CN108873363A - 3 d light fields imaging system and method based on structure signal - Google Patents
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Abstract
The invention discloses a kind of 3 d light fields imaging system and method based on structure signal, for rebuilding the threedimensional model of testee, solve the problems, such as that reconstructing three-dimensional model precision is low in the prior art, including：Projection mark module, for testee surface projection and phase mark；Light field logging modle, for recording light field image under several visual angles；Light field conversion module, for the light field image of testee to be converted to four-dimensional light field data；Data computation module, for the data of the medium phase value of four-dimensional light field to be fitted to straight line；And three-dimensional reconstruction module, for rebuilding the three dimensional point cloud information of testee according to the slope of straight line and the corresponding relationship of light field depth, to rebuild threedimensional model；By carrying out projection and phase mark to testee, and four-dimensional light field data is established using collected light field image, the three dimensional point cloud of testee can be accurately obtained finally by calculating, to improve reconstructing three-dimensional model precision.
Description
Technical field
The present invention relates to 3 dimension imaging technology fields more particularly to a kind of 3 d light fields based on structure signal, and system is imaged
System and method.
Background technique
With the development of science and technology, the three-dimensional rebuilding method based on optical field imaging theory has been widely used for military section
The fields such as skill, life & amusement, so the three-dimensional rebuilding method of light field theory becomes the hot topic studied now, existing base
In the three-dimensional rebuilding method of light field theory mainly include Fourier's chromatography and polar plane analytic approach.
Wherein, Fourier chromatography is mainly analyzed using to four-dimensional light field data, according to the picture point of different depth
Focal position it is different, construct filter function appropriate, obtain largely with change in depth image focusing area change layer
Picture is analysed, body surface three-dimensional model is then gone out according to the reconstruction of relations of depth and focus point, but the reconstruction of this method is smart
The three dimensional point cloud for spending low, to rebuild body surface is sufficiently complete.
Secondly, polar plane analytic approach is the property according to polar figure, the corresponding pixel of object point is linearly divided on polar figure
The slope of cloth, straight line corresponds to the depth of object point, so optimizing processing by the polar plane image to light field, constrains polar plane
Straight slope in data, seeks the depth value of object point, and this method improves optical field imaging relative to Fourier chromatography
Reconstruction precision, but depending on due to the solution of the slope of straight line being the similitude based on gray value, on same straight line
Characteristic point be difficult to determine, the three dimensional point cloud of the body surface caused is sufficiently complete so that square imaging
Reconstruction precision is still to be improved.
Based on the above analysis, the three-dimensional point cloud for the testee that the existing three-dimensional rebuilding method based on light field theory obtains
Data are sufficiently complete, so that the reconstructing three-dimensional model precision to testee surface is low.
Summary of the invention
The main purpose of the present invention is to provide a kind of 3 d light fields imaging system and method based on structure signal, purports
Solving the low technical problem of the reconstructing three-dimensional model precision to testee surface in the prior art.
To achieve the above object, one aspect of the present invention provides a kind of 3 d light fields imaging system based on structure signal,
Including：Projection mark module, for carrying out projection and phase mark, in the present embodiment, projection mark to testee surface
Module is specially projector, carries out projection and phase mark to testee surface by projector, in other embodiments, throws
The equipment that shadow mark module can have projection and phase mark also for projection lamp etc.；Light field logging modle, at least two
Comprehensive and repetition record paper has the light field image of the testee of phase mark under visual angle；Light field conversion module is used for basis
The light field image of testee is converted to four-dimensional light field data by phase mark；Data computation module is used for the four-dimensional light
The data of the medium phase value in field are fitted to straight line；And three-dimensional reconstruction module, for deep according to the slope and light field of the straight line
The corresponding relationship of degree solves the three dimensional point cloud information of testee, with tested according to the three dimensional point cloud information reconstruction
The threedimensional model of object.
By using above-mentioned technical proposal, projection mark module can carry out projection and phase mark to testee, from
And make the label source of light field image accurate；Light field logging modle can record the light with phase mark under several visual angles
Field picture, to record the light field image and phase mark on testee surface, in all directions so as to make light field image exist
After light field conversion module, the 3 d light fields data of light field image are converted into four-dimensional light field data, obtain comprehensive quilt
The light field image data of object are surveyed, four-dimensional light field data is fitted after the conversion of data computation module as straight line, Three-dimensional Gravity
Modeling block can calculate the three dimensional point cloud information of testee according to the slope of straight line and the corresponding relationship of light field depth,
Since three dimensional point cloud information is both from specific four-dimensional light field data, so that three dimensional point cloud information is compared with subject to
Really, to improve reconstructing three-dimensional model precision.
Further, the light field conversion module includes：Phase-demodulation unit, for demodulating the phase on testee surface
Label；Phase recording unit, for recording the phase mark demodulated；And phase sets unit, it is used for measured object
The 3 d light fields data of testee are converted to four-dimensional light field data by the phase mark set of the different perspectives of body.
Further, the light field conversion module further includes：Phase compensation unit, the phase compensation unit is near
The phase of testee under few two visual angles mutually compensates, to obtain the comprehensive phase mark in testee surface.
Further, the data computation module includes：Data searching unit, for the phases such as searching in the four-dimensional light field
The four-dimensional light field data of place value, phase value of the same phase mark point under different perspectives are equal；Date Conversion Unit, being used for will
The equal four-dimensional light field data of phase value is fitted to straight line in the four-dimension light field, and calculates the slope of the straight line.
Further, the data computation module further includes：Searching unit is repeated, the searching unit that repeats is used for institute
The four-dimensional light field data for stating equiphase value in four-dimensional light field is searched at least twice.
Further, the light field logging modle includes：Coaxial recording unit, for by it is coaxial and same straight line not
With the light field image of the visual angle record testee with phase mark on position.
Further, the coaxial recording unit is specifically used for the equidistant record different location view on the same straight line
The light field image of the testee at angle.
Further, the projection mark module is specifically used for the striped formed by active projecting structural optical coding pair
Testee surface carries out projection and phase mark.
Another aspect of the present invention provides a kind of 3 d light fields imaging method based on structure signal, including：To tested
Body surface carries out projection and phase mark；Comprehensive and repetition record paper has the tested of phase mark under at least two visual angles
The light field image of object；The light field image of testee is converted into four-dimensional light field data according to phase mark；By four-dimensional light field
The data of equiphase value in data are fitted to straight line；It is rebuild according to the slope of the straight line and the corresponding relationship for hanging light field depth
The three dimensional point cloud information of testee.
Further, described the light field image of testee is converted to by four-dimensional light field data according to phase mark to include：
Demodulate the phase mark on testee surface；Record the phase mark demodulated；By the phase mark of the different perspectives of testee
Note set, and the 3 d light fields data of testee are converted into four-dimensional light field data.
The present invention provides a kind of 3 d light fields imaging system based on structure signal, and beneficial effect is：If by
Record testee has the light field image of phase mark under dry visual angle, can record the phase mark of testee in all directions
And light field image, to ensure that the integrality of the phase mark of testee；Phase mark is turned by light field conversion module
It is changed to four-dimensional light field data, can guarantee the integrality of light field data, and more due to the phase mark source of testee
It is clear, therefore the four-dimensional light field data after phase mark is converted is more accurate；When data computation module is by the four-dimension of equiphase value
After light field data is fitted to straight line, three-dimensional reconstruction module rebuilds measured object according to the slope of straight line and the corresponding relationship of light field depth
The three dimensional point cloud information of body, since the slope source of straight line is the straight line that equiphase four-dimensional light field data is fitted to, and
The data of four-dimensional light field data are more accurate, so that three dimensional point cloud information is more accurate, so that according to three-dimensional
The threedimensional model of the testee of point cloud data information reconstruction is more accurate, to improve reconstructing three-dimensional model precision.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic block diagram of 3 d light fields imaging system of the embodiment of the present invention based on structure signal；
Fig. 2 is the structure of the light field conversion module of 3 d light fields imaging system of the embodiment of the present invention based on structure signal
Schematic block diagram；
Fig. 3 is the structure of the data computation module of 3 d light fields imaging system of the embodiment of the present invention based on structure signal
Schematic block diagram.
In the accompanying drawings, each appended drawing reference indicates：1, projection mark module；2, light field logging modle；3, light field conversion module；
4, data computation module；5, three-dimensional reconstruction module；31, phase-demodulation unit；32, phase recording unit；33, phase sets list
Member；34, phase compensation unit；41, data searching unit；42, Date Conversion Unit；43, searching unit is repeated.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, be a kind of 3 d light fields imaging system based on structure signal, including：Projection mark module 1,
Light field logging modle 2, light field conversion module 3, data computation module 4 and three-dimensional reconstruction module 5；Projection mark module 1 for pair
Testee surface carries out projection and phase mark, encodes specifically for the striped formed by active projecting structural optical to quilt
It surveys body surface and carries out projected phase label, so that the label source of light field image is accurate；Light field logging modle 2 is used for
Comprehensive and repetition record paper has the light field image of the testee of phase mark under at least two visual angles, to record measured object
Three-dimensional data；Light field conversion module 3 is used to that the light field image of testee to be converted to four-dimensional light field number according to phase mark
According to obtaining the light field image data of comprehensive testee；Data computation module 4 is used for the medium phase value of four-dimensional light field
Data are fitted to straight line；Three-dimensional reconstruction module 5 is used to rebuild measured object according to the slope of straight line and the corresponding relationship of light field depth
The three dimensional point cloud information of body, so that the threedimensional model of testee is calculated according to three dimensional point cloud information, due to three-dimensional
Point cloud data information is both from specific four-dimensional light field data, so that three dimensional point cloud information is more accurate, thus
Improve reconstructing three-dimensional model precision.
Referring to Fig. 2, wherein, light field conversion module 3 includes：Phase-demodulation unit 31, phase recording unit 32 and phase
Aggregation units 33；Phase-demodulation unit 31 is used to demodulate the phase mark on testee surface；Phase recording unit 32 is for remembering
Record the phase mark demodulated；Phase sets unit 33 is used for the phase mark set of the different perspectives of testee, thus
The 3 d light fields data of testee are converted into four-dimensional light field data, and when testee four-dimension light field data is recorded
Afterwards, so that each position light field data on testee surface is recorded, to improve the light field data on testee surface
Integrality, reduce cause because of the imperfection of light field data the threedimensional model precision finally rebuild reduction, to improve
The reconstruction precision of threedimensional model.
In the present embodiment, light field conversion module 3 further includes phase compensation unit 34, and phase compensation unit 34 is near
The phase mark of testee under few two visual angles mutually compensates, to obtain the comprehensive phase mark on testee surface
Note, to improve the integrality of the phase mark on testee surface, reducing causes because of the imperfection of phase mark
The threedimensional model precision finally rebuild reduces, to improve the reconstruction precision of threedimensional model.
Referring to Fig. 3, data computation module 4 includes：Data searching unit 41 and Date Conversion Unit 42；Data search list
Member 41 is for searching the four-dimensional light field data of equiphase value in four-dimensional light field, and in the present embodiment, same phase mark point is not
It is equal with the phase value under visual angle；Date Conversion Unit 42 is used to the equal four-dimensional light field data of phase value being fitted to straight line,
And the slope for the straight line being fitted to according to four-dimensional light field data is calculated, so that four-dimensional light field data is converted to two straight line numbers
According to being more clear the testing result of testee intuitively, be easy to subsequent research, and pass through above-mentioned slope and pair of depth
Reconstruction of relations is answered to go out the three dimensional point cloud information of testee, since the integrality of the phase mark of testee is higher, therefore
The slope for the straight line being fitted to according to four-dimensional light field data is more accurate, so that three dimensional point cloud is more accurate, thus
Improve the reconstruction precision of threedimensional model.
In the present embodiment, data computation module 4 further includes repeating searching unit 43, repeats searching unit 43 for equity
The four-dimensional light field data of phase value is searched at least twice, to reduce the probability that four-dimensional light field data is missed, is improved
The precision of the slope for the straight line being fitted to according to four-dimensional light field data mentions to improve the accuracy of three dimensional point cloud
The high reconstruction precision of threedimensional model.
Light field logging modle 2 includes coaxial recording unit, and coaxial recording unit is used for by coaxially and collinear
The light field image of testee of the visual angle record with phase mark on different location, to record testee in all directions
Light field image, in the present embodiment, coaxial recording unit is specially video camera, by camera record with phase mark
The light field image of testee.
Coaxial recording unit is specifically used for the light of the testee at equidistant record different location visual angle on the same line
Field picture is convenient for subsequent calculating, thus after reducing so that the light field image for the testee recorded is regular
Continuous difficulty in computation reduces the time cost of subsequent calculating；It in the present embodiment, will be same by the average moving stage of electric water
The video camera that axis recording unit provides is mobile every time to fix position, to realize the equidistant record testee of coaxial recording unit
Light field image, in other embodiments, coaxial recording unit provide at least three video cameras, the distance between every video camera
It is equal, to realize the light field image of the equidistant record testee of coaxial recording unit.
3 d light fields imaging system provided by the invention based on structure signal, working principle or process are as follows：It is logical
It crosses and records the light field image that testee has phase mark under several visual angles, the phase of testee can be recorded in all directions
Position label and light field image, to ensure that the integrality of the phase mark of testee；By light field conversion module 3 by phase
Label is converted to four-dimensional light field data, can guarantee the integrality of light field data, and since the phase mark of testee comes
Source is more clear, therefore the four-dimensional light field data after phase mark is converted is more accurate；When data computation module 4 is by equiphase value
Four-dimensional light field data be fitted to straight line after, three-dimensional reconstruction module 5 is according to the slope of straight line and the corresponding relationship weight of light field depth
The three dimensional point cloud information for building testee, since the equiphase four-dimensional light field data in the slope source of straight line is fitted to
Straight line, and the data of four-dimensional light field data are more accurate, so that three dimensional point cloud information is more accurate, so that root
Threedimensional model according to the testee of three dimensional point cloud information calculating is more accurate, to improve reconstructing three-dimensional model essence
Degree.
The present invention also provides a kind of 3 d light fields imaging methods based on structure signal, including：To measured object body surface
Face carries out projection and phase mark；Comprehensive and repetition record paper has the testee of phase mark under at least two visual angles
Light field image；The light field image of testee is converted into four-dimensional light field data according to phase mark；It will be in four-dimensional light field data
The data of equiphase value be fitted to straight line；Testee is rebuild according to the slope of straight line and the corresponding relationship for hanging light field depth
Three dimensional point cloud information.
The light field image of testee, which is converted to four-dimensional light field data, according to phase mark includes：Demodulate measured object body surface
The phase mark in face；Record the phase mark demodulated；By the phase mark set of the different perspectives of testee, and will be tested
The 3 d light fields data of object are converted to four-dimensional light field data.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the module, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple module or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or logical of device or module
Letter connection can be electrical property, mechanical or other forms.
The module as illustrated by the separation member may or may not be physically separated, aobvious as module
The component shown may or may not be physical module, it can and it is in one place, or may be distributed over multiple
On network module.Some or all of the modules therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional module in embodiments of the present invention can integrate in a processing module, it is also possible to each
A module physically exists alone, and can also be integrated in a module with two or more modules.Above-mentioned integrated module was both
It can take the form of hardware realization, can also be realized in the form of software function module.
If the integrated module is realized in the form of software function module and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because
According to the present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know
It knows, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not all be this hair
Necessary to bright.
The above are to provided by the present invention a kind of based on the 3 d light fields imaging system of structure signal and retouching for method
It states, for those skilled in the art, thought according to an embodiment of the present invention can in specific embodiments and applications
There is change place, to sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of 3 d light fields imaging system based on structure signal, which is characterized in that including：
Projection mark module, for carrying out projection and phase mark to testee surface；
Light field logging modle has the testee of phase mark for comprehensive under at least two visual angles and repetition record paper
Light field image；
Light field conversion module, for the light field image of testee to be converted to four-dimensional light field data according to phase mark；
Data computation module, for the data of the medium phase value of four-dimensional light field to be fitted to straight line；And
Three-dimensional reconstruction module, for solving the three-dimensional of testee according to the slope of the straight line and the corresponding relationship of light field depth
Point cloud data information, according to the threedimensional model of the three dimensional point cloud information reconstruction testee.
2. the 3 d light fields imaging system according to claim 1 based on structure signal, which is characterized in that the light field
Conversion module includes：
Phase-demodulation unit, for demodulating the phase mark on testee surface；
Phase recording unit, for recording the phase mark demodulated；And
Phase sets unit, for by the phase mark set of the different perspectives of testee, by the three-dimensional light of testee
Field data is converted to four-dimensional light field data.
3. the 3 d light fields imaging system according to claim 2 based on structure signal, which is characterized in that the light field
Conversion module further includes：
Phase compensation unit, for mutually compensating the phase of the testee under at least two visual angles, to obtain testee
The comprehensive phase mark in surface.
4. the 3 d light fields imaging system according to claim 1 based on structure signal, which is characterized in that the data
Computing module includes：
Data searching unit, for searching the four-dimensional light field data of equiphase value in the four-dimensional light field, same phase mark point
Phase value under different perspectives is equal；
Date Conversion Unit for the equal four-dimensional light field data of phase value in the four-dimensional light field to be fitted to straight line, and is counted
Calculate the slope of the straight line.
5. the 3 d light fields imaging system according to claim 4 based on structure signal, which is characterized in that the data
Computing module further includes：
Searching unit is repeated, is searched at least twice for the four-dimensional light field data to equiphase value in the four-dimensional light field.
6. the 3 d light fields imaging system according to claim 1 based on structure signal, which is characterized in that the light field
Logging modle includes：
Coaxial recording unit, for having phase mark by the way that coaxial and on same straight line different location visual angle record is described
Testee light field image.
7. the 3 d light fields imaging system according to claim 6 based on structure signal, which is characterized in that described coaxial
Recording unit is specifically used for the light field image of the testee at equidistant record different location visual angle on the same straight line.
8. the 3 d light fields imaging system according to claim 1 based on structure signal, which is characterized in that the projection
Mark module is specifically used for the striped formed by active projecting structural optical coding and carries out projection and phase to testee surface
Position label.
9. a kind of 3 d light fields imaging method based on structure signal, which is characterized in that including：
Projection and phase mark are carried out to testee surface；
Comprehensive and repetition record paper has the light field image of the testee of phase mark under at least two visual angles；
The light field image of testee is converted into four-dimensional light field data according to phase mark；
The data of equiphase value in four-dimensional light field data are fitted to straight line；
The three dimensional point cloud information of testee is rebuild according to the slope of the straight line and the corresponding relationship of light field depth.
10. the 3 d light fields imaging method according to claim 9 based on structure signal, which is characterized in that described
The light field image of testee, which is converted to four-dimensional light field data, according to phase mark includes：
Demodulate the phase mark on testee surface；
Record the phase mark demodulated；
Four-dimensional light is converted to by the phase mark set of the different perspectives of testee, and by the 3 d light fields data of testee
Field data.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233162A (en) * | 2020-10-06 | 2021-01-15 | 武汉烽火凯卓科技有限公司 | Measuring method and device for plane image analysis based on structural illumination characteristics |
| CN112945090A (en) * | 2020-12-11 | 2021-06-11 | 深圳市菲森科技有限公司 | Calibration device and calibration method of three-dimensional measurement system |
| CN113724371A (en) * | 2021-08-13 | 2021-11-30 | 深圳技术大学 | Three-dimensional imaging method and system of coaxial illumination light field, electronic device and storage medium |
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