JP3283367B2 - Periscope video display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submarine training apparatus and a game machine for simulating and displaying a periscope image of a submarine.

[0002]

2. Description of the Related Art Conventionally, a periscope image simulation display device is shown in FIG.
As shown in (a), a video signal generator (CGI) 21
And a display device 22 for inputting a video signal generated therefrom and displaying a video, and a peephole 23 for viewing the video as an image from a periscope.

In a video signal generator 21, an original picture (FIG.
The video signal processing of (b)) is performed digitally and output as a video signal 25. The display device 22 receives the video signal 25 as an input and displays a video (FIG. 2C) on a display surface. The observer 24 looks at the image (FIG. 2C) on the display surface of the display device 22 through the peephole 23.

[0004]

Since the conventional periscope simulated display device is constructed as described above, a high resolution similar to the resolution of human eyes is required to visually recognize a distant ship or the like on the ocean. The video signal generating device and the display device were required. However, a high-resolution video signal generating device and a display device are expensive, and there are technical limitations on a display device that can display even the resolution of human eyes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and displays a distant ship or the like without deteriorating high resolution.
It is an object of the present invention to provide an inexpensive periscope simulated display device capable of performing training for identifying the posture of a target and the type of the target.

[0006]

A periscope simulated display device according to the present invention for solving the above-mentioned problems comprises a video signal generating device for generating a video signal, and a display device for inputting the video signal and displaying a video. And The video signal generation device is provided with image conversion means for generating a video signal in which a vertical central portion of a display image is vertically enlarged, and an image inverse conversion optical device for reducing a central portion of the image displayed on the display device. It is provided in front of the display device.

Here, the video signal generator may obtain image data by computer graphics, and the image conversion means may perform non-linear coordinate conversion on the image data, or use a television camera. Then, the objective lens may form an image such that the central portion in the vertical direction is enlarged in the vertical direction, and reproduce the video signal.

Further, as an image reverse conversion optical device, the light is reflected by a distorted reflecting mirror or a distorted prism having a distorted reflecting surface.
Alternatively, the image can be shown by being transmitted through a distortion lens.

[0009]

The periscope image display device configured as described above is
It works as follows.

In the video signal from the video signal generator, the center of the display image in the vertical direction is expanded in the vertical direction by the image conversion means, and the upper and lower ends are reduced. The signal whose vertical direction is enlarged or reduced is an image signal obtained by scanning the signal at regular intervals. The image inverse conversion optical device reduces the center of the image displayed on the display device in reverse to the conversion by the image conversion means. For this reason, many scanning lines are included near the center, and the resolution is higher. The part with the increased resolution is the part that the human gazes at, that is, the central part of the screen that simulates the vicinity of the horizontal line seen from the periscope, while the part that the human does not gaze at even if the vertical resolution is lowered Because
Put into practical use.

[0011]

[First Embodiment] An embodiment of a periscope simulated display device according to the present invention will be described below with reference to the drawings.

Before describing the embodiments, the resolution of the human eye and the field of view of the periscope will be described.

The resolution of the human eye is the fovea (center of the retina)
As shown in FIG. 3, a portion having a high resolution is limited to a very narrow field of view.

The periscope can be switched at several magnifications, but as shown in FIG.
Is always constant, for example, about 50 °.

An operation method of a periscope for finding and identifying a distant ship will be described. At first, look at the vicinity of the horizon in the horizontal direction at low magnification, and if even a very small point is found, watch that point and switch to high magnification to confirm and identify the found object. As described above, although the vertical viewing angle of the periscope is wide, the observer gazes only near the horizontal line. In addition, the attitude of the submarine when operating the periscope is not inclined, and therefore, the horizontal line is located horizontally at the center of the periscope in the vertical direction.

According to the present invention, in consideration of the operation of the periscope, the resolution near the horizontal line, that is, the center in the vertical direction of the display image is increased. Considering this, the resolution has been reduced to make it suitable for operation of the periscope.

FIG. 1A is a block diagram of an embodiment of a periscope simulated display device, wherein 1 is a video signal generator, 2 is a non-linear coordinate conversion means in the video signal generator 1, and 3 is a display. Apparatus, 4 is a distortion reflection mirror constituting an image inversion optical apparatus, 5
A viewing hole, 6 is an observer, 7 is a controller, and 11 is a video signal converter. FIGS. 1B to 1E are diagrams for explaining signals or images of each unit.

The video signal generator (CGI) 1 digitally performs video signal processing by a computer graphics technique to obtain an image signal (before the non-linear coordinate conversion (NL) processing shown in FIG. 1B). Shape). The non-linear coordinate conversion means 2 converts the image signal into an image signal distorted in the vertical direction by vertically expanding a central portion in the vertical direction of the screen by a non-linear processing and compressing the image signal in the upper and lower end portions of the screen in reverse. (FIG. 1 (c)). This image signal is converted into a video signal by the video signal converter 11 (FIG. 1).
(D) graphic image).

The display device 3 is constituted by a CRT, and displays an image (FIG. 1 (d)) on a display surface by using the video signal as an input. This image (FIG. 1D) is an image that is processed by the non-linear coordinate conversion means 2 of the image signal generating device 1 and is distorted in the vertical direction.

The light of the display image of the display device 3 is reflected by the distortion reflection mirror 4 and reaches the eyes of the observer 6 through the observation hole 5 to form an image on the retina. At this time, the distortion reflecting mirror 4 is formed by a convex mirror so as to reduce a display image of the display device 3. The radius of curvature of the central portion is reduced so that the degree of reduction of the central portion is increased, and the radius of curvature is increased so that the degree of reduction of the peripheral portion is reduced.

As a result, the image viewed by the observer 6 is a figure (FIG. 1) before the non-linear processing generated by the image signal generator 1.
FIG. 1E shows the same figure as FIG. The graphic whose central part is reduced (FIG. 1E) is the original graphic (FIG. 1E).
(B)) The central portion is enlarged and displayed in detail, scanned at equal intervals, displayed on the display device 3, and optically reduced by the distortion reflecting mirror 4, so that the central portion is scanned. High density and therefore high resolution. Note that the left and right fine parallel lines shown in FIGS. 1D and 1E represent horizontal scanning lines.

[0022]

Second Embodiment In the first embodiment, the video signal generator 1 creates computer graphics by digital processing. However, in the second embodiment, as shown in FIG. 61 is used. The objective lens 62 of the television camera 61 forms an image on the image sensor so as to enlarge the central portion in the vertical direction in the vertical direction. This video signal can be recorded in the storage device 63 in advance, reproduced at the time of operation under the control of the controller 7, and an image corresponding to the operation of the periscope of the observer 6 can be displayed. The observer 6 can see the image of the display device 3 whose central portion has been reduced by the distortion reflecting mirror 4 or an image reverse conversion optical device (distortion lens, distortion prism) to be described later, similarly to the first embodiment.

[0023]

Third Embodiment As an image reverse conversion optical device for reducing the central portion of a display image, it can be realized by disposing a distortion lens 71 near the display surface of the display device 3 as shown in FIG. The display device 3 is the same as that of the first embodiment.
A figure as shown in (d) is displayed. The distortion lens 71 reduces the central part of the displayed figure (FIG.
It looks like the original figure like (e).

[0024]

Fourth Embodiment A distortion prism 91 having a reflecting surface distorted as shown in FIG. 7 is used as an image inversion optical device for reducing the central portion of a display image, and the distortion reflecting mirror 4 of the first embodiment is used. The same operation as described above can be performed. On the display surface of the display device 3, similarly to the first embodiment, the graphic of FIG. 1B is converted into the FIG. 1C by the operation of the image signal generating device 1 and the non-linear coordinate conversion means 2. It is displayed as shown in FIG. The distortion prism 91 reflects light rays from the incident surface in the same manner as the distortion reflection mirror 4 of the first embodiment, and increases the degree of reduction at the center,
An image is formed at a predetermined position by reducing the degree of reduction of the edge.

[0025]

[Other Embodiments] Although a display device using a CRT has been described as an example of a display device, a liquid crystal display device may be used. In addition, although a viewing hole is provided for limiting the viewpoint of the observer 6, it may be replaced by an eyepiece.

[0026]

As described above, according to the present invention, the display image is enlarged vertically only at the upper and lower centers, and is optically reduced only at the center after being displayed on the display device. The resolution at the center in the vertical direction can be increased. As a result, the resolution near the horizon, which is important for submarine training, is increased, and a periscope image display device capable of effectively performing training for finding and identifying distant ships and the like can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional periscope image display device.

FIG. 3 is a diagram illustrating the resolution of human eyes.

FIG. 4 is a diagram illustrating a field of view of a periscope.

FIG. 5 is a main part configuration diagram for explaining a second embodiment of the present invention.

FIG. 6 is a main part configuration diagram for explaining a third embodiment of the present invention.

FIG. 7 is a main part configuration diagram for explaining a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Video signal generator 2 ... Non-linear coordinate conversion means 3 ... Display device 4 ... Distorted reflecting mirror 5 ... Peephole 6 ... Observer 61 ... Television camera 62 ... Objective lens 63 ... Storage device 71: Distorted lens 91: Distorted prism 11: Video signal converter

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G09B 9/00-9/56 A63F 9/00-13/12 G06T 17/40 H04N 7/18

Claims (6)

(57) [Claims] 1. A periscope video display device comprising: a video signal generation device for generating a video signal; and a display device for inputting the video signal and displaying a video, wherein the video signal generation device is provided in a vertical direction of a display image. Image conversion means for generating a video signal having a central portion enlarged in a vertical direction, and an image reverse conversion optical device for reducing a central portion of an image displayed on the display device is provided in front of the display device. Periscope image display device. 2. A periscope video display according to claim 1, wherein said video signal generating device obtains image data by computer graphics, and said image conversion means performs non-linear coordinate conversion on said image data. apparatus. 3. A video signal generator for reproducing a video signal from a television camera provided with an objective lens for forming an image in such a manner that a vertical central portion is enlarged in a vertical direction. The periscope image display device according to claim 1. 4. The periscope image display device according to claim 1, wherein the image reverse conversion optical device is a distortion reflection mirror. 5. The periscope image display device according to claim 1, wherein the image reverse conversion optical device is a distortion lens. 6. The periscope image display device according to claim 1, wherein the image reverse conversion optical device is a distortion prism whose reflection surface is distorted.