CN215017002U

CN215017002U - Polarization imaging endoscope

Info

Publication number: CN215017002U
Application number: CN202120563121.2U
Authority: CN
Inventors: 蒋艳荣; 黄碧尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-12-07
Anticipated expiration: 2031-03-18

Abstract

A polarization imaging endoscope system, its technical scheme main points are, include: the device comprises a light source, an optical imaging lens, a polarization generating device, an image acquisition device and an image processing host; the polarization generating device is arranged between the light source and the optical imaging lens or between the optical imaging lens and the image acquisition device; and after receiving the images with different polarization directions acquired by the image acquisition device, the image processing host identifies the over-exposure area and then fuses the images. The purposes of high imaging speed, clear image, uniform and appropriate exposure and more contribution to operation or observation are achieved.

Description

Polarization imaging endoscope

Technical Field

The utility model belongs to the technical field of the endoscope formation of image, concretely relates to polarization imaging endoscope system.

Background

Modern surgical operations are minimally invasive, and an endoscope serving as an important tool of the minimally invasive operations can enter a human body cavity and transmit images shot in the human body to a screen in real time for an operation or an examination doctor to observe.

As shown in fig. 1, the conventional endoscopic imaging system is mainly configured by: the system comprises an optical endoscope 01, an optical lens 02, a camera module 03, an image processing host 04, a cold light source 05 and an image display 06. The optical endoscope 01 is used for optical imaging of tissues in a cavity body, and the optical lens 02 is used for connecting the optical endoscope 01 and realizing optical zooming and focusing functions; the camera module 03 receives optical imaging transmitted by the optical endoscope 01 and the optical lens 02, performs photoelectric conversion through an image sensor in the camera module, converts an optical imaging signal into a digital image signal, and transmits the converted electric signal to an image processing host computer to perform image processing on the image signal; the image display part is used for displaying images on a display screen or other display equipment for a user to observe. The optical illumination portion is used for providing illumination for imaging.

When the existing endoscope imaging equipment is used, the problem of overexposure often occurs due to specular reflection generated by the smooth inner surface of the cavity, and in an overexposed area, details of the local part of the cavity cannot be received and displayed due to saturation of the sensor. The judgment of the doctor on the structures of the focus and the like can be influenced on the clinical observation.

For the above problems, the existing partial endoscope adopts a high Dynamic Range imaging method similar to HDR (high Dynamic Range imaging), that is, two frames of images with different exposure times are fused to realize the control of an overexposed region, but because the conventional HDR is based on the fusion of a whole frame of continuously exposed images, the interval between the images is the period of a plurality of frames of images, so that a plurality of double images are generated in the moving process of a picture, and therefore, the exposure time of a sensor cannot be too long or too short, so that the overexposed region cannot be completely eliminated; in addition, the method can reduce the overall imaging rate, generate image delay and affect the operation safety.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a polarization imaging endoscope system has the image rate height, more is favorable to the advantage of operation or observation.

The above technical purpose of the present invention can be achieved by the following technical solutions: a polarized imaging endoscope system comprising: the device comprises a light source, an optical imaging lens, a polarization generating device, an image acquisition device and an image processing host; the polarization generating device is arranged between the light source and the optical imaging lens or between the optical imaging lens and the image acquisition device; and after receiving the images with different polarization directions acquired by the image acquisition device, the image processing host identifies the over-exposure area and then fuses the images.

According to a further aspect of the present invention, the image capturing device comprises N image sensors connected in an array; the polarization generating device is a polarization filter which corresponds to the N image sensors and has different polarization directions, and can filter the polarized light vertical to the polarization direction, so that N reflected images with different polarization directions can be obtained.

In the utility model, the polarization generating device is a polarization filter rotating at 360 degrees around the central axis at high speed; the polarization filter rotates for a circle, and the image acquisition device acquires N images for filtering and removing the total reflection of light in different polarization directions.

The utility model discloses a further setting, polarizing filter is in the rotation, is equipped with the confession image acquisition device acquires a N pause position of the image of the different polarization direction total reflection of light of N filtering.

In a further aspect of the present invention, the image capturing device comprises N image sensors; the polarization generating device comprises: the polarization filters correspond to the N image sensors and have different polarization directions; the beam splitting prism splits the image of the light beam to the N image sensors, and the light beam is filtered by the polarization filter on the way, so that N images which are filtered to remove the total reflection light in different polarization directions are obtained.

The utility model discloses a further setting, polarization generating device assemble in optical imaging lens, or assemble in image acquisition device, or set up alone.

To sum up, the utility model discloses following beneficial effect has:

1. the utility model provides a polarization imaging endoscope system sets up the polarization and produces the device between light source and optical imaging camera lens, or between optical imaging camera lens and the image acquisition device, because the light polarization principle can cause overexposure total reflection linear polarization to be blockked and can not pass through by polarization production device, and the diffuse reflection light energy of normal formation of image normally passes through, and the reasonable light that final polarization produced the device arrives image acquisition device, realizes electronic imaging.

2. The utility model discloses in, through the image of gathering the polarization direction of not passing simultaneously, differentiate these images, discern the imaging region of overexposure, fuse these images again, in same field of vision picture promptly, different regions adopt the image of different polarized light formation of image, and the best exposure image promptly fuses once more, and the best exposure effect image after finally will fusing is exported on the display, supplies the doctor or uses the user to watch.

Drawings

Fig. 1 is a schematic structural diagram of a conventional endoscopic camera system according to the present invention;

fig. 2 is a schematic structural diagram of the first, second and third embodiments of the present invention;

fig. 3 is a schematic diagram of a first embodiment of the present invention;

fig. 4 is another schematic structural diagram according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a polarization generating device according to a first embodiment of the present invention;

fig. 6 is a schematic diagram of a second embodiment of the present invention;

fig. 7 is another schematic structural diagram of a second embodiment of the present invention;

fig. 8 is another schematic structural diagram in the third embodiment of the present invention.

Description of reference numerals: 1. a light source; 2. an optical imaging lens; 3. a polarization generating device; 4. an image acquisition device; 31. a polarization filter; 32. a polarization image sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

The first embodiment is as follows: the present embodiment relates to a polarization imaging endoscope system, as shown in fig. 2, including: the device comprises a light source 1, an optical imaging lens 2, a polarization generating device 3, an image acquisition device 4 and an image processing host; the polarization generating device 3 is arranged between the light source 1 and the optical imaging lens 2 or between the optical imaging lens 2 and the image acquisition device 4; and after receiving the images with different polarization directions acquired by the image acquisition device 4, the image processing host identifies the over-exposure area and then fuses the images.

As shown in fig. 4 and 5, in the present embodiment, the image capturing device 4 includes N image sensors spliced in an array; the polarization generating device 3 is a polarization filter 31 corresponding to the N image sensors and having different polarization directions, and can filter the polarized light perpendicular to the polarization direction, and meanwhile, keep the light in other polarization directions entering the photosensitive area normally. The polarization imaging endoscope system can simultaneously acquire N images for filtering reflected light in different polarization directions. The image processing host machine analyzes the N images through an image algorithm, identifies an excessive exposure area, and when image fusion is carried out, the excessive exposure area adopts an image with total reflection light filtered out, and finally a frame of uniformly exposed image is synthesized and output.

In the present embodiment, the polarization generating device 3 is disposed between the optical imaging lens 2 and the image capturing device 4, and the polarization generating device 3 is mounted on the optical imaging lens 2, or mounted on the image capturing device 4, or separately disposed.

It should be noted that the image capturing device 4 in the present embodiment is integrated with the polarization generating device 3, as shown in fig. 3, and is specifically a polarization image sensor 32 with a polarization filter 31.

Example two: the present embodiment relates to a polarization imaging endoscope system, as shown in fig. 2, including: the device comprises a light source 1, an optical imaging lens 2, a polarization generating device 3, an image acquisition device 4 and an image processing host; the polarization generating device 3 is arranged between the light source 1 and the optical imaging lens 2 or between the optical imaging lens 2 and the image acquisition device 4; and after receiving the images with different polarization directions acquired by the image acquisition device 4, the image processing host identifies the over-exposure area and then fuses the images.

A difference between the present embodiment and the first embodiment is that, as shown in fig. 6 and fig. 7, in the present embodiment, the polarization generating device 3 is a polarization filter rotating at a high speed by 360 ° around a central axis, and the image capturing device 4 obtains N images with different polarization directions and total reflection removed. Since the polarizing filter rotates at high speed around the central axis, the time difference between the N images is negligible. Furthermore, the polarization filter is provided with N pause positions for the image acquisition device 4 to acquire N images for filtering total reflection in different polarization directions during rotation. The image processing host machine analyzes the N images through an image algorithm, identifies an excessive exposure area, and when image fusion is carried out, the excessive exposure area adopts an image with total reflection light filtered out, and finally a frame of uniformly exposed image is synthesized and output.

Example three: the present embodiment relates to a polarization imaging endoscope system, as shown in fig. 2, including: the device comprises a light source 1, an optical imaging lens 2, a polarization generating device 3, an image acquisition device 4 and an image processing host; the polarization generating device 3 is arranged between the light source 1 and the optical imaging lens 2 or between the optical imaging lens 2 and the image acquisition device 4; and after receiving the images with different polarization directions acquired by the image acquisition device 4, the image processing host identifies the over-exposure area and then fuses the images.

The present embodiment is different from the first embodiment in that, in the present embodiment, as shown in fig. 8, the image capturing device 4 includes N image sensors; the polarization generating device 3 comprises: the polarization filters correspond to the N image sensors and have different polarization directions; the beam splitting prism splits the image of the light beam to the N image sensors, and the light beam is filtered by the polarization filter on the way, so that N images which are filtered to remove the total reflection light in different polarization directions are obtained. The image processing host machine analyzes the N images through an image algorithm, identifies an excessive exposure area, and when image fusion is carried out, the excessive exposure area adopts an image with total reflection light filtered out, and finally a frame of uniformly exposed image is synthesized and output.

Based on the above-mentioned polarization imaging endoscope system, the present embodiment also relates to an imaging method of the polarization imaging endoscope system, the method comprising:

s1, irradiating the light emitted by the light source 1 to human tissues to generate different light reflections;

s2, filtering the total reflection light by the polarization generating device 3, and entering the optical imaging lens 2 for optical imaging;

s3, the image acquisition device 4 simultaneously acquires N images of the reflected light with different polarization directions;

s4, the image processing host machine obtains N images of the reflected light with different polarization directions after being filtered, identifies the excessive exposure area, and then fuses the images into a frame of uniformly exposed image for output; or the like, or, alternatively,

s1, irradiating the light emitted by the light source 1 to human tissues to generate different light reflections, and then entering the optical imaging lens 2 to perform optical imaging;

s2, filtering the total reflection light by the polarization generating device 3;

and S4, the image processing host machine acquires N images of the reflected light with different polarization directions after being filtered, identifies the excessive exposure area, and then fuses the images into a frame of uniformly exposed image for output.

The utility model provides a polarization imaging endoscope system sets up the polarization and produces the device between light source 1 and optical imaging camera lens 2, or between optical imaging camera lens 2 and image acquisition device 4, because the light polarization principle, can cause overexposure total reflection linear polarization to be blockked and can not pass through by polarization production device, and the diffuse reflection light energy of normal formation of image normally passes through, and the reasonable light that final polarization produced the device arrives image acquisition device 4, realizes electronic imaging. The images in the polarization-independent directions are collected at the same time, the images are distinguished, the imaging areas with over exposure are identified, the images are fused again, namely, the images imaged by different polarized lights in different areas, namely the optimal exposure images, are adopted in the same visual field picture, and finally the fused optimal exposure effect images are output to a display for a doctor or a user to watch.

The specific working process and principle are as follows: compared with the traditional image method for eliminating the over-exposure area, the scheme can effectively eliminate the excessive local brightness because the extinction ratio of the polaroid can often reach more than 1:10000, and the ratio of the longest exposure time to the shortest exposure time of the common sensor is often 1000: 60.

In addition, the conventional scheme needs 2 or more frames of images to be combined into 1 frame as the final output, which tends to reduce the speed of the whole imaging. In the above embodiment, the N images for synthesis are acquired simultaneously, so that the real-time performance of the images is higher, and the operation or observation is facilitated.

Claims

1. A polarized imaging endoscope system comprising: the device comprises a light source, an optical imaging lens, a polarization generating device, an image acquisition device and an image processing host;

the polarization generating device is arranged between the light source and the optical imaging lens or between the optical imaging lens and the image acquisition device;

and after receiving the images with different polarization directions acquired by the image acquisition device, the image processing host identifies the over-exposure area and then fuses the images.

2. A polarization imaging endoscope system according to claim 1 and wherein said image acquisition device comprises N image sensors tiled in an array;

the polarization generating device is a polarization filter which corresponds to the N image sensors and has different polarization directions, and can filter the polarized light vertical to the polarization direction, so that N reflected images with different polarization directions can be obtained.

3. A polarization imaging endoscope system according to claim 1 and wherein said polarization generating means is a polarizing filter rotating at high speed 360 ° around a central axis;

the polarization filter rotates for a circle, and the image acquisition device acquires N images for filtering and removing the total reflection of light in different polarization directions.

4. A polarization imaging endoscope system according to claim 3, characterized in that said polarization filter is provided with N pause positions for said image capturing device to obtain N images with different polarization directions and total reflection removed.

5. A polarized imaging endoscope system according to claim 1 and wherein said image acquisition device comprises N image sensors;

the polarization generating device comprises: the polarization filters correspond to the N image sensors and have different polarization directions;

the beam splitting prism splits the image of the light beam to the N image sensors, and the light beam is filtered by the polarization filter on the way, so that N images which are filtered to remove the total reflection light in different polarization directions are obtained.

6. A polarized imaging endoscope system according to claim 1 and wherein said polarization generating means is mounted to said optical imaging lens or to said image acquisition means or is provided separately.