JPS6395491A - Character/symbol display - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for displaying maps, drawings, and document information, and in particular, the present invention relates to a method for displaying maps, drawings, and document information, and in particular, the present invention relates to a method for displaying maps, drawings, and document information. The present invention relates to a display method suitable for displaying at an enlarged magnification.

[Conventional technology] In conventional systems such as CAD and word processors, in addition to figures, drawings and document information including text and symbol data are displayed on display devices such as CRTs and liquid crystals, and can be searched, edited, etc. The configuration is such that the processing is added interactively. In particular, in the map/drawing information processing system introduced in the literature (PIXEL, March 1984 issue N0118.pp, 58-104, published by Graphic Information Processing Center), character/symbol data is stored in a drawing information table in advance. The display is configured according to stored attribute values such as size, tilt, font, etc., and various search and editing processes are added interactively.

[Problem that the invention seeks to solve]

Conventionally, in such systems, there have been many requests to dynamically enlarge details or reduce them in order to see the whole picture, and it has been difficult to display characters and symbols using attribute data stored in files or memory in advance. many. However, with such conventional technology, when a small area is enlarged, the font quality of displayed characters and symbols is poor, and when a wide area is reduced, a display request with a resolution higher than that of 5 display devices is required. This may cause problems such as the displayed characters and symbols becoming illegible.

An object of the present invention is to provide a display method for obtaining clear display results on a display screen even when a request for displaying characters and symbols is made in arbitrary display dimensions including such enlargement and reduction. It is in.

[Means for solving problems]

The above purpose is to prepare multiple sets of font dictionaries for displaying characters/symbols for each font such as Mincho font or Gothic font, and when displaying a single character/symbol, the font dictionary is stored in memory. This is achieved by converting the size in the table into the absolute size on the actual display device using the actual value, and displaying while automatically switching the optimal font dictionary according to the value.

[Effect]

With this display method, when displaying characters and symbols with small display dimensions, by using a font dictionary based on line vectors or a font dictionary that considers shading values, it is possible to make the characters and symbols unreadable on the display device. This has the effect of expanding the range of minimum dimensions of characters and symbols. - When displaying characters/symbols with large right display dimensions, using a font dictionary or the like has the effect of making it possible to display the characters and symbols with higher quality than with line vector fonts.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an example of the configuration of a system for implementing the present invention, in which 100 is a CPU that executes processing, 101 is a file device for storing map and drawing data, and 10 is a file device for storing map and drawing data.
2 is a main memory for storing programs for executing various processes such as editing and searching, and data being processed.

103 is a CRT for displaying processing results;

Reference numeral 104 indicates a keyboard for inputting commands and parameters, and reference numeral 105 indicates a font storage memory for storing fonts of characters and symbols for display. In particular, the structure of the map and drawing data stored in the file device 101 is as follows.For example, graphic components are stored in a graphic table of the format shown in FIG. This figure table contains the number of line segment points N, line type information, line number T, and coordinate data (X (1), Y (1) --
---X (N).

Y(N)) is stored. On the other hand, the character/symbol table is stored in a format as shown in FIG. This character/symbol table has the number of characters M
, font type C, box width Bw, box height rl
H, inclination angle TH, reference X.

Coordinates X (0), basic monk Y coordinates Y (0), character code fcD(1)...CD(M)) are stored. The font table of characters and symbols stored in the font storage memory 105 has a structure as shown in FIG.

In the above configuration, when a display request is issued from the keyboard 104, the procedure for displaying map and drawing data on the CRT' 103 is as follows. When a command is input from the keyboard 104, the program in the main memory 102 is started, and the
Using the method shown in 725, a portion of the range necessary for display is cut out from the map or drawing data stored in the file device 101. As a result, the figure component to be displayed is obtained from the figure table in Figure 3 by the coordinate data string ((x(1), y(1), (x(2), y(2)
)...(x(n), y(n))) is the main memory 10
2, and the CPU 100 develops these data into graphic data such as points, lines, and areas. On the other hand, character/symbol data.

From the character/symbol table in Figure 4, box width BW and
Using the box height BH, convert it to the absolute display size on the CPU 100, find a font group that matches the adaptive size in the font table in Fig. 5, and match the font type, and then calculate the characters in Fig. 4. Font data that matches the code ((Xm 1 yYm t), (xm 2+ '1m
2L...'+(xmTn'+YTnyn')) is calculated. Then, the CPU 100 generates characters according to this coordinate string, and the reference coordinates (X(0) in FIG. 4).

Y(0)) is displayed on the CRT] 03 in the format shown in FIG.

Here, the font table shown in FIG. 5 will be explained in more detail. The font data in this table is shown in Fig. 5 as (1) the circular line of the character, (2)
) is shown as a coordinate string that constitutes the center line of a character, etc.
(3) Rusk image black and white dot pattern, (4)
A dot pattern or the like that takes into account the shading values of black, white, and gray may also be used. The current C as a display device in Figure 2 103
Considering RT, the average number of scanning lines is about 3 lines/mm, and assuming that the display target is, for example, Mincho kanji with a 24×24 dot configuration, the minimum character size needs to be about 8 mm in absolute size. However, when displaying character/symbol data other than this size, the processing time for enlarging/reducing the image generally takes longer, so it is necessary to use dot fonts prepared independently for each size, centerline fonts written using vector coordinate strings, etc. Speed up by using circular line font. Next, a method of switching to an optimal font for displaying character/symbol data having an arbitrary size using these fonts will be described.

(Step 1) First, as the display size of characters and symbols,
2 mm or less is called "micro size", 2 to 8 mm is called "small size", and 8 to 10 mm is called "medium size J".
y Those with a diameter of 10 mm or more are classified as "large size". This ranking depends on the complexity of symbols/characters and the resolution of the display device, and the ranking shown here is not absolute.

(Step 2) Next, for each rank, set the above-mentioned display font correspondence to (4) for minute size and (2) for small size.
, (3) is determined for the medium size, and (1) is determined for the large size. This is because in the case of small sizes, center line fonts have the advantage of describing display elements with lines, which causes less clutter than dot fonts; This is because the enlargement procedure for fonts is simpler.

(Step 3) Then, by the method described later, the absolute display dimensions of character/symbol data to be displayed on the display device are determined, and it is determined to which position of the ranks defined in the previous step the dimensions belong.

Then, select fonts that have a corresponding relationship for each rank.

For example, when displaying a character with an absolute display size of 7 mrtr, the rank is succumbing to small, so a centerline font is selected as the font associated with that rank.

Furthermore, a plurality of groups of these font data are prepared for each font type, such as Mincho font and Gothic font.

In this case, if font data is stored as coordinate values indicating the center line or ring line, multiple sets of adaptive sizes for the same font type must be prepared even if the character code is the same, which increases the capacity of the font data. There is an interlayer where the amount increases. Therefore, instead of using the coordinate values themselves that make up a font as font data, the font data stores control bits that indicate the presence or absence of the coordinate data and a pointer that indicates the coordinate position, thereby reducing the overall font data capacity. Use methods to reduce Details of this method will be explained with reference to FIGS. 7, 8, and 9. Figure 7 shows
This is a diagram showing the font data in the font table. For example, as an example of the centerline font for the kanji ``dokoro'' (
(a) and (c) are shown as examples of circular line fonts. The storage format of these fonts in the font table is shown in FIG. , font data stored in the font symbol value of characters and symbols within each font series, and flag values to distinguish whether the font data is a center line or an outline, or whether pointer information is stored. configured. In this case, FIG. 8 shows an example in which numerical values having the following correspondence are assigned as flag values. First, if the font coordinate value itself is stored for a centerline font, it is 100, and if it is an outline, it is 110. On the other hand, for a centerline font, a pointer for configuring a reduced font is stored. toi for case, and also pointer, 11 for contour line.
Assign a value such as 1. Furthermore, a method for storing pointer information using this font data will be described in detail according to FIG. When the centerline font of a character corresponding to the font code "BDE8" is given as shown in Figure 7(a), the character occurrence reference point 0 is given as the font data.
In the form of relative coordinate values centered on (OX, Oy), the point sequence ((R1, R2...'Rq) (Rlo, R+t...
- In the order of RJ (R15, Rxa...R2G)), the (x + y) coordinate values are shown in Figure 5 ((x 1.y ,) (x 2.y -) - (x 9
．． y 9)) ((x, o, y, fl)...)). On the other hand, as an example of a reduced display font, as shown in FIG. 7(b), it is constructed using a part of the coordinate values in (a) above. That is, the point sequence ((Pl, Pz”・Ps
) (Pe, P), Ps) (pH”・Pl3)), instead of storing the coordinate values in the order of
(101214)...), enter pointer information to indicate the position of the coordinate value in (a) above, and share the font data. That is, for example, the point sequence (P1PzP3P4Ps) in the reduced font corresponds to (R1R4Rs R7Rs) of the center line font data in (a), and the coordinate values are exactly the same, so instead, the point sequence from the beginning of the point sequence is By writing pointer information indicating the position, the font data storage capacity is reduced. On the other hand, the reduced font of the outline font data is serialized using a centerline font in order to minimize the collapse that occurs during reduced display. The font data in that case also stores pointer information for sharing the coordinate values to the original outline data. For example, the dot sequence (P I P 2...ps
) is the dot sequence (R1R3...) of the outline font in (C).
R20), the pointer information (1, 3...20) is stored as shown in FIG.

In addition, instead of such pointer information, as in the case where the font type is Mincho and the adaptive size is 3 in the lower part of Fig. 8, there is a control for controlling whether or not to adopt the coordinate values of the font data. Bits may be stored. In other words, the font data for Gothic font/adaptive size 1 is as follows.

((xt, yt) (xz, yz)...(X 9 r'
J 9 )) ((XiO+YID)(x, t+yu)・
)), and a control bit flag of 1 is given when this coordinate data is adopted, and O when it is not adopted, in correspondence with each coordinate position as follows.

((1,0,...,1)(0,O,...)
) The meaning information regarding the font symbols in the font table shown in FIG. 8 is stored in the flag content table shown in FIG. That is, in the case of flag value 100 or 110,
101°111 indicates that the font data itself contains pointer information;
02°112 indicates that control bit information is stored in the font data. In the case of the latter two, a reference destination in which the entity of the font is stored is also stored.

The capacity for storing such pointer and control bit information is much smaller than that for storing coordinate data.

The process of displaying the character/symbol data stored in the format shown in FIG. 4 on the display device 103 using the compressed and stored font data using the above method is as follows. Become.

<Step 1> From the number of characters M in Figure 4, M character codes CD
(1) Find ~CD (M). Also, set the font type to C9
Each character display size is obtained from BH.

Step 2> Convert the character display size to an absolute size on the display device 103, and determine which adaptive size that value corresponds to.

<Step 3> Next, referring to Figure 8, enter the font symbol, font type,
Flag value FL and font data F that match the adaptive size
Find D.

Step 4> Refer to the flag content table in FIG. 9 to find the content that matches the flag value FL. If this content is other than an entity, the reference destination is further determined, and the value of the reference destination is also determined.

<Step 5> If the content of the flag value obtained in the previous step is an entity, follow the content of the font data and set the reference coordinates (X (0
), Y (0) ) and draw five characters on the display device at an inclination angle TO.

On the other hand, if the flag value is a pointer, font data is obtained from the entity referred to in the font table, only the font components indicated by the pointer value are extracted and reconstructed, and then drawn in the same manner as described above. Also, even when the flag value is given as a control bit, the font data is obtained from the entity referred to in the font table, and only the font components indicated by the pointer value are extracted and reconstructed, and then the same method as above is used. Draw with.

Next, before actually displaying characters and symbol data on the CRT I O3, convert the box width BW and box height BH of the character and symbol table in Figure 4 into absolute dimensions on the CRT in advance. We will explain the method for this purpose.

As shown in Figure 1, the user-defined coordinate system (hereinafter U[X-
By converting data in a display device coordinate system (hereinafter abbreviated as picture space P [X-Yl), display data such as figures, characters, symbols, etc. are made independent of device coordinates. That is, in U[X-Yl, the area to be displayed is defined as a window (W IW z W 3 W 4 ), and it is defined as the viewport (V
fiV3V3V4) and automatically gives the transformation of the two coordinate systems. Therefore, the box height BH and box width BW for defining the size of characters and symbols as shown in Fig. 6 are expressed as ', BW'.

BW' = BW-XFACT-LX BH' = BH-YFACT-LX-kWIW2 is the length of the window in the X direction w 1 w 4 is the length of the window in the y direction VlVz is the length of the viewport in the X direction VlV4 is the length of the viewport in the y direction The viewport size ratio (vertical/horizontal) is this BW'
, BH' are calculated in advance before displaying characters/symbols.1For example, using the smaller data of BW' and BH',
By checking in which range of the adaptive size the value falls, it becomes possible to use it as a basis for automatically switching the optimal font data.

〔Effect of the invention〕

According to the present invention, it is possible to select the optimal display font for character/symbol data of any size by considering the size of the data on the display device.
It has the effect of displaying symbols.

[Brief explanation of the drawing]

Figure 1 is a principle diagram for calculating absolute dimensions on a display device, Figure 2 is a system configuration diagram, Figure 3 is an example of a figure table, Figure 4 is an example of a character/symbol table, and Figure 5 is an example of a character/symbol table. An example of a display font table. Figure 6 is a diagram showing the correspondence between the character/symbol table and the actual display. Figure 7 is a principle diagram showing the sharing of font data. Figure 8 is a diagram showing the correspondence between a character/symbol table and the actual display. Figure 8 is a diagram showing the principle of sharing font data. - A diagram showing a table format for storing font data in which symbols are shared. FIG. 9 is a diagram showing a table format for storing the meanings of the flags in FIG. 8. In FIG. 2, 100 is a CPU, 101 is a file device for storing map and drawing data, 102 is a main memory for processing, 103 is a display device for displaying processing results, 104 is a keyboard, and 105 is a character -Memory that stores fonts for displaying symbols. Uaa - Seed the foot people (U (χ, 2nd mouth, 3rd prisoner, 4th prisoner, 5th

Claims (1)

[Scope of Claims] 1. A data storage unit for storing character/symbol data having various dimensions, a display unit for displaying the character/symbol data, and an optimal display unit for displaying the character/symbol data on the display unit. a font data storage unit that is organized into multiple groups according to display dimensions; an operation input unit for specifying display requests to the display unit; and a processing unit that executes the necessary processing to display the character/symbol data on the display unit. When displaying the character/symbol data on the display section, it calculates the dimensions of the characters/symbols on the display section, and stores the calculated dimensions in the font storage section. A method for displaying characters and symbols, characterized by using font data compatible with . 2. In claim 1, a plurality of sets of series by display size in the font data storage unit are prepared for each font such as Mincho font and Gothic font, and within the series for each font, the above-mentioned calculated 1. A method for displaying characters and symbols, comprising: selecting a font series suitable for the specified dimensions; and using font data corresponding to character and symbol data from the series. 3. In claim 1, a plurality of series for each display size in the font data storage section are prepared for each absolute display size of characters/symbols on the display section, and among these, for minute dimensions, Characters and symbols are displayed by assigning and storing font data such as dots that take into account shading values, center lines of characters and symbols for small dimensions, binary black and white dots for medium dimensions, and circular lines for large dimensions. A method for displaying characters and symbols, characterized in that, when displaying a character/symbol, absolute display dimensions are calculated, and font data adapted to the calculated dimensions are used. 4. In claim 1, when the character/symbol data for display is stored in the font data storage unit, the font data is shared among fonts grouped by font, etc. How to display characters and symbols. 5. In claim 4, character/symbol data with a small display size is defined as a pointer to a font of character/symbol data with a larger size, without storing the font itself that fits the size. A method of displaying characters and symbols characterized by storing information. 6. In claim 4, the character/symbol data with a small display size does not store the font itself that fits the size, but shares the font of the character/symbol data with a larger size than the size. A method for displaying characters and symbols, characterized by storing control bit information for the characters and symbols.