CN111526261B - Method and system for recovering hidden information of image information based on white light interference - Google Patents
Method and system for recovering hidden information of image information based on white light interference Download PDFInfo
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Abstract
The invention relates to a method and a system for recovering hidden information of image information based on white light interference, which comprises the following steps: acquiring an interferogram set; the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting; determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system; scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key; compressing each interferogram in the random interferogram set to obtain a compressed interferogram set and a compressed matrix key; and integrating the compressed interference pattern set, and hiding the integrated data in the host image to obtain an information hidden image. The method of the invention can reduce coherent noise, improve the quality and speed of information hiding information recovery and improve the safety of the system.
Description
Technical Field
The invention relates to the technical field of information hiding, in particular to a method and a system for recovering image information hidden information based on white light interference.
Background
Today, with the rapid development of network technology, information is not transferred between telephones and letters in the traditional sense, and digitized information such as pictures, voice, video and the like is continuously transmitted and exchanged in the network. At present, as long as an individual interacts with the society in a network manner, the information of the individual has the possibility of being stolen, illegally copied, spread and tampered. The importance of information security is placed prominently in front of people.
Information security mainly comprises two directions: cryptography and information hiding.
Cryptography is the core of information security. The method is to finally change the information to be transmitted into disordered irregular codes through various means. An attacker generally cannot acquire original information through only a ciphertext, and a user can acquire implicit information through a known secret key. Optical information processing is an emerging front-edge subject in the last four decades, and is made to stand out in the field of information security by combining the advantages of high processing speed, parallelism, large capacity and the like of light with the unique properties of wavelength, polarization, frequency, spectral band and the like.
Information hiding is yet another important direction in information security. By hiding the information to be transmitted in the carrier host, the encryptor can not know whether the information exists or not. Hiding of information is more fraudulent for unauthorized persons. Since the scientific research personnel proposed the optical encryption technology of double random phase coding in 1995, the optical encryption and the optical information hiding present a vigorous development situation, and the development and the exploration of the optical image encryption and hiding technology have high academic and application values in the present of large data information leakage, illegal copying and propagation. Most of the achievements of the existing optical information security technology use coherent light as an illumination light source to encrypt or hide two-dimensional image information, but the coherent light is used as illumination, so that the noise is high, and the security is low.
Disclosure of Invention
The invention aims to provide a method and a system for recovering image information hidden information based on white light interference, which are used for reducing coherent noise, improving the quality and speed of recovering the information hidden information and improving the safety of the system.
In order to achieve the purpose, the invention provides the following scheme:
an image information hiding method based on white light interference is characterized by comprising the following steps:
acquiring an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system;
scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key;
and integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image.
Optionally, the determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of the piezoelectric actuator in the white light interference imaging system specifically includes:
according to formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interferogram is shown, L represents the spatial travel distance per piezoelectric actuator scan, and n represents the number of interferograms.
Optionally, the integrating the compressed interferogram set and hiding the integrated data in the host image to obtain an information hidden image specifically includes:
γ (Π) according to the formula S ═ γ ═ Γ-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
An image information hiding system based on white light interference, comprising:
the interference pattern set acquisition module is used for acquiring an interference pattern set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
an interferogram spatial position determining module, configured to determine a spatial position of each interferogram according to the interferogram in the interferogram set and a spatial movement distance of a piezoelectric actuator in the white light interferometric imaging system;
the interference pattern scrambling module is used for scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
the interference pattern compression module is used for compressing each interference pattern in the scrambling interference pattern set to obtain a compressed interference pattern set and a compressed matrix key;
and the information hidden image acquisition module is used for integrating the compressed interference image set and hiding the integrated data in the host image to obtain an information hidden image.
Optionally, the interference pattern spatial position determining module specifically includes:
an interference pattern spatial position determining unit for determining the spatial position of the interference pattern according to the formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interference pattern is L the spatial movement distance of each piezoelectric actuator scan, and n is the number of interference patterns.
Optionally, the information-hidden image obtaining module specifically includes:
an information hidden image determining unit for determining gamma (Γ) according to the formula S ═ y ═ Γ-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
An image information recovery method based on white light interference is characterized by comprising the following steps:
acquiring an information hiding image;
splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set;
reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain an interferogram set;
and determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
Optionally, the reordering is performed on the interferograms in the scrambled interferogram set to obtain an interferogram set, and specifically includes:
according to the formula (I)1,I2,I3...Ii...In)＝Π(Γ-1(Υ-1{((S-H)·α-1) })) determining a set of interferograms; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π denotes the ordering, Γ denotes the order-1Representing decompression, gamma-1Indicating split, alpha indicating attenuation factor, H indicating host image, and S indicating information hiding image.
An image information recovery system based on white light interference, comprising:
the information hidden image acquisition module is used for acquiring an information hidden image;
the information hidden image splitting module is used for splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
the compressed interference image decompression module is used for decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambled interference image set;
the interference pattern set obtaining module is used for reordering the interference patterns in the scrambling interference pattern set according to a scrambling mode key to obtain an interference pattern set;
and the sample image determining module is used for determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
A method for recovering hidden information of image information based on white light interference comprises the following steps: an image information hiding process and an image information restoring process;
the image information hiding process specifically comprises the following steps:
acquiring an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system;
scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key;
integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image;
the image information recovery process specifically comprises the following steps:
acquiring an information hiding image;
splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set;
reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain an interferogram set;
and determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a method and a system for recovering hidden information of image information based on white light interference. Meanwhile, a white light interference imaging system is adopted to collect an interference pattern, so that coherent noise can be reduced, and the technical cost can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flowchart of an image information hiding method based on white light interference according to an embodiment of the present invention;
FIG. 2 is a flowchart of an image information recovery method based on white light interference according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an image information hiding system based on white light interference according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an image information recovery system based on white light interference according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a white light interference imaging system according to an embodiment of the present invention;
fig. 6 is an experimental diagram for hiding image information based on white light interference according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method and a system for recovering image information hidden information based on white light interference, which are used for reducing coherent noise, improving the quality and speed of recovering the information hidden information and improving the safety of the system.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1
Fig. 1 is a flowchart of an image information hiding method based on white light interference according to an embodiment of the present invention, and as shown in fig. 1, an image information hiding method based on white light interference according to the present invention includes:
s101, acquiring an interference pattern set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting the interference patterns.
And S102, determining the spatial position of each interference pattern according to the interference patterns in the interference pattern set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system. In particular, according to the formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interferogram is shown, L represents the spatial travel distance per piezoelectric actuator scan, and n represents the number of interferograms.
S103, scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambling interference pattern set and a scrambling mode key.
S104, compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key.
And S105, integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image. Specifically, γ (Γ) is determined according to the formula S ═ γ ═ Γ (Π)-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
Example 2
Fig. 2 is a flowchart of an image information recovery method based on white light interference according to an embodiment of the present invention, and as shown in fig. 2, an image information recovery method based on white light interference according to the present invention includes:
s201, acquiring the information hiding image.
S202, splitting the information hiding image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms.
S203, decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set.
S204, reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain the interferogram set. The method specifically comprises the following steps: according to the formula (I)1,I2,I3...Ii...In)＝Π(Γ-1(Υ-1{((S-H)·α-1) })) determining a set of interferograms; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π denotes the ordering, Γ denotes the order-1Representing relief, γ-1Indicating split, alpha indicating attenuation factor, H indicating host image, and S indicating information hiding image.
S205, determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
Example 3
Fig. 3 is a schematic structural diagram of an image information hiding system based on white light interference according to an embodiment of the present invention, and as shown in fig. 3, an image information hiding system based on white light interference according to the present invention includes:
an interferogram set acquiring module 101, configured to acquire an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting the interference patterns.
And an interferogram spatial position determining module 102, configured to determine a spatial position of each interferogram according to the interferograms in the interferogram set and a spatial moving distance of a piezoelectric actuator in the white light interferometric imaging system.
And the interference pattern scrambling module 103 is configured to scramble the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key.
And the interferogram compression module 104 is configured to compress each interferogram in the scrambled interferogram set to obtain a compressed interferogram set and a compressed matrix key.
And an information hidden image obtaining module 105, configured to integrate the compressed interferogram set, and hide the integrated data in a host image to obtain an information hidden image.
Preferably, the interferogram space position determining module 102 specifically includes: an interference pattern spatial position determining unit for determining the spatial position of the interference pattern according to the formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interference pattern is L the spatial movement distance of each piezoelectric actuator scan, and n is the number of interference patterns.
Preferably, the information-hidden-image obtaining module 105 specifically includes: an information hidden image determining unit for determining gamma (Γ) according to the formula S ═ y ═ Γ-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
This embodiment corresponds to embodiment 1, and the relevant portions refer to embodiment 1, which is not described herein again.
Example 4
Fig. 4 is a schematic structural diagram of an image information recovery system based on white light interference according to an embodiment of the present invention, and as shown in fig. 4, an image information recovery system based on white light interference according to the present invention includes:
an information hidden image obtaining module 201, configured to obtain an information hidden image.
The information hidden image splitting module 202 is configured to split the information hidden image to obtain a compressed interferogram set; the compressed interferogram set comprises a plurality of compressed interferograms.
And the compressed interferogram decompressing module 203 is configured to decompress each compressed interferogram in the compressed interferogram set according to the compression matrix key to obtain a scrambled interferogram set.
An interferogram set obtaining module 204, configured to reorder the interferograms in the scrambled interferogram set according to the scrambling mode key to obtain an interferogram set.
And the sample image determining module 205 is configured to determine a sample image according to the interferogram set by using a white light interference phase shift recovery algorithm, where the sample image is hidden information.
This embodiment corresponds to embodiment 2, and the relevant portions can be referred to embodiment 2, which is not described herein again.
Example 5
The embodiment of the invention provides an image information hiding information recovery method based on white light interference, which comprises the image information hiding method in the embodiment 1 and the image information recovery method in the embodiment 2.
A more specific embodiment is provided below:
1. hiding image information:
step 1: acquiring an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting the interference patterns.
The white light interference imaging system is shown in fig. 5, and the experimental parameters are as follows: white light: the embodiment of the invention adopts a fiber halogen lamp white light source with the central wavelength of 600 nm. PZT (piezo activators): piezoelectric actuator (PSt150/100VS14) is a nano-scale precision translation stage. Al (achromatic lens): an achromatic lens. BS: a beam splitter prism. QWP (weight ratio): a quarter-wave plate. Pol: a polarizing plate. MIO (Mirauuinterferenceobjective): fizeau interference objective, fixed magnification objective producing interference fringes. Tl (tube lens): tube mirror, imaging lens group. CCD: the CCD (model IGV-B4020M-KF000) pixel size of IMPERX is 9um, and the actual usage wavefront size is 1000X1000 pixels. PC: and a computer connected with the CCD and the PZT.
Due to the stability of the white light interference imaging system, the laser is embedded into the light path, the collimation effect of the whole light path can be completed only by adjusting the upper knob, the lower knob, the left knob and the right knob which are fixed on the support of the laser, for the well-collimated light path, the distance between the interference objective and an object is adjusted (z is approximately equal to 4mm), the illumination laser is projected onto the CCD through the tube lens to obtain better coherent light interference fringes, then the laser is closed, the white light source is opened, the interference fringes on the CCD are changed into colors, a series of color interference patterns with the movement of the central maximum fringe can be obtained through the electrically controlled piezoelectric ceramic translation platform for bearing the three-dimensional object, and finally the CCD receives the interference patterns and transmits the interference patterns to the PC computer.
And (3) setting up a white light interference imaging system experiment specification:
(1) the white light interference imaging system has the stability and portability which are not available in the traditional optical experiment platform, and the built light path can be well moved, displayed and applied.
(2) The closed-loop PZT is used, because in ultra-precise nanometer-scale movement, the mode of changing the position of the pressing has a nonlinear trend, and the closed-loop controller can well fit errors existing in the movement.
(3) The hidden objects adopted in most experiments are two-dimensional picture and character information, the information quantity is small, the information is easy to perceive and the like, and severe tests are provided for a hidden system.
(4) The white light source used in the white light interference technology belongs to an incoherent light source, coherent noise can be introduced into a reflective object through coherent interference and diffraction imaging, and the white light source can better avoid the introduction of the noise due to the own property, so that hidden information can be recovered more effectively.
Fig. 5 shows a schematic diagram of white light interference, which is one type of incoherent light source whose transmission is mostly in the form of spherical waves. However, in order to obtain an accurate magnification image, the image needs to be collimated to obtain a plane wave form, collimated white light passes through the BS dichroic prism and then irradiates on the fizeau interference objective, the white light irradiates on the reference plate and the surface of the three-dimensional object under the action of the beam splitter inside the fizeau objective, and two returned light beams are converged by the tube mirror and interfere on the CCD wavefront to form an interference pattern, which is recorded. The PC controls the recording of the CDD and the position and travel of the PZT for each translation.
Specifically, a white light interference imaging system is firstly built, the voltage loaded to the two ends of the piezoelectric ceramics by the piezoelectric brake PZT is adjusted to control the distance of each micro-movement of the ceramics, when a central maximum stripe appears in a CCD for collecting images, the spatial position of the current PZT is recorded as a displacement zero point, and then the voltage is increased linearly every time. Adjusting the exposure time inside the CCD to synchronize the refresh rate of the real-time collected image and the displacement change rate of the PZT controlled piezoelectric ceramic, and using an imaging system to longitudinally scan the height of the sample, namely, collecting a series of interferograms of the three-dimensional image information to be hidden through a white light interference imaging system.
Step 2: and determining the spatial position of each interference pattern according to the interference patterns in the interference pattern set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system.
The interference patterns obtained by collection respectively correspond to I1,I2,I3...Ii...InWherein n represents the scanning order in the longitudinal scanning process, i.e. the number of interference patterns, and L represents the spatial movement distance of each PZT longitudinal scanning (the size of L is related to the central wavelength of the white light source), because the white light interference fringe at different spatial positions has greatly different interference, and the center of the interference fringe greatly reflects the height of the object, the spatial position of the three-dimensional shape of the object is determined, according to the formula PiN determines the spatial position of each interferogram, and each acquired interferogram I corresponds to a unique spatial position P.
And step 3: scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key; compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key; and integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image.
Specifically, γ (Γ) is determined according to the formula S ═ γ ═ Γ (Π)-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image. In the embodiment of the present invention, RLE run-length encoding (RLE) lossless compression is used for compression.
2. And (3) image information recovery:
and 4, step 4: and acquiring the information hiding image.
And 5: splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms; decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set; and reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain the interferogram set.
In particular, according to the formula (I)1,I2,I3...Ii...In)＝Π(Γ-1(Υ-1{((S-H)·α-1) })) determining a set of interferograms; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π denotes the ordering, Γ denotes the order-1Representing relief, γ-1Indicating split, alpha indicating attenuation factor, H indicating host image, and S indicating information hiding image.
Step 6: and determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
Specifically, the rearranged interferograms are applied to the correct spatial position P to restore the three-dimensional morphology of the sample, and a white light interference phase shift recovery algorithm is used to restore the three-dimensional morphology of the obtained interferograms, so that hidden information can be obtained.
Fig. 6 is an image information hiding experimental diagram based on white light interference according to an embodiment of the present invention, and as shown in fig. 6, a simulated three-dimensional object in an experiment is generated by a peak function, a sampling size of the simulated three-dimensional object is 9um, and a longitudinal height resolution is in a nanometer level.
Step1 corresponds to the process of the interferogram obtained by scanning and collecting in the Step1 and the Step 2;
step2 corresponds to the process of scrambling and compressing the obtained interferogram in Step3 to integrate into one tif image. This process results in a scrambling scheme and a compression matrix key.
Step3 represents the process of hiding the secret tif image into the host image in Step3, which results in a private key decay factor α, while the public key is a known class of host images on the web.
The white light serving as incoherent light not only has the advantages of reducing coherent noise, reducing technical cost and the like, but also can observe three-dimensional microscale reflective images by using the white light interference imaging technology, thereby providing theoretical support for feasibility of materialization of an optical safety information system. Therefore, the application of the three-dimensional imaging technology based on white light interference to the field of optical information security has profound significance.
The invention has the advantages that:
the main criteria of the optical information hiding scheme are: security, encrypted information capacity, imperceptibility, robustness, number of keys, etc.
1. Compressibility: because the storage space of the file is large and the internal hidden information is easy to find due to the fact that a plurality of interference patterns are placed in one tif picture in the transmission process, the compression mode selected by the invention is RLE lossless compression, the compression ratio is 65.72%, and the compression mode can realize hundreds of percent recovery of the hidden microscopic three-dimensional information under the ideal condition.
2. Safety: the central wavelength, the micro-displacement step length, the compression generation matrix, the sequence and the position of the interference pattern and the like of the white light source can be used as the guarantee of the system safety.
3. Robustness: the robustness analysis of the invention is carried out in a computer simulation mode. Respectively adding 5%, 10% and 15% random white noise to a host image of the hidden information, and then respectively reconstructing the image. Through simulation analysis and verification, the recovered three-dimensional image can still be distinguished, and the system has strong anti-noise capability.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. An image information hiding method based on white light interference is characterized by comprising the following steps:
acquiring an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system;
scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key;
integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image;
the determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of the piezoelectric actuator in the white light interference imaging system specifically includes:
according to formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interferogram is shown, L represents the spatial travel distance per piezoelectric actuator scan, and n represents the number of interferograms.
2. The method for hiding image information based on white light interference as claimed in claim 1, wherein the integrating the compressed interferogram set and hiding the integrated data in the host image to obtain the information hidden image specifically comprises:
γ (Π) according to the formula S ═ γ ═ Γ-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
3. An image information hiding system based on white light interference, comprising:
the interference pattern set acquisition module is used for acquiring an interference pattern set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
an interferogram spatial position determining module, configured to determine a spatial position of each interferogram according to the interferogram in the interferogram set and a spatial movement distance of a piezoelectric actuator in the white light interferometric imaging system;
the interference pattern scrambling module is used for scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
the interference pattern compression module is used for compressing each interference pattern in the scrambling interference pattern set to obtain a compressed interference pattern set and a compressed matrix key;
the information hidden image acquisition module is used for integrating the compressed interference image set and hiding the integrated data in a host image to obtain an information hidden image;
the interference pattern space position determining module specifically comprises:
an interference pattern spatial position determining unit for determining the spatial position of the interference pattern according to the formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interference pattern is L the spatial movement distance of each piezoelectric actuator scan, and n is the number of interference patterns.
4. The white-light interference based image information hiding system according to claim 3, wherein the information hiding image obtaining module specifically comprises:
an information hidden image determining unit for determining gamma (Γ) according to the formula S ═ y ═ Γ-1(I1,I2,I3...Ii...In) ) } · α + H determines an information hiding image; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π-1Representing scrambling, Γ representing compression, γ representing integration, α representing attenuation factor, H representing host image, S representing information hiding image.
5. An image information recovery method based on white light interference is characterized by comprising the following steps:
acquiring an information hiding image;
splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set;
reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain an interferogram set;
and determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
6. The method for recovering image information based on white light interference according to claim 5, wherein the reordering of the interferograms in the scrambled interferogram set to obtain an interferogram set specifically comprises:
according to the formula (I)1,I2,I3...Ii...In)＝Π(Γ-1(Υ-1{((S-H)·α-1) })) determining a set of interferograms; wherein, IiDenotes the ith interferogram, i is 1,2,3.. n, n denotes the number of interferograms, Π denotes the ordering, Γ denotes the order-1Representing relief, γ-1Indicating split, alpha indicating attenuation factor, H indicating host image, and S indicating information hiding image.
7. An image information recovery system based on white light interference, comprising:
the information hidden image acquisition module is used for acquiring an information hidden image;
the information hidden image splitting module is used for splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
the compressed interference image decompression module is used for decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambled interference image set;
the interference pattern set obtaining module is used for reordering the interference patterns in the scrambling interference pattern set according to a scrambling mode key to obtain an interference pattern set;
and the sample image determining module is used for determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
8. A method for recovering hidden information of image information based on white light interference is characterized by comprising the following steps: an image information hiding process and an image information restoring process;
the image information hiding process specifically comprises the following steps:
acquiring an interferogram set; the interference pattern set comprises a plurality of interference patterns, and the interference pattern set is a series of interference patterns obtained by scanning different positions of a sample by using a white light interference imaging system and collecting;
determining the spatial position of each interferogram according to the interferogram in the interferogram set and the spatial movement distance of a piezoelectric actuator in the white light interference imaging system, specifically comprising:
according to formula PiN determining the spatial position of each interferogram; wherein, PiThe spatial position of the ith interference pattern is shown, L represents the spatial movement distance of each piezoelectric actuator scanning, and n represents the number of the interference patterns;
scrambling the interference patterns in the interference pattern set according to the spatial positions of the interference patterns to obtain a scrambled interference pattern set and a scrambling mode key;
compressing each interferogram in the scrambling interferogram set to obtain a compressed interferogram set and a compressed matrix key;
integrating the compressed interference pattern set, and hiding the integrated data in a host image to obtain an information hidden image;
the image information recovery process specifically comprises the following steps:
acquiring an information hiding image;
splitting the information hidden image to obtain a compressed interference image set; the compressed interferogram set comprises a plurality of compressed interferograms;
decompressing each compressed interference image in the compressed interference image set according to the compressed matrix key to obtain a scrambling interference image set;
reordering the interferograms in the scrambling interferogram set according to the scrambling mode key to obtain an interferogram set;
and determining a sample image by adopting a white light interference phase shift recovery algorithm according to the interference pattern set, wherein the sample image is hidden information.
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