JPH05249887A - Picture display device - Google Patents

Abstract

PURPOSE:To provide a picture display device by which a desired enlarged screen can be easily searched for by scrolling. CONSTITUTION:When an optional range is instructed from a center on the screen (step b), the screen whose range is wider than the screen scrolled with respect to all directions is indicated within the range thereof by a window (step c) When the optional position of the frame of the window is instructed from such a state (step d), the screen which is scrolled is moved toward the direction of the instructed position from the center on the screen (step e).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device for enlarging and displaying while scrolling only a specific portion of graphic information such as map information.

[0002]

2. Description of the Related Art Generally, in an image display device for displaying vast and detailed graphic information such as map information on a screen, a function of extracting a specific portion and enlarging the specific portion is used to display details of the specific portion. You can do it.

By the way, in the case of enlarging and displaying only a specific portion in this way, if the screen is continuously moved by scrolling, a desired screen can be quickly found in relation to the displayed screen and the operation can be performed. It is also convenient in terms.
Therefore, this type of image display device has conventionally been provided with a function of moving an enlarged and displayed image in a desired direction by scrolling.

However, when the enlargement ratio is considerably large, or when similar figures are continuous,
It becomes difficult to find a desired screen even if the screen is moved by scrolling, because the current positioning and surroundings of the entire figure are unknown, and it takes a considerable amount of time for the search.

[0005]

As described above, in the conventional image display device for enlarging and displaying only a specific portion of the vast and detailed graphic information such as map information by scrolling, the enlarging magnification is considerably large. However, it is difficult to find a desired screen, and it takes a considerable amount of time to perform the search.

The present invention has been made under the above circumstances, and an object thereof is to provide an image display device capable of easily finding a desired enlarged screen by scrolling.

[0007]

According to the present invention, in order to achieve the above-mentioned object, a specific portion of image data is enlarged and displayed on a screen, and the enlarged screen can be moved by scrolling. In the image display device, the first instruction means for instructing an arbitrary range from the center on the screen on the screen, and the instructed range excluding a predetermined range from the center on the screen, Window display means for displaying a window whose screen has a center which is coincident with that of the scrolled screen and which has a smaller magnification than the scrolled screen; second instructing means for instructing an arbitrary position of the frame of the window; Scroll screen moving means for moving the scrolled screen from the upper center in the direction of the instructed position.

[0008]

According to the present invention, when an arbitrary range is specified from the center of the screen, it is smaller than the scrolled screen within the specified range except the predetermined range from the center of the screen, that is, in all directions. A window displays a screen of a magnification ratio, that is, a screen in a wider range than the screen to be scrolled. Therefore, it is possible to clearly grasp the current positioning and the surrounding situation viewed from the whole figure on the screen displayed in this window. After that, when an arbitrary position of the frame of the window is designated, the screen scrolled in the direction of the designated position from the center of the screen is moved, and a desired enlarged screen is searched.

[0009]

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

FIG. 2 is a diagram showing the configuration of an image display device according to an embodiment of the present invention.

In the figure, 1 is an image data storage unit for storing map data, 2 is an image processing unit for performing various kinds of image processing, 3 is a screen display unit such as a CRT for displaying a processed screen, and 4 is the relevant unit. An instruction input unit such as a mouse for inputting various instruction commands to the device. The image data storage unit 1 includes a first image memory 1a that stores the entire map data, a second image memory 1b that stores data obtained by enlarging a specific portion of the map data and that is used for scroll display, and a second image memory 1b. 1
And a third image memory 1c used to display a window for storing data obtained by combining the data stored in the image memory 1a with the data stored in the second screen memory 1b.

The image processing unit 2 enlarges a specific portion of the map data and performs a process of scrolling and displaying the enlarged screen, a scroll processing unit 2a, data stored in the first image memory 1a and a first image memory 1a. 2 screen memory 1
and a window processing unit 2b that executes a process of combining the data stored in b with a window display.

Next, the operation of the image display device thus configured will be described with reference to the process flow shown in FIG. 1 and the screen display states shown in FIGS.

In a normal state, as shown in FIG. 3, a scroll screen in which a specific portion of the map data is enlarged is displayed on the screen display unit 2 (step a).

From this state, when an arbitrary range on the screen from the center O on the screen is specified by the instruction input unit 4 (step b), a predetermined range A from the center O on the screen is displayed as shown in FIG. A window screen whose center coincides with the scroll screen and is not enlarged is displayed on the screen display unit 2 within the instructed range B excluding (step c). That is, FIG.
In the state shown in, the scroll screen is displayed in the range A, the window screen is displayed in the range B, and the scroll screen is displayed outside the range B. The range input by the instruction input unit 4 is performed by, for example, moving the cursor displayed on the screen display unit 2 to a position corresponding to the outer frame of the range B with a mouse and clicking the mouse at that position. You can do this.

From this state, when an arbitrary position D of the frame C of the window screen is instructed by the instruction input unit 4 as shown in FIG. 5 (step d), the position D instructed from the center O on the screen is changed. The scroll screen is moved in the direction (arrow direction in the figure) (step e). The instruction of the position by the instruction input unit 4 may be performed, for example, by bringing the cursor displayed on the screen display unit 2 into contact with the frame C with a mouse.

After that, when there is a predetermined instruction from the instruction input unit 4 (step f), the scroll screen without the window screen is displayed on the screen display unit 2 (step g). That is, the screen returns to the screen shown in FIG.

As described above, the image display device of this embodiment can display a screen in a wider range than the scroll screen in windows in all directions. Therefore, the window screen displays the current position of the entire figure and surroundings. The situation can be clearly understood. Therefore, the desired enlarged screen can be easily searched.

Although the window screen is not enlarged in the above-mentioned embodiment, it may be enlarged if the enlargement ratio is smaller than that of the scroll screen.

In the above-mentioned embodiment, the map data is displayed. However, the present invention is also applied to the case where other graphic data, for example, graphic data relating to a board design drawing or a floor plan design is displayed. be able to.

[0021]

As described above, according to the present invention, since a screen in a wider range than the scroll screen can be displayed in windows in all directions, a desired enlarged screen can be easily searched. it can.

[Brief description of drawings]

FIG. 1 is a processing flow showing an operation of an image display device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an image display device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a display state of a screen by the image display device according to the embodiment of the present invention.

FIG. 4 is a diagram showing a display state of a screen by the image display device according to the embodiment of the present invention.

FIG. 5 is a diagram showing a display state of a screen by the image display device according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Image data storage unit, 1a ... First image memory, 1b
... second image memory, 1c ... third image memory, 2 ... image processing section, 2a ... scroll processing section, 2b ... window processing section, 3 ... screen display section, 4 ... instruction input section.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G09G 5/00 8121-5G 5/14 8121-5G 5/34 8121-5G

Claims (1)

[Claims] 1. An image display device in which a specific portion of image data is enlarged and displayed on a screen, and the enlarged display screen can be moved by scrolling. A first instructing means for instructing an arbitrary range, and an enlargement in which the center coincides with the scrolled screen and is smaller than the scrolled screen within the instructed range excluding a predetermined range from the center on the screen Window display means for displaying a screen of magnification by a window; second instructing means for instructing an arbitrary position of the frame of the window; and scrolling in the direction of the instructed position from the center on the screen. An image display device, comprising: a scroll screen moving means for moving the screen.