional example.
is a drawing, 2 is a drawing input device, 3 is a scanner, 4 is an image buffer, 5 is a vectorization unit, 6 is a figure buffer, 7
1*7m is display memory, 8 is CRT, 9 is disk, 1
0 indicates dust, etc., and 20 indicates a closed curve.

Claims (1)

[Scope of Claims] Using a scanner, drawing data is read as raster data and developed in a first display memory, and the raster data is automatically converted into vector data and developed in a second display memory, and the raster data is automatically converted into vector data and developed in a second display memory. , a drawing input device that outputs corrected vector data after correction and editing by displaying only one side of the second display memory or in duplicate; 1. A drawing input data editing method, comprising: enclosing a closed curve using a means for instructing movement, detecting the closed curve, and erasing the internal area as raster data to perform corrections.