CN105890761B - A kind of channel of polarization calibrating method of polarization multi-spectrum imaging system - Google Patents
A kind of channel of polarization calibrating method of polarization multi-spectrum imaging system Download PDFInfo
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Abstract
The invention discloses a kind of channel of polarization calibrating method of polarization multi-spectrum imaging system, including step：The response pattern of each pixel is determined by incident radiation；Determine in microlens array response region of the channel of polarization on detector array under each lenticule；The response contrast extreme value of response region pixel and corresponding coordinate position are gathered, is fitted the phase angle of each polarization response pixel, and the channel of polarization belonging to pixel is divided according to phase angle；Asked for drawing centroid position of each channel of polarization after each lenticule according to the channel of polarization of each channel response；Fitting a straight line is carried out to centroid position and obtains a plurality of fitting a straight line；The intersection point for asking for all fitting a straight lines obtains image space of each channel of polarization under lenticule.The invention has the advantages that：Exact position of each passage in detector image planes can be obtained, can effectively eliminate the error that directly extraction pixel response extreme value is introduced as channel response, the channel information of extraction is more accurate.
Description
Technical field
The present invention relates to the calibration data processing technology field of optical imaging instrument, and in particular to a kind of polarization multi-spectrum imaging
The channel of polarization calibrating method of system.
Background technology
Polarization multi-spectrum Imaging remote sensing as a kind of new detection means, believe by the spectral information and polarization that can obtain target
These information are comprehensively utilized by breath, can effectively improve the performance of target acquisition and identification, particular for some by hidden
The target that means cover such as cover, pretend, suffering from being widely applied in military and civil area.And polarization multi-spectrum Imaging remote sensing
Technology is that spectral imaging technology is combined with polarization imaging technology, it is desirable to be able to while obtain the polarization information and spectrum letter of target
Breath.Conventional Polarization Detection mode can be divided into sequential type, interference-type and spatial domain type, because polarization imaging detection needs to obtain mesh
The response message being marked under different polarization states, therefore in order to obtain polarization information simultaneously, type polarization imaging detection in spatial domain is divided into again
Divide amplitude, point aperture and divide the forms such as focal plane.In order to be obtained while ensureing the polarization information and spectral information to target, light field
Polarization multi-spectrum imaging system can realize this purpose well.
Different from traditional imaging, optical field imaging can realize that two-dimensional detector image planes are come while record the four-dimensional information of light field,
That is two-dimensional position distribution and two-dimentional transmission direction.Light field polarization multi-spectrum imaging system is by the pupil face of optical field imaging system
The array that place's placement spectrum narrowband optical filter and the polarizer of different polarization states combine, by being divided and being adjusted to aperture
Obtained while making the spectral information for realizing different polarization states information and scenery, spectral information is finally obtained in detector image planes
Gathered while with polarization information.In order to obtain the polarization information of target, it is necessary to extract each polarization from detector image planes
The image information of state.But due in imaging process, due to structure mismachining tolerance, optical diffraction, microlens array coupling accuracy with
And the factor such as filter arrays machining accuracy influences so that the polarization response under each lenticule is not ideal position, it may occur that
Certain deviation, additionally due to spectral information has overlaying influence to polarization information, being accurately positioned for channel of polarization position can not be realized,
The Accurate Reconstruction of final polarisation-affecting image information.
The content of the invention
It is contemplated that at least solves one of above-mentioned technical problem.
Therefore, it is an object of the present invention to propose a kind of channel of polarization calibration side of polarization multi-spectrum imaging system
Method.
To achieve these goals, embodiment of the invention discloses that a kind of channel of polarization of polarization multi-spectrum imaging system
Calibrating method, comprise the following steps：S1：Radiated by known incident and determine that the response of each pixel in light field polarized imaging system is advised
Rule, the light field polarized imaging system include light source, primary mirror, microlens array and the detector array set gradually, the master
Polarization filtering array is provided with mirror, when the light that the light source is sent passes through the polarization filtering array on the primary mirror, every
Different polarizing filters is obtained at individual sub-aperture respectively, then by the phase of the detector array after the microlens array imaging
The pixel answered receives；S2：According to the response pattern of each pixel in the light field polarized imaging system, the microlens array is determined
In response region of the channel of polarization on the detector array under each lenticule；S3：Each channel of polarization is gathered to responding area
The response contrast extreme value of domain pixel and corresponding coordinate position, are fitted the phase angle of each polarization response pixel, and according to
Phase angle divides to the channel of polarization belonging to pixel；S4：According to each channel response detector image planes coordinate bit
Different polarization passage belonging to putting carries out barycenter and asks for drawing centroid position of each channel of polarization after each lenticule respectively；
S5：Fitting a straight line is carried out to the centroid position after each lenticule and obtains a plurality of fitting a straight line；And S6：Ask for all plans
The intersection point for closing straight line obtains image space of each channel of polarization under lenticule.
The channel of polarization calibrating method of polarization multi-spectrum imaging system according to embodiments of the present invention, by establish system into
As principle model, pixel features of response is analyzed, the preliminary interference between separation polarization and spectrum channel, is then responded according to pixel
The characteristics of curve, carries out channel of polarization separation, finally draws imaging pixel position of the channel of polarization after each lenticule, utilizes
Barycenter asks for algorithm, obtains the centroid position of different polarization passage after each lenticule, using least square fitting method to each logical
The coordinate position in road carries out fitting a straight line, so as to obtain exact position of each passage in detector image planes, can effectively eliminate
The pixel response extreme value error introduced as channel response is directly extracted, the channel information of extraction is more accurate.
In addition, the channel of polarization calibrating method of polarization multi-spectrum imaging system according to the above embodiment of the present invention, may be used also
With with technical characteristic additional as follows：
Further, step S1 further comprises：S101：Channel of polarization response table is determined according to known light radiation rule
Up to general type；And S102：According to the light field polarized imaging system determine channel of polarization respond embody form.
Further, it is described to determine in the microlens array that channel of polarization is in the detector array under each lenticule
On response region further comprise：Set contrast threshold；And when the contrast value of pixel is more than the contrast threshold
When, it is judged for channel of polarization, records area coordinate position and the response of each polarization response position.
Further, in step s3, its initial phase θ is fitted out to each polarization response pixel using below equation
(x,y；s,t)：
Wherein, I(x,y；s,t)Cover the response of pixel when (θ) is different angle θ on detector under certain lenticule, (x, y) is
Pixel position on detector, (s, t) are the two-dimensional coordinate in corresponding microlens array, and A is the response amplitude of fitting,For the initial phase of the pixel, C is the response constant fitted.
Further, step S5 further comprises：Fit every a line and each line by line and by column using least square method
The fitting a straight line of row image space.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the flow chart of the channel of polarization calibrating method of the polarization multi-spectrum imaging system of the present invention；
Fig. 2 is the principle schematic of the light field polarized imaging system of one embodiment of the invention；
Fig. 3 is the structural representation of the calibration light path of one embodiment of the invention；
Fig. 4 be one embodiment of the invention different polarization passage under each lenticule image space schematic diagram；
Fig. 5 be one embodiment of the invention every a line lenticule in the straight line of image formation matching position of a certain channel of polarization show
It is intended to.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relative
Importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, some particular implementations in embodiments of the invention are specifically disclosed, to represent to implement the implementation of the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
The channel of polarization calibration side of polarization multi-spectrum imaging system according to embodiments of the present invention is described below in conjunction with accompanying drawing
Method.
Fig. 1 is refer to, a kind of channel of polarization calibrating method of polarization multi-spectrum imaging system, is comprised the following steps：
S1：The response pattern for determining each pixel in light field polarized imaging system is radiated by known incident.Fig. 2 is refer to,
In embodiments of the invention, light field polarized imaging system includes light source, primary mirror, microlens array and the detector array set gradually
Arrange, polarization filtering array is provided with primary mirror, when the light that light source is sent passes through the polarization filtering array on primary mirror, in every height
Different polarizing filters is respectively obtained at aperture, then is connect after microlens array imaging by the corresponding pixel of detector array
Receive.
In one embodiment of the invention, step S1 further comprises the steps：
S101：Channel of polarization response expression general type is determined according to known light radiation rule.
S102：According to light field polarized imaging system determine channel of polarization respond embody form.
S2：According to the response pattern of each pixel in light field polarized imaging system, each lenticule in microlens array is determined
Response region of the lower channel of polarization on detector array.
In one embodiment of the invention, determine in microlens array that channel of polarization is in detector array under each lenticule
The process of response region on row further comprises：
Set contrast threshold；
When the contrast value of pixel is more than contrast threshold, it is judged for channel of polarization, is recorded each polarization and is rung
Answer area coordinate position and the response of position.
Specifically, light is after different optical filters, meeting specific region response after each lenticule, according to pixel
Response curve, it can be determined that the species that pixel is modulated, i.e., whether by polarization filtering piece modulate, also or by spectral filtering
Piece is modulated.In embodiments of the present invention, it is used as criterion by setting contrast, each pixel is differentiated, it is whole so as to propose
Polarization response position in width detector image planes.It refer to Fig. 3, calibration optical routing integrating sphere, linear polarization in example of the present invention
Piece, light field polarization multi-spectrum imager composition.
Integrating sphere outlet light source be uniform non-polarized, the linear polarizer and light field polarization multi-spectrum imager of process
Afterwards, eventually responded in detector image planes.Initial angle turned position is set, is then turned using step delta θ (initial value is 1 °)
The linear polarizer one week, obtains (360 °/Δ θ) group pixel responses of N, and data are denoted as DNm(x,y；s,t)k(k=1,2 ...
360), wherein (x, y) be detector on pixel position, (s, t) be corresponding microlens array in two-dimensional coordinate, m
(m=1,2,3) the channel of polarization mark for being then.DN is responded to the pixel on each pixel positionm(x,y；S, t) divided
Analysis, calculate contrast C (x, the y of each pixel；s,t).Then, the linear polarizer in Fig. 3 is removed, collection is not equally had
Light field image I under bulb separation brightness.
The response expression formula of polarization pixel in step S1 and the non-response general type of pixel partially, using in the step
The contrast criterion mentioned, setting contrast threshold τ (τ=0.25 is selected in the present embodiment), when the contrast value of pixel is more than
During threshold value, it is judged for channel of polarization, records area coordinate position and the response of each polarization response position.
S3：Response contrast extreme value and corresponding coordinate position of each channel of polarization to response region pixel are gathered, is intended
The phase angle of each polarization response pixel is closed, and the channel of polarization belonging to pixel is divided according to phase angle.
In one embodiment of the invention, its first phase is fitted out to each polarization response pixel using below equation
Position θ (x, y；s,t)：
Wherein, I(x,y；s,t)Cover the response of pixel when (θ) is different angle θ on detector under certain lenticule, (x, y) is
Pixel position on detector, (s, t) are the two-dimensional coordinate in corresponding microlens array, and A is the response amplitude of fitting,For the initial phase of the pixel, C is the response constant fitted.
According to the first phase place value size fitted, passage differentiation is carried out to the response pixel under channel of polarization, so as to obtain
Polarization response passage corresponding to polarization response pixel, that is, determine the m in step S2.
S4：Different polarization passage according to belonging to coordinate position of each channel response in detector image planes carries out barycenter respectively
Ask for drawing centroid position of each channel of polarization after each lenticule.
Specifically, according to step S1-S3, the response pixel position of the different polarization passage under each lenticule can be obtained
Put, extract away and (go) except the energy response of the corresponding pixel position after linear polarizer in acquired light field image, and profit
Algorithm is asked for barycenter, obtains different polarization passage image space under each lenticule.
As shown in figure 4, in the example of the present invention, Fig. 4 left images ' o ' represent channel of polarization 1 each micro-
Imaging centroid position under mirror, ' * ' represent imaging centroid position of the channel of polarization 2 under each lenticule, and it is logical that '+' represents polarization
Imaging centroid position of the road 3 under each lenticule.
S5：Fitting a straight line is carried out to the centroid position after each lenticule and obtains a plurality of fitting a straight line.
In one embodiment of the invention, fitted line by line and by column using least square method every a line and it is each row into
The fitting a straight line of image position.
Specifically, in order to eliminate spectral information interference, and the influence of instrument system adjustment equal error, according to required by the 4th step
The centroid position taken, using least squares line fitting method, every a line and each row image space are fitted line by line and by column
Fitting a straight line.
S6：The intersection point for asking for all fitting a straight lines obtains image space of each channel of polarization under lenticule.
Specifically, Fig. 4 image right (with reference to the image of figure 4) is refer to, the channel of polarization 1 arbitrarily chosen is in the 200th row
Imaging centroid position (line segment that * is drawn) under lenticule, it is changed into Fig. 4 right images (figure after least squares line fitting
5) straight line in.Assuming that size M × N of microlens array, then corresponding to view picture microlens array for, you can obtained with fitting
The horizontal fitting a straight line of M bars, and the vertical fitting a straight line of N bars, the intersection point of above-mentioned straight line is asked for, obtain M × N number of and be distributed in detector
Imaging point position in image planes, position is ultimately imaged under microlens array as the channel of polarization.Using same method,
Other m-1 channel of polarization are carried out with similar processing procedure, finally realizes whole channel of polarization under each lenticule
Imaging position information.
In addition, other compositions of the channel of polarization calibrating method of the polarization multi-spectrum imaging system of the embodiment of the present invention and
Effect is all known for a person skilled in the art, in order to reduce redundancy, is not repeated.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is by claim and its equivalent limits.
Claims (5)
1. a kind of channel of polarization calibrating method of polarization multi-spectrum imaging system, it is characterised in that comprise the following steps：
S1：The response pattern for determining each pixel in light field polarized imaging system, the light field polarization imaging are radiated by known incident
System includes light source, primary mirror, microlens array and the detector array set gradually, and polarization filtering battle array is provided with the primary mirror
Row, when the light that the light source is sent passes through the polarization filtering array on the primary mirror, respectively obtained not at each sub-aperture
Same polarizing filter, then received after the microlens array imaging by the corresponding pixel of the detector array；
S2：According to the response pattern of each pixel in the light field polarized imaging system, determine each micro- in the microlens array
Response region of the channel of polarization on the detector array under lens；
S3：Response contrast extreme value and corresponding coordinate position of each channel of polarization to response region pixel are gathered, fitting is each
The phase angle of individual polarization response pixel, and the channel of polarization belonging to pixel is divided according to phase angle；
S4：Different polarization passage according to belonging to coordinate position of each channel response in detector image planes carries out barycenter and asked for respectively
Draw centroid position of each channel of polarization after each lenticule；
S5：Fitting a straight line is carried out to the centroid position after each lenticule and obtains a plurality of fitting a straight line；And
S6：The intersection point for asking for all fitting a straight lines obtains image space of each channel of polarization under lenticule.
2. the channel of polarization calibrating method of polarization multi-spectrum imaging system according to claim 1, it is characterised in that step
S1 further comprises：
S101：Channel of polarization response expression general type is determined according to known light radiation rule；And
S102：According to the light field polarized imaging system determine channel of polarization respond embody form.
3. the channel of polarization calibrating method of polarization multi-spectrum imaging system according to claim 2, it is characterised in that described
Determine that response region of the channel of polarization on the detector array further wraps under each lenticule in the microlens array
Include：
Set contrast threshold；And
When the contrast value of pixel is more than the contrast threshold, it is judged for channel of polarization, is recorded each polarization and is rung
Answer area coordinate position and the response of position.
4. the channel of polarization calibrating method of polarization multi-spectrum imaging system according to claim 1, it is characterised in that in step
In rapid S3, its initial phase θ (x, y are fitted out to each polarization response pixel using below equation；s,t)：
Wherein, I(x,y；s,t)Cover the response of pixel when (θ) is different angle θ on detector under certain lenticule, (x, y) is detection
Pixel position on device, (s, t) are the two-dimensional coordinate in corresponding microlens array, and A is the response amplitude of fitting,For
The initial phase of the pixel, C are the response constant fitted.
5. the channel of polarization calibrating method of polarization multi-spectrum imaging system according to claim 1, it is characterised in that step
S5 further comprises：Fit the fitting a straight line of every a line and each row image space line by line and by column using least square method.
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| CN107677370B (en) * | 2017-09-29 | 2020-01-14 | 中国科学院长春光学精密机械与物理研究所 | Polarized radiation calibration system and method of channel type polarized spectrum imager |
| CN111585645B (en) * | 2019-02-18 | 2023-03-31 | 富士通株式会社 | Polarization state change monitoring device and method caused by optical link and optical receiver |
| CN110081978A (en) * | 2019-04-29 | 2019-08-02 | 南京理工大学 | A kind of multispectral polarization imaging device of transient state and its imaging method |
| CN112634287A (en) * | 2020-12-25 | 2021-04-09 | 电子科技大学 | Heart magnetic resonance image segmentation method based on interlayer offset correction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005017233A1 (en) * | 2005-04-14 | 2006-10-19 | Krackhardt, Ulrich, Dr. | Sensor, has illumination unit producing deep-sharp, laterally structured light sample, where three-dimensional structure of sample remains unchanged over wide range of its dispersion in area |
| CN101464256A (en) * | 2009-01-14 | 2009-06-24 | 北京航空航天大学 | Polarization precision scaling system for polarization optical spectrometer |
| CN105043547A (en) * | 2015-07-23 | 2015-11-11 | 北京环境特性研究所 | AOTF imaging spectrometer spectrum calibration method |
| CN105300523A (en) * | 2015-10-09 | 2016-02-03 | 北京航空航天大学 | Polarization calibration method of light field polarization imaging system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005017233A1 (en) * | 2005-04-14 | 2006-10-19 | Krackhardt, Ulrich, Dr. | Sensor, has illumination unit producing deep-sharp, laterally structured light sample, where three-dimensional structure of sample remains unchanged over wide range of its dispersion in area |
| CN101464256A (en) * | 2009-01-14 | 2009-06-24 | 北京航空航天大学 | Polarization precision scaling system for polarization optical spectrometer |
| CN105043547A (en) * | 2015-07-23 | 2015-11-11 | 北京环境特性研究所 | AOTF imaging spectrometer spectrum calibration method |
| CN105300523A (en) * | 2015-10-09 | 2016-02-03 | 北京航空航天大学 | Polarization calibration method of light field polarization imaging system |
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