KR100261609B1 - A video presenter for an eye examination - Google Patents

Abstract

PURPOSE: A video presenter for examining an eyeball is provided, to allow the image of pupil to be displayed in center on screen without operating a pan/tilt button or a zooming button. CONSTITUTION: The video presenter comprises a lens part(1) which comprises an optical system(11) for imaging the image of an eyeball and an image output element(12) for outputting the electrical signal corresponding to the image of an eyeball; a signal processing part(3) which processes the signal output from the lens part, converts it into an image capable of being reappeared and outputs it the corresponding image signal; a control part(4) which senses the image of pupil of an eyeball according to the image signal output from the signal processing part, outputs the corresponding pan/tilt driving signal to allow the sensed image of pupil to be placed in the center of a screen, and outputs the corresponding zooming signal to allow the sensed image of pupil to be displayed on screen by the set percentage or more; a pan/tilt driving part(5) which moves the lens part(1) up and down or left and right according to the pan/tile driving signal; and a zooming part(6) which moves the optical system(11) to the wide part or the tele part according to the zooming signal. The image signal is composed of two-dimensional arrays, and the control part compares the image signal corresponding to the arrays. The control part determines the part where the compared value changes over the set value to be the boundary between of a pupil and the whites of an eye, the part where the value is more than the set value to be a pupil, and the part where the value is less than the set value to be the whites of an eye.

Description

Physical burner for eye examination

The present invention relates to a physical imager for eye examination, and more specifically, to inspecting a patient's eye using the physical imager, the pan / tilt of the lens unit is automatically positioned so that the patient's pupil is located on the center of the screen. The present invention relates to an eye imager for performing eye examination.

In general, an imaging apparatus using a CCD element converts an optical image into an electrical signal and outputs the converted image, and the output signal is transmitted to a display device such as a monitor or a television and reproduced as an image.

Recently, the use of a video presenter for reading an image of a subject placed on a stage and reproducing it through a TV or the like which is a separate image display device has been increased. In seminars mainly in the field of education, advertising / design, and medicine, the effect of education is increased by effectively reproducing images corresponding to materials such as three-dimensional objects and color pictorials.

In addition to the seminar, the physical imager is used to examine the eye of the patient, and the image corresponding to the eye of the patient taken by the physical imager is displayed through a display device such as a separate monitor, so that the doctor can examine the patient more easily. Doing.

In the case of conventionally examining a patient's eye using a physical imager, while the user observes the image displayed on the monitor, the user operates the separately mounted pan / tilt button so that the image corresponding to the pupil of the patient is located at the center of the monitor. By operating the zooming button, which is operated separately, the image corresponding to the patient's pupil is displayed in a certain percentage or more of the monitor so that the pupil of the patient to be examined is more accurately reproduced on the monitor. I am trying to.

That is, according to the operation of the pan / tilt button, the control unit operates the pan / tilt driving unit to move the head part corresponding to the camera of the real imager up and down or left and right, so that the image corresponding to the pupil of the patient to be examined is centered on the monitor. To be displayed.

In addition, according to the operation of the zooming button, the control unit drives the zooming part to move the zooming lens of the head part to the tele or wide end, so that the image corresponding to the pupil of the patient is displayed more than 70% of the entire monitor. Be sure to

However, in the conventional real imager as described above, a user, that is, a doctor, must continuously operate a separately mounted pan / tilt button or a zooming button so that an image to be observed is accurately displayed on a monitor.

Therefore, when it is necessary to explain the test results to the patient while examining the eye at the same time, it is not only cumbersome to operate the buttons one by one, but also due to immature operation, the image is not displayed in a desired state, which causes a disadvantage in that accurate examination is not made.

An object of the present invention is to solve the above-mentioned disadvantages, and to inspect the eye using a real imager, the eye pupil is automatically detected and observed without operating a pan / tilt button or a zooming button. The pupil image is displayed at a predetermined portion or more in the center of the display device, to provide a real imager for eye examination that can conveniently observe the correct eye image.

1 is a block diagram of a physical imager for eye examination according to an embodiment of the present invention,

2 is an operation flowchart of an eye imager for eye examination according to an exemplary embodiment of the present invention.

The configuration of the present invention for achieving the above object,

A lens unit including an optical system for forming an eyeball image, and an imaging device for outputting an electrical signal corresponding to the formed eyeball image;

Signal processing means for processing the signal output from the lens unit so as to be reproduced as an original image and outputting a corresponding video signal;

The pupil image of the eyeball is detected according to the image signal output from the signal processing means, and a corresponding pan / tilt driving signal is output so that the detected pupil image is located at the center of the screen, and the detected pupil image is set on the screen. Control means for outputting a corresponding zooming signal to be displayed abnormally;

Pan / tilt driving means for performing pan / tilt operation by moving the lens part vertically or horizontally according to the pan / tilt driving signal;

And a zooming means for moving the optical system of the lens unit to a wide end or a tele end according to the zooming signal,

The image signals are formed in a two-dimensional array, and the control means compares the image signals corresponding to the two-dimensional array, respectively, and maintains constant values and compares portions of the eyeball with the pupil of the eyeball. The pupil of the eyeball image is detected by determining the boundary of the white, and determining that the part of the eye that is above the set value is the part that corresponds to the pupil.

By the above configuration, the most preferred embodiment that can be easily carried out by those skilled in the art with reference to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a physical imager for eye examination according to an embodiment of the present invention;

2 is an operation flowchart of an eye imager for eye examination according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of the real imager for eye examination according to the embodiment of the present invention corresponds to an optical system 11 for forming an image corresponding to an eyeball and an image formed by the optical system 11. A lens unit 1 comprising an CCD unit 12 for outputting an electrical signal, and an A / D conversion unit 2 connected to an output terminal of the lens unit 1 for converting and outputting a photographed signal into a digital signal And a signal processing unit 3 which is connected to an output terminal of the A / D conversion unit 2 and outputs the processed digital signal as an RGB signal so as to reproduce the original image, and controls the image processing operation. According to the applied RGB signal, it detects the pupil image of the eyeball, outputs the corresponding pan / tilt driving signal so that the detected pupil image is located at the center of the screen, and the detected pupil image is displayed on the screen by a certain percentage or more. Zoom as much as possible A microcontroller 4 for outputting a signal, a pan / tilt driver 5 for moving the lens unit 1 up and down, left and right according to a pan / tilt drive signal output from the microcontroller 4, and the micro A zooming unit 6 for moving the optical system 11 of the lens unit 1 to a tele or wide end according to a zooming signal output from the controller 4, and connected to an output terminal of the signal processing unit 3 The output unit 7 outputs an image signal which is an RGB signal to the computer 8.

The operation of the physical imager for eye examination according to the embodiment of the present invention by the above configuration is as follows.

According to the present invention, the pupil part is detected from the image signal of the eyeball to be photographed, and the head part in which the optical system 1 of the real imager is automatically located is positioned at the center of the display device screen and displayed to 70% or more of the screen. Pan / tilt operation to move up and down, left and right, and zooming operation to the tele or wide end of the optical system 1 are performed.

When the eye of the patient is to be examined, the user places the lens unit 1 of the real imager in a position where the eye of the patient can be photographed.

When power is supplied to the real imager at the position described above, the subject image corresponding to the eyeball of the patient is incident through the optical system 11 of the lens unit 1 to form an image on the CCD unit 12, and the CCD unit 2 is A corresponding electric signal is output by photoelectrically changing the image of the formed subject (S110).

The electrical signal output from the lens unit 1 is converted into a corresponding digital signal through the A / D converter 2, and then input to the signal processor 3 to be image-processed to reproduce the original image. .

The image processing operation of the signal processing unit 3 is the same as the image processing operation of the conventional real imager, and the captured digital signal is image processed and converted into a corresponding RGB signal.

The microcontroller 4 detects the pupil of the eye according to the RGB signal of the captured image processed as described above.

In more detail, the image signal to be picked up and processed is formed in a two-dimensional array, thereby comparing the respective x and y values. The values to be compared will change suddenly at the boundary between the white of the pupil and the pupil while maintaining certain values. That is, one side will have a signal value close to white and one side will have a signal value close to black.

For example, the RGB value of the pupil, which is the black part, is (0, 0, 0), and the opposite RGB value is closer to (255, 255, 255), so that the difference is larger than other areas.

A pupil image is detected from an eye image photographed according to the above principle.

First, as shown in FIG. 2A, the microcontroller 4 divides the screen left and right, and then detects the pupil image in the divided left and right areas according to the above-described operations.

The value corresponding to the pupil image detected in the left region is set to L, and the value corresponding to the pupil image detected in the right region is set to R (S120 to S140). The difference value is calculated to determine whether the value is greater than or equal to the set value (S150).

If the difference between the L value and the R value is greater than or equal to the set value, it is determined whether the L value is greater than the R value (S160). If the L value is greater than the R value, the pupil image is determined to be shifted leftward from the center of the screen. In operation S170, a pan / tilt driving signal for moving the lens unit 1 to the right is output.

In addition, when the R value is larger than the L value, the pupil image is determined to be shifted to the right from the center of the screen, and a pan / tilt driving signal for moving the lens unit 1 to the left is output (S180).

According to the pan / tilt driving signal, the pan / tilt driving unit 5 adjusts the lens unit 1 to the left and right, so that the pupil image is positioned at the center of the left and right of the screen.

The microcontroller 4 performs the tilt adjustment as shown in the accompanying FIG. 2B, similarly to the pan adjustment.

That is, the screen is divided up and down, and the pupil image is detected in the divided upper and lower regions according to the pupil image sensing operation.

The value corresponding to the pupil image detected in the upper region is set to T, the value corresponding to the pupil image detected in the lower region is set to B, and the difference between the measured T value and the B value in each region is calculated. It is determined whether the value is greater than or equal to the set value (S190 to S220).

If the difference between the T value and the B value is greater than or equal to the set value, it is determined whether the T value is larger than the B value (S230). If the T value is larger than the B value, the pupil image is determined to be biased upward from the center of the screen. In operation S240, a pan / tilt driving signal for moving the lens unit 1 downward is output.

In addition, when the B value is larger than the T value, it is determined that the pupil image is biased downward from the center of the screen, and a pan / tilt driving signal for moving the lens unit 1 upward is output (S250).

According to the pan / tilt driving signal, the pan / tilt driving unit 5 adjusts the lens unit 1 up and down, so that the pupil image is positioned at the center of the top and bottom of the screen.

According to the above pan / tilt adjustment, the pupil image is positioned at the center of the screen.

Next, the microcontroller 4 controls the zooming operation, as shown in FIG. 2C attached so that the pupil image is displayed over a certain percentage of the screen.

The microcontroller 4 measures the distribution of the pupil image in the eyeball image photographed according to the pupil image detection operation (S260), and then adjusts the zooming unit 6 such that the detected pupil image is 70% or more of the entire screen. Drive it.

More specifically, when the c value according to the pupil image measurement of the photographed eye image is smaller than the minimum value, the corresponding zooming signal is output so that the optical system 1 moves to the wide end (S270 to S280).

As the zooming unit 6 moves the optical system 1 to the wide end according to the zooming signal, the pupil image to be photographed is expanded.

On the contrary, when the C value is larger than the maximum value, the corresponding zooming signal is output so that the optical system 1 moves to the tele end (S290 to S300).

As the zooming unit 6 moves the optical system 1 to the tele end according to the zooming signal, the pupil image to be photographed is reduced.

As described above, the pupil of the eyeball photographed is detected, and the pan / tilt adjustment and the zooming operation are automatically performed so that the pupil image is positioned at the center of the screen and displayed to 70% or more of the screen.

The eyeball image processed as described above is transmitted to the computer 8 through the output unit 7, and the computer 8 displays the image applied from the real imager on the monitor 9.

Therefore, the user, that is, the doctor, can easily observe the pupil image of the patient to be examined without operating a button.

As described above, according to the exemplary embodiment of the present invention, when examining the eye using a real imager, the pupil image to be observed is automatically detected by observing the pupil of the eye without operating the pan / tilt button or the zooming button separately. By displaying a predetermined portion or more at the center of the display device, the user can more conveniently observe the correct eye image.

Claims (4)

A lens unit including an optical system for forming an eyeball image, and an imaging device for outputting an electrical signal corresponding to the formed eyeball image; Signal processing means for processing the signal output from the lens unit so as to be reproduced as an original image and outputting a corresponding video signal; The pupil image of the eyeball is detected according to the image signal output from the signal processing means, and a corresponding pan / tilt driving signal is output so that the detected pupil image is located at the center of the screen, and the detected pupil image is set on the screen. Control means for outputting a corresponding zooming signal to be displayed abnormally; Pan / tilt driving means for performing pan / tilt operation by moving the lens part vertically or horizontally according to the pan / tilt driving signal; And a zooming means for moving the optical system of the lens unit to a wide end or a tele end according to the zooming signal, wherein the image signal is formed in a two-dimensional array, and the control means is an image corresponding to a two-dimensional array. Comparing the signals, maintaining the values that are compared and changing the value above the set value is determined as the boundary between the pupil and the white of the eyeballs, and the part that is above the set value as the portion corresponding to the pupil and the part below the set value A physical imager for eye examination that detects the pupil image of the eye image taken by judging as a part corresponding to the white. The method of claim 1, wherein the control unit divides the screen of the captured image left and right, detects the pupil image in each of the divided left and right regions, sets a value corresponding to the pupil image detected in the left region, and sets L to the right. When the value corresponding to the pupil image detected in the area is set to R, when the L value is larger than the R value, it is determined that the pupil image is biased to the left from the center of the screen, so that the pan / When the tilt driving signal is output and the R value is larger than the L value, it is determined that the pupil image is deviated from the center of the screen to the right, and a pan / tilt driving signal for moving the lens part to the left is output, and the pupil image is left and right. Physical imager for eye examination to be located at the center of the screen. The method of claim 1, wherein the control unit divides the screen of the captured image up and down, detects the pupil image in each of the divided upper and lower regions, sets a value corresponding to the pupil image detected in the upper region, and sets the lower side to T. When the value corresponding to the pupil image detected in the area is set to B, when the T value is larger than the B value, it is determined that the pupil image is biased upward from the center of the screen, and the pan / When the tilt drive signal is output and the B value is larger than the T value, it is determined that the pupil image is biased downward from the center of the screen, and a pan / tilt drive signal for moving the lens portion upward is output, and the pupil image is vertically up and down. Physical imager for eye examination to be located at the center of the screen. The method of claim 1, wherein the control unit detects the pupil image from the photographed eye image, and outputs a zooming signal for moving the optical system to the wide end when the detected pupil image is less than or equal to a set percentage. And an eye imager for outputting a zooming signal for moving the optical system to the tele end when the pupil image is more than a predetermined percentage.

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