JPH04320184A - Video signal processing unit - Google Patents

Abstract

PURPOSE:To store a video image of a moving object and time information at an image pickup point of time of the object with cross reference. CONSTITUTION:The processing unit is provided with a time information generating circuit 26 generating time information DT reset by a supplied trigger signal ST, a slit camera 10 receiving a light L having video information through a slit 5 and outputting a video signal S(DS), and a large capacity memory 22 storing the video signal DS obtained from the slit camera 10 and the time information DT with cross reference. The time information outputted from the time information generating circuit 26 and the video signal S outputted from the slit camera 10 are stored in the large capacity memory 22 with cross reference.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing device suitable for application to, for example, an order of arrival display device.

0002

2. Description of the Related Art Conventionally, a slit camera has been used as an arrival order display device. For example, at racetracks and the like, slit cameras having slits formed parallel to goal posts are installed and used to make decisions when it is impossible to make decisions with the naked eye.

As a conventional slit camera, there is a technique disclosed in Japanese Patent Laid-Open No. 2-84977 that utilizes a silver halide film or a line sensor that is an improved version of the same.

[0004] This technology has a slit camera using a line sensor and an electronic blackboard-like display board having an endless recording board, and the direction of the slit is fixed in a direction perpendicular to the moving direction (plane) of the subject. In addition, the direction of the slit and the length direction of the line sensor are made to match. The direction of the slit and the width direction of the line sensor are perpendicular to each other.

In use, by synchronizing the data output from the line sensor with the display position of the display board, the finishing order of moving objects and the like is displayed on the display board.

[0006]

[Problems to be Solved by the Invention] By the way, in the arrival order determination device using the slit camera as described above,
It is considered desirable to be able to accurately determine the finish line of a moving subject, and to simultaneously display time information at the time the subject was photographed when displaying an image of the subject. However, the above-mentioned conventional technology has a problem in that it is not possible to simultaneously display an image of a subject and time information at the time when the subject was photographed.

The present invention has been made in view of the above problems, and provides a video signal processing device that is capable of storing an image of a subject and time information at the time when the subject was photographed in association with each other. The purpose is to

[0008]

Means for Solving the Problems The video signal processing device of the present invention includes, for example, as shown in FIG. 1, a trigger generator 27 that generates a start trigger signal, and a trigger signal ST supplied from the trigger generator 27. It has a time information generating means 26 that generates time information DT that is reset by a slit 5, and a light L having video information from the slit 5.
A slit camera 10 that receives a video signal S and outputs a video signal S.
and a storage means 22 for storing the video signal S obtained from the slit camera 10 and time information DT in correspondence with each other.

[0009]

According to the video signal processing apparatus of the present invention, the time information generating means 26 generates the time information DT which is reset by the trigger signal ST supplied from the trigger generator 27. In addition, the video signal S (DS) from the slit camera 10
is output. Furthermore, the storage means 22 can store the video signal DS and the time information DT in correspondence.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the video signal processing apparatus of the present invention will be described below with reference to the drawings. The video signal processing device in this embodiment has a slit camera section 10, as shown in FIG. FIG. 1 shows a plan view of the slit camera section 10. In FIG. 1, 1 is a moving subject, and the subject 1 moves in an arrow direction A from a start line 4A to a goal line 4B. This subject 1
The light L having image information from is converged by the first lens 2 and passes through the slit 5 of the slit member 3. The image is formed at the position of the slit 5. slit 5
The direction A and the moving direction A of the subject 1 are arranged in a direction perpendicular to each other.

The light L passing through the slit 5 is a linear light L.
, the light enters the rotating prism 6 rotating in the direction of the arrow B. In this embodiment, the rotating prism 6 has a side surface 6A.
~6H, and has a prismatic shape with a regular octagonal cross section when viewed from the direction of the axis 12. As a rotating prism,
It is sufficient if it is a prismatic body whose opposing side surfaces are parallel to each other. Therefore, any prismatic body having an even number of sides, such as a quadrangular prism or a hexagonal prism, may have four or more sides.

The linear light L incident on one side of the rotating prism 6 passes through the interior of the rotating prism 6 and exits. In this case, the incident angle θ of the incident linear light L is θ=90
When the light is not at a degree, the optical path is changed within the rotating prism 6 and the light is emitted. Note that the first lens 2 and the slit member 3 are arranged so that an extension of the optical axis LX of the linear light L incident on the rotating prism 6 is orthogonal to the axis 12 of the rotating prism 6. Also, the extension line of the optical axis LX is the goal line 4.
The first lens 2 and the slit member 3 are arranged so as to match B.

Linear light L emitted from the rotating prism 6
is converged again through a relay lens 7, which is a second lens, and is imaged onto a photoelectric conversion surface 9 of an area sensor 8 such as a CCD area sensor. On the photoelectric conversion surface 9, pixels having a photoelectric conversion function are arranged in a planar manner in the horizontal and vertical directions. The horizontal direction corresponds to the direction of horizontal scanning lines in standard television systems. In this embodiment, the area sensor 8 is rotated 90 degrees and arranged so that the horizontal direction and the length direction of the slit 5 formed in the slit member 3 coincide with each other. This is to ensure the resolution of the subject 1 in the vertical direction.

The photoelectric conversion surface 9 is scanned by the linear light L deflected by the rotating prism 6 and emitted. The state of the scanning surface formed on the photoelectric conversion surface 9 of the area sensor 8 by deflection scanning by the rotating prism 6 is schematically shown in FIG. 2 (the relay lens 7 is omitted). Note that the rotating prism 6 is rotated by a motor 14 through a shaft 12. An encoder 15 is attached to the motor 14, and the rotational speed of the motor 14 is servo-controlled by a microprocessor (not shown) based on the output signal of the encoder 15.

Scanning surface 9A (linear light L) on photoelectric conversion surface 9
A planar image is formed by the linear light L on the surface formed by the passage of the linear light L. Here, by one scan (from point P in the figure to Q in the figure) of the linear light L deflected by one side surface of the rotating prism 6, for example, the side surface 6B, a light beam is formed on the scanning surface 9A. It is understood that the video image is a video image that can correspond to one vertical period in a standard television system. Therefore, a surface image is accumulated on the photoelectric conversion surface 9 during a period corresponding to this one vertical period, and this surface image can be read out once per one vertical period as a video signal S of surface information using a standard television system. . Note that the frequency of one vertical period is not limited to the frequency according to the standard NTSC system. In this embodiment, the frequency is lower than that.

A video signal S of surface information outputted from the area sensor 8 is read out using a standard television method using a readout signal from a controller (not shown), and
After being converted into a digital video signal DS by the converter 21, it is written into the mass memory 22. In addition, horizontal direction H
The readout width (pixel width) (see FIG. 2) is read out for each linear image width d formed on the photoelectric conversion surface 9 of the area sensor 8 when the rotating prism 6 is considered to be stopped. .

The large capacity memory 22 has a video memory area 23 and a time memory area 24, as shown in FIG. 3A. These video memory areas 23 and time memory areas 24 are eight video memory areas 23A to 23H that continuously store digital video signals DS of screen images corresponding to eight vertical periods, and eight video memory areas 23A to 23H, respectively. Time memory area 2 that stores a digital time signal corresponding to the digital video signal DS stored in 23H.
4A to 24H.

In this case, the large capacity memory area 22 has the following information:
The digital video signal DS corresponding to the linear video width d is sequentially written into each unit memory area UM (memory area corresponding to the pixel width) in the horizontal direction.

FIG. 3B shows the digital video signal DS and the time information D, which is a digital time signal, sent to the large capacity memory 22.
It conceptually shows the state of T after it has been memorized. A digital video signal DS of the video signal S supplied from the slit camera section 10 is stored in the video memory areas 23A to 23H. This digital video signal DS consists of pixel data representing a video 25 corresponding to the subject 1. on the other hand,
Data constituting the time information DT supplied from the time information generation circuit 26 is stored in the time memory areas 24A to 24J.

The time information generating circuit 26 has a start line 4.
A start trigger signal ST that matches the start signal is supplied from a trigger generator 27, which is a start signal generator placed at position A (see FIG. 1), and the time information generating circuit 26 receives this start trigger signal ST. Upon arrival, the clock time is reset to zero value. The time information generation circuit 26 starts a new time measurement after being reset. Then, the time information generation circuit 26 sequentially supplies the digital time signal to the time memory area 24 of the large-capacity memory 22 after a predetermined time has elapsed since the arrival of the start trigger signal ST.

[0021] In this way, the large capacity memory 22 has
A digital video signal DS and time information DT when the subject 1 passes the goal line 4B (see FIG. 1) are stored.

In this case, the digital time signal DS is A/
The digital video signal DS corresponding to the linear video width d output from the D converter 21 is stored in the unit memory area UM (Fig. 3B
In response to sequential writing to the video memory area 23X (see hatching in the figure), the time information D
T is written in synchronization with the time memory area 24Y, which is shaded in the figure. These two signals are sequentially written into the large capacity memory area 22 in a so-called pair state. As a result, the image 25 of the subject 1 and the time information DT at the time when the subject 1 was photographed are recorded in correspondence.

The digital video signal DS and time information DT thus written into the large-capacity memory 22 are subjected to compression processing and the like as a pair, and then transferred to the buffer memory 30 and stored therein. The digital video signal having time information stored in the buffer memory 30 is encoded by the encoder 32 and output as a composite video signal. Therefore, by observing the video (still image) based on this composite video signal on the screen of the monitor 33, it is possible to accurately determine the order of arrival of the subjects 1. At that time, subject 1
Since the time information at the time of shooting is displayed at the same time,
You can know the time from when you start to when you cross the finish line 4B.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

[0025]

As explained above, according to the video signal processing device of the present invention, the time information output from the time information generation means and the video signal output from the slit camera are stored in correspondence with the storage means. It has the effect of being able to

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of a video signal processing device according to the present invention.

2 is a partially omitted perspective view conceptually showing a state in which a planar image is scanned and formed on a photoelectric conversion surface by a rotating prism in the video signal processing device of the example in FIG. 1; FIG.

FIG. 3A is a diagram showing the configuration of a large-capacity memory in the video signal processing device shown in the example of FIG. 1; B is a diagram conceptually showing a video signal and time information stored in pairs in this large-capacity memory.

[Explanation of symbols]

5 Slit 10 Slit camera part 22 Large capacity memory 26 Time information generation circuit 27 Trigger generator DT time information DS Digital video signal L light S Video signal ST Start trigger signal

Claims (1)

[Claims] Claim 1: A trigger generator that generates a start trigger signal; time information generating means that generates time information that is reset by the start trigger signal supplied from the trigger generator; and a slit. An image comprising: a slit camera that receives light having image information and outputs a video signal; and a storage means that stores the video signal obtained from the slit camera in correspondence with the time information. Signal processing device.