JPH01291106A - Stereoscopic image recorder - Google Patents

Abstract

PURPOSE:To record stereoscopic image information in an easily utilizable form by recording separately moire pattern information and object information. CONSTITUTION:An image of an object to be photographed on which a moire pattern is superposed is brought to image pickup to an image pickup device 9 which is placed in the rear of a screen 8. Also, an image of an object to be photographed on which an image of a lattice pattern 3 is superposed is brought to image pickup to an image pickup device 12 which is placed on a reflected light path of a half mirror 11, and a signal of the image of the object to be photographed is outputted by a filter 13. By subtracting an output signal of the filter 13 from an output signal of the device 9, moire pattern information is extracted. By recording separately the output signal of the filter 13 and an output signal of a subtracting circuit 14, information of the object to be photographed and moire pattern information can be recorded separately. In such a way, one information is read out arbitrarily, and it is prevented from overlapping of two images to each other and going an image to indistinct. Also, only the moire pattern information is read out arbitrarily, and an analysis of a moire pattern by a computer is executed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a three-dimensional image recording device using moiré topography.

[Conventional technology]

2. Description of the Related Art Three-dimensional image recording devices that utilize moiré topography have been known.

As shown in FIG. 4, this type of device includes an input optical system 1 that projects an image of a first lattice pattern onto a subject A, and a second lattice pattern that superimposes an image of a second lattice pattern on the reflected light from the subject. It basically consists of a reflective optical system 2 that forms an image. The input optical system 1 is composed of a first grating pattern 3, a light source 4, and a lens 5 disposed on the opposite side of the light source 4 through the first grating pattern 3.
The reflective optical system 2 is composed of a lens 6, a screen 8 having a second lattice pattern 7, and an imaging bag [9 for capturing an image formed on the screen 8.

The conventional three-dimensional image recording device described above is capable of forming a subject image on the screen 8 in which a striped pattern (moiré pattern) formed by the first lattice pattern and the second lattice pattern 7 is superimposed, and this image is captured. By photographing with the device 9, a stereoscopic image can be recorded in a recording unit not shown. This type of stereoscopic image recording device is capable of producing a three-dimensional Ii!
! It is applied to detection and quantitative measurement of changes.

[Problem to be solved by the invention]

However, when a subject image with a moiré pattern superimposed on it is recorded, the two images overlap, which not only makes it difficult to see when performing three-dimensional observation of the image or quantitatively measuring the amount of change, but also makes it difficult for computers to This has the disadvantage that it makes it difficult to analyze the moire pattern, and furthermore, it becomes difficult to arbitrarily separate or combine the subject image and the moire pattern, reducing the usefulness of the stereoscopic image information.

The present invention has been made in order to eliminate such drawbacks of the conventional technology, and an object of the present invention is to provide a three-dimensional image recording device that can record three-dimensional image information in a form that is easier to utilize. be.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention arranges a half mirror in a reflective optical system, provides a second imaging device on the reflective optical path, and extracts a first lattice pattern from an output signal of the second imaging device. a filter that removes the component; a subtraction circuit that subtracts the output signal of the filter from the output signal of the first imaging device that captures the image on the screen; and coordinates for two-dimensionally displaying the output signal of the subtraction circuit. The present invention is characterized in that a conversion circuit is provided so that moiré pattern information and subject information can be recorded separately.

[Operation] A subject image on which a moiré pattern is superimposed is captured by a first imaging device disposed behind the screen. On the other hand, a second imaging device disposed on the reflection optical path of the half mirror captures a subject image on which the image of the first lattice pattern is superimposed.

Since the image component of the first lattice pattern is a constant frequency component, it can be removed by a filter, and only the signal of the subject image is output from the filter. On the other hand, only the moiré pattern information can be extracted by subtracting the output signal of the filter from the output signal of the first imaging device.

Therefore, by separately recording the output signal of the filter and the output signal of the subtraction circuit, object information and moiré pattern information can be recorded separately.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is an overall configuration diagram of a three-dimensional image recording device according to the present invention, in which 11 is a half mirror, 112 is a second imaging device,
13 is a filter, 14 is a subtraction circuit, 15 is a coordinate circuit, and other members similar to those shown in FIG. 4 are designated by the same reference numerals.

The half mirror 11 is disposed between the lens 6 of the first reflection optical system 2 and the second grating pattern 7, and the second imaging device 12 is disposed on the reflection optical path. Therefore, this second imaging device i! 12, an image of the subject A on which the image of the first lattice pattern is superimposed is captured.

The filter 13 is connected to the output end of the second imaging device, and the second imaging device! 1st from the signal imaged in 12
The frequency is set so as to remove components of the image of the lattice pattern. Therefore, this filter 13 outputs only the image component of the subject A.

The subtraction circuit 14 receives the output signal 9 of the first imaging device 19.
0 and the output signal 130 of the filter 13 are input,
From the output signal 90 of the first imaging device 9 to the filter 13
The output signal 130 of is subtracted. First imaging device E9
The output signal 90 includes a moiré pattern signal obtained by superimposing the image of the first lattice pattern 3 and the image of the second lattice pattern 7 on the image of the subject A, and the signal of the image of the subject A. are superimposed. Therefore, the subtraction circuit 14
, only the moiré pattern signal is output.

The coordinate conversion circuit 15 converts the moiré pattern signal extracted by the subtraction circuit 14 into coordinates in a form that can be stored in the storage device of the computer. There are various types of coordinate converting circuits, and an example will be explained using a television camera as an example of the imaging device 12. In this case, as shown in FIG. 2, the distance (time) tx, tz, ts . . . from the horizontal scanning synchronization signal, and the number no of the horizontal scanning line based on the vertical scanning start position.

The coordinate positions of signals B and C are specified by nl, n2, . . . .

The output signal (image of subject A) of the filter 13 described above is
The output signal (moiré pattern) of the coordinate converting circuit 15 is recorded in a recording device provided outside the illustration in FIG. 1, and is stored as a database in the storage device of the computer, which is also provided outside the illustration in FIG. 1. . As a result, subject information and moiré pattern information are recorded separately.

FIG. 3 is a block diagram of a recording and reproducing device included in the stereoscopic image recording device, which includes a computer 21, a storage device 22,
It is composed of a recording device 23, a synchronizing device 24, and an adding circuit 25.

The moiré pattern information converted into coordinates by the coordinate conversion circuit 15 is sent to the storage device via the computer 21! 22.

On the other hand, the subject information from the filter 13 is transmitted to the recording device 23.
recorded in Note that as the recording device [23], in addition to an analog recording device such as a video tape recorder, a digital recording device can also be used.

During playback, the moiré pattern information stored in the storage device 22 and the subject information recorded in the recording device 23 are simultaneously read out by the synchronization device M24, and the adder circuit 25
is synthesized by

〔Effect of the invention〕

As explained above, according to the three-dimensional image recording device of the present invention, subject information and moiré pattern information can be recorded separately, so either one of the information can be read out arbitrarily, and two images can be recorded. The images do not overlap and become difficult to see. Furthermore, since only moire pattern information can be read out arbitrarily, moire pattern analysis using a computer is easy. Furthermore, since the subject information and moiré pattern information can be separated or combined as desired, the versatility of each information can be improved.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a three-dimensional image recording device according to the present invention;
Figure 2 is an explanatory diagram explaining the means for converting three-dimensional information into coordinates;
The figure is a block diagram of a recording/reproducing device used in the stereoscopic image recording device of the present invention, and FIG. 4 is an overall configuration diagram of a conventional stereoscopic image recording device. A: Subject, 1: Incident optical system, 2: Reflective optical system, 3: First grating pattern, 4: Light source, 5, 6: Lens, 7: Second grating pattern, 8 Two screens, 9: First imaging device, 11: half mirror, 12: second imaging device, 13
: Filter, 14: Subtraction circuit, 15: Coordinate circuit, 2
1: Computer, 22: Storage device, 23: Recording device, 24:
Synchronizer, 25: Adder circuit. Fig. 1''''-15 1: Incident light system 9: Imaging device 2 of the box I
: Reflective optical system lI: Half mirror 3:
Case 1 ÷ lII' turn 12: Evening 2 imaging device 4: Light source I3: Filter 5
: Lens 1 14: Subtraction circuit 6 : Lens 15: Zen meditation circuit 7 : lI
2 Aito pattern A: 1 rod body 8: Screen 2nd figure Oak 3rd figure 4th figure

Claims (1)

[Claims] an incident optical system having a first grating pattern and a light source for projecting an image of the grating pattern onto a subject;
A stereoscopic image recording device comprising a grid pattern and a screen, and a reflection optical system having an imaging device for capturing an image on the screen, wherein a half mirror is disposed between the subject and the second grid pattern. A second imaging device is provided on the reflected optical path, a filter that removes the first grating pattern component from the output signal of the second imaging device, and an output of the first imaging device that captures the image on the screen. A three-dimensional image recording device comprising: a subtraction circuit for subtracting the output signal of the filter from a signal; and a coordinate conversion circuit for two-dimensionally displaying the output signal of the subtraction circuit.