JPH03139072A - Method and device for displaying image - Google Patents

Abstract

PURPOSE:To express pickup image of the whole periphery in one display section by storing temporarily the pickup image of the whole periphery obtained from an image device for rotating at a constant speed and executing a coordinate transformation. CONSTITUTION:An image of the whole periphery brought to image pickup by an image pickup device 1 is inputted to an input image memory part 4 by synchronizing with a rotation of the device 1, and stored temporarily by allowing a memory address of the memory part 4 and an elevation angle and an azimuth of the image to correspond to each other. Subsequently, in a coordinate transformation part 5, an elevation angle and an azimuth of the image brought to image pickup are converted to a display position signal on a display monitor 7 by a prescribed operation, and stored in a display image memory part 6. A monitor 7 reads out the pickup image of the whole periphery stored in the memory part 6 at a timing of display, and displays it. In such a way, the pickup image of the whole periphery can be expressed in one display section.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an image display method and its equipment for expressing the entire circumference imaged on one display screen at a time in a one-picture-one-image display system. It is related to

[Conventional technology]

FIG. 4 shows an example of a configuration in which a landscape is imaged using a two-image imaging device and an image display device, and one image is displayed.

FIG. 5 is a diagram showing an example of display in a conventional image display method and apparatus.

In the figure, (1) is an image capturing device that captures landscapes, etc., +2) is an image display device that displays the scenery captured by image capturing device (1), and (3) is image display device #(2).
on the display screen, AZ is the azimuth angle, and KL is the elevation angle.

As mentioned above, the conventional image display method displays an image captured by the image capturing device (1) K having a certain viewing angle as it is on the display screen (3) of the image display device (2). There is.

Figure 6 shows an image capturing device (1) with a certain viewing angle.
This figure shows an example of a display when rotating clockwise at a certain speed and capturing images of the entire surrounding area.

In the figure, (3) is the same as that shown in FIG. 5, E is a display screen of scenery facing east, S is a display screen of scenery looking south, and W is a display screen of scenery looking west.

The display screen showing the scenery in the north direction of NFi, the arrows indicate the transition of the display screen.

As shown in FIG. 6, in the conventional display method and device, two images are rotated at the same speed as the image capture device (1).

The captured image is displayed on the display screen (3) of the image display device (2)
The display moves from the right to the bottom in a flowing manner.

[Problem to be solved by the invention]

In an image display system that rotates an image capturing device with a certain viewing angle at a certain speed to capture and display images of the entire surrounding area, two images are rotated from the right at the same speed as the image capturing device rotates. left.

Or, when the display moves smoothly from left to right, and the rotation speed of the two-image imaging device is fast, the display changes quickly, making it very difficult to see, and it is difficult to see the entire surrounding situation at a glance. 1 It is difficult to determine which direction the displayed scenery is from.

Furthermore, in order to display captured images of the entire surrounding area on one display screen in one night, the conventional image display methods and devices described above require a special display monitor that is long in the horizontal direction (AZ direction). Become. but.

The display monitor of conventional image display devices has an aspect ratio of 4:3.
is common, and it is difficult to prepare a special display monitor that is long in the horizontal direction.

The present invention was made in order to solve the above problem, and provides an image display method and apparatus for displaying an entire area of captured images on one display screen at a time.

[Means to solve the problem]

Picture I'J related to this invention! The display method is to set the image capturing device at a low elevation angle such that the center of the circular display area is placed at a low elevation angle.
The high elevation angle is the circumference of the circular display area.

The distance from the center of the circular display area to the circumference is proportional to the elevation angle, and the circumferential direction of the circular display area is taken as the azimuth, and the center of the circular display area and the point within the display area are A straight line connecting one point.

The angle it makes with a straight line that indicates an azimuth angle of 0 degrees constitutes a polar coordinate system that indicates the azimuth of that one point.

Image display device 2 according to the present invention: an input double peak memory section for inputting the all-around image captured by the image capturing device and temporarily storing the all-around image, and an elevation angle from the center of the circular display area to the first part of the circle; Convert the azimuth to 5iIII@ and 3 values, and use these converted distances, sin values and 3
A coordinate conversion unit calculates the value obtained by Makoto so that it corresponds to a new memory address, and stores the all-around image temporarily stored in the input artist memory in the memory address calculated by the coordinate conversion unit. [Function] This invention is equipped with a display image memory unit that reads out and displays the all-around image stored in the display image memory unit at the display timing. One image of the entire circumference obtained from an image capturing device that rotates at a high speed is temporarily stored, and coordinate transformation is performed on the captured image that is stored at that time. can be expressed within one display screen.

〔Example〕

FIG. 1 is a diagram showing an image display method according to the present invention.

In the figure, AZ and EL are the same as those shown in Figure 5, A is a circular display area, B is the center of display area A, &1 to a12 are points from center A to the circumference of display area A. This is a virtual straight line drawn radially.

The image display method of the present invention is to take a width image of the center A of the two circular display areas A (with a low elevation angle at the installation position of the elephant behavior and set the circumferential part of the two circular display areas A at a high elevation angle). The distance from the center A to the circumference is proportional to the elevation angle KL, and the upper side of the two circular display areas A is the azimuth angle of 0 degrees, that is, the north of the azimuth, and the bottom 18 is the azimuth of -210 degrees, that is, the south of the azimuth. .

Azimuth 90I on the right! That is, the azimuth is east, and the left side is azimuth 27Gfi, that is, the azimuth is west, and the azimuth Q +
Virtual straight lines a1 and 2 of f A virtual i connecting a certain point in the circular display area A and the center A of the circular display area A
'i! The angle formed with 44 constitutes a polar reference system indicating the direction of that one point, and the entire circumference image captured by the two-image imaging device is expressed in one display screen. It is.

Second, it is a diagram showing an embodiment of an image display device for realizing the image display method of the present invention.

In the figure, Ill and f2+ are the same as those shown in FIG.
and an input image memory unit that stores the all-around image so that the azimuth angle AZ corresponds to the address of the memory.

[5) The elevation angle EL is the center (a) of the circular display area (7)
Convert the azimuth angle AZ to the distance from and (6) stores the entire circumference F@儂 stored in the input double image memory 14) in the memory address calculated by the above 1=% W conversion section (5). A display image memory section (7) is a display monitor that reads out and displays the all-around image stored in the display image memory section (6) at the display timing.

The operation of the image display device configured as shown in FIG. 2 will be described.

An image of the entire surrounding area captured by the image capturing device fil.

Input image memory 14) Inputs in synchronization with the rotation of the K image imaging device (ri) and stores it at - time.
4) Memory address and painter's elevation angle KL and azimuth angle AZ
We are trying to accommodate this. The coordinate conversion unit (5) calculates display position signals X and Y on one display monitor (7) using the following equations based on the elevation angle KL and azimuth angle AZ of the captured image.

X=K*WL*5inAZ-fil
Y =K −KL IIcosAZ −= (
2) Here, is a scale constant representing the relationship between the elevation angle KL and the distance within the display area (7). Input image [l! The surface image of the elevation angle EL and azimuth angle AZ stored in the memory (4) is read out, and the display image memory unit ( 6)
is memorized.

A fully bright captured image stored in the display monitor (71Fi display image memory section (6)) is read out and displayed once at the display timing.

FIG. 3 shows an example in which the omnidirectional image conventionally displayed as shown in FIG. 6 is displayed using the image display method according to the present invention.

In the figure, (3) is similar to that shown in FIG.

〔Effect of the invention〕

As described above, by carrying out the present invention, the image of the entire surrounding area captured by the image capturing device that rotates once is displayed on one display screen at a time. becomes easier to see.

Directions can also be determined easily.

In addition, with conventional display methods, a special display monitor that is long in the horizontal direction was required to display images all around at once, but by implementing this invention, a special display monitor can be prepared. There will be no need.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an image display method according to the present invention. 94IJ2 is a block diagram showing an embodiment of the dual image display=it according to the present invention, FIG. 3 is a diagram showing an example of displaying full circumference dual images by the image display method according to the present invention, and FIG. A diagram showing a configuration for capturing and displaying an image by an image display device, FIG. 5 is a diagram showing a display example using the conventional image display method, and FIG. It is a figure showing an example of a display. In the figure, [l] is a bimodal imaging device, and (2) is an image display method. 13) is the display screen, 14) is the input image memory section, (5)
is a coordinate conversion section, (6) is a display 1iii image memory section,
(7) is a display monitor. AZ is the azimuth angle, and EL is the elevation angle. Note that in Figure 2, identical or corresponding parts are indicated with the same symbol.

Claims (2)

[Claims] (1) In an image display method in an image display system that rotates an image capturing device having a certain viewing angle at a certain speed to capture and display images of the entire surrounding area,
The center of the circular display area is the low elevation angle at the installation position of the image capturing device, and the circumferential part of the circular display area is the high elevation angle, and the distance from the center of the circular display area to the circumferential part is proportional to the elevation angle. and, with the circumferential direction of the circular display area as the azimuth angle, a virtual straight line connecting the center of the circular display area and a certain point within the display area, and a virtual straight line indicating an azimuth angle of 0 degrees. An image display method in which a corner forms a polar coordinate system in which the direction of a single point is expressed, and images of the entire surrounding area captured by an image capturing device are expressed on one display screen at a time. (2) In an image display device in an image display system that rotates an image capturing device having a certain viewing angle at a certain speed to capture and display images around the entire circumference,
An input image memory unit that inputs the all-around image captured by the image capturing device and stores the all-around image so that the elevation angle and azimuth of the captured image correspond to the address of the memory; Convert the distance from the middle tree to the circumference of the display area, convert the azimuth to a sine value and a cosine value, and store the value obtained from these converted distances, sine value, and cosine value in a new memory. a display image memory section that stores the all-around image stored in the input image memory at the memory address calculated by the coordinate conversion section; An image display device comprising: a display monitor that reads and displays an all-around image stored in a display image memory section at display timing.