JPH11332832A - Ophthalmic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily synthesize images with each other by providing a recording means which records respective photographed images in order conforming to a specified photographing order, and at the same time, records data to show the location of the part of a photographed fundus oculi, and a means which displays the location data and respective images on a display means. SOLUTION: A fundus oculi is photographed in order, and a photographing angle by which the photographing has been performed, and a mark are written on the image, and the image is recorded on a recording device 25. After the photographing is completed, i.e., before a panorama image is synthesized, the images which are recorded on the recording device 25 are read by the operation of a keyboard 26, and a desired image is read and displayed on a display 28. Then, when the image is displayed, the photographing angle is displayed as well, and which one is the fundus oculi image can be judged. By this method, a rough panorama image can be easily built up on the display 28. In addition, when the panorama image is synthesized, the positional relationship of respective images is clear, and the synthesizing can be performed without making mistakes in the synthesizing locations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus for photographing different portions of the fundus and photographing the entire fundus.

[0002]

2. Description of the Related Art Conventionally, for example, when imaging the fundus with an ophthalmologic apparatus, since the angle of view of the ophthalmologic apparatus is approximately 50 degrees, it is impossible to image the entire fundus with a single imaging. For this reason, the entire fundus is imaged by continuously imaging the fundus so that a part of the fundus overlaps while shifting the imaging position of the fundus.

[0003] Then, several points in an overlapping portion of one captured fundus image and another captured fundus image are plotted respectively, and the points are matched to synthesize an image. Is performed in the same manner to combine the images to create a panoramic image. A continuous whole fundus image is obtained from this panoramic image.

[0004]

However, since it takes time to create a panoramic image and cannot be easily referred to immediately after shooting, it is easy to create a panoramic image by roughly combining the images. You may want to refer to it. However, since information indicating which part of the fundus was captured is not entered in each image, there is a problem that it is difficult to determine which part of the fundus each image represents.

[0005] Further, there is a problem that, when synthesizing a panoramic image, the synthesizing position is mistaken because there is no positional information.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to easily combine images by obtaining position data of the taken images together with the images. It is an object of the present invention to provide an ophthalmic apparatus capable of performing the above-mentioned operations.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a photographing means for photographing different portions of the fundus in a predetermined order, and a method for photographing each image photographed by the photographing means in a predetermined photographing order. And recording means for recording position data indicating the position of the photographed fundus portion, and means for displaying the position data and each image on a display means. I do.

[0008]

According to the present invention, with the above-described configuration, it is possible to obtain position data of each photographed image together with the image, and to easily combine the images.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an ophthalmologic apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a photographing optical system (not shown).
A camera body provided with a lens barrel 3 holding an objective lens 2 and the like, and a guide portion 4 is provided on a side portion 1a of the camera body 1. The guide portion 4 is engaged with the guide rail 15 erected and is movable along the guide rail 15.

The guide rail 15 is curved with a curvature centered on the eye E to be inspected.
When the camera body 1 is moved along, the camera body 1 is configured to rotate with the optical axis 2a of the photographing optical system facing the eye E. This rotation is performed by the motor 5, and the amount of the rotation is detected by the encoder 6.

The guide rail 15 is held by a rotating shaft 7, and the rotating shaft 7 is attached to an arm 9 provided on a gantry 8 so as to be rotatable around a vertical axis H thereof.

The rotating shaft 7 is provided with an arm 10 extending in the horizontal direction. The tip of the arm 10 extends in a direction perpendicular to the paper surface, that is, in a horizontal direction as shown in FIG. An extended guide plate 11 is provided. A roller 13 rotated by a motor 12 abuts on the lower surface of the guide plate 11, and when the roller 13 rotates, the guide plate 11 moves in a direction perpendicular to the paper surface and the rotation shaft 7 rotates. It has become.

The camera body 1 is rotated by the rotation of the rotation shaft 7.
As shown in FIG. 2, the subject eye E is rotated in the horizontal direction about the anterior segment Ea. This rotation amount is detected by the encoder 14. Reference numeral 16 denotes an external fixation lamp for fixing the line of sight of the eye E to be examined.

FIG. 3 is a block diagram showing a configuration of a control system of the ophthalmologic apparatus. In FIG. 3, reference numeral 21 denotes an image pickup device (photographing means) for photographing a fundus image formed by the above-mentioned photographing optical system. Reference numeral 23 denotes a frame memory for storing images captured by the image sensor 21, and reference numeral 24 denotes a tilt angle (photographing angle), which is the amount of rotation of the camera body 1, from the number of pulses output from the encoders 6 and 14, and calculates the photographing angle This is a control device which writes the position data indicating the portion of the fundus oculi formed in the peripheral portion (mask image M shown in FIG. 5) of the image stored in the frame memory 23 and causes the recording device 25 to record the image. Further, the control device 24 writes marks Ma to Mh indicating another image at the position of the mask image M.

The control device 24 and the frame memory 2
3 constitutes combining means for combining the position data with the image.

The control device 24 is composed of a microcomputer or the like, and has an image 6 displayed on a display (display means) 28 described later by a keyboard (mark selection means) 26 and a mouse (mark selection means) 27.
Clicking on one of the marks Ma to Mh, the mark Ma
The image corresponding to .about.Mh is read from the recording device 25, and the read image is displayed on a display, and various other controls are performed. Reference numeral 28 denotes an image or a recording device (recording means) 25 stored in the frame memory 23.
Is a display for displaying an image or the like stored in the memory.

Next, the operation of the embodiment configured as described above will be described.

First, the eye E to be inspected is fixed by the external fixation lamp 16 or the like so as to face in a fixed direction regardless of the movement of the camera body 1, and after the camera body 1 and the eye E to be examined are aligned. Then, the motors 5 and 12 are driven to position the camera body 1, for example, at the position shown in FIG. That is, when the optical axis Eo of the eye to be examined matches the optical axis 2a of the photographing optical system, the camera body 1 is set in a state of photographing the central portion 50 of the fundus Er as shown in FIG.

Next, the joystick switch 22 is pressed. As a result, the central portion of the fundus Er is photographed by the image sensor 21 and the photographed image is stored in the frame memory 2.
3 is stored.

As shown in FIG. 5, a fundus image 60 and a mask image M formed by a mask (not shown) provided in a photographing optical system (not shown) are formed on the image pickup device 21. Is stored in the frame memory 23.

On the other hand, the encoders 6 and 14 are connected to the camera body 1.
The control device 24 detects the angle of rotation of the camera body 1 according to the amount of rotation, that is, the optical axis Eo of the subject's eye E.
Is calculated, and this photographing angle is written in the frame memory 23. This writing position is a portion of the mask image M as shown in FIG.

Since the photographing angle is zero with respect to the optical axis Eo in the horizontal and vertical directions, the controller 2
No. 4 writes the position data “Angle 00 • 00” and also writes marks Ma to Mh indicating other images in the mask image M portion. Then, the image 61 shown in FIG. 5 is displayed on the display 28 and recorded on the recording device 25.

Next, the motor 12 is driven to move the lens barrel 3 together with the main body 1 to the right in the horizontal direction as shown in FIG.
The optical axis 2a of the photographing optical system is directed from the central portion 50 of the fundus Er to the left portion 51 shown in FIG. At this time, the encoder 14 generates a number of pulses corresponding to the amount of rotation, and the control device 24 counts the number of pulses to obtain a horizontal shooting angle of the main body 1. This angle is, for example, 30
At this time, the control device 24 stops driving the motor 12.

When the driving of the motor 12 is stopped, the joystick switch 22 is pressed. Thereby, the portion 51 of the fundus Er shown in FIG.
2 is stored in the frame memory 23 as shown in FIG. In the frame memory 23, "Angle 00/30" is written at the position of the mask image M in the same manner as described above. Further, marks Ma to Mh indicating other images are also written in the mask image M. In this case, the marks Ma to Ma shown in FIG.
For Mh, for example, the mark Mg indicates the image 61. In addition, the mark Mc shown in FIG. Note that the image corresponding to the mark Mc shown in FIG. 6 does not exist because it is not photographed.

In this manner, the fundus Er is sequentially photographed as shown in FIG. 7, for example, and the photographing angles and marks Ma to Mh are written in the image, and the images 61 to 69 are recorded in the recording device. Record at 25.

After the photographing is completed, that is, before the panoramic image is synthesized, a desired image is read out from the images 61 to 69 stored in the recording device 25 by operating the keyboard 26 and displayed on the display 28. For example, when the image 62 shown in FIG. 6 is displayed on the display 28, the photographing angle is also displayed, so that it is possible to determine which part the fundus image 62a is, and thereby a rough panoramic image is easily assembled on the display 28. be able to. Further, when combining panoramic images, since the positional relationship between the images is clear, the images can be combined without making a mistake in the combining position.

The mark M attached to the mask image M
If a to Mh are clicked by operating the mouse 27 or the keyboard 26, an image corresponding to the position of the mark Ma is displayed.
For example, if the mark Mc shown in FIG. 5 is clicked, the image 62 (the second image taken) shown in FIG. 7 is read out, and this image 62 (shown in FIG. Will be displayed. As described above, by clicking the marks Ma to Mh, the images 61 to 69 obtained by photographing the desired fundus can be switched and displayed on the display 28, so that the operation of calling the desired image is very simple.

The marks Ma to Mh shown in the above embodiment are small diameter circles. However, as shown in FIG. 8, a mark P shown by an arrow may be attached so that the direction of the arrow indicates the position of the image. . Further, as shown in FIG. 9, a square R indicating the positional relationship of the fundus is provided at the upper left, and a mark Q is attached to a part R2 of the square corresponding to the position of the fundus image 62a as shown by oblique lines. By clicking on each of the portions R1 to R9, an image corresponding to the clicked portion R1 to R2 may be read.

In the above embodiment, the camera body 1 is automatically moved using the motors 5 and 12, but the camera body 1 is manually moved and the joystick switch 22 is moved.
The angle of the camera body 1 at the time of pressing may be detected.

In the above embodiment, the encoders 6, 1
The photographing angle is obtained based on the number of pulses output from the shutter 4, but the guide rail 15 and the guide plate have stoppers.
(Not shown), and the camera body 1 is
If the rotation amount is determined, the photographing angle at the position regulated by the stopper can be known, so that the encoders 6 and 14 need not be provided.

FIG. 10 shows another embodiment. In this embodiment, a camera main body 1 is fixed, a plurality of fixation targets 31 to 39 are provided in a photographing optical system. ~ 39
Changes the line of sight of the subject's eye E by turning on the fundus Er.
FIG. 3 is a block diagram illustrating a configuration of a control system of the ophthalmologic apparatus that captures an image of a desired part.

In FIG. 10, reference numeral 40 denotes a fixation target 31-39.
Are sequentially turned on, and the control device 24 writes in the frame memory 23 the photographing angles corresponding to the fixation targets 31 to 39 to be turned on. For example, when the fixation target 31 is turned on, the eye E of the subject E coincides with the optical axis 70a of the imaging optical system 70 as shown in FIG. And the shooting angle is written as “Angle 00 • 00”.

When the fixation target 32 is turned on, the subject's eye E moves to the position shown in FIG.
As shown in FIG. 7, if the positions of the fixation targets 32 to 39 are set in advance so that the angle between the line of sight Eb and the optical axis 70a becomes θ, and θ becomes 30 degrees in advance, as shown in FIG. Fundus Er
Is taken, and the photographing angle is changed to "Angle 0
0 · 30 ”in the frame memory 23. Similarly, when the fixation targets 33 to 39 are turned on, the parts 3 to
As we will be shooting 9, "Angle 30 ・ 30" ...
"Angle-30-30" is written in the frame memory 23. Also in this case, as shown in FIG.
Also write. Then, the image stored in the frame memory is recorded in the recording device 25 in the same manner as described above.

In each of the above embodiments, the photographing angle is written in the image as position data. However, the present invention is not limited to this. For example, "center", "up", "upper right", "lower", etc. It may be written as data to indicate the positional relationship of the images. Alternatively, the position data may be separately recorded in the recording device 25 without being combined with the image, and when the image is called on the display 28, the position data may be displayed on the display 28 at a position independent of the image. Of course it is good.

[0036]

According to the present invention, it is possible to obtain the position data of each photographed image together with the image, and to easily combine the images.

[Brief description of the drawings]

FIG. 1 is an external view showing an external appearance of a main body of an ophthalmologic apparatus according to the present invention;

FIG. 2 is a plan view showing a photographing angle for photographing an eye to be examined;

FIG. 3 is a block diagram showing a configuration of a control system of the ophthalmologic apparatus;

FIG. 4 is a front view of the fundus oculi showing the position of the imaging location on the fundus

FIG. 5 is an explanatory diagram of an image showing a fundus image, a photographing angle, and a mark;

FIG. 6 is an explanatory diagram showing an image when a shooting angle is changed,

FIG. 7 is an explanatory diagram showing a photographing location of a fundus,

FIG. 8 is an explanatory diagram showing an image when an arrow is used for a mark,

FIG. 9 is an explanatory diagram showing an image in the case of using squares instead of marks,

FIG. 10 is a block diagram showing the configuration of another embodiment,

FIG. 11 is a plan view showing the relationship between the line of sight of the subject's eye and the optical axis;

FIG. 12 is a plan view showing the relationship with the optical axis when the direction of the line of sight of the eye to be examined is changed.

[Explanation of symbols]

 21 imaging device (imaging means) 23 frame memory 24 controller 25 recording device 26 keyboard 27 mouse 28 display (display means)

Claims (1)

[Claims] A photographing means for photographing different portions of the fundus in a predetermined order; and recording each image photographed by said photographing means.
An ophthalmologic apparatus comprising: a recording unit that records position data indicating a position of the photographed fundus portion; and a unit that causes a display unit to display the position data and each of the images.