JPH01192597A - Data enlargement and reduction system of electrostatic plotter - Google Patents

Abstract

PURPOSE:To prevent the overflow of image-forming data out of a paper width to avoid a wasteful process of reforming the data, by obtaining an optimum magnification by a maximum value judgement part and an optimum magnification calculation part and conducting the enlargement or reduction with the optimum magnification. CONSTITUTION:A maximum value judgement part 2 reads input data 1, obtains a maximum value YMAX in a paper width direction, and stores it. Since the input data 1 contains the coordinates of a start point and an end point in image- forming, a maximum value YMAX in a paper width direction is easily obtained. Because an optimum magnification calculating part 3 previously recognizes an effective image-forming area WIDTH in a paper width direction, an optimum magnification N1, which is maximum within a paper width, can be obtained by a formula (I). In an enlargement and reduction part 4, the input data 1 is enlarged or reduced according to the optimum magnification N1 and outputted as enlargement/reduction data 5. An electrostatic plotter forms an image on a continuous paper according to the enlargement/reduction data 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data scaling method for an electrostatic plotter that outputs drawings.

[Conventional technology]

Conventionally, the data scaling method for this type of electrostatic plotter is
As shown in FIG. 2, a scaling factor is given by the user through the user input/output section 7 in the scaling factor specifying section 6, and the input data 1 is sent to the scaling section 4 according to the scaling factor.
The enlarged/reduced data is then outputted as enlarged/reduced data 8.

[Problem to be solved by the invention]

The data scaling method of the conventional electrostatic plotter mentioned above is
Since the input data is simply scaled up or down using the scaling factor entered by the user, if the data exceeds the drawing size limit in the paper width direction and protrudes in the paper width direction, it is possible that the overflowing data will not be drawn. On the other hand, there is a drawback that the drawing data may be so small that it cannot be seen. In this case, the data must be converted from the beginning again, and mistakes may occur in which the data is not noticed.

[Means to solve the problem]

The data scaling method of the electrostatic plotter of the present invention includes a maximum value determination unit that recognizes and stores the maximum value of input data in the paper width direction, and a maximum value determined by the maximum value determination unit and an effective plotting range in the paper width direction. It has an optimal magnification calculation section that calculates an optimal magnification/contraction magnification based on the calculated magnification/contraction magnification, and a magnification/contraction section that scales input data using the calculated magnification/contraction magnification.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

The maximum value determining unit 2 reads the input data 1, determines the maximum value YMAX in the paper width direction, and stores it.

Since the input data 1 includes the coordinates of the starting point and ending point of drawing, the maximum value YMAX in the paper width direction can be easily determined.

Note that since the electrostatic plotter uses roll-type continuous paper, the drawing size is limited only in the width direction of the paper.

The optimum magnification calculation unit 3 calculates the effective drawing range WIDT in the paper width direction.
Since H is recognized in advance, the optimum magnification N1 that fits within the paper width and is the maximum can be determined using equation (1).

N1 WI DTH+YMAX (
1) The enlarging/reducing unit 4 enlarges or reduces the input data 1 using the optimum magnification Nl and outputs it as enlarged/reduced data 5, and the electrostatic plotter (not shown) uses this enlarged/reduced data 5 to print continuous paper. Draw on top of.

〔Effect of the invention〕

As explained above, the present invention is capable of determining the optimum magnification using the maximum value determining section and the optimum magnification calculating section and automatically scaling up and down the input data at the optimum magnification, so that the drawing data does not extend beyond the paper width. In addition, since a screen of an easy-to-read size can be obtained with just one operation, there is no need for unnecessary redoing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, and FIG. 2 is a conventional block diagram. 1... Input data, 2... Maximum value judgment section, 3...
Optimal magnification calculation unit, 4... Enlargement/reduction unit, 5, 8... Enlargement/reduction data, 6... Magnification designation unit, 7... User input/output unit.

Claims (1)

[Claims] A maximum value determination unit that recognizes and stores the maximum value in the paper width direction of input data, and an optimal magnification calculation that calculates the optimal enlargement/reduction magnification from the maximum value determined by this maximum value determination unit and the effective drawing range in the paper width direction. A data scaling method for an electrostatic plotter, comprising: a scaling section; and a scaling section that scales the input data according to the scaling factor.