JPH0483484A - Multiplex exposure device for electronic still camera - Google Patents

Abstract

PURPOSE:To simplify circuit constitution, to reduce the number of parts and to attain contiuous multiplex photographing by synthesizing a reproduced video signal inputted from one magnetic head with an inputted video signal and recording the synthesized signal on a magnetic disk by the other magnetic head. CONSTITUTION:This multiplex exposure device is arranged on a position separated on the surface of the magnetic disk 1 for recording video signals only by a distance corresponding to a reference track pitch or integer times the pitch. A video signal Va outputted from an image pickup part 4 for converting a subject image formed by two magnetic heads 2a, 2b for recording and reproducing, a recording/reproducing switching circuit 3 and an optical system into a video signal is synthesized with a video signal Vb reproduced from the magnetic head switched to the reproducing purpose by the circuit 3. An image synthesizing circuit 5 supplies a recording signal Vw to the magnetic head switched to the recording purpose by the circuit 3 and a monitor 6 displays only a synthesized signal Vr. Consequently, the number of parts can be reduced and multiplex exposure can be attained by the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a multiple exposure device for an electronic still camera that is capable of recording and reproducing multiple exposed video signals.

2. Description of the Related Art Conventionally, an apparatus capable of performing multiple exposure photography has been proposed in an electronic still camera that converts a subject image formed by an optical system into an image signal and records it in a storage means such as a magnetic disk.

Examples of such electronic still cameras include the Japanese Patent Application Laid-open No. 5
As described in Japanese Patent No. 7-78286, a subject image formed by an optical system is converted into an image signal and recorded in a storage means, and a first image signal from the storage means or imaging means and the storage means are A third image signal is formed by combining the third image signal with the second image signal from the second image signal by the combining means, and this third image signal is recorded in the storage means, thereby performing multiple exposure.

In this electronic still camera, a multiple-exposed image signal is obtained in a storage means, and this multiple-exposed image can be displayed on a monitor or the like.

``Problems to be Solved by the Invention'' However, the electronic still camera described above requires two independent storage means, has a complicated configuration, and has the drawbacks of being limited in multiple exposures. .

The present invention has been made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a multiple exposure device for an electronic still camera that has a reduced number of parts, has a simple configuration, and is capable of multiple exposure. .

"Means for Solving the Problem" In order to achieve the above object, the present invention provides a magnetic disk for recording video signals, and a magnetic disk at positions spaced from each other at a reference track pitch or an integral multiple of the pitch on this magnetic disk. Two magnetic heads are provided for recording video signals on the tracks of the magnetic disk or reproducing them from the tracks of the magnetic disk, a recording/reproducing switching circuit for switching the magnetic heads for recording or reproducing, and a subject light source. A video signal from an imaging unit or an external source is combined with a video signal reproduced from a magnetic head that is set for playback by the recording/playback switching circuit, and the video signal is set for recording by the recording/playback switching circuit. We propose a multiple exposure device for an electronic still camera that includes an image composition circuit that supplies recording signals to a magnetic head.

"Function" In the above-mentioned multiple exposure device, for example, one magnetic head records a video signal input from an imaging unit, etc. on a track of a magnetic disk, and this recorded video signal is reproduced to be input next. By combining it with a video signal and recording it on another track of the magnetic disk using the other magnetic head,
Multiple exposed video signals can be recorded on other tracks.

If you play it back and view it on a monitor, you can see multiple exposures.

In addition, for multiple multiple exposure images, either define two tracks and alternately record multiple exposure video signals on the same track, or move the magnetic head one track and record the multiple exposure image on the next track. This can be obtained by moving this one track after another and recording a multiple exposure video signal.

"Example" Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a multiple exposure device for an electronic still camera according to the present invention.

The multiple exposure device of this electronic still camera is provided with a magnetic disk 1 for recording video signals, and is provided on the magnetic disk 1 at positions separated from each other by a reference track pitch or an integral multiple of the pitch. Two magnetic heads 2a and 2b for recording and reproducing video signals on tracks
, a recording and reproducing switching circuit 3 that switches the magnetic heads 2a and 2b between recording and reproducing, and an imaging unit 4 that converts the subject image formed by the optical system into a video signal (or a video device that can output still images, etc.) external device 40)
The video signal Va from the above and the video signal vb reproduced from the magnetic head set for reproduction by the recording/reproduction switching circuit 3 are combined, and the recording signal Vw is sent to the magnetic head set for recording by the recording/reproduction switching circuit 3. Image synthesis circuit 5 that supplies
and a monitor 6 that displays only the composite signal Vr.

FIG. 2 is a block diagram showing a specific configuration example of an embodiment of the present invention.

The imaging unit 4 is an optical system composed of lenses, etc.; O. CGD II having a color mosaic filter; and the CGD
The image signal processing circuit 12 converts the electric signal photoelectrically converted in the CCD II into a video signal. It is designed to output a signal.

A video signal from an external terminal 13 connected to the imaging unit 4 or an external device 40 such as a video device capable of outputting still images is supplied to the image synthesis circuit 5.

The image synthesis circuit 5 sends the synthesized video signal to the recording circuit 14.
and is output to the monitor 6.

The recording circuit 14 is configured to process the video signal from the image synthesis circuit 5 and supply it to the first terminal W of the recording/reproduction switching circuit 3. The second terminal R of the recording/reproducing switching circuit 3 is connected to the reproducing circuit 16 and supplies a reproduced video signal to the reproducing circuit 16.

The reproduction circuit 16 is capable of processing the reproduced video signal and supplying it to the image synthesis circuit 5. Recording/playback switching circuit 3
is a switching circuit that connects the second terminal R to the magnetic head 2b when the first terminal W is connected to the magnetic head 2a, or connects the second terminal R to the magnetic head 2a when the first terminal W is connected to the magnetic head 2b. It is.

As described above, the magnetic heads 2a and 2b are provided at positions separated from each other by a reference track pitch or an integral multiple of the pitch, and the track positions are controlled by the head controller 17. Further, the magnetic disk l is rotated by a motor 18, and this motor 1
The rotation of the motor 8 is controlled by a motor controller 19.

Further, the operations of the image synthesis circuit 5, the recording/reproduction switching circuit 3, the head controller 17, and the motor controller 19 are controlled by a control circuit 20 that takes in mode selection and other operation commands and forms control signals.

Although not shown, the control circuit 20 includes a processing device, RAM, RO
It consists of a one-chip computer equipped with M, input/output devices, etc.

The operation of the embodiment configured in this way will be explained below.

First, the magnetic head 2b that traces (n+1) tracks is set for reproduction by the recording/reproducing switching circuit 3, and the magnetic head 2a tracing n tracks is set for reproduction by the recording/reproducing switching circuit 3.
It is assumed that the connection is made for recording purposes. Note that the connection by this recording/reproduction switching circuit 3 may be reversed to the above.

A video signal from the imaging section 4 is input to an image synthesis circuit 5. Since no video signal is recorded on the (n+1) track, the image synthesis circuit 5 is not supplied with the reproduced video signal from the magnetic head 2b, and the video signal from the imaging section 4 is directly transmitted via the magnetic head 2a. It is recorded on the nth track.

Next, the magnetic head 2b tracing (n+1) tracks is connected for recording by the recording/reproducing switching circuit 3, and the magnetic head 2a tracing n tracks is connected for reproducing by the recording/reproducing switching circuit 3.

Then, the recorded video signal is reproduced by the magnetic head 2a that traces n tracks and is supplied to the reproduction circuit 16. The reproduced video signal from the reproduction circuit 16 is supplied to the image composition circuit 5.

At the same time, images to be superimposed (two images) are captured by the imaging section 4 and supplied to the image synthesis circuit 5 as a video signal.

These two video signals are combined in an image combining circuit 5,
The magnetic head 2 receives the recording signal Vw via the recording circuit 14.
Recording is performed on the (n+1)th track of the magnetic disk l using b.

This means that the first multiple exposure has been performed.

When performing multiple exposures even more times, (n+N
The magnetic head 2b for tracing tracks is connected to the recording/reproducing switching circuit 3 for reproduction, and the magnetic head 2a for tracing n tracks is connected for recording by the recording/reproducing switching circuit 3.

Then, the video signal is reproduced from the (n+1) track by the magnetic head 2b, combined with the video signal from the imaging section 4, and recorded on the n-th track, which has been previously erased. This means that a second multiple exposure has been made.

By repeating the above operations, multiple exposures can theoretically be performed an infinite number of times on the two tracks of the magnetic disk I.

According to such an embodiment, only one magnetic disk is required, the configuration is simple and the number of parts is small, and multiple exposures can be theoretically performed an infinite number of times.

Note that in the above embodiment, multiple exposures can be performed many times, but multiple exposures can also be performed many times in the following manner.

That is, after the first multiple exposure recording is performed on the (n+1) track of the magnetic disk 1, the magnetic head 28.2b is advanced by the reference track pitch, and the magnetic head 2a performs the (n+1) multiple exposure recording.
+1) Play the video signal from the track.

Next, this reproduced video signal and the video signal from the imaging section 4 etc. are image-synthesized in the same manner as in the above-mentioned embodiment, and the composite video signal is sent to the magnetic head 2b (n) of the magnetic disk 1.
+1) Record on track number.

By repeatedly recording in this manner, multiple exposures can be made as many times as the total number of video tracks provided on the magnetic disk 1 minus 1.

Although this second embodiment produces the same effect as the first embodiment and reduces the number of times that multiple exposures can be performed, each video track records the video signal of the corresponding number of multiple exposures, so it is not to my liking. You can go back to a particular track and redo the multiple exposure.

Each of the above embodiments allows multiple exposure with a simple configuration and a small number of parts, and moreover, allows multiple exposures to be performed a large number of times.

"Effects of the Invention" As described above, according to the present invention, two magnetic recording/reproducing heads are arranged above a magnetic disk at a constant interval,
Since the reproduced video signal from one magnetic head and the input video signal are combined and recorded on the magnetic disk by the other magnetic head, only one magnetic disk is required as a recording means, and the circuit It has a simple configuration, has a small number of parts, is small and lightweight, and is compatible with conventional formats, making it a multiple exposure device suitable for continuous multiple shooting.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a specific configuration example of the embodiment. 1...Magnetic disks 2a, 2b...Magnetic head 3...Record/reproduction switching circuit 4...Imaging section 5...Image composition circuit 6...Monitor

Claims (1)

[Claims] A magnetic disk for recording video signals is provided on the magnetic disk at positions separated from each other by a reference track pitch or an integral multiple of the pitch, and the video signal is recorded on the track of the magnetic disk, or Two magnetic heads that reproduce data from the track, a recording/reproducing switching circuit that switches the magnetic heads for recording or reproducing, a video signal from the imaging unit or the outside that converts the subject light into a video signal, and the recording/reproducing switching circuit described above. An electronic still camera multiplexer comprising: an image synthesis circuit that synthesizes a video signal reproduced from a magnetic head configured for reproduction, and supplies a recording signal to a magnetic head configured for recording by the recording/reproduction switching circuit. Exposure device.