JPS62217377A - Processing system for vector character and graphic - Google Patents

Abstract

PURPOSE:To generate at high speed a vector character and a graphic, etc., by a small storage capacity, by storing the control point information of a free curve in a memory device, and executing dot display or dot printing as a closed graphic data connected to a control point. CONSTITUTION:Outline information of a character, etc., are stored in a memory deice 101, as the control point information of a free curve consisting of at least a control point and a line kind data. By an index code instructed from a keyboard 105, the outline information of a character, etc., are fetched from the device 101, and brought to dot display as a closed graphic data connected to a control point as the top of a polygon, on a display 103. Also, it is brought to dot printing as a closed graphic data generated by the control point and a line kind data, to a printer 104. Accordingly, on the display device, the dot development is executed by a polygon data having a small calculation quantity and it is displayed, therefore, the responsiveness is secured. As for printing by the printer, the dot development is executed by regarding is as the control point data of a free curve, therefore, the printing of a high quality can be executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an information processing device that creates documents including large, high-quality characters, etc., and particularly relates to vector characters and This relates to graphic processing methods.

[Conventional technology]

Conventionally, in order to generate high-quality characters, etc., it was necessary to
As stated in Publication No. 230, outline information of characters, etc. is stored in a storage device as only stroke (or polygon) data, the character data is retrieved by giving an index code signal, and a polygon filling algorithm is sent to an output device such as a display. It was used to expand and display dots using .

In addition, contour information such as characters is stored in a storage device as free curve data, the free curve data is retrieved by giving a single code signal, and the free curve filling algorithm is used to fill in the free curve data on an output device such as a display. We are also considering a method of expanding and displaying dots.

[Problem that the invention seeks to solve]

・ 2 ・ If you try to store outline information of characters, etc. in polygon data format, you will have to shorten the length of each side and construct the outline of characters etc. from a large number of sides, resulting in a huge amount of data. It required storage capacity.

In addition, especially when generating large characters, the edges of polygons are clearly visible, which results in a decrease in quality.

On the other hand, if you try to generate characters etc. in the free curve data format, the above problem will disappear, but the numerical calculation of the cubic equation is required to dot expand the free curve, so a huge amount of calculation is required, and fi(
It was indeed possible to create a document containing vector characters in an interactive format that required ``second hand''.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for creating documents containing vector characters in an interactive manner with a small storage capacity and at high speed.

[Means for solving problems]

[1] The first method is to store control point information of a free curve with a small amount of data in a storage device, display it as closed figure data connecting the control points as polygon vertices on the display means, and print it out. This is accomplished by dot printing as closed figure data with control points as control points of free curves.

[Effect]

That is, in the present invention, when displaying on a display, the polygon data is treated as polygon data with a small amount of calculation and has a small number of vertices, and is expanded and displayed as dots, thereby ensuring responsiveness. On the other hand, when printing on a printer, it is treated as free curve control point data and expanded into dots, allowing high quality printing.

〔Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing an information processing device for characters and the like used to implement the present invention. In Figure 3, 1
0] is a storage device that stores data such as operating programs and vector characters, and 102 is a central processing unit (hereinafter referred to as CPU).
103 is a display for displaying data such as characters in a dot format; 104 is a block for printing data such as characters in a single dot format; 3;

Link 1-05 is the keyboard.

Figure 1 is a diagram schematically showing the contour information of the character "tree" using free curves such as splines (for details on splines, see 1r Ichida and Yoshimoto, "Spline Functions and Their Applications JPP, 43- 6J, Education) Fi, 1976, !l).1 to 26 are the control points of the free curve, and 1 to 3 are the broken line 2.
7, 3-6 are splines 28° 6-10 are broken lines 29, 1
．． 0-12 are splines 30. 12-14 are splines 31. 14-16 are splines 32. 16-19 are broken lines 33, 19-21- are splines 34, 2.1-23 are splines 3' 5. 23-25 is spline 36.25
˜1 is the control point of the broken line 37.

Figure 4 shows the outline information of the character "tree" in Figure 1 stored in the storage device 1.
01 shows an example of a table when data is stored in a free curve data format. 201 is an index table for extracting the character data using an index code. 202 is an index code of "tree", 203 is character data in the character contour information table 204 in which character data is stored, and 46 is a pointer indicating the starting address.

205 is the record length of line type data 206 to 213, 20
6 to 209 are the number of control points included in the partial curve that constitutes the outline of the character, and 210 to 213 are the type of the partial curve (]
: broken line, 2 nis spline, 3: last line in broken line, last line in 4 nis spline), 2] 4 is coordinate data 214-2
19 record length, 2]-5 to 219 represent the coordinates of each control point.

Consider the case where a character index code 202 is given from the keyboard 105, character outline information is retrieved from the storage device 101, and displayed on the display 103 in dot format. In this case, the partial curve types 210 to 213 constituting the outline of a character, such as splines and broken lines, are all considered to be broken lines (1 or 3), regardless of the type of partial curve actually stored in the storage device 101. In other words, it is regarded as a polygon figure. FIG. 2 shows the outline when all the character outline information in FIG. 1 is regarded as a broken line (1 or 3). To use this as text and color the contents of the polygon in a specified pattern, and display it in 6° brush and dot format, 1. For example, use a fast and well-known algorithm [Polygon Scan Conversion J (for details, refer to r Oyoshi's book "Polygonal Skin"
Conversion”, I) IXE■, (Nci16), P
P, 136-141).

Next, by giving the character index code 202, the storage device 10
Consider a case where the outline information of a character is extracted from 1 or processed interactively on the display (change of coordinate data of control points of the character) and then printed in dot format on the printer 104.

In this case, the partial curve types 210 to 213 are the same as those stored (ie, 1 to 4) for creating character outline information. That is, interpolation is performed using free curves such as splines. First, in order to make the spline function look sufficiently smooth even in dot units, the detailed algorithm 11 that interpolates between control points with short broken lines can be found in the above-mentioned ``Ichikawa and Yoshimoto, Spline Functions and Their Applications J, 11''.
All polygon data. Then, using the above-mentioned "polygon scan conversion" algorithm, the inside of the outline of the character is filled in with a specified pattern in the Dora 1 format. Print this on your printer.

In addition, in the above embodiment, an example was explained in which the inside of the character is filled in, but the character may be displayed or printed without being filled in. Furthermore, although the spline interpolation method has been described using a cubic spline function, other types of spline interpolation may be used.

〔Effect of the invention〕

According to the present invention, since outline information of characters etc. is stored as control point information of free curves such as splines, it is several times smaller than when storing as polygon data to obtain smooth outline information of the same quality. Only 1 storage capacity is required. In addition, when displaying and processing (transforming, enlarging, or reducing) data on a display, the control point data of free curves is treated as if it were the vertex data of a polygon, so the display quality of characters, etc. deteriorates, but responsiveness is ensured. Therefore, interactive processing becomes possible. Here, since characters, etc. are only displayed temporarily on the display, items displaying characters, etc. 7.

Deterioration in quality is not a particular problem. On the other hand, when printing with a printer, it is converted into dot format as free curve data such as splines, so high quality characters etc. can be printed. Here, it is acceptable that some processing time is required during printing, so this is not a particular problem.

[Brief explanation of drawings]

Figure 1 schematically shows the contour information of the character "tree" expressed by free curves such as splines, and Figure 2 schematically shows polygon data connecting the control points in Figure 1 with broken lines. figure,
FIG. 3 is a block diagram showing an information processing apparatus for characters, etc. used to carry out the present invention, and FIG. 4 is a schematic diagram showing a table for storing character outline information regarding the present invention. 1-26...Control point, 27-37...Partial curve of character outline, 101...Storage device, 102...Central processing unit, 103...Display, 104...Printer, 105... Keyboard, 201... Index table, 202... Index code, 203... Pointer to character data table, 204... Character data... 8. Table, 206-213...Line type data, 214-
219...Coordinate data.

Claims (1)

[Claims] 1. A central processing unit (hereinafter referred to as a CPU), a storage device that stores at least operating programs of the CPU and data such as characters, an input device, and a system that stores data such as characters in a dot format. In an information processing device comprising a display means for displaying a display and a printing means for printing in a dot method, contour information such as a character is stored in the storage device as control point information of a free curve consisting of at least control points and line type data. , the outline information of the character, etc. is retrieved using the index code specified by the input device, the dots are displayed on the display means as closed figure data connecting the control points as the vertices of polygons, and the information is displayed on the display means as closed figure data, and A vector character/figure processing method characterized in that dots are printed as closed figure data created using the control points and the line type data.