JPH0678338A - Stereoscopic photographic device - Google Patents

Abstract

PURPOSE:To record and reproduce a stereoscopic picture through the use of a single optical system by forming a picture having a parallax on a film, converting the picture into a digital video signal after development processing and recovering stereoscopic information through the use of processing parameter. CONSTITUTION:A film subject to exposure and magnetic recording is developed and recording information such as pitch information of a lens array is read from a magnetic recording area and the information is processed by a reproduction circuit 41 and the result is fed to a correlation detection circuit 25. Succeedingly light information of one row at an image of the film is read by a line sensor 21. The read video signal is converted into a digital value by an A/D converter 23 and stored in a memory 24. In this case since adjacent rows correspond to a picture obtained from a field angle, each row is recorded in each memory area alternately as pictures R, L. The pictures R, L are divided into small areas and depth information is calculated by an arithmetic operation circuit 26. A display circuit 27 generates a contour line expression of the image of the object or its perspective view based on the depth information and the result is displayed on a monitor 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic photographic device for recording / reproducing an image accompanied by stereoscopic information of a subject.

[0002]

2. Description of the Related Art As a stereoscopic image recording / reproducing system, a stereo photographing system is usually used. This is performed by using two sets of cameras 100 and 102 as shown in FIG.
04 from different positions and the respective images 108
L and R are made to be observed only by the left eye and the right eye, for example, by using special glasses 106 using a polarizing element. In this way, an image with parallax is observed to give a stereoscopic effect.

[0003]

However, the above method has a problem that two sets of cameras and optical systems are required as an image pickup device, and the device becomes large and expensive.

The stereoscopic photographic device of the present invention has been made in view of such problems, and its purpose is to record an image having stereoscopic information by using a single optical system.
The object is to provide a small and inexpensive stereoscopic photographic device by reproducing.

[0005]

In order to achieve the above object, the stereoscopic photographic device of the present invention has a main lens for forming a subject image on a film and an image having a parallax on the film. A condensing optical element array provided in front of the film, a camera equipped with a recording mechanism for recording a predetermined parameter in a magnetic recording area of the film, and an image of the film after development processing are converted into a digital video signal. The reproducing apparatus includes a converting means and a processing means for performing processing for recovering stereoscopic information using the digital video signal and a predetermined parameter recorded in the magnetic recording area of the film.

[0006]

That is, in the stereoscopic photographic device of the present invention,
An image having a parallax is formed on a film, the image formed on the film after development processing is converted into a digital video signal, and a stereoscopic image is formed using the digital video signal and a predetermined parameter recorded in a magnetic recording area of the film. Recover information.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, an image having parallax is recorded on the film by providing a condensing optical element array such as a lenticular lens array in front of the exposed surface of the film. That is, in FIG. 1, the parallax of A and B occurs between the image recorded at the point a and the image recorded at the point b.

The image thus recorded is sampled at the positions of a and b at the time of reproduction,
Images from the A and B directions are obtained. By locally obtaining the correlation between the images, the parallax amount between them can be obtained, and the depth information can be obtained from this.

2 and 3 are block diagrams showing a first embodiment of the present invention. In FIG. 2, 10 is a camera body, 11 is a main lens, 12 is a cylindrical lens array, 13 is a film, and 14 is a magnetic head. , 15 are magnetic recording circuits, and 17 is a subject. Further, in FIG. 3, reference numeral 20 is a reproducing apparatus main body, 21 is a line sensor, 22 is an amplifier circuit, and 23.
Is an analog-digital converter (A / D), 24 is a buffer memory, 25 is a correlation detection circuit, 26 is an arithmetic circuit, 27 is a display circuit, 28 is a digital-analog converter (D / A),
Reference numeral 29 is a film driving motor, and 30 is an image display monitor.

The operation of the camera shown in FIG. 2 will be described. The subject image projected by the main lens 11 becomes an optical image modulated by the direction of the incident optical axis for each section of the pitch P by the cylindrical lens array 12, and the film 13 is exposed. In the magnetic recording area of the film 13, the magnetic recording circuit 15 and the magnetic recording head 14 record information indicating that the image is a stereo image using the cylindrical lens array 12 at the time of film winding and the information of the pitch P of the cylindrical lens array 12. To be done.

The exposed and magnetically recorded film is developed and set in a reproducing machine. In the reproducing apparatus of FIG. 3, first, the information recorded by the reproducing magnetic head 40 is read from the magnetic recording area of the film 13,
Processing such as amplification is performed by the reproduction circuit 41 and sent to the correlation detection circuit 25. Then, the line sensor 21 reads the lightness information of one row of the image of the exposed film. That is, the column information is read one after another while being driven by the film driving motor 29 in steps of 1/2 of the pitch P. The read video signal is subjected to processing such as amplification and noise removal in the amplifier circuit 22, and is converted into a digital value by the analog / digital converter (A / D) 23. The digitized signal is the buffer memory 24
Recorded in. At this time, since the adjacent columns correspond to the images obtained from the viewing angles A and B, respectively, by alternately recording the columns in the respective memory areas as the images R and L, two images having different viewing angles can be obtained. Is obtained in the memory area.

The images R and L thus obtained are divided into small regions X _R and X _L , and a shift (parallax) between the images L and R is generated.
Is required. That is, the divided regions X _R and X as shown in FIG.

Is calculated as an evaluation function in the correlation detection circuit 25, and a shift amount S ₀ that minimizes the evaluation value when X _R is shifted right and left by S is obtained as a parallax value.
The above processing is performed on the entire area of the image, and the shift amount S ₀
A map of is obtained. Here, the area where S ₀ is large is the near point,
An area having a small S ₀ is a far point, and its distance is obtained from a geometrical relationship, and image depth information is obtained. The above processing is performed in the arithmetic circuit 26.

Based on the obtained depth information, a contour line display of the subject image or a perspective projection view is created by the display circuit 27, and the digital-analog converter (D / D / D / D) is used.
In A) 28, it is converted into an analog video signal and displayed on the monitor 30.

FIGS. 5 and 6 are block diagrams of the second embodiment of the present invention. In the camera 50 of FIG. 5, the lenticular lens array 16 is used as the condensing optical element array. Further, in the reproducing device 60 of FIG. 6, the relay lens 31 and the area sensor 32 are used for reading the film image.
Is used. The other components are indicated by the same numbers as in the first embodiment, and the explanations are omitted.

The operation of the above configuration will be described below. In the camera 50, the subject image projected by the main lens 11 becomes an optical image modulated by the direction of the incident optical axis by the lenticular lens array 16, and the film 13
To expose. That is, the center of the lenticular lens array 16 corresponds to the vertical optical axis, and the periphery thereof shows an incident image in an oblique direction. In the magnetic recording area of the film 13, information indicating that the image is a stereo image using the lenticular lens array 16 at the time of winding the film and information on the pitch d of the lenticular lens array 16 are recorded.

The exposed and magnetically recorded film is developed and set in the regenerator 60 shown in FIG. Regenerator 6
At 0, first, the information recorded by the reproducing magnetic head 40 is read from the magnetic recording area of the film 13, processed by the reproducing circuit 41 such as amplification, and sent to the correlation detecting circuit 25. Then, the image of the exposed film is projected onto the area sensor 32 by the relay lens 31. Here, the projection magnification is such that the pitch d of the lenticular lens array 16 is twice the pixel pitch of the area sensor 32 (FIG. 7).

The video signal read by the area sensor 32 is subjected to processing such as amplification and noise removal by the amplifier circuit 22,
It is converted into a digital value by the analog-digital converter (A / D) 23.

The digitized signal is a buffer memory 2
4 is recorded, but at this time, e. f. g. h
Corresponding to the pixel position of the four images E. F. G. Subsampled to H. The image thus obtained is divided into small areas, and the parallax in the horizontal direction is obtained from the correspondence between the images E and F, G and H, and the parallax in the vertical direction is obtained from the correspondence between E and G, F and H. As the method of obtaining the parallax, the sum of squares or the sum of absolute values of the difference values of the pixels is used as the evaluation value as in the previous embodiment. Image depth information can be obtained from the obtained horizontal and vertical shift amounts. In this embodiment, parallax in both horizontal and vertical directions can be obtained, so that depth information can be obtained more accurately.

Although the lenticular lens array or the cylindrical lens array is used in this embodiment, it may be replaced with a pinhole array or a slit row.

[0021]

As described above, according to the present invention, a stereoscopic image can be recorded / reproduced by using a single optical system. Therefore, the structure of the photographing device can be simplified, and the size and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the outline of the present invention.

FIG. 2 is a diagram showing a configuration of a camera according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a regenerator in the first embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of FIG.

FIG. 5 is a diagram showing a configuration of a camera according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a regenerator according to a second embodiment of the present invention.

FIG. 7 is a diagram for explaining the operation of FIG.

FIG. 8 is a diagram showing a configuration of a conventional stereoscopic photography device.

[Explanation of symbols]

10 ... Camera body, 11 ... Main lens, 12 ... Cylindrical lens array, 13 ... Film, 14 ... Magnetic head, 15 ... Magnetic recording circuit, 20 ... Reproduction machine body, 21 ... Line sensor, 22 ... Amplification circuit, 23 ... A / D, 24 ... Buffer memory, 25 ... Correlation detection circuit, 26 ... Arithmetic circuit,
29 ... Motor for driving film, 30 ... Monitor for image display.

Claims (1)

[Claims] 1. A main lens for forming a subject image on a film, a condensing optical element array provided in front of the film for forming a parallax image on the film, and a magnetic recording area of the film. A camera equipped with a recording mechanism for recording predetermined parameters, a conversion unit for converting an image of a film after development processing into a digital video signal, and a predetermined unit recorded in the magnetic recording area of the digital video signal and the film. A stereoscopic photographic device, comprising: a reproducing device having a processing means for performing a process of recovering stereoscopic information using the parameters of.