JPH05205027A - Digitizer displaying image in reading range - Google Patents

Abstract

PURPOSE:To obtain the data having a small error and the high accuracy by sticking a drawing or a command menu within a reading range of a digitizer and turning the hit drawing or menu into the image date to show this date on a display. CONSTITUTION:An image input device 3 is provided together with a host computer which processes the image data inputted from the device 3, and a digitizer 2 which contains 8 display device 7 that is used as a pointing device of the computer 1 and shows the data in the reading range of the image data. Then the computer 1 is connected to the digitizer 2 via a serial circuit, and the image data is inputted by the device 3 and transferred to the computer 1. The computer 1 performs the vector/raster conversion processing of the image data and shows this processed data on the device 7 in the reading range of the digitizer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer aided design (hereinafter referred to as CAD) system, and more particularly to a digitizer used as a pointing device.

[0002]

2. Description of the Related Art Conventionally, when a digitizer is used as a pointing device in a computer CAD system, two devices, a host computer and a digitizer, are connected by a serial line.

Here, the designer who is the operator of the CAD system attaches a drawing for tracing or a command menu used in the CAD system within the reading range of the digitizer according to the purpose of business. This command menu exists in the form of plain paper.

Then, in operation, the designer performs a hit (trace) within the reading range of the digitizer. The digitizer side reads the coordinate value of the cursor or stylus pen by the absolute coordinate electromagnetic induction method. The read coordinate values are sent to the post computer at a transfer rate designated by a format defined by the host computer (for example, ASCII format or Binary format). On the host computer side, the application program analyzes the coordinate values to perform the CAD system command selection processing or drawing trace processing targeted by the designer.

[0005]

In the above-described operation of connecting the digitizer and the host computer, the accuracy of reading the coordinate value of the cursor or the stylus pen or the coordinate value of the traced character by the absolute coordinate electromagnetic induction method is high, but it is a human being. There is a drawback that a large error occurs due to paper misalignment or the like that occurs after pasting drawings or command menus within the reading range of the digitizer, which is a system work.

An object of the present invention is to attach a drawing or a command menu within the reading range of a conventional digitizer,
By converting what was hit into image data and displaying it on the display, the above drawbacks are resolved,
An object of the present invention is to provide a digitizer that displays an image in a reading range where a highly accurate data with a small error can be obtained.

[0007]

DISCLOSURE OF THE INVENTION A digitizer for displaying an image in a reading range of the present invention includes an image input device for inputting image data, a host computer for processing image data input from the image input device, and a host computer. It has a digitizer equipped with a display device for displaying an image within the reading range of the image data, which is used as a pointing device of the computer, and the host computer and the digitizer are connected by a serial line, and the image input device inputs the image data. Then, the image data is transferred to the host computer, the host computer performs the vector-to-raster conversion process, and the converted image data is displayed on the display device within the reading range of the digitizer.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of a system using a digitizer for displaying an image in a reading range according to an embodiment of the present invention, and FIG. 2 is data of a system using a digitizer for displaying an image in a reading range according to this embodiment. It is a flowchart showing the flow of.

In FIG. 1, a system using a digitizer for displaying an image in the reading range of this embodiment comprises a host computer 1, a digitizer 2 and
Image input device 3 and RS-232C cable a4
, Video cable 5, RS-232C cable b6
And a display device 7 within the digitizer reading range.

Next, the operation of the digitizer for displaying an image in the reading range of this embodiment will be described with reference to the drawings.

In FIG. 1 and FIG. 2, a designer who is an operator of the CAD system has a drawing (a machine assembly drawing or a site survey drawing) or a CAD system for performing a hit or a trace. First, the command menu used in step 1 is input from the image input device 3 of FIG. 1 (step 11). Here, the designer individually inputs the quantity required for his / her work (step 12, Ye).
s). If the input of the command menu is not completed (step 12, No), the command menu is input until it is completed. Then, the input data is R in FIG.
The vector program is converted to raster data in the application program on the host computer 1 side through the S-232C cable a4 (step 1
3).

Next, the imaged drawing or the data of the command menu is transferred to the digitizer 2 side through the video cable 5 of FIG. 1 at the timing requested by the designer, and to the display device 7 within the reading range. It is displayed (step 14).

The designer hits or traces the drawing or command menu displayed on the digitizer read range display device 7. The digitizer 2 side reads the coordinate value hit by the cursor or the stylus pen by the absolute coordinate electromagnetic induction method. next,
The read coordinate values are in the format specified by the host computer (for example, ASCII format or B
In the inary format), the data is transferred to the host computer 1 through the RS-232C cable b6 of FIG. On the host computer 1 side, the data transferred by the application program is analyzed and the designer selects a command for CAD system command or drawing trace processing.

[0015]

As described above, the digitizer for displaying an image in the reading range of the present invention puts a drawing or a command menu in the reading range of the conventional digitizer and converts the hit to image data. By displaying on the display, there is an effect that it is possible to obtain highly accurate data with a small error.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a system using a digitizer that displays an image in a reading range according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a data flow of a system using a digitizer for displaying an image in a reading range of the present embodiment.

[Explanation of symbols]

 1 Host Computer 2 Digitizer 3 Image Input Device 4 RS-232C Cable a 5 Video Cable 6 RS-232C Cable b 7 Digitizer Display Device within Reading Range

Claims (1)

[Claims] 1. An image input device for inputting image data, a host computer for processing the image data input from the image input device, and an image display within a reading range of the image data used as a pointing device of the host computer. And a digitizer having a display device for performing the operation, the host computer and the digitizer are connected by a serial line, image data is input by the image input device, and transferred to the host computer. Vector-to-raster conversion process is performed, and an image of the converted image data is displayed on a display device within the reading range of the digitizer. Digitizer to do.