JPH0628438A - Drawing processing system - Google Patents

Abstract

PURPOSE:To hold an adjacent relation of an enlarged part and its peripheral part in a drawing, and also, to make the periphery of the enlarged part which follows the enlargement of the drawing visible, at the time of displaying the drawing by enlarging and reducing it. CONSTITUTION:With respect to drawing data shown in a figure (a) before an enlarged display, based on area management information for designating an enlargement object area 601, an enlarged area 601 and a buffer area 602 inputted by a user, the enlargement object area, the enlarged area and the buffer area are set, respectively, and a coordinate value of a point in the enlarged area corresponding to a point in the enlargement object area, a coordinate value of a point in the enlarged buffer area corresponding to a point in the buffer area, and a coordinate value of a point in the outside of the enlarged buffer area corresponding to a point in the outside of the buffer area are derived, and a picture element value of a point in the enlargement object area, a picture element value of a point in the buffer area, and a picture element value of a point in the outside of the buffer area, are copied to coordinates of the corresponding points, respectively, and displayed like a figure (b) after the enlarged display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for displaying or printing drawings such as maps and layout drawings, which can be referred to while maintaining the continuity of the positional relationship of these enlarged or reduced drawings. The present invention relates to a system that enables suitable display.

[0002]

2. Description of the Related Art Conventionally, a system has been used in which drawings such as maps and layout drawings are stored in a computer and these drawings are used on the computer. An example of such a map is shown in FIG. A map information system is a typical example of such a system. The map information system is introduced, for example, as a system for supporting facility management of roads and the like of local governments and planning and planning work. There are three cases of using the map information system as follows. When you want to understand a wide range as a whole. When you want to get information from a drawing focusing on a specific area or place. I am focusing on a specific area and place, but also what kind of situation is around it, what kind of position the place of interest is in a wider area, etc.
When you want to understand by associating parts with the whole. In the above-mentioned usage method, the display function of the entire drawing and the expansion function of the designated area of the drawing are used for, and there is no problem in usage. For the case of enlarging a part of a drawing such as a map or layout diagram and simultaneously displaying a wider area of the drawing, the following method is used in the conventional system. There are challenges as mentioned. (1) A method of dividing a display screen into an enlarged view of a part of the drawing and a drawing showing the entire drawing and displaying them as independent drawings on a display device as shown in FIG. 4, for example. As such an example, for example, "drawing information display system"
(JP-A-1-72263) and the like. (2) A method of enlarging a portion to be enlarged without changing the display position in the entire drawing and displaying it as shown in FIG. 5, for example.

[0003]

In the above-mentioned method (1) of the prior art, as shown in FIG. 4, a partially enlarged view of the drawing and the entire drawing are displayed at the same time. Since the part and its peripheral part are not displayed continuously, it is difficult to understand how the enlarged part is related to the whole. For example, in the case of a drawing such as an LSI mask pattern that is spread with fine figures or a map that does not have an appropriate target object, it becomes difficult to specify the point of interest on the drawing, and such a problem becomes prominent. . In addition, the prior art (2)
In this method, as shown in FIG. 5, even when it is desired to view the partially enlarged portion and its peripheral portion at the same time, the portion adjacent to the enlarged portion that is displayed in the overall view by the enlarged display is covered by the enlarged view. Therefore, there is a problem that the part adjacent to the enlarged part cannot be seen.
An object of the present invention is to solve the problem that the periphery of the enlarged portion becomes invisible as the figure is enlarged while maintaining the continuity of the enlarged portion of the figure and its peripheral portion. It is to realize the display that maintains the sex. When such a display is realized, for example, it becomes possible to display the enlarged portion and the roads passing through the peripheral portion without interruption.

[0004]

In order to achieve the above object, the present invention provides area management information for specifying an enlargement target area, a post-enlargement area, and a buffer area input by a user with respect to input drawing data. Based on the enlargement target area, the post-enlargement area, and the buffer area, respectively, the coordinate values of the points in the post-enlargement area corresponding to the points in the expansion target area, and the post-enlargement buffer area in the buffer area The coordinate value of the point and the coordinate value of the point outside the buffer area after enlargement corresponding to the point outside the buffer area are calculated, and the pixel value of the point within the enlargement target area, the pixel value of the point within the buffer area and the outside of the buffer area The pixel values of the points were copied to the coordinates of the corresponding points, so that the continuity of the enlarged portion of the figure and its surroundings was maintained, and the periphery of the enlarged portion was made visible as the figure expanded.

[0005]

According to the present invention, the display in the area to be enlarged in the drawing is enlarged and displayed in the area after enlargement, and the display in the buffer area before enlargement in the drawing is reduced and displayed in the buffer area after enlargement. It is displayed, and the display in the area outside the buffer area is displayed as it is without changing, and the display of the enlarged drawing may be reduced from the display of the drawing before enlargement, but it may disappear completely. There is no. Then, the display near the boundary between the areas after enlargement is maintained in continuity across the areas.

[0006]

Embodiment 1 An embodiment of the present invention will be described in detail below with reference to the drawings. 1.1 Display Example This section describes a display example when the present patent is applied to a map. FIG. 7 is a diagram before the enlarged display of the map performed in this embodiment (see FIG.
(A)) and a display example after enlarged display (FIG. 7 (b)).
In this display example, there are three houses, Yamada, Kawaguchi, and Mori on the map, and the area around the Yamada family is enlarged and displayed. Figure 7
The inner circle (radius R1) in FIG.
It shows the boundary of 1), and the inside of this circle is the expansion area (60
1). The outer circle (radius R2) is the buffer area (60
The boundary between 2) and the invariant region is shown, and the outside of this circle is the invariant region (603). After the enlarged display, the radius of the inner circle increases from R1 to R1 ′, but the radius R2 of the outer circle does not change before and after the enlarged display. Further, the graphic in the invariant area does not change even after the enlarged display as shown in FIG. Since the buffer area (602) is surrounded by these two circles,
As shown in FIG. 7 (b), when the inner circle becomes larger due to the enlarged display, the area of the buffer area (602) becomes smaller, so that the figure in the buffer area is also reduced. As a result, after the enlarged display, the display of the Kawaguchi family in the buffer area on the donut is reduced as the shape of the buffer area (602) is changed. However, the display of Moriya outside the buffer area (602) does not change in position and size before and after the enlarged display.

The straight line near the Yamada family in FIG. 7 (a) represents a road. This road spans three areas (enlargement area, buffer area, and constant area). Figure 7
Although the road in the expansion area (601) is expanded as shown in (b), the width of the road in the invariant area does not change. The road in the buffer region that connects the two regions (enlargement region and invariant region) is narrower from the inner side toward the outer side, but is continuous without interruption. In this way, the connection relations of the figures spanning the regions are maintained.
As described above, in this embodiment, the shapes of the enlarged region (601), the buffer region (602), and the invariant region (603) are represented by circles. The shape of these circles is defined by their radius. Name these radii as follows: (1) Radius of a circle indicating the enlargement area before enlargement: R1 (2) Radius of a circle indicating the enlargement area after enlargement: R1 '(3) Radius of a circle serving as a boundary between the buffer area and the invariant area: R2 Since the radii of these circles indicate the shape of each area, they are collectively referred to as area management information.

1.2 Implementation Example An implementation example of the above-described display will be described below.

(1) Device Configuration First, the device configuration of this embodiment will be described with reference to FIG. The system includes a memory (201), a CPU (20
2), computer body (204) consisting of display circuit (203)
And a coordinate input device (205), an image input device (206), an image printer (207), and a display device (20) connected to this.
8), a keyboard 209, and a secondary storage device 210. The memory (201) is software for realizing the processing described below, graphic data to be processed,
Also, the management information of the area required for processing is held. The coordinate input device (205) is a device for designating the position of the graphic displayed on the display device (208), and a mouse, a tablet or the like is used. A high resolution graphic display or the like can be used as the display device (208). Image input device (2
In 06), a map printed on mylar paper or paper is read as an image. Image printer (207)
Is a device for printing a map drawing created by a computer.

(2) Software Structure and Data Structure Next, the software structure of software which is the control information of this embodiment and the data structure will be described. These software and data are arranged on the memory (201). FIG. 1 shows the software structure and data structure in this embodiment. An example of the configuration of each software is shown below.

(A) Graphic processing unit The graphic processing unit (101) controls the device control unit (102) to perform input / output, display, transformation, and dialog control with the user of the graphic associated with the graphic processing. -Overall control unit The overall control unit (110) includes an enlargement target area setting unit (111),
The execution order of the post-enlargement area setting unit (112), the buffer area setting unit, and the area transformation processing unit (114) is controlled, and the control right is passed to each unit. Enlargement Target Area Setting Unit The enlargement target area setting unit (111) sets the shape of the area that the user wants to enlarge in the figure before transformation. The shape of the enlargement target area is stored in the area management information area (115). Post-Enlargement Area Setting Unit The post-enlargement area setting unit (112) sets the shape of the enlargement area after the deformation process desired by the user. The shape of the enlarged area is stored in the area management information area (115). -Buffer area setting section The buffer area setting section (113) sets the shape of the buffer area. The shape of the buffer area (602) is the area management information area (1
15). Area Deformation Processing Section The area deformation processing section (114) refers to the area management information and the pre-deformation graphic data of the graphic data area 1 (103) to create the post-deformation graphic data, and the graphic data area 2 (104). To store. Area management information storage area The area management information holds shape data (R1, R1 ', R2) of each area of the expansion target area, the expanded area, the buffer area (602), and the invariant area (603). These shape data are stored in the enlargement target area setting unit (111) and the post-enlargement area setting unit.
(112), set by the buffer area setting unit (113), and referred to by the area transformation processing unit (114).

(B) Device Control Unit The device control unit (102) controls the following devices under the control of the graphic processing unit (101). Display control unit Controls the display circuit (203) to input graphics, characters, and coordinate input devices
The cursor (205) or the like is displayed on the display device (208). Secondary Storage Device Control Unit Controls the secondary storage device (210) and inputs / outputs graphic data between the memory (201) and the secondary storage device (210). -Coordinate input unit Controls the coordinate input device (205) to input coordinates on the display device. -Keyboard control unit Controls the keyboard (209) and inputs numerical values and character information. Image input unit Controls the image input device (206) and reads the drawing. The read drawing is stored in the graphic data area 1. Image printing unit Controls the image printer (207) and prints the drawing.

(C) Graphic data area 1 It holds graphic data before enlargement conversion. (D) Graphic data area 2 Holds graphic data after enlargement conversion.

(3) Outline of Processing and Display Example The outline of processing and a display example of each processing will be described below. The actual processing is performed by the overall control unit (1) of the graphic processing unit (101).
10) is performed by passing control to lower modules (enlargement target area setting unit, post-enlargement area setting unit, buffer area setting unit, area deformation processing unit).

FIG. 8 shows a flowchart of the overall control unit (110), and the flow of this control will be briefly described below. From the secondary storage device (210), the drawing data is stored in the graphic data area 1
It is read to (103) (step 901). The display control unit (120) displays the graphic data before conversion in the graphic data area 1 (103).
Through a display device (step 902). Control is passed to the enlargement target area setting unit (112) to set the enlargement target area in the area management information area (115) (step 90).
3). Next, control is passed to the post-enlargement area setting unit (112),
The enlarged area is set in the area management information area (115) (step 904). Further, control is passed to the buffer area setting unit (113), and the buffer area (602) is set as the area management information area.
It is set to (115) (step 905). Then, control is passed to the area transformation processing unit (114), the transformation processing is performed on the pre-conversion graphic data in accordance with the area management information, and the graphic data area 2 (1
04) to create the converted graphic data (step 90)
6). Finally, the converted graphic data is displayed on the display device through the display control unit (120) (step 907).

The functions and display examples of each module to which control is passed from the overall control unit 110 will be described below. (A) Setting of Enlargement Target Area FIG. 9A shows a display example when setting the enlargement target area. The enlargement target area setting unit (111) inputs the center coordinates and the radius R1 of the area to be enlarged by the coordinate input device and sets them in the area management information area (115). (B) Setting of Area after Enlargement FIG. 9B shows a display example when setting an enlargement target area after enlargement. The post-enlargement area setting unit (112) inputs the radius R1 ′ of the enlargement area (601) after enlargement from the coordinate input device (205) and sets it in the area management information area (115). (C) Setting of buffer area FIG. 9C shows a display example when the buffer area (602) is set. The buffer area setting unit (113) is a buffer area after expansion.
The radius R2 of (602) is input from the coordinate input device (205) and set in the area management information area (115). (D) Area Deformation Processing FIG. 9 (d) shows a display example after the deformation of each area. The expansion area (601) is expanded, but the invariant area (603) does not change before and after the deformation. Further, the buffer area (602) is reduced and deformed so as not to lose the continuity with the invariant area (603) by being deformed.

(4) Map Image Conversion Processing Next, the map image conversion processing performed by the area transformation processing unit (114) will be described in more detail. FIG. 10 is a diagram showing the principle of conversion processing of a map image. Before and after the enlargement process, the outer diameter of the circle indicating the buffer area (602) does not change and is fixed. In this embodiment, polar coordinates are used for the map image transformation process. The map image developed in the graphic data area 1 (103) on the memory (201) has a value (hereinafter, referred to as a pixel value) indicating light and shade for each coordinate. The pixel value on the coordinates developed in the graphic data area 1 (103) is taken out, and this pixel value is copied to the graphic data area 2 (104). At this time, the coordinates of the image are converted by calculating the storage coordinates of the pixel value in the graphic data area 2 (104).
This coordinate conversion process will be described with reference to FIG. The point A corresponds to the point A ′, the point B corresponds to the point B ′, and the point C corresponds to the point C ′. The polar coordinates of each point are indicated by the angle θ and the radius r. While changing the angle θ and the radius r, the pixel value of the graphic data area 1 (103) is changed to the graphic data area 2 (104).
Image conversion is performed by copying to. The flow of this processing is shown in FIG. First, the angle θ is initialized to 0 (step 1101). The processing after step 1103 is repeated within the range of θ ≦ 2π (step 1102). The radius r is initialized to 0 (step 1103). While the coordinates (θ, r) are within the image area of the graphic data area 1 (103), the processing after step 1105 is repeated (step 1104). A pixel value corresponding to the coordinates (θ, r) is extracted from the graphic data area 1 (103) (1104).
If r ≦ R1, it is determined to be the enlarged area (601) (step 1106), and the radius r ′ of the copy destination of the pixel value is calculated as in (Equation 1) (step 1107).

[0018]

## EQU1 ## r '= r.times.R1' / R1 ... (Equation 1) If R1 <r.ltoreq.R2, it is determined to be a buffer area (step 1
108), the radius r'of the copy destination of the pixel value is calculated as in (Equation 2) (step 1109).

[0019]

## EQU00002 ## r '= R1' + {(r-R1) (R2-R1 ') / (R2-R1)} ... (Equation 2) If r> R2, it is judged to be outside the buffer area. (Step 1
110), and the radius r is directly set as the radius r '(step 1111). Then, the pixel value is copied to the coordinates of the graphic data area 2 (104) corresponding to the coordinates (θ, r ′) (step 1112). After that, the increment Δr is added to the radius r (step 1113), and the process after step (1104) is repeated while the coordinate (θ, r) is in the image area.
After this repetition is completed, the increment Δθ is added to the angle θ (step 1114) and the processing after θ is 2π or less (step 1103) is repeated. After this, the graphic data area 2 (10
4) The above converted image is displayed on the display device (step 1114).

1.3 Expansion of this Embodiment This embodiment can be expanded as follows with a simple modification. (1) In this embodiment, as shown in FIG. 2, the secondary storage device (2
The map drawing is read out from the memory 10 from step 10) (step 201), but the drawing is input by the image input device.
It is also possible to input to the computer main body from (206),
It is also possible to input from the outside through the network.

(2) In this embodiment, the shapes of the enlarged area (601) and the buffer area (602) are set as circles as shown in FIG. 7, but they may be set as arbitrary closed figures as shown in FIG. Is also possible. In this case, the expansion area (601) and the buffer area (60
The radius of the polar coordinates from the origin of the point that becomes the boundary of 2) (see FIG. 13).
R1, R2, R1 ′) of the above are different depending on the angle θ. Therefore, when such expansion is performed, the radii R1, R2, and R1 ′ are recalculated each time θ is changed. This makes it possible to extend and apply this embodiment even when a closed figure is used. FIG. 14 shows a flowchart of image conversion when such extension is performed. First, the angle θ is initialized to 0 (step 14001). The processing after step 1403 is repeated within the range of θ ≦ 2π (step 1402). The distance R1 between the straight line of the angle θ passing through the origin and the boundary of the enlarged region before enlargement is obtained. Similarly, the distance R2 between the straight line having the angle θ passing through the origin and the boundary of the buffer area is obtained. Similarly, the distance R1 ′ between the straight line of the angle θ passing through the origin and the boundary of the enlarged region after enlargement is obtained (step 140
3). The radius r is initialized to 0 (step 1404).
While the coordinates (θ, r) are within the image area of the graphic data area 1 (103), the processing after step 1307 is repeated (step 1405). Pixel values corresponding to the coordinates (θ, r) are extracted from the graphic data area 1 (103) (1406).
If r ≦ R1, it is determined that the area is the enlarged area (601) (step 1407), and the radius r ′ of the copy destination of the pixel value is calculated as in (Equation 1) (step 1408). R1 <r ≦ R2
If so, it is determined to be a buffer area (step 1409), and the radius r ′ of the copy destination of the pixel value is calculated as in (Equation 2) (step 1410). If r> R2, it is judged to be outside the buffer area (step 1411), and the radius r is kept as it is.
The radius is r ′ (step 1412). Thereafter, the pixel value is copied to the coordinates of the graphic data area 2 (104) corresponding to the coordinates (θ, r ′) (step 1413). Then, increment Δr is added to the radius r (step 1414),
While the coordinate (θ, r) is in the image area, the step (140
6) The subsequent processing is repeated. After this repetition, the angle θ
Is incremented by .DELTA..theta. (Step 1415) and .theta. Then, the converted image on the graphic data area 2 (104) is displayed on the display device (step 1416).

(3) In the present embodiment, as shown in the flow chart of FIG. 12, the conversion of the figure is performed by converting the radius r before the conversion of the polar coordinates of the point where the pixel is copied to the radius r ′ after the conversion. I went. FIG. 15 shows the relationship between r and r ′ at this time. In FIG. 15, the horizontal axis represents the radius r before conversion and the vertical axis represents the radius r ′ after conversion. The radius r'after conversion is
For example, the value on the vertical axis corresponding to the value on the horizontal axis, such as R1-D1-R1 ', can be obtained by sequentially tracing the graph of FIG. When the radius r before conversion is R1 or less, the radius r ′ after conversion is r ′ = r × R1 ′ / R1 in the above (Equation 1).
Was asked for. Thus, the rate of change is constant between O and D1, and the figure is not distorted. In such a case, a straight line is formed between O and D1. If the points D1 and D2 are continuous and monotonically increasing, the continuity of the figure can be maintained regardless of the path. Therefore, between D1 and D2, the continuity of the figure can be maintained by any of the following paths. Since it can be held, the conversion rate can be set in these three paths. D1-a-D2: When the rate of change is high initially and then decreases D1-b-D2: When the rate of change is constant D1-c-D2: When the rate of change is low initially and then increases.

(4) When (3) is further expanded, the case of FIG. 16 can be considered as the relationship between r and r '. In this case, the slope of the straight line O-D1 is smaller than 1 and the vicinity of the origin is reduced, and the slope of the straight line D1-D2 is larger than 1 and the peripheral portion is enlarged.

(5) Further, by expanding (4), it is possible to narrow down the conditions applied to the relationship between r and r'to the following two. [Applicable condition to the relationship between r and r '] It is a monotonic increase. When r = R2, r ′ = r. FIG. 17 shows an example of the relation r-r 'in this case. The size of the entire displayed area before and after conversion is the same,
Some parts are locally enlarged or reduced.

[0025]

Second Embodiment In the first embodiment, an example is shown in which a circle is used as the shape of a region for deforming a figure. In the second embodiment, the first embodiment
As an example different from, the case where a rectangle is used as the shape of the area will be described. Configuration of device for realizing this embodiment, and
The outline of the processing is the same as that of the first embodiment.

2.1 Display Example FIG. 18 is a display example before and after enlarged display of the map performed in this embodiment. In the display example, Yamada, Kawaguchi,
There are three houses in the forest, of which the area around the Yamada family is enlarged. The inner rectangle shows the area to be enlarged, and the outer rectangle shows the buffer area (602). The inner rectangle is enlarged with the enlarged display, but the outer rectangle showing the buffer area (602) does not change before and after the enlargement. When the inside rectangle is enlarged and displayed, the area of the buffer region (602) becomes smaller. As a result, the display of the Kawaguchi family in the buffer area is reduced as the shape of the buffer area (602) is changed. However, the display of Moriya outside the buffer area (602) does not change in position and size before and after the enlarged display.

2.2 Implementation Example (1) Device Configuration Since the device configuration is the same as that of the first embodiment, the description thereof is omitted here. (2) Outline of processing Since the outline of processing is the same as that of the first embodiment, description thereof is omitted here.

(3) Map Image Conversion Processing In this embodiment, the shape of the region is rectangular unlike the first embodiment. In the following, the map image conversion process (step 906 in FIG. 9) in such a case will be described. In this embodiment, as shown in FIG. 19, an orthogonal coordinate system having a point O as an origin is used. The enlarged area (601) is an area surrounded by the rectangle ABCD (or A'B'C'D '). The buffer area (602) is a rectangular ABCD (or A'B'C ').
D ′) and a rectangle EFGH. Invariant area
(603) is an area surrounded by the rectangle EFGH and the rectangle HIJK. The rectangle ABCD is the enlargement area (601) before enlargement.
And a buffer area (602). Rectangle A '
B'C'D 'is the expansion area (601) and the buffer area after expansion
It is a rectangle indicating the boundary of (602).

Similar to the first embodiment, the map image conversion process stores the map image before conversion in the graphic data area 1 (103), and the pixel data is used as a unit to convert the graphic data area 1 (103) from the graphic data area 1 (103). 2 (104) by sequentially copying the pixel values. In the present embodiment, pixel copying is performed by dividing it into a constant area (603), an enlarged area (601) and a buffer area (602). The pixel copying method for each area will be described below.

(A) Copying of Pixel in Invariant Area The pixel value of the pixel in the area surrounded by the rectangle EFGH and the rectangle HIJK is changed from the figure data area 1 (103) to the figure data area 2
Copy to (104) sequentially. In this case, the coordinates of the pixels before conversion and after conversion do not change. That is, the coordinates of the pixel before conversion are (X, Y), and the coordinates of the pixel after conversion are (X ',
Y ′), the pixel is copied with X ′ = X and Y ′ = Y.

(B) Copying Pixels of Enlarged Area In the case of the enlarged area (601), the pixel value of the area surrounded by the rectangle ABCD before conversion is the area surrounded by the rectangle A'B'C'D 'after conversion. To the pixel of. In this case, the pixel coordinates after conversion are calculated according to the enlargement ratio. For example, when the enlargement ratio is N, the coordinates (X ', Y') of the converted pixel are (NX, NY).

(C) Copying of Pixels in Buffer Area In this embodiment, the buffer area before conversion is composed of four quadrilateral (DC).
GH, ADHE, ABFE, BCGF), and the four quadrilaterals (D'C'GH, A'D'H) after conversion
E, A'B'FE, B'C'GF), and pixel copying is performed for each quadrilateral.

FIG. 19 shows an explanatory diagram of pixel copying when the shape of the region is a quadrangle, and FIG. 20 shows a flowchart of the processing. The copy source is an area surrounded by four points A1 to A4. The copy destination is an area surrounded by four points B1 to B4. These regions are arbitrary quadrilaterals. Extract the pixel of point A of the copy source and point B of the copy destination
To copy. u and v are parameters, and by varying these parameters in the range of 0 to 1.0, the copy source and copy destination areas are scanned throughout. This operation will be further described. By changing u from 0 to 1.0, the copy source points A ′ and A ″ are changed from points A1 and A2 to A
4, move toward A3. This gives a straight line A '
A ″ moves from the straight line A1A2 to A4A3. Further, the point A is a point on the straight line A′A ″, which coincides with the A ′ point when v = 0, and moves in the direction of A ″ as v increases. , V =
It reaches A ″ at 1.0. In this case, u, v
The coordinate of the point A with the parameter is expressed by (Equation 3).

[0034]

X = A _1x + v (A _2x −A _1x ) + u (A _4x −A _1x ) + uv (A _3x −A _2x −A _4x + A _1x ) Y = A _1y + v (A _2y −A _1y ) + u ( _A4y - _A1y ) + uv ( _A3y - _A2y - _A4y + _A1y ) X '= _B1x + v ( _B2x - _B1x ) + u ( _B4x - _B1x ) + uv ( _B3x - _B2x- B) the _{4x + B 1x) Y '=} B 1y + v (B 2y -B 1y) + u (B 4y -B 1y) + uv (B 3y -B 2y -B 4y + B 1y) ‥‥‥‥‥ ( number 3) 20 The flowchart of this scanning is shown. First, u is initialized to 0 (step 1801). This u is 1.0
The following scanning is repeated until it becomes (step 180
2). Next, v is initialized to 0 (step 180).
3). The following processing is further repeated until v becomes 1.0 (step 1804).

When v becomes 1.0, the increment of Δu is added to u (step 1810). The following processing is performed in the innermost loop. The coordinates X and Y of the point A are calculated (step 1805). Pixels are extracted from the copy source (step 1806). Next, the coordinates X ', Y'of the point B are calculated according to (Equation 3) (step 1807). Pixels are written in the copy destination (step 1808). Then v
Is incremented by Δv (step 1809). When both u and v become 1.0, copying is completed. By the above processing, the conversion processing of each area of the map image is realized.

2.3 Expansion of this Embodiment This embodiment can be expanded as follows by simple modification. (1) In this embodiment, as shown in FIG. 18, the buffer area (602)
Although the change of the reduction ratio is simple, the buffer area (602) is changed as illustrated in 2.2 (3) (c) of this embodiment.
The map image can be deformed even when the shape is an arbitrary quadrilateral, and the present invention can be applied even when the reduction ratio of the buffer area (602) changes intricately as shown in FIG. In FIG. 21, A11 to A55 and B11 to B55 are subdivisions of the buffer area (602), and the enlarged area Bij is an area corresponding to the area Aij before the enlargement. Where i and j are subdivided buffer areas
It is a subscript of (602).

22 to 28 show an example of division of the buffer area in this expanded example. As shown in FIG. 22, the enlargement area ABCD before enlargement and the boundary EFGH between the buffer area and the invariant area are designated. Next, the enlarged area A'B'C'D 'after enlargement is input. Further, in order to subdivide the inside of the buffer area before expansion, areas M1M2M3M4 are input as shown in FIG. Next, as shown in FIG. 25, the expanded area charges M1′M2′M3′M4 ′ corresponding to the area M1M2M3M4 are input. Further, in order to subdivide the buffer area before expansion, points P1 to P24 are designated. By connecting these points, the buffer area is subdivided as shown in FIG. Further, as shown in FIG. 27, points P17 ′, P18 ′, P19 ′, P20 ′, and P2 are formed in order to further subdivide the expanded buffer region.
Input 1 ', P22', P23 ', P24'. Further, as shown in FIG. 27, (P17'-A '), (P18'
-B '), (P19'-P6), (P20'-P7),
(P21'-C) ', (P22'-D'), (P23 '
-P14) and (P24'-P15) are connected to each other to subdivide the enlarged buffer region. By connecting the points specified above as shown in FIG. 28, the subdivision of the buffer area is completed. The buffer region subdivided in this way is, as shown in FIG.
The area Aij before the enlargement corresponds to the area Bij after the enlargement. Example 2.2 for each of these subdivided regions
The deformation process can be performed by the item (C) and the pixel copy of the buffer area shown in FIGS.

(2) The present embodiment can be further expanded and applied not only to a plane but also to a three-dimensional curved surface such as holography. FIG. 29 shows an example of extension to the three-dimensional aspect.
29A shows the state before the enlargement, and FIG. 29B shows the state after the enlargement. Here, it is assumed that the value in the z-axis direction depends on x and y, and the three-dimensional surface is z = f (x, y).
The expression is different. FIG. 30 shows an expression of the three-dimensional aspect in this way. In FIG. 30,
The value of the function f (x, y) calculated according to the (x, y) coordinates is the value in the z-axis direction. The z coordinate is determined corresponding to each point on the xy plane, and a three-dimensional plane as shown in FIG. 30 is drawn as a whole. Therefore, application of the present invention to such a three-dimensional aspect will be described below. In order to simplify the description, a case where an enlarged area, a buffer area, and a constant area are provided on the xy plane will be described. Here, the rectangular area as shown in the second embodiment is provided. As shown in FIG. 31, the enlargement area before enlargement, the buffer area, and the invariant area are set on the xy plane. Further, as shown in FIG. 32, the enlarged area after enlargement is set. By the same processing as in the second embodiment, a point P'on the x'-y 'plane corresponding to a point P (x, y) on the xy plane.
Calculate the coordinates of (x'y '). And z '= z = f
As (x, y), the point Q (x,
The point Q ′ (x ′, on the three-dimensional coordinate after expanding y, z)
y ′, z ′) is used to realize the expansion of the three-dimensional phase. FIG. 33 shows the result of the expansion to the three-dimensional phase performed in this way. In FIG. 33, the area of the three-dimensional aspect corresponding to the enlarged area A′B′C′D ′ designated on the xy plane is indicated by diagonal lines. As described above, the present invention can be easily extended to the three-dimensional aspect.

(3) The size of the buffer area (602) is shown in FIG.
If the value is set to be extremely small, the details of the graphic in the buffer area cannot be determined, but it is also possible to display only the existence of the graphic such as a house frame. In the case of FIG. 34, the house Kawaguchi is displayed in a small size after the expansion area (601) is expanded, and the name of the house Kawaguchi cannot be identified. However, the existence of a house is identifiable.

Although only the image map has been described in detail in the embodiments described in the present specification, the present invention is also applicable to a vector map.

[0041]

As described above, according to the present invention, a part of a drawing such as a map or a layout drawing is enlarged and displayed,
At the same time, in a system that displays the whole picture. While maintaining the adjacency relationship between the enlarged part of the figure and its surroundings, eliminating the disappearance of the periphery of the enlarged part due to enlargement of the figure, realizing a display that maintains the continuity of the figure accompanying enlarged display It becomes possible to do.

[Brief description of drawings]

FIG. 1 is a diagram showing a software structure and a data structure.

FIG. 2 is a diagram showing a configuration of a system.

FIG. 3 is a diagram showing an example of an overall image of a map.

FIG. 4 is a diagram showing a first example of a conventional enlarged display.

FIG. 5 is a diagram showing a second example of conventional enlarged display.

FIG. 6 is a diagram for explaining a region.

FIG. 7 is a diagram illustrating an enlarged display example of the first embodiment.

FIG. 8 is a diagram showing a flowchart of an overall control unit.

FIG. 9 is a diagram showing a flow of enlarged display according to the first embodiment.

FIG. 10 is a diagram for explaining an outline of conversion processing.

FIG. 11 is a diagram for explaining coordinates of conversion processing.

FIG. 12 is a diagram showing a flowchart of conversion processing.

FIG. 13 is a diagram showing an example of expansion to a closed figure according to the first embodiment.

FIG. 14 is a diagram showing a flow chart of conversion processing when extended to a closed figure.

FIG. 15 is a diagram showing an example 1 showing expansion of an r-r ′ relationship.

FIG. 16 is a diagram showing an example 2 showing expansion of an r-r ′ relationship.

FIG. 17 is a diagram showing an example 3 showing expansion of the relation r−r ′.

FIG. 18 is a diagram showing a display example of the second embodiment.

FIG. 19 is a diagram for explaining a case where the shape of the buffer area is a quadrangle.

FIG. 20 is a diagram showing a flowchart when the shape of the buffer area is a quadrangle.

FIG. 21 is a diagram showing an expansion example 1 (complexing of the shape of the buffer region) of the second embodiment.

FIG. 22 is a diagram showing enlargement region setting (complication of shape of buffer region) after enlargement.

FIG. 23 is a diagram showing enlargement region setting (complication of shape of buffer region) after enlargement.

FIG. 24 is a diagram showing a step 1 of dividing a buffer area before enlargement (complexing the shape of the buffer area).

FIG. 25 is a diagram showing a step 1 of dividing the buffer area after enlargement (complexing the shape of the buffer area).

FIG. 26 is a diagram showing a step 2 of dividing the buffer area before enlargement (complexing the shape of the buffer area).

FIG. 27 is a diagram showing a step 2 of dividing the buffer area after enlargement (complexing the shape of the buffer area).

FIG. 28 is a diagram showing a step 3 of dividing the buffer area after enlargement (complexing the shape of the buffer area).

FIG. 29 is an extended example 2 of the second embodiment (application to a three-dimensional aspect).
FIG.

FIG. 30 is a diagram showing representation of a three-dimensional aspect (application to the three-dimensional aspect).

FIG. 31 is a diagram showing setting of a region before enlargement and points of three-dimensional coordinates (application to a three-dimensional aspect).

FIG. 32 is a diagram showing setting of an area after enlargement and points of three-dimensional coordinates (application to a three-dimensional aspect).

FIG. 33 is a diagram showing an example of a three-dimensional aspect after enlargement (application to a three-dimensional aspect).

FIG. 34 is an example 3 of expansion of Example 2 (example of minimizing the buffer area).
FIG.

[Explanation of symbols]

 101 Graphic Processing Section 102 Device Control Section 103 Graphic Data Area 1 104 Graphic Data Area 2 110 Overall Control Section 111 Enlargement Target Area Setting Section 112 Expanded Area Setting Section 113 Buffer Area Setting Section 114 Area Deformation Processing Section 115 Area Management Information Area 120 Display control unit 121 Secondary storage device control unit 122 Coordinate input unit 123 Keyboard input control unit 124 Image input unit 125 Image printing unit 201 Memory 202 CPU 203 Display circuit 204 Computer body 205 Coordinate input device 206 Image input device 207 Image printer 208 Display Device 209 Keyboard 210 Secondary storage device 601 Expanded area 602 Buffer area 603 Invariant area 604 Expanded area boundary 605 Buffer area boundary

Claims (6)

[Claims] 1. A drawing processing system including a processing device having a coordinate input device, an image input device, a secondary storage device, a display device, a keyboard, and a main storage device, wherein the processing device is an input device. A means for setting the enlargement target area, the enlargement area, and the buffer area, respectively, based on the area management information that specifies the enlargement target area, the enlargement area, and the buffer area input to the drawing data. Outside the expanded buffer area corresponding to the point inside the expanded area corresponding to the point, the coordinate value of the point inside the expanded buffer area corresponding to the point inside the buffer area, and the point outside the buffer area The coordinate value of the point in the area of is obtained, and the pixel value of the point in the enlargement target area, the pixel value of the point in the buffer area, and the pixel value of the point in the area outside the buffer area are set as the coordinates of the corresponding enlarged point. Equipped with means for copying, A drawing processing system, characterized in that the continuity between the enlarged portion and the peripheral portion of the drawing is maintained and the periphery of the enlarged portion can be seen as the drawing is enlarged. 2. The drawing processing system according to claim 1, wherein the shape of the enlargement target area, the enlarged area and the buffer area is a circle, and the coordinates are polar coordinates. 3. The drawing processing system according to claim 1, wherein the shapes of the enlargement target area, the enlarged area, and the buffer area are arbitrary closed figures, and the coordinates are polar coordinates. 4. The drawing processing system according to claim 2 or 3, wherein the coordinates are polar coordinates, and a radius value of polar coordinates of a point in the expanded buffer area corresponding to a point in the buffer area is obtained. A drawing processing system, wherein a function having a radius value of a point in the buffer area as a variable is used, and the function is a continuous and monotonically increasing function. 5. The drawing processing system according to claim 1, wherein the processing device divides the buffer area into a plurality of areas,
For each of the divided areas, the coordinate values of the points in the enlarged divided area corresponding to the points in the divided area are obtained, and the pixel values of the points in each of the divided areas respectively correspond to the corresponding points in each of the enlarged areas. A drawing processing system comprising means for copying the coordinates of the drawing. 6. A drawing processing system for a drawing comprising a three-dimensional curved surface, comprising a processing device having a coordinate input device, an image input device, a secondary storage device, a display device, a keyboard, and a main storage device, The processing device is based on the area management information that specifies the enlargement target area, the enlargement area, and the buffer area on the PQ plane input by the user with respect to the input three-dimensional (P, Q, R) drawing data. Means for respectively setting the enlargement target area, the enlargement area, and the buffer area on the PQ plane, and the coordinate values (P ′, Q ′) of the points in the enlargement area corresponding to the points in the enlargement area, the buffer Coordinate values (P ', Q') of points in the expanded buffer area corresponding to points in the area and coordinate values of points in the area outside the expanded buffer area corresponding to points in the area outside the buffer area ( P ', Q'), and 3D before expansion based on the drawing data R of the point (P, Q, R) on the mark and R ′ of the point (P ′, Q ′, R ′) on the three-dimensional coordinate after enlargement are set to R = R ′ and the three-dimensional coordinate before enlargement. The point (P, Q, R) is replaced with the point (P ', Q', R ') on the three-dimensional coordinate after expansion, and the point (P, Q, R) on the three-dimensional coordinate before expansion is processed. A means for copying the pixel value to the point (P ', Q', R ') on the three-dimensional coordinate after enlargement is provided to maintain the continuity of the enlarged portion of the figure and its surroundings, and A drawing processing system characterized in that the periphery of the enlarged portion can be seen along with the enlargement.