阅读说明：本技术 一种眼科拍照方法 (Ophthalmologic photographing method ) 是由 冯云 肖真 于 2019-05-22 设计创作，主要内容包括：本发明公开了一种眼科拍照方法。所述方法包括：将眼科接触镜放置于拍摄对象上方,眼科接触镜将所述拍摄对象成像后并反射；摄像头拍摄所述眼科接触镜所成像内容。本发明提供的方案采用眼科接触镜对拍摄对象进行成像后并反射,摄像头位于眼科接触镜的反射区域,通过眼科接触镜的反射,摄像头可以拍摄到眼科接触镜反射的范围,在拍摄过程中,通过旋转眼科接触镜,可以扫描整个拍摄对象,从而可以捕捉大范围的成像结果,实现广角拍摄。(The invention discloses an ophthalmologic photographing method. The method comprises the following steps: placing an ophthalmologic contact lens above a shooting object, and imaging and reflecting the shooting object by the ophthalmologic contact lens; the camera shoots the imaging content of the ophthalmic contact lens. According to the scheme provided by the invention, the photographing object is imaged and reflected by the ophthalmologic contact lens, the camera is positioned in the reflection area of the ophthalmologic contact lens, the reflection range of the ophthalmologic contact lens can be photographed by the camera through the reflection of the ophthalmologic contact lens, and the whole photographing object can be scanned by rotating the ophthalmologic contact lens in the photographing process, so that a large-range imaging result can be captured, and wide-angle photographing is realized.)

1. An ophthalmic photographing method, comprising:

placing an ophthalmologic contact lens above a shooting object, and imaging and reflecting the shooting object by the ophthalmologic contact lens;

the camera shoots the imaging content of the ophthalmic contact lens.

2. The ophthalmic photographing method of claim 1, wherein the ophthalmic contact lens is rotated when the camera photographs the contents imaged by the ophthalmic contact lens.

3. An ophthalmic photographing method according to claim 1 or 2, further comprising:

and performing cross-contrast noise reduction on the video or image sequence shot by the camera, and splicing the video or image sequence subjected to the cross-contrast noise reduction treatment to obtain a complete video or image of the shot object.

4. The ophthalmic photographing method according to claim 3, wherein the step of photographing the contents imaged by the ophthalmic contact lens by the camera comprises: and simultaneously acquiring images of a plurality of different focuses of the shooting object by using a plurality of cameras according to the viewpoint tracking.

5. The ophthalmic photographing method according to claim 4, wherein a high frequency portion in a frequency domain is enhanced at the time of the cross-over ratio noise reduction processing, thereby extending a depth of field and keeping an image obtained by the noise reduction processing clear at a plurality of focus positions.

6. The ophthalmic photographing method according to claim 1, wherein the camera includes an illumination light source, wherein the illumination light emitted by the illumination light source includes visible light and invisible light in a wavelength range of ultraviolet to infrared.

7. The ophthalmic photographing method of claim 5, wherein each camera incorporates a polarizer or a portion of the plurality of cameras incorporate a polarizer, wherein the polarizer is disposed on a surface of the illumination source.

8. The ophthalmic photographing method of claim 7, wherein when two cameras among the plurality of cameras add polarizers, the polarizer added to one camera and the polarizer added to the other camera among the two cameras are orthogonal polarizers.

Technical Field

The invention relates to the technical field of eye photographing, in particular to an ophthalmologic photographing method.

Background

The conventional ophthalmologic camera has a small photographing range, and for fundus photographing, the photographing range is generally within 60 degrees, and a special device needs to be held by hand to photograph a room angle. Moreover, the ophthalmic camera is bulky, expensive to manufacture, and not suitable for portability. Even a hand-held ophthalmic camera has a problem of a small imaging range and a high apparatus price.

Therefore, how to increase the imaging range in fundus photography becomes a technical problem that those skilled in the art need to solve.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to provide an ophthalmologic photographing method which can capture a large-range imaging structure and realize wide-angle photographing.

In order to achieve the above object, the present invention provides an ophthalmologic photographing method including:

placing an ophthalmologic contact lens above a shooting object, and imaging and reflecting the shooting object by the ophthalmologic contact lens;

the camera shoots the imaging content of the ophthalmic contact lens.

Preferably, when the camera shoots the content imaged by the ophthalmic contact lens, the ophthalmic contact lens is rotated.

Preferably, the method further comprises the following steps:

and performing cross-contrast noise reduction on the video or image sequence shot by the camera, and splicing the video or image sequence subjected to the cross-contrast noise reduction treatment to obtain a complete video or image of the shot object.

Preferably, the step of shooting the content imaged by the ophthalmic contact lens by the camera comprises: and simultaneously acquiring images of a plurality of different focuses of the shooting object by using a plurality of cameras according to the viewpoint tracking.

Preferably, the high frequency part in the frequency domain is enhanced during the cross-over noise reduction processing, so as to extend the depth of field and keep the image obtained by the noise reduction processing clear at a plurality of focus positions.

Preferably, the camera includes an illumination light source, wherein the illumination light emitted by the illumination light source includes visible light and invisible light in a wavelength range from ultraviolet to infrared.

Preferably, each camera is added with a polarizer or a polarizer is added to a part of the cameras, wherein the polarizer is arranged on the surface of the illumination light source.

Preferably, when two cameras in the plurality of cameras add a polarizer, the polarizer added to one camera and the polarizer added to the other camera in the two cameras are orthogonal polarizers.

According to the scheme provided by the invention, the photographing object is imaged and reflected by the ophthalmologic contact lens, the camera is positioned in the reflection area of the ophthalmologic contact lens, the reflection range of the ophthalmologic contact lens can be photographed by the camera through the reflection of the ophthalmologic contact lens, and the whole photographing object can be scanned by rotating the ophthalmologic contact lens in the photographing process, so that a large-range imaging result can be captured, and wide-angle photographing is realized.

Drawings

Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of an ophthalmic photographing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the ophthalmic photographing apparatus of FIG. 1 at another angle;

FIG. 3 is a schematic sectional view of the eye photographing apparatus of FIG. 1;

FIG. 4 is a schematic top view of the ophthalmic imaging device of FIG. 1;

FIG. 5 is a schematic flow chart of an ophthalmic photographing method according to an embodiment of the present invention;

wherein, in fig. 1-5:

ophthalmic contact lens 1, speculum 11, camera 2, camera fixed casing 3, adapter sleeve 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.

Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of an ophthalmic photographing apparatus according to an embodiment of the present invention; FIG. 2 is a schematic perspective view of the ophthalmic photographing apparatus of FIG. 1 at another angle; FIG. 3 is a schematic sectional view of the eye photographing apparatus of FIG. 1; fig. 4 is a schematic top view of the ophthalmic photographing apparatus of fig. 1.

As shown in fig. 1-4, the ophthalmological photographing apparatus provided by the present invention includes an ophthalmological contact lens 1 and a camera 2, the ophthalmological contact lens 1 is used for imaging and reflecting a photographed object, the ophthalmological contact lens 1 may be a three-mirror, a gonioscope, etc., in a specific scheme, the three-mirror may be a Goldman three-mirror, which is used for fundus examination, the three-mirror has a conical appearance, a concave mirror is provided at a central portion of the three-mirror, a three-mirror 11 is provided in the three-mirror, and the reflected image is seen by the mirror 11; the imaging target in the present application may be the fundus oculi, or may be another imaging target, and the following embodiments describe the present application with the fundus oculi as the imaging target.

The number of the cameras 2 is one or more, and the cameras 2 are used for shooting the imaging content of the ophthalmic contact lens 1, namely the cameras 2 are used for shooting the content reflected by the reflecting mirror 11 in the ophthalmic contact lens 1. If the number of the cameras 2 is multiple, the multiple cameras 2 can form a camera array so as to shoot images reflected by the ophthalmic contact lens 1 from multiple angles; camera 2 can adopt miniature camera 2, and for the convenience of arranging miniature camera, the diameter of miniature camera can be less than 8 millimeters, and miniature camera can be for adopting USB communication protocol's USB camera, and every camera 2 can shoot partly or whole of 1 reflection of ophthalmology contact lens.

According to the scheme provided by the invention, the ophthalmologic contact lens 1 is adopted to image and reflect the shot object, the camera 2 is positioned in the reflection area of the ophthalmologic contact lens 1, the camera 2 can shoot the reflection range of the ophthalmologic contact lens 1 through the reflection of the ophthalmologic contact lens 1, and the whole shot object can be scanned by rotating the ophthalmologic contact lens 1 in the shooting process, so that the large-range imaging result can be captured, and the wide-angle shooting is realized.

The camera 2 is disposed in the imaging light reflection area of the ophthalmic contact lens 1, as shown in fig. 3, the reflecting mirror 11 of the ophthalmic contact lens 1 is disposed in an inclined shape, and the reflecting direction is upward, so that the camera 2 can be disposed above the ophthalmic contact lens 1 in the axial direction.

In a preferred scheme, the device further comprises a camera fixing device for fixing the camera 2, wherein the camera fixing device is arranged above the ophthalmic contact lens 1 in the axial direction, so that the camera 2 is positioned in an imaging light reflection area of the ophthalmic contact lens 1.

In a specific scheme, the camera fixing device is a camera fixing shell 3, and the cameras 2 are arranged and fixed on the camera fixing shell 3 in an array with a preset shape. Camera 2 can block on camera 2 set casing, and camera 2 also can be fixed on camera 2 set casing through modes such as bonding, joint, and camera 2 set casing plays the effect that supports camera 2.

A plurality of cameras 2 arrange with the array of predetermineeing the shape, a plurality of cameras 2 can be square array, rectangular array, or shape such as hemispherical array arranges, the quantity of camera 2 can be 2x2, 3x3, 5x5 or 7x7 etc., can set up fixed casing 3 of camera according to the array shape that a plurality of cameras 2 formed, as shown in fig. 1-4, this fixed casing 3 of camera is hemispherical, a plurality of cameras 2 arrange on hemispherical fixed casing 3 of camera, the content that this kind of structure can all-round each angle shot ophthalmology contact lens 1 reflection.

Of course, those skilled in the art can also arrange the camera fixing housing 3 into a cylindrical housing, a prismatic housing, and all shall be within the scope of the present invention.

The fixed casing of camera 3 can enclose into an enclosure space with ophthalmology contact lens 1, and external environment light's interference can be avoided to this kind of structure, and camera 2 is when shooing, whether turn on the light on every side, whether be located outdoors, all do not influence the shooting effect of camera 2. However, in this structure, the light source on the camera 2 may cause a lot of internal reflection, which affects the imaging quality, and in order to solve the above technical problems, a light absorbing lining may be disposed inside the closed space, a light absorbing lining may be disposed inside the camera fixing housing 3, or a light absorbing lining may be disposed inside the ophthalmic contact lens, so as to reduce the internal reflection generated by the light source on the camera 2 and improve the imaging quality.

The camera fixing device and the ophthalmic contact lens 1 may form an open space, for example, the camera fixing device may adopt a fixing wire, one end of the fixing wire is connected with the camera 2, and the other end of the fixing wire is fixed on the shell of the ophthalmic contact lens 1. A plurality of cameras 2 may be fixed above the ophthalmic contact lens 1 by one fixing wire, respectively. This structure can reduce internal reflection between the cameras 2, improving the imaging effect.

In the preferable scheme, the contact lens device further comprises a connecting sleeve 4, one end of the connecting sleeve 4 is connected with the camera fixing device, and the other end of the connecting sleeve 4 is connected with the upper end of the shell of the ophthalmic contact lens 1. As shown in fig. 3, the ophthalmic contact lens 1 is conical, the camera fixing shell 3 is hemispherical, the connecting sleeve 4 is conical, the upper circular opening of the connecting sleeve 4 is connected with the camera fixing shell 3, and the lower circular opening of the connecting sleeve 4 is connected with the outer edge of the shell of the ophthalmic contact lens 1.

In the preferred scheme, adapter sleeve 4 with for rotatable swing joint between the shell of ophthalmology contact lens 1, when camera 2 was shot, can rotate ophthalmology contact lens 1 to the whole object of shooing of scanning, thereby can catch large-scale formation of image result, realize the wide angle and shoot.

In a specific scheme, an annular sliding groove is formed in the lower edge of the connecting sleeve 4 and clamped on the upper edge of the shell of the ophthalmic contact lens 1, and a rotatable movable connection can be formed between the upper edge of the shell of the ophthalmic contact lens 1 and the annular groove of the connecting sleeve 4.

In a more preferable scheme, balls are arranged in the annular sliding groove, so that a bearing connection is formed between the connecting sleeve 4 and the shell of the ophthalmic contact lens 1, and thus, the sliding resistance of the ophthalmic contact lens 1 can be reduced in the sliding process.

In a preferable scheme, in order to limit the sliding position between the connecting sleeve 4 and the shell of the ophthalmic contact lens 1, a jackscrew for jacking the shell of the ophthalmic contact lens 1 is arranged on the inner cylindrical surface of the connecting sleeve 4, the jackscrew can be a screw, the jackscrew is arranged along the radial direction of the connecting sleeve 4 and penetrates through the connecting sleeve 4, the inner side end of the jackscrew is abutted against the side surface of the shell of the ophthalmic contact lens 1, when the jackscrew is screwed down, the inner side end of the jackscrew is pressed against the side surface of the shell of the ophthalmic contact lens 1, so that the friction force between the two is increased, and the two are fixed with each other.

In the above embodiment, the camera fixing housing 3 and the ophthalmic contact lens 1 are connected by the connecting sleeve 4, but the solution provided by the present invention is not limited to this, and a separate annular bearing may be provided between the camera fixing housing 3 and the ophthalmic contact lens 1, a sliding portion of the annular bearing is connected to the ophthalmic contact lens 1, and a fixing portion of the annular bearing is connected to the bottom of the camera fixing housing 3.

In a preferred embodiment, the annular bearing upper shell is provided with a handle to facilitate rotation of the annular bearing, and in use, the handle is held by one hand of the doctor and the other hand of the doctor can rotate the ophthalmic contact lens 1.

In a specific scheme, the sliding part of the annular bearing and the ophthalmologic contact lens 1 can be connected in a bonding mode, the fixing part of the annular bearing and the bottom of the camera 2 fixing device can be connected in a bonding mode, and the structure does not need to be provided with mounting holes in the annular bearing, the ophthalmologic contact lens 1 and the camera fixing shell 3, so that the mounting cost can be greatly reduced.

In a preferred scheme, the system further comprises a picture processing unit, wherein the picture processing unit performs cross-contrast noise reduction on the video or image sequence shot by the camera 2, and splices the video or image sequence after the cross-contrast noise reduction processing to obtain a complete video or image of a shot object.

When a plurality of cameras 2 are arranged above the ophthalmic contact lens 1, the plurality of cameras 2 can shoot a reflected image of the eye contact lens, each camera 2 shoots a picture or shoots a frame of image, because each region of a shot object is recorded by the plurality of cameras 2 at different angles, the images or videos shot by the cameras 2 need to be subjected to cross-contrast noise reduction according to a certain sequence, for example, noise reduction algorithms such as a variational self-encoder or BM3 are used, and the processing methods of the cross-contrast noise reduction are the prior art and are not described in detail herein.

And splicing the videos or image sequences subjected to noise reduction processing by utilizing the existing image splicing technology to obtain complete videos or images of the shot objects so as to obtain complete wide-angle fundus scanning images.

Preferably, the camera further includes an illumination light source, and the illumination light source may have sufficient redundancy, and as an example, a commercially available USB micro camera usually has six LED illumination lamps (e.g., an infrared LED, a red LED, a green LED, and a blue LED) built therein. When using LED lighting lamps, switching can be done by internal circuitry (i.e. switching different spectrum light sources) to use different lighting needs.

Further, in the plurality of cameras, there may be a dedicated infrared camera or ultraviolet camera, or an infrared light filter or an ultraviolet light filter may be added in front of the cameras. It should be understood that a typical camera CCD has a very wide corresponding wavelength range, from the ultraviolet to the infrared, but that in the presence of visible light, the infrared and ultraviolet imaging portions are not visible.

In a preferred scheme, a polarizer is added to each of the plurality of cameras or a polarizer is added to a part of the plurality of cameras.

In a specific embodiment, the polarizer may be disposed on a surface of the illumination source.

It should be understood that a polarizer may be added to the surface of each of the plurality of cameras, or a polarizer may be added to a portion of the surface of the camera. Assuming only two cameras plus polarizers, orthogonal polarizers, such as horizontal and vertical linear polarizers, or left and right handed circular polarizers, would need to be added. If each camera is added with a polarizer, the polarization planes can be randomly selected, so that the polarization planes are distributed more uniformly. Here, the redundant cameras can be loaded with polarizers of different nature.

Fig. 5 shows a schematic flow chart of an ophthalmic photographing method according to an embodiment of the present invention, where fig. 5 is a schematic flow chart of the ophthalmic photographing method according to the present invention.

As shown in fig. 5, the ophthalmic photographing method provided by the present invention comprises the following steps:

step 101, placing an ophthalmic contact lens above a shooting object, and imaging and reflecting the shooting object by the ophthalmic contact lens;

and 102, shooting the content reflected by the ophthalmic contact lens.

Because the ophthalmologic photographing method adopts the ophthalmologic photographing device for photographing, the ophthalmologic photographing device has the technical effect and the ophthalmologic photographing method also has the corresponding technical effect.

In a preferable embodiment, in step 102, when the camera shoots the content reflected by the ophthalmic contact lens, the ophthalmic contact lens is rotated so that the mirror of the ophthalmic contact lens can scan the whole shooting object, so as to capture a large-range imaging result and realize wide-angle shooting.

In a preferred embodiment, after step 102, the method further includes:

and 103, performing cross-contrast noise reduction on the video or image sequence shot by the camera, and splicing the video or image sequence subjected to the cross-contrast noise reduction treatment to obtain a complete video or image of the shot object.

When a plurality of cameras are arranged above the ophthalmologic contact lens, the plurality of cameras can shoot a reflected image of the ophthalmologic contact lens, each camera shoots a picture or shoots a frame of image, because each region of a shot object is recorded by the cameras at different angles, the images or videos shot by the cameras need to be subjected to cross-contrast noise reduction according to a certain sequence, for example, noise reduction algorithms such as a variational self-encoder or BM3 are used, and the processing methods of the cross-contrast noise reduction are the prior art and are not described in detail herein.

The video or image sequence after cross-contrast noise reduction processing is spliced by utilizing the existing image splicing technology to obtain a complete video or image of a shooting object so as to obtain a complete wide-angle fundus scanning image.

In a specific embodiment, the plurality of images may be subjected to a noise reduction process by a processor.

The same shooting object surface is shot by a plurality of cameras which can have different focal lengths, and the shooting is carried out simultaneously, so the noise reduction processing can be cross comparison (BM3D) noise reduction processing.

In a specific embodiment, the processor is further configured to: and enhancing the high-frequency part in the frequency domain during the cross comparison noise reduction processing, thereby expanding the depth of field and keeping the image obtained by the noise reduction processing clear at a plurality of focus positions.

Optionally, the step of simultaneously acquiring a plurality of images of the photographic subject by a plurality of cameras comprises: and simultaneously acquiring images of a plurality of different focuses of the shooting object by using a plurality of cameras according to the viewpoint tracking.

Optionally, the denoising processing is cross-comparison denoising processing; and enhancing the high-frequency part in the frequency domain during the cross comparison noise reduction processing, thereby expanding the depth of field and keeping the image obtained by the noise reduction processing clear at a plurality of focus positions.

Optionally, the camera includes an illumination source, wherein the illumination light emitted by the illumination source includes visible light and invisible light in a wavelength range of ultraviolet to infrared.

Optionally, a polarizer is added to each of the plurality of cameras or a polarizer is added to a part of the plurality of cameras, wherein the polarizer is disposed on the surface of the illumination light source.

Optionally, the imaging method further comprises: calculating a birefringence characteristic parameter of the photographic object, wherein the birefringence characteristic parameter is used for representing the stress change of the photographic object; wherein the step of displaying the processed image comprises: and displaying the processed image and the birefringence characteristic parameter.

Optionally, when two cameras of the multiple cameras add a polarizer, the polarizer added by one camera and the polarizer added by the other camera of the two cameras are orthogonal polarizers.

In this case, the ophthalmic photographing method further includes: and calculating the birefringence characteristic parameter of the shooting object.

Here, the birefringence characteristic parameter is used to characterize a stress change of the photographic subject.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.