JPS6363432A - Stereoscopic television - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention] (Industrial Application Field) The present invention relates to a stereoscopic television equipped with a distance measuring function between any two points in a stereoscopic display.

(Prior Art) As an example of this type of stereoscopic television, X-rays are emitted toward a subject from an X-ray tube with two points separated by a predetermined distance,
By displaying this as a right image and a left image on a monitor in a time-sharing manner, for example, and observing by switching the shutters of the right eye and left eye alternately in synchronization with this display timing, it is possible to perform stereoscopic recognition of the displayed image. There is time-division stereoscopic television.

(Problems to be Solved by the Invention) Incidentally, in the field of medical diagnosis, for example, there is an increasing desire to measure the distance between any two points in a three-dimensional machine.

However, unlike distance measurement when a two-dimensional image is displayed on a monitor, the above three-dimensional image is for the right eye.

Since the principle is to make a 3D image stand out in a space other than the monitor due to the parallax of the left eye, it is not possible to simply specify the positions of two arbitrary points using a cursor etc. Therefore, conventional 3D televisions do not have a distance measurement function. There was no provision for those with this.

The above-mentioned problem is not limited to the time-division type, but is the same in other three-dimensional display technologies, such as a lenticular type or a type using colored glasses.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a 3D television that makes it possible to specify any two points in a 3D machine to be observed and measure the distance between these two points.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a right image corresponding to one point on the stereoscopic display in order to specify any two points on the stereoscopic display.

A bright spot generating unit that generates a total of four bright spots, one on each side of the left image, and the coordinates of the two points in a three-dimensional space including the subject based on the generation position of these bright spots and known geometric parameters. A three-dimensional television is configured by providing a coordinate calculation section that calculates the coordinates of the two points, and a distance calculation section that calculates the distance between the two points based on the coordinates of the two points.

(Function) A stereoscopic television enables stereoscopic viewing by displaying a right image and a left image by utilizing the parallax and afterimage phenomenon of the human eye.

Therefore, if one bright spot is generated on each of the right and left images, one bright spot can be displayed on the stereoscopic display using these two points, and a total of one bright spot will be generated on each of the right and left images. 4
When a bright spot is generated, any two points in the stereoscopic display can be specified.

After identifying two points for distance measurement using the bright spots in the 3D display, the coordinates of these two points (coordinates in the three-dimensional space including the subject) are calculated from the four points in the right image and the left image. It is calculated from the bright spot generation position and known geometric parameters (for example, the distance between X″fa tubes 1 and 1, the distance between the It can be realized.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment in which the present invention is applied to a time-division stereoscopic television, and FIG.
A schematic explanatory diagram showing the relationship between points and bright spots, FIG. 3 (A),
(B) is the first. FIG. 3 is a schematic explanatory diagram showing the positions where bright spots occur in the second field.

The X-ray tube 1 used in this embodiment has two focal points XL and Xll separated by a distance id, as shown in FIG. 3
is an image intensifier (hereinafter abbreviated as 1.1) placed opposite the X-ray tube 1 with the subject 2 in between.
It converts the X-rays that have passed through the subject 2 into light and outputs it.

4.5 are image pickup tubes for L and R, respectively;
The optical images for L and R from 13 are formed respectively, and the video signals thereof are outputted respectively. Incidentally, the horizontal and vertical synchronization of the image pickup tubes 4 and 5 is determined based on the output of a timing controller 8, which will be described later.

The video signal from the image pickup tube 4.5 is sent to a serial converter 6.
The left image and the right image are alternately displayed on the TV monitor 7 based on the output of the timing controller 8.

In addition, a voltage synchronized with the left image and right image switching signals is alternately supplied to the optical shutter 10 and R via the shutter drive unit 9, so that the L and H optical shutters 1O are optically opened and closed. It has become. By using such optical shutters 10 as glasses, it is possible to recognize a three-dimensional image of the subject 2 by also utilizing the afterimage property of the eye.

The above configuration is a conventional configuration for a time-division stereoscopic television, but in this embodiment, the following configuration is added in order to realize a distance measurement function.

The bright spot generator 11 generates one point each on the left image and the right image corresponding to one point on the three-dimensional machine in order to specify two specific points on the three-dimensional machine (two points for distance measurement). A total of four bright spots are generated.

If this bright spot is shown on the plane T,13, as shown in FIG. 2, the bright spot corresponding to the first point A in the subject 2 is Ra,
La (Ra is a bright spot on the right image, La is a bright spot on the left image), and 1 corresponds to the second point B in the subject 2.
Similarly, Rb and Lb are generated as points. Moreover, when the above is shown in the first field, there are bright spots Ra, Rb in the first field constituting the right image, as shown in FIG. 3(A).
is generated, and the second field that constitutes the left image is shown in Figure 3 (
As shown in B), bright spots La and Lb are generated (in this embodiment, it is assumed that the first and second fields constitute one frame). The generation position of this bright spot can be arbitrarily set based on input from the operator. In addition, FIG. 3(A).

As can be seen from (B), the position of the bright spot can be specified by the horizontal and vertical synchronization positions on the scanning line in the field, so the bright spot generator 11 inputs the horizontal and vertical synchronization positions from the timing controller 8 and sets it. horizontal, corresponding to the position
A bright spot is generated at the vertical synchronization position, and this bright spot is superimposed on the video signal.

For example, the coordinate calculation unit 12 takes the X and Y coordinates on the plane on which FIG. The coordinates of arbitrary points A and H in 2 are calculated from the bright point generation position and known geometric parameters.

The distance calculation unit B measures the distance between points A and B based on the coordinates of points A and H from the coordinate calculation unit 12.

The operation of the device configured as above will be explained.

In this example, two
In order to identify a point, a bright spot is generated by the bright spot generating section 11 and superimposed on the video signal.

Here, two points A and B in the subject 2 are the focal point X of the X-ray tube l.
Due to the X-rays generated from L and XR, La above 1.13,
An image will be projected at each point of Ra, Lb, and Rb.

In a time-division stereoscopic television, the point Ra
, Rb is the first field as the right image, and the La1L
b will be projected onto the second field as a left image.

Therefore, the first
．． FIG. 3(A) on the scanning line of the second field.

If the bright points La, Ra, Lb, and Rh shown in (B) are superimposed, the bright points L a + Ra make the bright points Lb, R
h, each point B can be observed as a bright spot in the stereoscopic display.

In this embodiment, two bright spots observed in the stereoscopic display are used as cursors for distance measurement.

For example, when measuring the distance between specific blood vessel parts in a head blood vessel image, the bright spot La is measured while viewing the stereoscopic display image.

Adjust the generation positions of Ra, Lb, and Rb, and measure points A and B.
All you have to do is set it to the desired position.

Next, distance measurement between points A and B will be explained.

To measure this distance, first, the coordinate calculation unit 12 calculates the two points A in the three-dimensional space including the subject 2.

I am looking for the coordinates of B. This coordinate calculation is performed at the bright spot La.
, Ra, Lb, and Rh, and known geometric parameters stored, for example, in a ROM.

Here, for convenience of explanation, it is assumed that points A and B in Fig. 2 have the same X coordinate, and that only the X and Y coordinates are different.As an example, we will explain the procedure for determining the X coordinate of point A, X. do. La, Ra=m can be determined from the information on the occurrence positions of the bright spots La and Ra. On the other hand, as a geometric parameter, the distance between the X-ray tubes 1 and 1.13 is the so-called SID (Source
Image Distance) is constant in the X-ray apparatus as l. Then m x direct di! -x.

From the relationship of Xt = □・1 m+d , the X coordinate of point A can be found.

Hereinafter, the Y coordinate of point A, 1 point BOX, and the Y coordinate can be calculated in the same manner. Note that even if points A and B are not on the same plane, each coordinate can be calculated using the same procedure. The coordinates of point A obtained in this way are (
Xl, yl, 2 +), and the coordinates of point B are (Xz,
)'z, Zz).

Next, the distance calculation unit 13 calculates the distance between points A and B. This distance calculation is easy if the coordinates of points A and B can be obtained from the coordinate calculation unit 12. That is, (x+-xz)"+(y
+-yz)"+(z+-zz)", the actual distance between points A and B can be calculated.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

The X-ray tube 1 for collecting the right and left images is not limited to a stereo X-ray tube having two points, and two X-ray tubes may be used.

In addition, although two picture tubes 4.5 were used in the above embodiment,
One image pickup tube may also be used for R.

By using two image pickup tubes, the number of images taken per unit time with one of the image pickup tubes can be reduced to %, which is advantageous in that the influence of afterimages on the photoconductive film can be minimized.

Furthermore, the present invention is applicable only to a time-division stereoscopic television that displays a right image and a left image in a time-division manner, as in the above embodiments, and views the images stereoscopically using optical shanks that are alternately opened and closed. It can be applied to various known stereoscopic televisions. For example, it is equally applicable to a lenticular system in which a polarized lens is placed on a monitor for stereoscopic viewing, or a system in which images of different colors are displayed as right and left images, and these are viewed stereoscopically through a color filter. be able to.

〔Effect of the invention〕

As explained above, according to the present invention, two points for distance measurement are specified by generating bright spots in the right image and left image in correspondence with arbitrary two points in the stereoscopic display, and these two points are It is possible to provide a stereoscopic television that can measure the distance between two points from the coordinates of .

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment in which the present invention is applied to a time-division stereoscopic television, and FIG.
A schematic explanatory diagram showing the relationship between points and bright spots, FIG. 3 (A),
(B) is the first. FIG. 3 is a schematic explanatory diagram showing the positions where bright spots occur in the second field. 7... TV monitor, 11... Bright spot generating section, 12.
...Coordinate calculation section, 13... Distance calculation section. \Written amendment (voluntary) 1. Indication of the case Patent Application No. 1988-205911 2. Name of the invention 3D television 3. Person making the amendment No. 1-1 Shibaura-chome, Minato-ku, Tokyo] (1) Details Claims column (2) Detailed explanation of the invention column 6 of the specification, content of amendments (1) The claims are corrected as shown in the attached sheet. (2) Insert the following sentence between the fifth and sixth lines of page 12 of the specification. "Furthermore, in the above embodiment, two points (
A total of 4 points (R side) and 2 points (L side) are displayed in the second field, and when viewed as one frame image, two points (A, B) are displayed simultaneously in the three-dimensional aircraft, but When simply measuring the distance between two points, it can also be carried out as follows. That is, first, for any one point (point A) in the three-dimensional machine,
Identify this point A by displaying one point (Ra, La) on the left image, and then specify these two points (Ra, La) as other points in the three-dimensional machine.
Move to the position corresponding to the point (point B) and specify this point B. In this case, an appropriate memory may be provided to store the position of point A when it is specified. It goes without saying that the present invention is applicable not only to X-ray television systems but also to general stereoscopic televisions. ” Claims: In a 3D television that enables stereoscopic recognition of a displayed image by displaying the right edge and left image of an object on a TV monitor, for identifying any two points in a 3D device. , a bright spot generating unit that generates one bright spot on the right edge and one bright spot on the left image, respectively, corresponding to one point in the three-dimensional machine, and the position of the bright spot and known geometric parameters. A three-dimensional television set comprising: a coordinate calculation unit that calculates the coordinates of the two points in a three-dimensional space including the subject; and a distance calculation unit that calculates the distance between the two points based on the coordinates of the two points. John.

Claims (1)

[Claims] In a 3D television that enables stereoscopic recognition of the displayed image by displaying the right and left images of the subject on a TV monitor, in order to specify any two points on the 3D display, A bright spot generating unit generates a total of four bright spots, one point each on the right image and the left image, corresponding to one point, and the position of the bright spot and known geometric parameters, A three-dimensional television comprising: a coordinate calculation unit that calculates the coordinates of the two points in a three-dimensional space including the coordinates of the two points; and a distance calculation unit that calculates the distance between the two points based on the coordinates of the two points. .