JP3503457B2 - Image display system for moving objects - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observing system for observing a traveling direction in a train or the like, and more particularly to a method for enabling display with emphasis on reproduction of the observing at an observation point.

[0002]

2. Description of the Related Art A system has been put into practical use for giving a perspective of a place away from an observer, such as outside a train or outside a plane, on a train or an airplane. In this type of viewing system, a moving image camera is mounted on a train to move as described in, for example, Japanese Patent Application Laid-Open No. 8-228339, "Video transmission type remote viewing device". There is no way to enjoy the train view, just observing from a remote location.

[0003]

In the conventional view system, regardless of the vehicle (portion) on which the observer is riding, the image from the place (usually the head portion) where the video camera for observation is installed is observed. Since it is only displayed in real time, it gives the illusion that the observer himself is moving to that place (the beginning) and observing. Moreover, since the scenery on both sides of the window jumps into the eyes from the left and right windows, there is a problem in that if the observation point is far away from the shooting point, the image will look strange. The object of the present invention is that the observer can obtain an image of the traveling direction that can be seen at the place where the observer is.
Displaying at the timing and speed that you would normally see allows for a more realistic observation.

[0004]

In order to achieve the above object, according to the present invention, a thin display device such as a plasma flat display is arranged at the head portion of a vehicle (place) where an observer is in the traveling direction, and a train is installed. The signal from the video camera installed at the beginning is temporarily stored, then a time delay is added and then the playback speed is controlled and displayed on the display device. The video signal from the video camera is digitized and then temporarily stored in a RAM memory such as a PC or a magnetic disk storage device. Measure the speed of the train with a speedometer attached to the train drive, calculate the timing when the vehicle passes the shooting point, add the time difference, and then play back the temporarily stored video signal and display it To display. The regeneration speed at that time is controlled according to the speed of the train at that time. With this method, even for vehicles other than the front, the same landscape as the front can be reproduced on the display device at the timing when the vehicle passes and the speed at which it passes, so it blends with the scenery flowing through the windows on both sides. You can get the outlook.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a system configuration block diagram of an embodiment of a train view system to which the present invention is applied. In FIG. 1, 10-11
Is a video camera installed at the front of the train,
20 to 25 are fronts of the trains in the traveling direction,
That is, a thin (wall-mountable) plasma flat display (hereinafter referred to as PDP) 30 installed on the surface between the preceding vehicle and 30 is a speedometer capable of measuring the operating speed of the train in real time. Is a clock, 50 is
A computer (hereinafter referred to as a server) having a capture mechanism for converting a video signal and the like into a digital signal and a RAM memory and a magnetic storage device capable of temporarily storing / accumulating the same (hereinafter referred to as a server), 51 to 52 are digital images to be displayed on a PDP. A computer (hereinafter client) that receives and reproduces information, 6
0 is a window installed in each car of the train, each seat, 70
Is a seat.

[0006] FIG. 2 is a connection relation diagram between system configuration blocks. Reference numeral 53 is a RAM memory built in the server 50, and 54 is a magnetic disk storage device built in the server 50. Further, 80 is a signal line connecting the 40 clock and 50 servers, 81 is a signal line connecting the speedometer 30 of the train and the server, and 82 and 83 are
Signal lines connecting the video cameras 10 and 11 to the server 50, 84 is a signal line (hereinafter LAN) connecting the server 50 to the clients 51 and 52, and 90 and 91 are 2
It is a signal line that connects 0 and 21 PDPs and 51 and 52 clients.

The video signals sent from the video cameras 10 and 11 attached to the forefront of the train traveling direction are
It is transmitted to the server 50 in real time through the signal lines 82 and 83. The server 50 stores the acquired video information in the RAM memory 53 or the magnetic disk storage device 54 while converting it into a digital signal. At that time, the time at the time of shooting is timely, through the signal line 80, and the
It is acquired from, and stored while adding time information (time stamp). In addition to this video signal, data obtained by measuring the train operating speed in real time by the speedometer 30 is transmitted to the server 50 through the signal line 81. The server 50 stores the speed information in the RAM memory 53 or the magnetic disk storage device 54 while adding the time stamp as in the case of the video signal.

Next, as shown in FIG. 3, a time T2 at which the scenery in the traveling direction of the leading vehicle photographed at time T1 should be displayed on the PDPs 20 and 21 installed for observation is determined. That is, assuming that the train speed at time t is Vt, the distance S that has traveled between times T1 and T2 is the position where the PDP to be displayed from the video camera installed at the head of the train is installed. It is sufficient to find the time T2 that is equal to the distance L2 up to. From the relationship between time, speed, and distance, the distance S traveled by the train from time T1 to time T2 is equal to the area in FIG. That is, it can be obtained by the following equation.

[0009]

[Equation 1]

Here, the server 50 is T2 that satisfies S = L2.
When the time T2 is reached, the client 51 receives the digital signal of the frame of the moving image captured at the time T1.
52 through the signal line LAN 84, converted into a video signal by the clients 51 and 52, and the signal line 9
It is projected on the display device PDP 20, 21 through 0, 91. This is performed not only at time T1 but also in real time at all times for calculation and display of moving image frames at that time. According to this method, the time when the display device is installed is the timing of passing the shooting point,
Moreover, the scenery in the traveling direction can be displayed according to the speed of the train. For example, even when the train gradually slows down and finally stops, the state in which the frame of the video signal representing the scenery at the position immediately before the speed Vt = 0 is displayed is retained, as if at that point. You can get a view as if you were stopped.

Further, as shown in the flowchart of FIG. 4, the server 50 performs the same processing in real time in parallel for each vehicle in which the display device PDP is installed, so that the leading vehicle ( You will be able to get the same view as the train view in the driver's seat.

According to the present invention, when a train passes or passes through a telephone pole, a tunnel, an oncoming train, or the like, the scenery in the traveling direction can be seen from the image of the PDP installed in front of each vehicle. You can enjoy a realistic train view with the actual scenery from the left and right windows.

Although only six PDPs / clients are shown in the embodiment of the present invention, it is of course possible to consider an example in which more PDPs / clients are connected to the server. For example, it may be installed in each car of a train of 15 cars, or even installed in front of each seat as an application example. Also, the video camera and the PDP that displays it are always shown in pairs.
This number is also just an example, and of course, it is also possible to display an image captured by one video camera on one PDP. It is sufficient if there is at least one video camera and PDP. Also, the video camera / PDP is shown only as a suitable example for performing image acquisition and reproduction in a narrow vehicle, and an alternative device such as (MPEG camera, TV camera, CCD camera, liquid crystal display) Device, liquid crystal projector, TV monitor device, CRT, etc.).

The embodiment of the present invention has been described above.
The field of application of the present invention can be applied not only to train prospects but also to any vehicle or transportation means if conditions are met.

[0015]

As described above, according to the present invention,
Even in a vehicle in the middle of a train where you cannot normally enjoy the scenery in the direction of travel, you can observe the scenery in the direction of travel at the timing and speed at which the vehicle passes that point, as if the vehicle were the first car. You can do it, and by combining it with the actual scenery seen from the windows on both sides, you can enjoy a realistic view.

[Brief description of drawings]

FIG. 1 is a system configuration block diagram showing an embodiment of the present invention.

FIG. 2 is a connection relation diagram between system blocks.

FIG. 3 is a relationship diagram between speed and distance.

FIG. 4 is a flowchart showing a flow of processing in the observation system.

[Explanation of symbols]

10-11 ... Video camera, 20-25 ... Thin PDP, 30 ... Speedometer, 40 ... Clock, 50 ... Server, 51, 52 ... Client, 53 ... RAM memory, 54 ... Magnetic disk storage device, 60 ... Window, 70 ... seats, 80-91 ... signal lines.

Claims (3)

(57) [Claims] 1. A speedometer that measures the speed of a moving object, a video camera that shoots the moving direction of the moving object, and a clock are used to display the progress on the display device included in the moving object. In an image display system for displaying an image in a direction, a first time indicating a time taken by the video camera is acquired from the clock, and the image taken by the video camera is accumulated in association with the first time. Means, each time from the first time measured by the speedometer
Means for storing in association with definitive in time speed and said each of time, the second time position with respect to the traveling direction of the moving object of the display device is moved to a position associated with the image to the storage, the At the first time, each time of the moving object
The speed of the video camera and the distance between the video camera and the display device in the traveling direction, and means for outputting the image captured at the second time to the display device. Image display system for moving objects. 2. The moving object according to claim 1, wherein a plurality of display devices are arranged at different positions in the moving object, and the second time is calculated according to the position of each display device. Image display system in Japan. 3. A video camera for photographing a landscape in the traveling direction of a moving vehicle, a storage device for accumulating the landscape image together with a photographing time at which the landscape was photographed by the video camera, and a display for displaying the landscape image. Device and an image to be displayed on the display device together with the shooting time from the storage device, and the display device installed at a position different from the video camera in the moving direction reaches the position of the video camera at the shooting time. The time
The shooting time, the time at each time from the shooting time
Vehicle speed and the video camera and display device
Calculated based on the distance in the traveling direction of
At a certain time, and a computer that performs control so as to display the photographed image.
Image display system equipped .