CN207301366U - A kind of undersea detection divides aperture double CCD real-time polarization imaging devices - Google Patents
A kind of undersea detection divides aperture double CCD real-time polarization imaging devices Download PDFInfo
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- CN207301366U CN207301366U CN201720901535.5U CN201720901535U CN207301366U CN 207301366 U CN207301366 U CN 207301366U CN 201720901535 U CN201720901535 U CN 201720901535U CN 207301366 U CN207301366 U CN 207301366U
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Abstract
The utility model discloses a kind of undersea detection to divide aperture double CCD real-time polarization imaging devices, including detected target, preposition aperture imaging lens group, no polarization Amici prism, polarizer group, postposition altogether divide aperture imaging lens group, ccd detector, LED light source and transparent resin sealed compartment.The utility model divides aperture design device using CCD, completes point aperture with the polarized imaging system for dividing amplitude to be combined, realizes to being gathered while circular polarization, linear polarization original image and light intensity image.The utility model is using more optical information fusion polarization imaging method based on machine learning, for different water depth, the underwater environment of water quality, the optical parameter such as the color based on image, light intensity, degree of polarization and water body environment and detection range are modeled under the conditions of artificial light source, establish study mechanism, obtain the adaptability for higher contrast, the Underwater Target Detection image of clarity, improving underwater polarization imaging.
Description
Technical field
Involved by the utility model is a kind of underwater optics imaging device, the device of especially underwater polarization imaging.
Background technology
Polarization imaging technology is the new target acquisition technology to grow up in recent ten years, using polarization imaging technology not
The information such as the roughness, humidity, material physicochemical property of some natural target objects, and target acquisition under water can only be characterized
When can be in various degree reduction into the rear orientation light and target reflecting light of detector, most of rear orientation light is cut
And most of target reflecting light can reach detector, i.e. the incident ratio of target reflecting light is improved, on the detector shape
Into picture contrast be improved, so can largely improve the clarity of image using polarization imaging technology,
And then increase detection range and investigation depth.Therefore, imaging field has good development and should polarization imaging technology under water
Use prospect.
The research of underwater polarization imaging can be summarized as two major classes both at home and abroad at present, first, in the method base of Laser active illuminated imaging
Polarizer is introduced on plinth, to suppress water body rear orientation light；Second, remote sensing polarization imaging method is used for reference, with the side of rotatory polarization piece
Formula obtains multi-angle polarization image, and then solves the polarization characteristics such as degree of polarization, the angle of polarization, to improve underwater target detection ability.
Yet with spectrum, light intensity attenuation and light scattering of the aqueous medium in itself and caused by suspended particulate, cause underwater
Image chroma distortion, details obscure, and it is this influence and it is non-stable, with water quality, imaging the depth of water and sighting distance and move
State changes, therefore simple transplanting or improvement remote sensing polarization imaging method carry out Underwater Target Detection in practical applications into image quality
Raising degree is measured than relatively limited, while underwater floating field is not suitable for using the timesharing polarization imaging method of rotatory polarization chip
Close.Therefore, the utility model proposes one kind to divide polarization imaging device and method under the double CCD Real-time Waters in aperture, solves spectrum, light intensity
Target acquisition caused by decay and light scattering etc. obscures, contrast is low, and flating etc. caused by timesharing polarization imaging
Problem.
Utility model content
The utility model proposes one kind to divide polarization imaging device under the double CCD Real-time Waters in aperture, solve spectrum, light intensity attenuation with
And target acquisition caused by light scattering etc. obscures, contrast is low, and caused by timesharing polarization imaging the problems such as flating.
The technical solution adopted in the utility model is：A kind of undersea detection divides aperture double CCD real-time polarization imaging devices, bag
Include detected target, preposition aperture imaging lens group, no polarization Amici prism, polarizer group, postposition altogether divide aperture imaging saturating
Microscope group, ccd detector, LED light source and transparent resin sealed compartment；
The detected target is after LED light source lighting, its reflected light is successively by preposition aperture imaging lens group, nothing altogether
Polarization splitting prism, two groups of polarizer groups, two groups of postpositions divide aperture imaging lens group, are ultimately imaged in two ccd detectors
On；
Preposition aperture imaging lens group, no polarization Amici prism, polarizer group, the postposition altogether divide aperture imaging lens
Group and ccd detector are fixed in transparent resin sealed compartment；
In two groups of polarizer groups, one group is four-way polarizer group, and another group is then binary channels polarizer
Group；Four-way polarizer group places a linear polarizer respectively, its angle of polarization be respectively set to 0 °, 45 °, 90 °, 45 ° and
135°；Binary channels polarizer group places a circular polarizing disk all the way, and another way places a piece of nothing identical with polarizer thickness
Parallel flat is polarized, to reduce each path optics imaging difference；Two groups of postpositions be divided to aperture imaging lens group respectively with two groups of polarizations
Element group corresponds to, and each passage lens group optical axis and preposition aperture lens group optical axis deviation distance e=4.2mm altogether, ccd detector
Pixel dimension is 8 μm of 8 μ m, ensures that inconocenter offset is equal to the half of image height.
Preferably, the transparent resin sealed compartment Ethernet watertight connector interface, makes microprocessor and host computer profit
Communicated with cable, realize the transmission of image/video and receive the control of host computer.
Use the double CCD real-time polarizations imaging methods in undersea detection point aperture of above device for：Detected target is through unbiased
Shake after Amici prism, cause transmission image and reflected image mirror image each other, therefore, first by mirror image processing to reflected image into
Row pretreatment, makes it have identical direction.Image is then subjected to binary conversion treatment, is carried based on morphological images handling principle
Each image edge information detected on same ccd detector is taken, carries out image segmentation.Image registration is intended using feature based
Method for registering, needs coloured image being converted into gray level image first, using SURF algorithm, to whole original images for having split into
Row integral image converts, and characteristic point is detected using approximate Hessian matrixes, then with Haar small echos response construction feature vector
Distributed intelligence, is described characteristic point.With preferential kD tree methods matching characteristic point pair, reject and miss then in conjunction with RANSAC algorithms
Matching double points, least square method obtain the transformation matrix between image, are finally adopted again into row interpolation using bilinear interpolation method
Sample, obtains registering image result.
It is 0 ° to the angle of polarization after registration according to Stokes vector Ss={ I, Q, U, V } T, 45 °, 90 °, on 135 ° of directions
Target polarization gray level image solves degree of polarization figure A；Targeted color image zooming-out light intensity characteristic figure B；Using in rgb color space three
The extraction of gray scale linear relationship the color characteristic figure C, the circular polarization image D of gray processing of a passage.Using weighted strategy to above-mentioned figure
As being merged, each weight is learnt to obtain by underwater optics priori.Optics priori learning process is to be directed to different materials
Matter, the target of color extract light intensity, spectrum and degree of polarization figure under different quality and detection range, form training sample, with poly-
Class method classifies it, then for different classes of, solution optimal weights；Instructed with priori by by the inspection of altimetric image
Survey result, it may be determined that object detection task is to degree of polarization, light intensity, spectrum and circular polarization information in specific underwater optics environment
Dependency degree, i.e. weight, is represented with m, n, p, q respectively.The special scenes can be then obtained according to formula X=mA+nB+pC+qD
Blending image.
Beneficial effect：The utility model divides aperture design device using CCD, and it is inclined with dividing amplitude to be combined to complete point aperture
Shake imaging system, realize to being gathered while circular polarization, linear polarization original image and light intensity image.
The utility model using based on machine learning more optical information fusion polarization imaging method, for different water depth,
The underwater environment of water quality, the optical parameter such as the color based on image, light intensity, degree of polarization and water body ring under the conditions of artificial light source
Border and detection range are modeled, and establish study mechanism, are obtained with higher contrast, the Underwater Target Detection figure of clarity
Picture, improves the adaptability of underwater polarization imaging.
Brief description of the drawings
Fig. 1 divides the underwater polarization imaging device structure diagrams of the double CCD in aperture for the utility model.1st, detected target；2、
Preposition aperture imaging lens group altogether；3rd, no polarization Amici prism；4th, four-way polarizer group；5th, four-way postposition divide aperture into
As lens group；6th, ccd detector one；7th, binary channels polarizer group；8th, binary channels postposition divides aperture imaging lens group；9、CCD
Detector two；10th, LED light source one；11st, LED light source two；12nd, transparent resin sealed compartment.
Fig. 2 a divide aperture lens group forward direction schematic diagram (four-way group) for postposition；
Fig. 2 b divide aperture lens group forward direction schematic diagram (binary channels group) for postposition；
Fig. 3 is the Underwater Target Detection functional block diagram based on priori.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail：
The utility model proposes one kind to divide polarization imaging device under the double CCD Real-time Waters in aperture, and detected target 1 is through two
After the LED light source 1 and LED light source 2 11 of 10W, its reflected light is successively by preposition aperture imaging lens group 2, no polarization altogether
3, two groups of polarizer groups of Amici prism, two groups of postpositions divide aperture imaging lens group, are ultimately imaged on two groups of ccd detectors.
Preposition aperture imaging lens group 2, no polarization Amici prism 3, polarizer group, postposition altogether divide aperture imaging lens group
And ccd detector is fixed in transparent resin sealed compartment 12.
Transparent resin sealed compartment 12 designs Ethernet watertight connector interface, is used with Atmega8 microprocessors and host computer
Cable is communicated, and host computer procedure is write using VC, is realized the transmission of image/video and is received the control of host computer.
2 focal length of preposition aperture imaging lens group altogether is 100mm, and postposition divides aperture imaging lens group focal length to be 35mm, preceding
Two lens group spacing are 47mm afterwards, and in two groups of polarizer groups, one group is four-way polarizer group 4, and another group is then bilateral
Road polarizer group 7.Four-way polarizer group 4 places a linear polarizer respectively, its angle of polarization is respectively set to 0 °, 45 °,
90 °, 45 ° and 135 °.A circular polarizing disk is placed on 7 one tunnel of binary channels polarizer group, and another way is placed a piece of thick with polarizer
Identical no polarization parallel flat is spent, to reduce each path optics imaging difference.Four-way postposition divide aperture imaging lens group 5 with
Four-way polarizer group 4 corresponds to, and it is ccd detector 1 that four-way postposition, which is divided after aperture imaging lens group 5, binary channels postposition
Divide aperture imaging lens group 8 corresponding with binary channels polarizer group 7, binary channels postposition is divided after aperture imaging lens group 8 to be visited for CCD
Survey device 29, and each passage lens group optical axis and preposition 2 optical axis deviation distance e=4.2mm of aperture lens group altogether, ccd detector picture
Elemental size is 8 μm of 8 μ m.
Target causes transmission image and reflected image mirror image each other, therefore, passes through mirror image processing first after Amici prism
Reflected image is pre-processed, makes it have identical direction.Image is then subjected to binary conversion treatment, based on morphology figure
As handling principle extracts each image edge information detected on same ccd detector, progress image segmentation.Image registration is intended adopting
With the method for registering of feature based, need coloured image being converted into gray level image first, it is complete to what is split using SURF algorithm
Portion's original image carries out integral image conversion, detects characteristic point using approximate Hessian matrixes, is then responded with Haar small echos
Construction feature vector distribution information, is described characteristic point.With preferential kD tree methods matching characteristic point pair, then in conjunction with
RANSAC algorithms reject Mismatching point pair, and least square method obtains the transformation matrix between image, finally utilizes bilinear interpolation
Method obtains registering image result into row interpolation resampling.
It is 0 ° to the angle of polarization after registration according to Stokes vector Ss={ I, Q, U, V } T, 45 °, 90 °, on 135 ° of directions
Target polarization gray level image solves degree of polarization figure A；Targeted color image zooming-out light intensity characteristic figure B；Using in rgb color space three
The extraction of gray scale linear relationship the color characteristic figure C, the circular polarization image D of gray processing of a passage.Using weighted strategy to above-mentioned figure
As being merged, each weight is learnt to obtain by underwater optics priori.Optics priori learning process is to be directed to different materials
Matter, the target of color extract light intensity, spectrum and degree of polarization figure under different quality and detection range, form training sample, with poly-
Class method classifies it, then for different classes of, solution optimal weights；Instructed with priori by by the inspection of altimetric image
Survey result, it may be determined that object detection task is to degree of polarization, light intensity, spectrum and circular polarization information in specific underwater optics environment
Dependency degree, i.e. weight, is represented with m, n, p, q respectively.The special scenes can be then obtained according to formula X=mA+nB+pC+qD
Blending image.
Certainly, it is the representative instance of the utility model above, in addition, the utility model can also have other a variety of
Embodiment, all technical solutions formed using equivalent substitution or equivalent transformation, all falls within the requires of the utility model protection
Within the scope of.
Claims (2)
1. a kind of undersea detection divides aperture double CCD real-time polarization imaging devices, it is characterised in that：Including detected target, preposition
Aperture imaging lens group, no polarization Amici prism, polarizer group, postposition divide aperture imaging lens group, ccd detector, LED altogether
Light source and transparent resin sealed compartment；
The detected target is after LED light source lighting, its reflected light is successively by preposition aperture imaging lens group, no polarization altogether
Amici prism, two groups of polarizer groups, two groups of postpositions divide aperture imaging lens group, are ultimately imaged on two ccd detectors；
Preposition aperture imaging lens group, no polarization Amici prism, polarizer group, the postposition altogether divide aperture imaging lens group and
Ccd detector is fixed in transparent resin sealed compartment；
In two groups of polarizer groups, one group is four-way polarizer group, and another group is then binary channels polarizer group；Four
Passage polarizer group places a linear polarizer respectively, its angle of polarization is respectively set to 0 °, 45 °, 90 °, 45 ° and 135 °；It is double
Passage polarizer group places a circular polarizing disk all the way, and it is parallel that another way places a piece of no polarization identical with polarizer thickness
Tablet；Two groups of postpositions are divided to aperture imaging lens group corresponding with two groups of polarizer groups respectively, and each passage lens group optical axis is with before
Common aperture imaging lens group optical axis deviation distance e=4.2mm is put, ccd detector pixel dimension is 8 μm of 8 μ m, ensures inconocenter
Offset is equal to the half of image height.
2. a kind of undersea detection according to claim 1 divides aperture double CCD real-time polarization imaging devices, it is characterised in that：
The transparent resin sealed compartment Ethernet watertight connector interface, makes microprocessor be communicated with host computer using cable.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340546A (en) * | 2017-07-24 | 2017-11-10 | 南京信息工程大学 | A kind of undersea detection divides the double CCD real-time polarizations imaging devices in aperture and method |
| CN113504643A (en) * | 2021-06-23 | 2021-10-15 | 中国科学院长春光学精密机械与物理研究所 | Underwater low-light-level color imaging design method based on prism light splitting |
| CN116939376A (en) * | 2023-09-14 | 2023-10-24 | 长春理工大学 | Four-camera simultaneous polarization imaging system and method based on stokes vector |
-
2017
- 2017-07-24 CN CN201720901535.5U patent/CN207301366U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340546A (en) * | 2017-07-24 | 2017-11-10 | 南京信息工程大学 | A kind of undersea detection divides the double CCD real-time polarizations imaging devices in aperture and method |
| CN107340546B (en) * | 2017-07-24 | 2023-05-05 | 南京信息工程大学 | Underwater detection sub-aperture double CCD real-time polarization imaging device and method |
| CN113504643A (en) * | 2021-06-23 | 2021-10-15 | 中国科学院长春光学精密机械与物理研究所 | Underwater low-light-level color imaging design method based on prism light splitting |
| CN116939376A (en) * | 2023-09-14 | 2023-10-24 | 长春理工大学 | Four-camera simultaneous polarization imaging system and method based on stokes vector |
| CN116939376B (en) * | 2023-09-14 | 2023-12-22 | 长春理工大学 | Four-camera simultaneous polarization imaging system and method based on stokes vector |
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Granted publication date: 20180501 Termination date: 20200724 |