JP2626803B2 - Image segmentation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention divides a subject into a plurality of images, shoots the images, obtains a video signal for each of the divided images, and obtains a plurality of video signals obtained as the respective video signals. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image division and synthesis method for reproducing and displaying a divided image and synthesizing it into one image, and more particularly to an image division and synthesis method capable of accurately and easily performing image division and image synthesis.

[Conventional technology]

Conventionally, this type of image division and synthesis method has been realized by a photographing and recording device and a reproduction and display device. In such an image division / synthesis method, the photographing / recording apparatus divides a subject into a plurality of images to photograph, obtains a video signal for each image, and records them. Further, the reproduction display device reproduces and displays the plurality of divided images obtained as the respective video signals again, and combines them into one image. According to such an image division / synthesis method, one image is divided into a plurality of images by the photographing / recording device, and these are imaged by different image sensors, so that one image is captured by one image sensor. It is possible to obtain an image having a resolution that is an integral multiple of one image sensor as compared with the case of FIG.

FIG. 13 to FIG. 17 are explanatory diagrams of the above-mentioned conventional image division / synthesis method.

FIG. 13 is a block diagram showing a conventional image division / synthesis method.

In FIG. 13, the conventional image division / synthesis method includes a photographing / recording device 1A and a reproduction / display device 2A. The photographing and recording apparatus 1A includes a video camera 3 and video recorders 4a and 4b. The playback display device 2A
Comprises a display device 20 and video players 21a and 21b.

FIG. 14 is a diagram showing an optical system of the video camera 3 of the photographing and recording apparatus 1A.

In FIG. 14, the video camera 3 is composed of one video camera 5. The video camera 5 optically captures the subjects Aa and Ab through a single objective lens 6, divides the divided subjects and supplies the divided subjects to two image sensors 7a and 7b, and outputs the electric signals from the respective image sensors 7a and 7b. It is a device that can be taken out. The optical system of the video camera 5 includes:
The objects Aa and Ab are optically captured via the objective lens 6 and primary-imaged (Pa, Pb shown) near the right-angle mirror 8. The primary images Pa and Pb are divided into two by the right-angle mirror 8. Each element is arranged so that a secondary image (Sa, Sb in the drawing) is formed on the surface of each image sensor 7a, 7b through the two relay lenses 9a, 9b.

According to such an optical system of the video camera 5, the subject
Aa and Ab are optically primary images (P
a, Pb). The primary images Pa and Pb are divided into two images by the right-angle mirror 8. The two divided images pass through the relay lenses 9a and 9b, respectively, and are formed as secondary images (Sa and Sb) on the image sensors 7a and 7b. Each of the divided images Sa and Sb is converted into an electric signal by each of the imaging elements 7a and 7b, and these are extracted as two video signals through a signal processing circuit system (not shown) of the video camera 5. These video signals are recorded by the video recorders 4a and 4b, respectively.

When the respective video signals are supplied to a video monitor (not shown), divided images Sa and Sb are displayed on the screen of the video monitor as shown in FIGS. 15 (a) and 15 (b). As can be understood from FIGS. 15 (a) and (b), the divided images Sa and Sb are images of the central portion of the subject (C in the drawing).
a, Cb) are slightly overlapped with each other.

FIG. 16 is a diagram showing another configuration of the optical system of the video camera 3 of the imaging and recording apparatus 1A.

In FIG. 16, the video camera 3 is composed of two video cameras 15a and 15b. The optical system of the video cameras 15a and 15b is configured as follows. The optical system of the video camera 15a includes an objective lens 16a that optically captures the subject Aa, and an imaging device 17a that converts an image formed by the objective lens 16a into an electric signal. The optical system of the video camera 15b includes an objective lens 16b that optically captures the subject Ab, and an image sensor 17b that converts an image formed by the objective lens 16b into an electric signal.

The subject Aa is optically focused (Sa) on the image sensor 17a via the objective lens 16a in the video camera 15a. The subject Ab is optically imaged (Sb) on the image sensor 17b via the objective lens 16b in the video camera 15b. Each of the divided images Sa and Sb is converted into an electric signal by each of the imaging devices 17a and 17b, and is extracted as a video signal through a signal processing circuit system (not shown) of each of the video cameras 15a and 15b. These video signals are recorded by the video recorders 4a and 4b.

When the video signals are supplied to a video monitor (not shown), divided images Sa and Sb are displayed on the screen of the video monitor as shown in FIGS. 15 (a) and 15 (b). As can be understood from FIGS. 15 (a) and (b), the divided images Sa and Sb are images of the central portion of the subject (C in the drawing).
a, Cb) are slightly overlapped with each other.

FIG. 17 (I) is a configuration diagram of the display device 20 of the reproduction display device 2A. FIG. 17 (II) is an explanatory view showing an image displayed on the screen of the display device 20.

In FIG. 17 (I), the display device 20
A screen 22 and a video player of the reproduction display device 2A
An image is screen 22 based on each video signal from 21a and 21b.
And video projectors 23a and 23b displayed above.

The video projector 23a captures and displays a video signal of the divided image Sa reproduced by the video player 21a on a screen 22 as an image Sa. The video projector 23b projects and displays the video signal of the divided image Sb reproduced by the video player 21b on the screen 22 as an image Sb. Here, the horizontal and vertical directions of the divided images Sa and Sb projected from the respective video projectors 23a and 23b are shown.
Adjust the vertical position. This is accomplished by electrically adjusting the deflection of each picture tube of the video projectors 23a and 23b, or by adjusting the physical arrangement of the video projectors 23a and 23b, as shown in FIG. Is executed so that the portions (Ca, Cb) displayed overlapping with each other match. As a result, a seamless composite image can be obtained on the screen 22, as shown in FIG. 17 (II).

In this way, a high-resolution image having twice the resolution on the screen 22 as compared with a case where an image is captured by one image sensor is obtained.

[Problems to be solved by the invention]

By the way, in the conventional image division / synthesis method, when dividing the above-mentioned image, there is no particular mark, and therefore, at the time of shooting, the images of the central part of the subject are mutually included in each divided image. The video camera's optical system is roughly adjusted so that it is included little by little. When synthesizing each divided image, each image is reproduced and displayed on a display device, and the horizontal and vertical positions of each image are adjusted while observing the actually synthesized image so that a correct synthesized image is obtained. ing.

As described above, in the conventional image division / synthesis method, when dividing and synthesizing an image, there is no reference, and every time shooting and playback display are performed, the video camera and the display device must be adjusted according to the image at that time. Therefore, the adjustment is complicated and cumbersome, not only takes time, but also has a disadvantage that the system is poor in versatility.

The present invention has been made in order to solve the above-mentioned drawbacks, and provides a practical image division / synthesis method that can easily and accurately perform adjustment required for image division / synthesis and that can be standardized as a system. The purpose is to do.

[Means for solving the problem]

In order to achieve the above object, an image dividing and synthesizing method according to the present invention is characterized in that a subject is divided into a plurality of images and photographed, and a video signal is obtained for each of the divided images. The reproduced image is reproduced and displayed, and a composite image is synthesized into a single image. A reference mark generated at a certain time interval from a video synchronization signal as a starting point is inserted as a video signal into each of a plurality of divided images obtained from a video camera. Then, the photographing device is adjusted in advance so that each of the fiducial marks and the optical image dividing boundary of each of the divided images match, and photographing is performed, and the fiducial mark is displayed on each of the divided screens of the display device. After adjusting the display device in advance so that the respective reference marks coincide with each other, each of the divided images is displayed and image composition is performed.

[Action]

In the image dividing and synthesizing method, first, a video signal of a reference mark is inserted into a video signal of each divided image obtained by the imaging apparatus, and each reference mark and an optical image division boundary of each divided image are aligned. Adjust the imaging device to match. Next, each of the reference marks is displayed on each of the divided screens of the display device, and the display device is adjusted such that each of the reference marks and the optical image synthesis boundary of each of the divided screens match. By initially setting the photographing device and the display device as described above, the image of the subject that is divided into a plurality of images and photographed by the imaging device is correctly combined with the original image on the display device.

As described above, according to the image division / synthesis method of the present invention, image division / synthesis can be easily and accurately performed, and the system can be standardized.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment> FIGS. 1 to 8 illustrate a first embodiment of the present invention.

FIG. 1 is a block diagram showing a system for realizing an embodiment of an image division / synthesis method according to the present invention.

In FIG. 1, the image division / synthesis method includes a photographing / recording device 1B and a reproduction / display device 2B.

The shooting and recording apparatus 1B includes a video camera 30, fiducial mark generation circuits 31a and 31b, and video signal switching circuits 32a and 32b,
An image changeover switch 33, video recorders 4a and 4b, and a video monitor 35 are provided. The video camera 30 is
In the case of this embodiment, a video camera 5 having an optical system using a single objective lens 6 shown in FIG.

Two video signals output from the video camera 30
Va and Vb are supplied to reference mark generating circuits 31a and 31b, respectively, and are supplied to video signal switching circuits 32a and 32b. The reference mark generation circuits 31a, 31b
Captures the video signals Va and Vb and outputs the predetermined reference marks Ma and
It has a circuit configuration that generates Mb.

The reference mark Ma is input to the video signal switching circuit 32a and is switched on the same screen at a certain ratio with the video signal Va, and the output is supplied to the image switching switch 33 and the video recorder 4a. It has become. Further, the reference mark Mb is connected to the video signal switching circuit 32b.
And is switched on the same screen at a certain ratio with the video signal Vb.
And the video recorder 4b.
The image changeover switch 33 is connected to the video signal changeover circuit 32.
One of the outputs from a and 32b is selected and the output is supplied to the video monitor 35.

The reproduction display device 2B includes a display device 20, and video players 21a and 21b. The display device 20 basically has a structure shown in FIG.
Note that the reproduction display device 2B adjusts the display device 20 using the reference mark generation circuits 31a and 31b at an initial setting stage.

FIG. 2 is an explanatory view showing a glass plate provided with an optical mark to be installed in the optical system of the video camera 5 shown in FIG. FIG. 3 is an explanatory view showing a divided image obtained when the optical mark is attached and the image is taken by a video camera.

In FIG. 2, the glass plate 50 is provided with cross-shaped optical marks 51u and 51d. Such a glass plate 50
Are placed on a pair of imaging surfaces of the objective lens 6 of the video camera 5 having the optical system shown in FIG.
As shown in (b), the optical marks 51u, 5u are displayed on the divided images Sa, Sb.
1d can be added respectively. In this case, a straight line connecting the optical marks 51u and 51d respectively
It is a composite boundary. In FIG. 3, a range surrounded by a broken line indicates an overscanning scanning range corresponding to the size of a normal television screen, and a range surrounded by a solid line indicates a wide scanning range of an underscan used for a video monitor or the like. The range is shown. These optical marks 51u, 51d
Is a mark for adjustment, it is necessary to set it outside the vertical scanning range of overscan as shown in FIG. 3 so as not to appear on the screen of the display device 20.

The divided images Sa, with the optical marks 51u, 51d thus attached,
Sb is output from the video camera 30 as video signals Va and Vb. The video signals Va and Vb are supplied to reference mark generation circuits 31a and 31b and video signal switching circuits 32a and 32b, respectively.

FIG. 4 is a block diagram showing a specific example of the reference mark generating circuits 31a and 31b and the video signal switching circuits 32a and 32b used in the above embodiment.

The reference mark generation circuit 31a is configured as follows. That is, the video signal Va from the video camera 30
Is input to the reference mark generation circuit 31a, the video signal Va is converted to a video signal cut black level addition circuit 311,
Subcarrier separation circuit 312 and horizontal synchronization signal separation circuit 313
And is supplied to. The sub-carrier division circuit 312 separates the sub-carrier, and
Is supplied to the quadruple circuit 314 as a digital signal of the pulse repetition frequency. The quadruple circuit 314
Is a quadruple pulse repetition frequency of the digital signal.
14.13818 [MHz] digital signal. The digital signal is supplied to a counter circuit 315. Further, the counter circuit 315 is configured to be reset by the horizontal synchronization signal from the horizontal synchronization signal separation circuit 313. The counter circuit 315 counts up the digital signal from the quadruple circuit 314. The output of the counter circuit 315 is supplied to a count value setting detection circuit 316. The count value setting detection circuit 316 outputs a constant pulse signal when the count value from the counter circuit 315 reaches a predetermined value. When a pulse signal is output from the count value setting detection circuit 316, the one-shot multivibrator circuit 317 is activated and outputs a pulse of a fixed width to the switching circuit 319. The switching circuit 319 outputs a signal from the reference mark luminance level setting circuit 318 only when there is an output from the one-shot multivibrator circuit 317, and otherwise outputs the video signal cut black level adding circuit 31.
A black level signal from 1 is output. The output signal from the switching circuit 319 is used as a reference mark generation circuit 3
Output from 1a.

The reference mark generation circuit 31b has the same configuration as the reference mark generation circuit 31a.

The video signal switching circuit 32a includes a switch circuit 3
21 and a control circuit 322 composed of a counter or the like for forming a signal for switching the signal in synchronization with the horizontal synchronizing signal. The switch circuit 321 outputs the video signal V
a and the output signal from the reference mark generation circuit 31a.

The video signal switching circuit 32b has the same configuration as the video signal switching circuit 32a.

 A first embodiment configured as described above will be described.

The reference mark generation circuit 31a outputs the video signal Va of the divided image.
The reference pulse is generated at a constant time interval (Ta) as shown in FIG. This can be obtained by sending the output from the video signal cut black level adding circuit 311 of the reference mark generating circuit 31a to the switching circuit 319, and switching the switching circuit 319 with a pulse signal from the one-shot multivibrator circuit 317. . Fixed time interval (Ta) of the reference pulse
Is a value set in the count value setting detection circuit 316. The luminance level of the video signal of the reference pulse can be changed by the reference mark luminance level setting circuit 318, and the base of the reference pulse is a black level. When the video signal is viewed on the video monitor 35, as shown in FIG. 6 (a), it is displayed as a bright line with a black level (shaded portion) as a background, and this bright line is a reference mark.
It becomes Ma. The fiducial mark Ma is generated by the fiducial mark generating circuit 31.
By changing the set value of the count value setting detection circuit 316 of a, the time interval (Ta) can be changed, and it can be moved in the horizontal direction on the screen shown in FIG.

The video signal of the reference mark Ma output from the reference mark generation circuit 31a is a video signal switching circuit 32a.
Supplied to Switching circuit 3 of the video signal switching circuit 32a
Reference numeral 21 switches the video signal Va and the video signal of the reference mark Ma at a certain ratio on the same screen. The timing of this switching is controlled by a signal output from the control circuit 322 according to the count value of the horizontal synchronization signal. This switching output signal is supplied to the image switch 33,
It is supplied to the video recorder 4a. This signal is displayed on the screen of the video monitor 35 as shown in FIG. Here, a hatched portion indicates a black level, and a white portion indicates an image of the video signal Va.

The operation described above is the same for the reference mark generation circuit 31b and the video signal switching circuit 32b. Therefore, FIG. 5B output from the reference mark generation circuit 31b.
When the video signal is viewed on the video monitor 35, as shown in FIG. 6B, it is displayed as a bright line with a black level as a background, and this bright line becomes the reference mark Mb. This reference mark Mb can change the time interval (Tb) and can be moved in the horizontal direction on the screen shown in FIG. 6 (b). As described above, the video signal of the reference mark Mb output from the reference mark generation circuit 31b is a video signal switching circuit.
The video signal is switched on the same screen at a certain ratio with the video signal Vb at 32b.
The image is displayed on the screen 35 as shown in FIG. 7 (b).

7 (a) and 7 (b), reference marks Ma and Mb are displayed at the upper and lower hatched portions of the image, and optical marks 51u and 51d are shown at the upper and lower portions of the white portion of the image. Here, since the adjustment has not yet been performed, the reference marks Ma and Mb and the optical marks 51u and 51d are shifted. Therefore, by adjusting the optical meter of the video camera 30 and adjusting the time intervals Ta and Tb of the reference marks Ma and Mb of the reference mark generation circuits 31a and 31b, both marks are matched. When adjusting the optical system of the video camera 30, for example, by moving the right-angle mirror 8 of the video camera 5 in the optical axis direction of the objective lens 6 shown in FIG. The position can be moved symmetrically. After moving the optical marks 51u and 51d to the required positions in this manner, the reference marks Ma and Mb are so set that the reference marks Ma and Mb respectively match the optical marks 51u and 51d.
Time intervals Ta and Tb are adjusted. Thus adjusted after a time interval Ta, the value of Tb fixed as T _a0, T _b0, to the reference mark Ma in this, the Mb and reference mark Ma _0, Mb _0. With this adjustment, the division / combination boundary of the image is replaced with the reference marks Ma ₀ and Mb ₀ from the straight lines connecting the optical marks 51u and 51d, and is newly set. In this manner, the optical reference is replaced with the electrical reference, and subsequent adjustment is facilitated. That is, the video camera 30 is disassembled,
When such re-assembly, it is only necessary to adjust the optical system of the video camera 30 as in the reference mark Ma _0, Mb ₀ optical mark 51 u, 51d matches. Further, as will be described later, all adjustments of the reproduction display device 2B can also be performed only by the reference marks Ma ₀ and Mb ₀ .

The images shown in FIGS. 7A and 7B are also supplied to the video recorders 4a and 4b as output signals of the video signal switching circuits 32a and 32b, and are recorded. here,
The reference marks Ma ₀ and Mb ₀ recorded together with each divided image are:
Since it is out of the vertical scanning range of the overscan indicated by the broken line in FIG. 3 and does not appear on a normal television screen, there is no problem in displaying it on the display device 20 at the time of reproduction and display. Recording Ma ₀ and Mb ₀ is very convenient because the division / synthesis boundary of the image can be confirmed when editing a video tape.

Next, the display device 20 of the reproduction display device 2b is adjusted by using the reference mark generation circuits 31a and 31b set to the same time intervals _Ta0 and _Tb0 . The reference mark generation circuits 31a and 31b used at this time are
May be used for the adjustment. Of course, a reference mark generating circuit provided separately may be used. The input may be a standard video signal, regardless of the content of the image.

The video signals of the reference marks Ma ₀ and Mb ₀ output from the reference mark generation circuits 31a and 31b set to the values of the time intervals T _a0 and T _b0 are supplied to the display device 20. Since the image displayed on the display device 20 is not yet adjusted, the eighth image is displayed.
As shown in FIG. 1 (I), the reference marks Ma ₀ and Mb ₀ are displayed separated from each other.

Here, the horizontal and vertical positions of each image projected from the video projectors 23a and 23b of the display device 20 are electrically or physically adjusted as described above, so that the two reference marks Ma ₀ , the mb _0, FIG. 8 (II)
As shown in FIG. 7, the screen 22 of the display device 20 is aligned on the center line (Cs). By such adjustment, the division / combination boundary of the image is set on the center line of the display device 20.

As described above, the adjustment of the display device 20 of the reproduction display device 2B is performed by the reference mark Ma completely independent of the content of the divided image captured by the video camera 30 of the imaging and recording device 1B.
_Since the adjustments are made on the basis of ₀ and Mb ₀ , the adjustment is standardized, so that the number of display devices used in the system can be easily adjusted, and the necessity of re-adjustment for each shooting and playback display is eliminated.

With the above-described adjustment, the initial settings of the photographing and recording device 1B and the playback display device 2B are all completed, and all the divided images taken by the video camera 30 are displayed on the display device 20 without the need for subsequent adjustment. It is correctly synthesized on the screen 22.

After such initial settings, the video camera of the shooting and recording device 1B
The video signals Va and Vb of the divided image taken by 30 are
Reference mark generating circuits 31a, 31b and video signal switching circuit 3
Through 2a and 32b, they are input to the video recorders 4a and 4b and recorded. The video signals of the divided images recorded on a recording medium such as a video tape are reproduced by the video players 21a and 21b of the reproduction display device 2B, respectively, and displayed on the screen 22 of the display device 20. Also, the first
As shown in the figure, the video signal of each divided image output from the video signal switching circuit 32a, 32b of the photographing / recording apparatus 1B is directly transmitted to the reproduction / display apparatus 2B without passing through the video recorders 4a, 4b and the video players 21a, 21b. Display devices 20
May be displayed on the screen 22.

Second Embodiment Next, a second embodiment of the present invention will be described.

An apparatus for realizing the second embodiment includes a video camera 15a having an optical system shown in FIG. 16 in place of the video camera 30 having the optical system shown in FIG. It is composed of two 15b units, and the other configurations remain unchanged. Therefore, the same reference numerals are given to the same components, and the description will be omitted. This embodiment will be described with reference to FIG.

As described above, in the second embodiment, when the video camera 30 is constituted by the two video cameras 15a and 15b, a common optical mark cannot be attached to each divided image as in the first embodiment. Therefore, in such a configuration, the initial setting is performed by another method without using the optical mark. As described above, the feature of the second embodiment is that the optical mark is not used. Therefore, the video camera 5 having the optical system shown in FIG. 14 can be used also in the second embodiment. In this case, a glass plate with an optical mark is not required.

In FIG. 1, the video cameras 15a, 15a,
The video signals Va and Vb output from 15b and the video signals of the reference marks Ma and Mb output from the reference mark generation circuits 31a and 31b are supplied to video signal switching circuits 32a and 32b. 4th
In the figure, the switching circuit 321 of the video signal switching circuits 32a and 32b includes the video signals Va and Vb as in the first embodiment.
The reference marks Ma and Mb are switched at a certain ratio. Here, the optical system of the video camera 30 and the time intervals Ta and Tb of the reference marks Ma and Mb of the reference mark generation circuits 31a and 31b are adjusted, and each division is made on the screen of the video monitor 35 as shown in FIG. Among the images of the central portion of the subject, which are slightly overlapped with each other on the image, a common portion that is easy to match (the top of the roof of the house in FIG. 9) and the reference marks Ma, M
and b are matched. Thus adjusted after a time interval Ta, the value of Tb fixed as T _a0, T _b0, reference mark Ma at this time as a reference mark Ma _0, Mb ₀ of Mb.

By this adjustment, the division / combination boundary of the image is replaced with the reference marks Ma ₀ and Mb ₀ from the common portion of the subject, and is newly set.

Next, the display device 20 of the generation display device 2B of FIG. 1 is adjusted using the reference mark generation circuits 31a and 31b set to the same values of T _a0 and T _b0 . This adjustment procedure is the same as in the first embodiment, and a description thereof will be omitted.

As described above, even with the initial setting of the second embodiment, a correct composite image can be obtained easily as in the first embodiment.

<Application Example> The optical system of the video camera 30 of the photographing device is adjusted as follows. First, a single objective lens 6 as shown in FIG.
In the case of the video camera 5 having the above-described method, in addition to the method of moving the right-angle mirror 8 as described above, a plane mirror is arranged in the optical path after the image is divided by the right-angle mirror 8, and the angle of the plane mirror is changed. , The horizontal and vertical positions of the divided images can be independently moved.
Further, as shown in FIG. 16, two video cameras 15a and 15
When b is provided independently, the horizontal and vertical positions of the divided images can be moved by adjusting the arrangement of each video camera.

At the time of such initial setting of the photographing apparatus, the image is divided and displayed on the screen of the video monitor 35 by the display as shown in FIGS. 7 and 9 as in the first and second embodiments. In addition to the method of replacing the composite boundary with the reference marks Ma ₀ and Mb ₀ , there is also a method of using the display shown in FIGS. 10 and 11. In these methods, a fiducial mark is superimposed on a divided image as shown in FIGS. In this case, unlike the case of FIGS. 7 and 9, the reference mark is also displayed at the center of the subject, so that the reference portion is located at the common portion of the subject (the right end of the tree trunk in FIGS. 10 and 11). There is an advantage that the marks can be easily matched. However, this fiducial mark is displayed on the display device of the display device.
Since it appears on the screen of No. 20, the reference mark is superimposed only at the time of the initial setting of the photographing apparatus. Therefore, in the case of FIG. 11, the fiducial mark is not recorded, but by superimposing the fiducial mark on the divided image again when editing the video tape, the division / combination boundary of the image can be confirmed.

Next, at the time of initial setting of the display device, in addition to the method of electrically or physically adjusting the video projectors 23a and 23b of the display device 20 as in the first and second embodiments described above. There is also a method of adjusting the display device 20 as shown in FIG. 8 by moving the divided image horizontally and vertically by electrically processing the video signal itself of the divided image. In this method, the horizontal and vertical positions of the divided image are freely moved by changing the horizontal and vertical synchronization pulse positions of the video signal of the divided image. In this case, as shown in FIG. 8 (II), the reference marks Ma ₀ , Mb ₀ are aligned with the reference marks Ma ₀ , Mb ₀ on the center line (Cs) of the screen 22 of the display device 20.
_If the horizontal and vertical synchronization pulse positions of the respective video signals of ₀ are replaced, and the horizontal and vertical synchronization pulses of each video signal of the divided image are set at the same replacement position, the initial setting of the display device is completed. Become. In addition,
When a picture tube is used as the display device 20, attention must be paid to the following points. In general, a picture tube has the characteristic that, when the image is bright (the amount of electron beam is large), the high voltage of the picture tube drops and the deflection amount of the electron beam changes, thereby enlarging the image. For this reason, in general, a high-voltage stabilizing circuit is provided in a circuit of a picture tube to prevent deformation of an image due to a change in luminance of the image. As a display device, there is no problem when using a picture tube taking such measures, but when using a picture tube without taking measures, a correct composite image cannot be obtained with the initial setting of the display device. . In such a case, a high-voltage stabilizing circuit is provided in the circuit of the picture tube, or in the initial setting of the display device, instead of the reference mark with the black level as a background as shown in FIG. If the adjustment is performed using the reference mark with the image as the background, a correct composite image can be obtained. As described above, the method of adjusting the display device using the fiducial mark with the divided image as the background is not limited to the case of the picture tube, and can be generally used.

Further, in each of the above embodiments, when monitoring an image with a video monitor at the time of shooting, the image changeover switch shown in FIG.
33 switches the divided image. However, according to this method, an image of the central portion (composite portion) of the subject cannot be seen at a glance on the same screen. Therefore, by switching the video signal of each divided image on the same screen and adjusting the synchronization between the divided images, as shown in FIG. 12, almost half of each divided image (Sa ', Sb') Can display an image of the central portion of the subject combined at the image division / combination boundary (Ce) on one screen. By doing so, it is possible to see the state when the divided images are actually synthesized. Using such a video monitor display method, the initial setting of the photographing device can also be performed.

In the above embodiment, an example in which one image of a subject is divided into two is described. However, the present invention is not limited to this, and the image may be divided into three or more and combined.

〔The invention's effect〕

As described above, according to the present invention, a reference mark corresponding to an image division boundary is electrically inserted as a video signal instead of an actually shot image. The fiducial mark is an electric fiducial whose fixed time interval from the synchronizing signal is fixed, and therefore is not affected by the photographing conditions and is an absolute fiducial. Then, while the reference mark and the optical image division boundary are adjusted and photographed, the display device is also completely independent of the divided image photographed using only the absolute reference mark, and can be taken at any time. Can be adjusted anywhere. As described above, the adjustment work of the photographing device and the display device is completely standardized, so that an excellent effect that an image obtained by dividing and photographing the divided image can be displayed very easily and accurately can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an apparatus for realizing the first embodiment of the present invention, FIG. 2 is an explanatory diagram of an optical mark used in the embodiment, and FIG. 3 is photographed together with the optical mark in the embodiment. FIG. 4 is a block diagram showing a reference mark generating circuit and a video signal switching circuit of an apparatus for realizing the embodiment, FIG. 5 is an explanatory diagram of a reference mark video signal in the embodiment, FIG. FIG. 7 and FIG. 7 are explanatory diagrams of images relating to fiducial marks obtained in the embodiment, FIG. 8 is a diagram for explaining a method of adjusting the display device in the embodiment,
FIG. 9 is an explanatory view of a second embodiment of the present invention, and FIGS.
12 is an explanatory view of an application example of the present invention, FIG. 13 is a block diagram showing a conventional apparatus, FIG. 14 is a configuration diagram showing an optical system of a video camera, and FIG. 15 is an image taken by the video camera. FIG. 16 is a configuration diagram showing another optical system of the video camera, and FIG. 17 is a configuration diagram showing a display device. 1A, 1B, …… Recording and recording device, 2A, 2B …… Playback display device, 4a,
4b …… Video recorder, 5,15a, 15b …… Video camera, 2
0 ... display device, 21a, 21b ... video player,
31a, 31b: Reference mark generating circuit, 32a, 32b: Video signal switching circuit, 33: Image switching switch, 35: Video monitor.

Claims (1)

(57) [Claims] An object is divided into a plurality of images and photographed, a video signal is obtained for each of the divided images, and the plurality of divided images obtained as the respective video signals are reproduced and displayed again.
In an image division and synthesis method for synthesizing a single image, a reference mark generated at a fixed time interval from a video synchronization signal is inserted as a video signal for each of a plurality of divided images obtained from a video camera. The photographing device is adjusted beforehand so that the fiducial mark and the optical image dividing boundary of each divided image coincide with each other, the photographing is performed, and the fiducial mark is displayed on each divided screen of the display device. And adjusting the display device in advance so that the two images coincide with each other, displaying each of the divided images, and performing image synthesis.