JP2002271659A - Method for imaging over wide range - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image pickup device that images photographs of an object over a wide range by using a fixed video camera. SOLUTION: In the method for photographing of the image of an object over a wide range by which the imaging device 1 picks up an image of a plurality of image areas over a wide range, a hologram movement means 4 moves a disk hologram divided into a plurality of areas or sheet hologram 3 divided, into a plurality of rectangular areas to photograph the image of a plurality of imaging areas without moving the image pickup device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging method using a video camera, and more particularly to a wide-area imaging method capable of imaging a wide area.

[0002]

2. Description of the Related Art In imaging by video, a wide range of video or video at a plurality of locations (multiple points) is often required. However, since the range of the visual field is limited in a normal video camera, it is necessary to increase the number of video cameras to be imaged according to a simple method to image a wide area. In addition, various methods have been used to capture images without increasing the number of video cameras.

For example, Japanese Unexamined Patent Publication No. 7-303201 discloses a method for acquiring a wide range of images by moving an imaging video camera (FIG. 14 (a) front view). , (B) side view). This is as shown in FIG.
2 is provided so as to be rotatable in the vertical direction about the X axis and in the horizontal direction about the Z axis. This configuration allows the video camera unit 122 to have considerable weight.
, And it takes a long time to temporarily stop the considerably heavy video camera unit 122 to take an image.

Japanese Patent Application Laid-Open No. H11-4373 discloses a method for acquiring a wide-range image (a full-circle panoramic image) by rotating a mirror (see FIG. 1). 15). This is the imaging device 13
The panoramic image information of the entire circumference is obtained by arranging the mirror 1311 at a position facing the imaging surface 10 and tilting the mirror 1311 with the rotation motor 1312.

[0005] Furthermore, Japanese Patent Application Laid-Open No. 11-95344 discloses an "omnidirectional stereo image photographing apparatus" which discloses a method of acquiring an image over a wide area using two curved mirrors (hyperboloid mirrors) having different curvatures. (See FIGS. 16 and 17). In this method, as shown in FIG. 16 (schematic configuration diagram) and FIG. 17 (vertical cross-sectional view), two hyperbolic mirrors 101 (201) and 102 (202) are focused outside on the origin O ( 203) so that the center of the lens is located at the origin O (203).
04, the measurement point P
By simultaneously photographing the two stereo pairs 208 and 209 of (207), a stereo image of the entire circumference is captured at one time.

[0006]

The above-described conventional wide-range imaging apparatus has the following problems. The “video camera for imaging” shown in FIG. 14 is difficult to move at high speed because of the weight of the video camera itself, and also requires a dome-shaped installation space corresponding to the moving space of the video camera. It is difficult to achieve high speed and small size. Further, the “all-around panoramic image forming method and apparatus” shown in FIG. 15 can move at high speed by reducing the weight of the mirror 1311, but the mirror 1311 can be moved at high speed.
Therefore, a predetermined space is required to secure the movable space, and it is difficult to reduce the size. Further, the “omnidirectional stereo image photographing device” shown in FIGS. 16 and 17 can acquire a wide range of images at once without moving parts, but the information amount of the acquired image is usually small. The image sensor is insufficient and two special mirrors 101 (20
Since 1) and 102 (202) are used, the price is high and it is difficult to reduce the price. Further, since the space for installing these two special mirrors is also required, miniaturization becomes difficult. In view of the above problems, an object of the present invention is to reduce the size and cost of an imaging (photographing) device and to achieve high-speed acquisition of a wide range of images.

[0007]

According to a first aspect of the present invention, there is provided a wide-area imaging method for imaging a plurality of wide-area imaging regions using a fixed imaging device. A disk-shaped hologram having
Alternatively, the disk-shaped hologram in which the diffraction angles of the fan-shaped holograms divided into a plurality of regions are different from each other, or the sheet-shaped hologram in which the diffraction angles of the rectangular holograms divided into a plurality of regions are different from each other is imaged. 3. A wide-area imaging method comprising: disposing the disk-shaped or sheet-shaped hologram by a hologram moving unit to image the plurality of wide-area imaging regions; The invention described in (1) relates to a wide-area imaging method for imaging a plurality of wide-area imaging regions by a fixed imaging device, wherein a disk-shaped hologram having a predetermined diffraction angle or a fan-shaped hologram divided into a plurality of regions is used. Diffraction angles of disk-shaped holograms with different angles or rectangular holograms divided into multiple areas The different sheet-shaped hologram is arranged on the front surface of the imaging device, and the disk-shaped or sheet-shaped hologram is moved by the hologram moving means to perform imaging of the plurality of wide-area imaging regions, and the fixed imaging is performed. Wide-area imaging, wherein a video signal obtained by capturing an image of the plurality of imaging regions output from an apparatus is selected for each video signal of each imaging region corresponding to the plurality of imaging regions and output as a video signal of another system. A method according to the present invention provides a wide-area imaging method for imaging a plurality of wide-area imaging regions with a fixed imaging device. The method includes dividing a disk-shaped hologram having a predetermined diffraction angle into a plurality of regions. Diffraction of a disc-shaped hologram in which the diffraction angle of each fan-shaped hologram is different from each other, or diffraction of each rectangular hologram divided into multiple regions A sheet-shaped hologram having different degrees is arranged on the front surface of the imaging device, and the disk-shaped or sheet-shaped hologram is moved by the hologram moving means to perform imaging of the plurality of wide-area imaging regions. A wide-area imaging method comprising: outputting video signals obtained by imaging a plurality of imaging regions output from a fixed imaging device as a single video signal capable of displaying the plurality of imaging regions simultaneously with a single monitoring device. In a wide-area imaging method for imaging a plurality of wide-area imaging regions by a fixed imaging device, the invention described in claim 4 is divided into a disk-shaped hologram having a predetermined diffraction angle, or divided into a plurality of regions. The diffraction angle of a disk-shaped hologram in which the diffraction angle of each fan-shaped hologram is different from each other, or the diffraction angle of each rectangular hologram divided into multiple regions The sheet-shaped holograms differing from each other are arranged on the front surface of the imaging device, and the disk-shaped or sheet-shaped hologram is moved by hologram moving means. When it is determined that the hologram is stopped, An object of the present invention is to provide a wide-area imaging method characterized in that a specific imaging area of a plurality of imaging areas is imaged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Wide-area imaging method (apparatus) of the present invention
The preferred embodiment will be described below with reference to the drawings. A first embodiment of the wide-area imaging method according to the present invention will be described with reference to FIG. An embodiment of the wide-range imaging method (apparatus) of the present invention shown in FIG. 1 includes an imaging apparatus 1, a lens 2, a hologram 3, and a motor 4 for rotating the hologram 3.

An ordinary video camera or the like can be used as the imaging device 1. A disk-shaped hologram 3 is arranged on the image capturing side of the image capturing apparatus 1. Hologram 3
Is divided into a plurality of regions as shown in FIG. 2, for example, the region is divided into four, and the holograms 3A, 3B, 3C, and 3D in each of the divided regions have different diffraction angles. That is, the hologram 3 has a disk shape, and the disk is divided into a plurality of sector-shaped (in this case, four) regions, and the plurality of sector-shaped holograms correspond to a plurality of imaging regions. It consists of different diffraction angles.

The hologram 3 is divided into a plurality of regions as shown in FIG. 2, and the holograms in each region are formed by holograms having different diffraction angles.
In FIG. 2, the area is divided into four areas, and the number of divisions is the number of divisions according to the number of imaging areas to be imaged, and is manufactured in advance. FIG. 12 schematically shows, in a two-dimensional manner, an imaging apparatus X and imaging areas A0, B0, C0, and D0 to be imaged.

An imaging device having the hologram 3 is indicated by X, and imaging regions to be imaged are indicated by A0, B0, C0, and D0. Z0 indicates an imaging area when the imaging apparatus without the hologram 3 is installed downward in FIG. Normally, if an image is taken without moving the imaging device without the hologram 3, the imaging region is limited to only the imaging region indicated by Z0, and it is naturally impossible to perform imaging in a wide range.

According to the present invention, as shown in FIG. 13, the divided holograms constituting the hologram 3 shown in FIG. 2 are aligned with the positions of a plurality of imaging areas A0, B0, C0, and D0 to be imaged. 3A, 3B, 3C, and 3D (FIG. 6)
By using holograms in which the diffraction angles 6A, 6B, 6C, and 6D) are different from each other, θ _A , θ _B , θ _C , and θ _D , a wide range of these imaging regions A 0, B 0,
Imaging of C0 and D0 was realized.

When a hologram alone is used as shown in FIG. 1, chromatic aberration occurs, and it is difficult to obtain a good image. Therefore, the lens 2 arranged on the front surface of the imaging device 1 is a chromatic aberration correcting lens arranged to correct the chromatic aberration of the hologram 3, and thus, a good image can be obtained. The motor 4 is used to rotate the hologram 3 and change the movement of the imaging area.

FIGS. 3 and 4 show that when the hologram 3 is rotated by the rotation of the motor 4 and different divided areas of the hologram 3 are arranged in front of the imaged image incident portion of the image sensor, the hologram 3 is diffracted. It is a diagram schematically showing a state of being changed. A region 5 surrounded by a solid line shown in FIGS. 3 and 4 indicates an imaging region.

With this configuration, it is possible to capture a wide range of images without moving the video camera itself, and it is not necessary to secure a space for moving the video camera in advance.
In addition, since the hologram plate is thin and lightweight, it can move at high speed if there is a small installation space.

FIG. 5 shows a wide-area imaging method (apparatus) of the present invention.
FIG. 6 is a diagram showing a block configuration of a second example of the present invention. FIG.
The embodiment shown in FIG. 1 includes an image sensor 1, a hologram 3, a feed roller 6, and a wavelength selection filter 7. The hologram 3 in FIG. 5 has a thin sheet shape as shown in FIGS. 5 and 6, and is divided into a plurality of rectangular regions 6A, 6B, 6C, and 6D according to the number of imaging regions. That is, the hologram 3 is in the form of a sheet, and the sheet is divided into a plurality of rectangular regions, and the plurality of rectangular holograms have different diffraction angles (diffraction angles) corresponding to the plurality of imaging regions. It is a hologram consisting of

The movement of the hologram 3 is performed by a feed roller 6 and a motor (not shown). By moving the hologram 3 in the left-right direction as shown in FIG. By arranging them on the surface, the imaging region can be changed. In addition, in FIG. 5, the deterioration of the image due to the chromatic aberration of the hologram 3 is prevented by disposing the wavelength selection filter 7 on the captured image incident surface.

Since light incident on the image pickup apparatus 1 by the wavelength selection filter 7 is monochromatic light, a color image cannot be picked up. However, if an image pickup apparatus having a monochrome image pickup device is acceptable, the cost is reduced. Becomes possible. Further, since the hologram 3 can be designed by optimizing the transmission wavelength of the wavelength selection filter 7, the diffraction efficiency of the hologram 3 can be increased.

In the apparatus using the feed roller 6 shown in FIG. 5, as long as an image of the same area of the hologram 3 formed in a sheet shape as shown in FIG. Since the diffraction angle of the hologram does not change, the screen shake does not occur in principle even if the image is taken while the hologram 3 is moving.

FIG. 7 shows a wide-area imaging method (apparatus) of the present invention.
FIG. 10 is a diagram showing a block configuration of a third example of the third embodiment. FIG.
The third embodiment shown in FIG. 1 includes an image sensor 1, a hologram 3, a motor 4 for rotating and moving the hologram 3, and an infrared light emitting diode 8. The motor 4 may be the same as that of the embodiment of FIG. 1, but the method for driving the hologram 3 is different.

The hologram 3 has a disk-like shape and is rotated by a motor 4 as in the embodiment of FIG. 1. However, unlike the embodiment of FIG. 1, the hologram 3 is not divided into a plurality of regions. As shown in FIG. 8, it is composed of a single hologram. Although not shown in detail, since the center of the hologram is also used for imaging, the hologram is not supported at the center as shown in FIG. Transmitted in the part.

As shown in FIG. 9, by rotating the hologram 3 with the motor 4, the diffraction angle of the hologram 3 having a single configuration does not change, but the diffraction direction is changed, so that the unit imaging areas e are successively changed. By changing the movement, it is possible to photograph a plurality of imaging regions d.

Thus, the rotation of the hologram 3 by the rotation of the motor 4 makes it possible to scan a plurality of ring-shaped imaging regions d. The infrared light emitting diode 8 shown in FIG. 7 is used as illumination light for photographing an imaging region.

This embodiment is suitable for imaging in a dark place or at night, and uses infrared light which cannot be sensed by human eyes as illumination light. In this example,
Since the infrared light emitting diode 8 emits light of a limited wavelength, it is not necessary to consider chromatic aberration in the hologram 3.

Therefore, it is not necessary to use a correction lens or a wavelength selection filter. Also, for the imaging device 1,
A normal monochrome type can be used because it has infrared sensitivity. For this reason, the configuration of the present embodiment can be configured at low cost.

In the above embodiment, the imaging device 1, the shape of the hologram 3, the aberration correction lens 2, the wavelength selection filter 7,
Although several embodiments have been shown in which the infrared light emitting diode 8 for illumination light and the like are combined, it goes without saying that other combinations can be used depending on the usage form.

The block configuration of a fourth embodiment of the wide-area imaging apparatus to which the wide-area imaging method of the present invention is applied will be described below with reference to the drawings. The fourth embodiment shown in FIG. 10 is a portion 9 surrounded by a solid line, and includes an imaging device 1 for imaging an imaging region 5, a lens 2, a hologram 3, a motor 4,
Motor control circuit 10, hologram position detection circuit 11, sensor 11S, microcomputer circuit 12, Y / C separation circuit 13,
Synchronization signal separation circuit 14, decoder 15, A / D converter 16, image selection circuit 17, image memories 18A to 18
D, D / A converter 19, encoder 20, monitor 2
Video signal generation circuits 21A to 21D for supplying output signals to 3A to 23D and VTRs 24A to 24D, and a synchronization signal generation circuit 22.

The images acquired by the wide-range image pickup apparatus include a plurality of monitoring devices (monitors) 23A to 23D and VTRs 24A to
It is possible to observe at 24D. The hologram 3 shown in FIG. 10 has a configuration having four regions 3A to 3D shown in FIG. 2, and the imaging device 1, the hologram 3, and the motor 4 shown in FIG. The configuration is the same as that described above, and another configuration described in the embodiment may be used.

The wide-range imaging device of the present invention is controlled by the microcomputer circuit 12. The control signal from the microcomputer circuit 12 is supplied to the motor 4 supplied via the motor control circuit 10.
Rotates, and the hologram 3 rotates.

A change in the imaging area, that is, a movement of the fan-shaped area as shown in FIG. 2 with the rotation of the hologram 3, is detected by the sensor 11S and the hologram position detection circuit 11, and the hologram position detection circuit 11 The detected position detection signal is supplied to the microcomputer circuit 12.

The microcomputer circuit 12 receives the position detection signal.
Detects the completion of the movement with respect to the hologram area corresponding to the predetermined imaging area, stops the rotation of the motor 4 via the motor control circuit 10, and allows the image selection circuit 17 to image the predetermined imaging area. Tell that.

The video signal picked up and output by the image pickup device 1 is supplied to a Y / C separation circuit 13 where it is separated into a chrominance signal C and a luminance signal Y. Separates the synchronization signal.

The synchronizing signal separated by the synchronizing signal separating circuit 14 is supplied to an A / D converter 16 and an image selecting circuit 17.
To be used as a timing signal for capturing image data. The chrominance signal C and the luminance signal Y are supplied to a decoder 15, converted into RGB signals, and input to an A / D converter 16.

In the image selection circuit 17, the microcomputer circuit 12
The image memories 18A to 18A corresponding to the imaging regions are provided in accordance with a signal indicating that imaging of a predetermined imaging region is possible from
The captured image is stored in any one of D. This image memory 18
Reading of the image data stored in A to 18D is performed asynchronously with the capturing of the image.

The image data stored in the image memories 18A to 18D are sequentially read out according to the synchronizing signal generated by the synchronizing signal generating circuit 22, and are read out from the D / A converters 19A to 19D.
9D, encoders 20A to 20D, video signal generation circuit 2
It is converted into a video signal via 1A to 21D and output.

The moving state of the hologram 3 is determined by the image selection circuit 1.
Reference numeral 7 is detected by a signal from the microcomputer circuit 12, and the image memories 18A to 18D take in image data. This is to prevent image blurring occurring in a captured image during imaging while the hologram is being moved by being imaged while the hologram 3 is stopped.

Further, as described above, since the capturing and reading of the image data are performed asynchronously, the monitors 23A to 23A
D and the images observed by the VTRs 24A to 24D are different images for each vertical cycle in a normal camera, but the same image is monitored (observed) in a plurality of vertical cycles in the present imaging apparatus.
That is, the image is periodically updated with the movement of the hologram 3, and it is easy to increase the moving speed of the hologram 3 because the configuration of the hologram 3 can be reduced in weight. It does not hinder monitoring.

Next, a block configuration of a fifth embodiment of the wide-area imaging apparatus to which the wide-area imaging method of the present invention is applied will be described with reference to the drawings. The fifth embodiment shown in FIG. 11 is a portion 9A surrounded by a solid line, and includes an imaging device 1 for imaging an imaging region 5, a lens 2, a hologram 3, a motor 4, a motor control circuit 10, a hologram position detection. Circuit 1
1, sensor 11S, microcomputer circuit 12, Y / C separation circuit 13, synchronization signal separation circuit 14, decoder 15, A / D converter 16, image selection circuit 17, image memory 18A to
18D, a D / A converter 19, an encoder 20, a video signal generating circuit 21, which outputs output signals to a monitor 23 and a VTR 24, a synchronizing signal generating circuit 22, an image synthesizing circuit 25,
And an output image memory 26.

The hologram 3 shown in FIG. 11 has a configuration having four regions A to D shown in FIG.
The imaging device 1, hologram 3, and motor 4 shown in FIG.
The configuration is the same as that described in the wide-area imaging method, and another configuration described in the embodiment may be used.

The captured image is taken in the same manner as in the embodiment shown in FIG. In this embodiment, the image data stored in the plurality of image memories 18A to 18D are combined into one image data by the image combining circuit 25.
It is stored in the output image memory 26.

In the image synthesizing circuit 25, the microcomputer circuit 12
, For example, the output image memory 26
The data for one horizontal line is stored in the horizontal
Each of the image memories 18A to 18A is stored in accordance with a synthesizing method in which the data for the lines is thinned out to 間 and sequentially stored.
The image data from 18D is written to the output image memory 26.

The image data written in the output image memory 26 is output as a video signal as in the embodiment of FIG. In the present embodiment, the image combining circuit 25 combines the image data of a plurality of image capturing areas into one piece of image data, so that it is possible to monitor with a single monitoring device 23.

As described in the third embodiment shown in FIG. 7, in this embodiment, the update cycle of the image is in accordance with the movement of the hologram. The image of the area is not exactly the same image at the same time, but the image is updated periodically as the hologram moves,
Further, since it is easy to increase the moving speed of the hologram, it does not hinder image capturing (observation).

Finally, the image blur of the picked-up image due to the movement of the hologram 3 will be described. (1) In any of the methods shown in FIGS. 1, 5 and 7, unless the hologram moves at a high speed, it does not become an obstacle during imaging. The image obtained by the movement of the hologram 3 can be seen as an image sequentially moved on the monitoring device in the same manner as a general swing type video camera.

(2) As shown in FIGS. 1 and 5, when the hologram 3 is divided into a plurality of regions, the low-speed movement is as described in (1) above. But,
In imaging a large number of imaging points (imaging areas), if the moving period of the hologram is, for example, 5 seconds, observation can be performed only every 5 seconds. The higher the speed, the shorter the imaging (observation) cycle, but the faster the image moves, the more difficult it is to observe with a monitoring device. That is, when it is desired to observe a large number of imaging points in a pseudo-simultaneous manner, it is better to use the wide-area imaging device shown in FIGS.

[0046]

According to the first aspect of the present invention, in a wide-area imaging method for imaging a plurality of wide-area imaging regions using a fixed imaging device, a disk-shaped hologram having a predetermined diffraction angle or a plurality of regions can be used. A disk-shaped hologram in which the diffraction angles of the divided fan-shaped holograms are different from each other, or a sheet-shaped hologram in which the diffraction angles of the rectangular holograms divided into a plurality of regions are different from each other are provided on the front surface of the imaging device. It is arranged, and the disk-shaped or sheet-shaped hologram is moved by the hologram moving means, so that imaging of the plurality of wide-area imaging regions is performed, so that wide-area imaging can be performed only by moving the hologram. Compared to the one that moves the imaging device (video camera) itself or the one that moves (rotates) the mirror, it takes up less space, It is possible to reduce the size of the location.

According to the first aspect of the present invention, a wide-range image can be taken only by moving the hologram, so that a multi-axis drive mechanism such as that for moving the video camera itself is not required. Since it is not necessary to use two hyperboloid mirrors having an expensive special shape, for example, having different curvatures, it is possible to reduce the cost of the apparatus.

According to the first aspect of the present invention, a wide range of images can be captured only by moving the hologram. Therefore, unlike the case of moving a heavy object such as a device for moving the image pickup device itself, the speed is high. Each imaging area can be switched, and only a thin disk-shaped or sheet-shaped hologram needs to be moved.

According to a second aspect of the present invention, in a wide-area imaging method for imaging a plurality of wide-area imaging regions by a fixed imaging device, a disk-shaped hologram having a predetermined diffraction angle or a plurality of regions is formed. A disk-shaped hologram in which the diffraction angles of the divided fan-shaped holograms are different from each other, or a sheet-shaped hologram in which the diffraction angles of the rectangular holograms divided into a plurality of regions are different from each other are provided on the front surface of the imaging device. Arranged, the disk-shaped or sheet-shaped hologram is moved by the hologram moving means, images of the plurality of wide-area imaging regions are taken, and a video signal of the plurality of imaging regions output from the imaging device is taken. The video signal of each imaging area corresponding to the plurality of imaging areas is selected and output as a video signal of another system. While an imaging of a plurality of imaging regions, the imaging apparatus cost on so requires only one can also be efficient and low cost.

According to the third aspect of the present invention, in a wide-area imaging method for imaging a plurality of wide-area imaging regions with a fixed imaging device, a disk-shaped hologram having a predetermined diffraction angle or a plurality of regions can be used. A disk-shaped hologram in which the diffraction angles of the divided fan-shaped holograms are different from each other, or a sheet-shaped hologram in which the diffraction angles of the rectangular holograms divided into a plurality of regions are different from each other are provided on the front surface of the imaging device. Arranged, the disk-shaped or sheet-shaped hologram is moved by the hologram moving means to perform imaging of the plurality of wide-area imaging regions, and obtain a video signal of the plurality of imaging regions output from the imaging device. Since the plurality of imaging areas are simultaneously output as a single video signal that can be displayed by a single monitoring device, Need not only in one, also because it is sufficient one monitoring device, configuration can be a very simple, it can be configured at a low price.

According to the fourth aspect of the present invention, in a wide-area imaging method for imaging a plurality of wide-area imaging regions by a fixed imaging device, a disk-shaped hologram having a predetermined diffraction angle or a plurality of regions can be used. A disk-shaped hologram in which the diffraction angles of the divided fan-shaped holograms are different from each other, or a sheet-shaped hologram in which the diffraction angles of the rectangular holograms divided into a plurality of regions are different from each other are provided on the front surface of the imaging device. The hologram is arranged, and the disk-shaped or sheet-shaped hologram is moved by the hologram moving means, and when it is determined that the hologram is stopped, an image of a specific area among the plurality of wide-area imaging areas is taken. As a result, it is possible to capture a good image without screen shake.

[Brief description of the drawings]

FIG. 1 is a diagram showing a block configuration of a first embodiment of a wide-area imaging method according to the present invention.

FIG. 2 is a diagram showing a configuration of a hologram used in a first embodiment of the wide-area imaging method of the present invention.

FIG. 3 is a diagram showing an imaging area of a first embodiment of the wide-area imaging method of the present invention.

FIG. 4 is a diagram showing an imaging area of a first embodiment of the wide-area imaging method of the present invention.

FIG. 5 is a diagram showing a block configuration of a second embodiment of the wide-area imaging method of the present invention.

FIG. 6 is a diagram showing a configuration of a hologram used in a second embodiment of the wide-area imaging method of the present invention.

FIG. 7 is a diagram illustrating a block configuration of a third embodiment of the wide-area imaging method according to the present invention.

FIG. 8 is a diagram showing a configuration of a hologram used in a third embodiment of the wide-area imaging method of the present invention.

FIG. 9 is a diagram showing an imaging area of a third embodiment of the wide-area imaging method of the present invention.

FIG. 10 is a diagram showing a block configuration of a fourth embodiment of the wide-area imaging apparatus to which the wide-area imaging method of the present invention is applied.

FIG. 11 is a diagram showing a block configuration of a fifth embodiment of the wide-area imaging apparatus to which the wide-area imaging method of the present invention is applied.

FIG. 12 is a diagram schematically showing a two-dimensional outline of a relationship between an imaging device and an imaging region in the wide-area imaging method of the present invention.

FIG. 13 is a diagram schematically illustrating, in a two-dimensional manner, an outline of the relationship between an imaging device and its imaging region according to the wide-area imaging method of the present invention.

FIG. 14 is a diagram showing a block configuration of an example of a conventional wide-area imaging method using camera movement.

FIG. 15 is a diagram showing a block configuration of an example of a conventional wide-area imaging method by rotating a mirror.

FIG. 16 is a diagram showing a schematic configuration of an example of a conventional wide-area imaging (omnidirectional stereo image imaging) method using a curved mirror.

17 is a diagram illustrating a vertical cross section of a schematic configuration of an example of a wide-area imaging method using the mirror in FIG. 16;

[Explanation of symbols]

Reference Signs List 1 imaging device (video camera) 2 lens (chromatic aberration correcting lens) 3 hologram 3A, 3B, 3C, 3D fan-shaped holograms constituting hologram 3 and having different diffraction angles from each other 4 motor (hologram moving means) 5 imaging region Reference Signs List 6 Feeding rollers 6A, 6B, 6C, 6D Rectangular holograms constituting divided hologram 3 and having different diffraction angles from each other 7 Wavelength selection filter 8 Infrared light emitting diode 9, 9A Wide-range imaging (image acquisition) device 10 Motor control circuit Reference Signs List 11 hologram position detection circuit 11S sensor 12 microcomputer circuit 13 Y / C separation circuit 14 synchronization signal separation circuit 15 decoder 16 A / D converter 17 image selection circuit 18A-18D image memory 19, 19A-19D D / A converter 20, 20A- 20D encoder 21, 21A -21D video signal generation circuit 22 synchronization signal generation circuit 23, 23A-23D monitoring (observation) device, monitor 24, 24A-24D VTR, recording / reproducing device 25 image synthesis circuit 26 output image memory A0, B0, C0, D0, Z0 Imaging area X Imaging apparatus including hologram 3 d Multiple imaging areas e Unit imaging area θ _A , θ _B , θ _C , θ _D Hologram diffraction angle

Claims (4)

[Claims] 1. A wide-area imaging method for imaging a wide range of a plurality of imaging regions by a fixed imaging device, wherein a diffraction angle of a disk-shaped hologram having a predetermined diffraction angle or a fan-shaped hologram divided into a plurality of regions is determined. A disc-shaped hologram having different disc-shaped holograms or a sheet-shaped hologram having different diffraction angles of rectangular holograms divided into a plurality of regions is arranged on the front surface of the imaging apparatus, and the disc-shaped or sheet-shaped hologram is provided. Wherein the hologram moving means is used to perform imaging of the plurality of imaging regions over a wide area. 2. A wide-area imaging method for imaging a plurality of wide-area imaging regions by a fixed imaging device, wherein a diffraction angle of a disk-shaped hologram having a predetermined diffraction angle or a fan-shaped hologram divided into a plurality of regions is determined. A disc-shaped hologram having different disc-shaped holograms or a sheet-shaped hologram having different diffraction angles of rectangular holograms divided into a plurality of regions is arranged on the front surface of the imaging apparatus, and the disc-shaped or sheet-shaped hologram is provided. Is moved by the hologram moving means, and images of the plurality of wide-area imaging regions are taken, and video signals obtained by imaging the plurality of imaging regions output from the fixed imaging device correspond to the plurality of imaging regions. A wide-area imaging method characterized by selecting for each image signal of an imaging region and outputting as a video signal of another system. 3. A wide-area imaging method for imaging a plurality of imaging regions over a wide area by a fixed imaging device, wherein a diffraction angle of a disk-shaped hologram having a predetermined diffraction angle or a fan-shaped hologram divided into a plurality of regions is determined. A disc-shaped hologram having different disc-shaped holograms or a sheet-shaped hologram having different diffraction angles of rectangular holograms divided into a plurality of regions is arranged on the front surface of the imaging apparatus, and the disc-shaped or sheet-shaped hologram is provided. Is moved by the hologram moving means, and images of the plurality of wide-area imaging regions are taken. A wide-area imaging method characterized by outputting an imaging area as a single video signal capable of being displayed. 4. A wide-area imaging method for imaging a plurality of imaging regions over a wide area by a fixed imaging device, wherein a diffraction angle of a disk-shaped hologram having a predetermined diffraction angle or a fan-shaped hologram divided into a plurality of regions is determined. A disc-shaped hologram having different disc-shaped holograms or a sheet-shaped hologram having different diffraction angles of rectangular holograms divided into a plurality of regions is arranged on the front surface of the imaging apparatus, and the disc-shaped or sheet-shaped hologram is provided. And moving the hologram by means of a hologram moving means, and, when it is determined that the hologram is stopped, taking an image of a specific imaging region among the plurality of wide-ranging imaging regions.