CN210130812U

CN210130812U - Eyeball protrusion measuring platform based on binocular stereo vision

Info

Publication number: CN210130812U
Application number: CN201920391425.8U
Authority: CN
Inventors: 张靖怡; 姜典转; 黄雅平
Original assignee: Beijing Jiaotong University
Current assignee: Beijing Jiaotong University
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-03-10
Anticipated expiration: 2029-03-26

Abstract

The utility model provides an eyeball prominence measuring platform based on binocular stereoscopic vision, include: an eye image acquisition device and an image processing device; the eye image acquisition device comprises two CCD cameras and an acquisition box, the two CCD cameras are arranged on the bottom surface of the acquisition box, and the periphery of the lens of the two CCD cameras is provided with the same number of near-infrared lamp beads; the eye image acquisition device is used for acquiring a position image of an eyeball; the image processing device is used for analyzing the acquired eyeball position image to obtain the eyeball protrusion degree; through the utility model discloses a platform during operation, the user pastes the opening part of tight collection box with facial portion, makes and does not have external light to disturb in the collection box, and is right through near-infrared lamp pearl it provides the light source to gather the box, adopts two CCD cameras to gather user's eye image, and then with the image transmission who gathers extremely image processing apparatus analysis can measure eyeball prominence portably accurately.

Description

Eyeball protrusion measuring platform based on binocular stereo vision

Technical Field

The utility model relates to an ophthalmology inspection technical field especially relates to an eyeball prominence measuring platform based on binocular stereoscopic vision.

Background

The eyeball protrusion is a forward protrusion of the eyeball due to an increase in the orbital content of the patient, and is also referred to as axial eyeball protrusion. The protrusion of the eyeball is a common orbit disease, and how to measure the protrusion of the eyeball simply and accurately is a medical problem worthy of research.

The current methods for measuring the protrusion degree of the eyeball mainly comprise: common ruler measurement, hurter (Hertel) exophthalmos measurement, and CT scan measurement.

The ordinary ruler measurement method is that a special transparent ruler or an ordinary ruler zero point is placed on the temporal lateral orbital margin, a subject looks straight forward, and the measurer observes the scale of the corneal vertex on the straight ruler (the vertical distance from the temporal lateral orbital margin to the corneal vertex) from the side, namely the exophthalmos degree of the subject. The same method is used to examine both eyes and record, which can only make gross measurements due to the inevitable errors associated with manual measurements.

The measurement of the Hertel (Hertel) eminence is a relatively common and accurate examination method, and the eminence mainly consists of a flat rod with scales and two measuring devices. One gauge is fixed at one end of the flat bar, and the other gauge can freely slide on the flat bar to adapt to different orbital distances, and the value of the orbital distance can be read from the scale of the flat bar. The measurer is attached with a small scale plate and two plane mirrors which are crossed to form an angle of 45 degrees and can respectively reflect the numerical value of the scale plate and the image of the vertex of the cornea. During measurement, a measurer and an examinee sit in a mutually-looking mode, an incisal track of the measurer of the eyeball protrusion meter is embedded in the temporal orbital margin of the examinee, the measurer looks straight forward, and the value corresponding to the corneal vertex in the two plane mirrors is the eyeball protrusion degree. Meanwhile, the distance between the two eye sockets is obtained by the scale on the flat bar, and the distance between the eye sockets and the value of each eyeball prominence are recorded. When tracking and observing, the same orbital distance is taken. This measurement method is low in cost, but is inconvenient to use and difficult to mass-produce.

The CT scan uses the canthus line, i.e. the line from the external auditory canal to the outer canthus of the eye, to perform axial scan, the plane of the ear is completely perpendicular to the examining table, the head is placed right, the left and right sides are completely symmetrical, and the eyes are gazed at the front and the eyes are slightly closed. The position of the eyeball remained still during the scanning process, and the layer is 3mm thick from the top of the orbit to the bottom of the orbit, and 12 layers are continuously scanned. The method has high measurement accuracy, but has high cost and radiation, and is difficult to popularize in routine physical examination.

In recent years, a measurement system combining a computer vision technology has the characteristics of high flexibility, low cost, high precision and real-time display, and the measurement system based on the computer vision technology is widely applied to the fields of depth measurement, navigation, object identification and the like. The development of the technology can effectively solve the work which is difficult to implement by human vision. Thus, the eye-process results can be measured in conjunction with computer-related techniques.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an eyeball protrusion measuring platform based on binocular stereovision to measure eyeball protrusion portably accurately.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model provides an eyeball prominence measuring platform based on binocular stereoscopic vision, a serial communication port, include: an eye image acquisition device and an image processing device;

the eye image acquisition device comprises two CCD cameras and an acquisition box, wherein the two CCD cameras are arranged on the bottom surface of the acquisition box, and near infrared lamp beads with equal quantity are arranged around the lens of the two CCD cameras and are used for providing illumination conditions for the eye image acquisition device to acquire position images of eyeballs;

the image processing device is used for analyzing the acquired eyeball position image to obtain the eyeball protrusion degree;

when the platform works, a user tightly attaches the face part to the opening of the collecting box, so that no external light interference exists in the collecting box, the near-infrared lamp beads are right, the collecting box provides a light source, two CCD cameras are used for collecting eye images of the user, and the collected images are transmitted to the image processing device for analyzing and obtaining the eyeball projection degree.

Preferably, the eye image acquisition device and the image processing device are connected through a USB cable.

Preferably, the collecting box is a hidden box with the periphery and the bottom surface closed, and a clamping groove is formed in the top surface of the hidden box and used for enabling the nose bridge and the forehead of a user to be attached to the collecting box, so that no light enters the collecting box when the collecting box is used.

Preferably, 6 near-infrared lamp beads with the wavelength of 780-1100 nm are installed around the two camera lenses.

Preferably, the two CCD cameras are 1/3-inch color macro cameras with 640 x 320 pixels, and the white balance range is 3200-10000K.

Preferably, the image processing device is a PC, and an image acquisition card is installed in the PC.

By the above technical scheme of the utility model, the utility model provides an outstanding measuring platform of eyeball uses the infrared light as the light source, regards CCD camera as the sensor, can gather clear eye region image, through demarcating two CCD cameras, acquires the internal parameter matrix of two CCD cameras, through solving the internal parameter of two CCD cameras that obtain, utilize MATLAB three-dimensional calibration toolbox to get rotation matrix R and translation matrix T relative to the left camera in two cameras, combine two mesh three-dimensional matching algorithm, can obtain the outstanding measuring result of eyeball of high accuracy; and the utility model discloses a device that measuring platform used is with low costs, can gather enough clear high quality eye region image moreover, and wherein eyelid, pupil and iris can both clearly distinguish, through the utility model discloses a high quality image that the platform was gathered can be used to research such as iris discernment, eye region location and eyelid detection.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of an eyeball protrusion measuring platform based on binocular stereo vision;

FIG. 2 is a schematic diagram of an object of the eyeball protrusion measuring platform based on binocular stereo vision;

FIG. 3 is a schematic view of the internal structure of the eye image capturing device;

FIG. 4 is a schematic view of the platform operation;

fig. 5 is a schematic view of an eye image acquired by the eyeball protrusion measurement platform.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be given by way of example with reference to the accompanying drawings, and the embodiments of the present invention are not limited thereto.

Fig. 1 is a schematic structural diagram of the eyeball protrusion measuring platform based on binocular stereo vision in the embodiment,

fig. 2 is a schematic diagram of an eyeball protrusion measuring platform based on binocular stereovision, and referring to fig. 1 and 2, the platform comprises: eye image acquisition device and image processing device.

Fig. 3 is a schematic diagram of an internal structure of an eye image acquisition Device, and referring to fig. 3, the image acquisition Device includes two Charge Coupled Device (CCD) cameras and an acquisition box, the two CCD cameras are mounted on a bottom surface of the acquisition box, 6 near-infrared lamp beads with a wavelength of 780-1100 nm are respectively mounted around lenses of the two CCD cameras, and 3 near-infrared lamp beads are respectively mounted on and under the lenses of each CCD camera, and are used for providing illumination conditions for position images of eyeballs acquired by the eye image acquisition Device.

And the image processing device is used for analyzing the acquired eyeball position image to obtain the eyeball protrusion.

Fig. 4 is platform working schematic diagram, refers to fig. 4, and the platform during operation, the user pastes the opening part of tight collection box with facial portion, makes and does not have the external light interference in the collection box, and right eye should look at the left side camera, and it is right through near-infrared lamp pearl collection box provides the light source, adopts two CCD cameras to gather user's eye image, and then with the image transmission who gathers extremely image processing apparatus analysis derive the eyeball prominence, schematically, fig. 5 is the eye image schematic diagram that gathers through eyeball prominence measurement platform. It should be noted that, when acquiring an eye image, the user is required to keep the eyeball looking straight forward and stable, otherwise a blurred eye image may be acquired. The collected image data is transmitted to a PC (personal computer) by an image acquisition card to become an editable digital image signal.

The eye image acquisition device is connected with the image processing device through a USB cable. The USB transmission mode is convenient to collect and not easy to distort.

In order to avoid interference during eyeball area image acquisition, a closed acquisition mode and near-infrared light source auxiliary illumination are adopted. The collecting box is a hidden box with the periphery and the bottom surface closed, and a clamping groove is formed in the top surface of the hidden box and used for enabling the nose bridge and the forehead of a user to be attached to the collecting box, so that no light enters the collecting box when the collecting box is used.

The two CCD cameras are 1/3-inch color macro cameras with 640 x 320 pixels, and the white balance range is 3200-10000K. And supplying power to the two CCD cameras by adopting USB direct current 12V.

The image processing device is a PC (personal computer), an image acquisition card is installed in the PC, the PC is configured to be 4G RAM, 64 bit Intel (R) core (TM) i7-4790, and a WIN10 operating system is used.

Those of ordinary skill in the art will understand that: the drawings are merely schematic representations of one embodiment, and the elements shown in the drawings are not necessarily required to practice the invention.

Those of ordinary skill in the art will understand that: the components in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed in one or more devices different from the embodiments. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an eyeball protrusion measuring platform based on binocular stereo vision which characterized in that includes: an eye image acquisition device and an image processing device;

when the platform works, a user tightly attaches the face to the opening of the collecting box, so that no external light interference exists in the collecting box, the near-infrared lamp beads are right, the collecting box provides a light source, two CCD cameras are used for collecting eye images of the user, and the collected images are transmitted to the image processing device for analyzing to obtain the eyeball projection degree.

2. The eyeball protrusion degree measurement platform according to claim 1, wherein the eye image acquisition device and the image processing device are connected through a USB cable.

3. The eyeball protrusion measuring platform according to claim 1, wherein the collection box is a box with a closed periphery and a closed bottom, and the top surface of the box is provided with a clamping groove for fitting the bridge of the nose and the forehead of a user to the collection box, so that no light enters the interior of the collection box when the collection box is used.

4. The eyeball prominence measuring platform according to claim 1, wherein 6 near-infrared lamp beads with the wavelength of 780-1100 nm are installed around the two camera lenses.

5. The eyeball protrusion degree measurement platform as claimed in claim 1, wherein the two CCD cameras are 1/3 inch color macro cameras with 640 x 320 pixels, and the white balance range is 3200-10000K.

6. The platform of claim 1, wherein the image processing device is a PC, and an image capture card is installed in the PC.