CN113704710B - Information hiding method and device and computer storage medium - Google Patents
Information hiding method and device and computer storage medium Download PDFInfo
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- CN113704710B CN113704710B CN202110996843.1A CN202110996843A CN113704710B CN 113704710 B CN113704710 B CN 113704710B CN 202110996843 A CN202110996843 A CN 202110996843A CN 113704710 B CN113704710 B CN 113704710B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/16—Program or content traceability, e.g. by watermarking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/46—Embedding additional information in the video signal during the compression process
- H04N19/467—Embedding additional information in the video signal during the compression process characterised by the embedded information being invisible, e.g. watermarking
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Abstract
The invention discloses an information hiding method, an information hiding device and a computer storage medium, relates to the technical field of information processing, and solves the technical problem of low confidentiality of hidden information. The information hiding method comprises the following steps: acquiring a first image and a second image; processing the first image through a frequency domain algorithm to obtain a gray level image; carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image; and embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to an information hiding method, an information hiding device, and a computer storage medium.
Background
Information hiding means embedding secret information into a carrier by utilizing human perception and redundancy of digital media so as to track the use of the carrier, thereby achieving the purposes of copyright protection, integrity authentication and the like.
In the information hiding algorithm in the prior art, the frequency domain algorithm has more robustness, the watermark failure problem caused by the fact that the picture is damaged can be prevented, the information hidden by the frequency domain algorithm is easy to display, and the confidentiality of the hidden content is low.
Accordingly, those skilled in the art have focused on developing an information hiding method, apparatus, and computer storage medium that can improve the confidentiality of hidden information.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: the confidentiality of the hidden information is low.
In order to achieve the above purpose, the invention adopts the following technical scheme:
In a first aspect, the present invention provides an information hiding method, including: acquiring a first image and a second image; processing the first image through a frequency domain algorithm to obtain a gray level image; carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image; and embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm.
In the embodiment of the invention, since the second image can be subjected to gray processing according to the gray map, the gray distribution of the image after sub-affine transformation can be more similar to the target image channel of the first image, and when the third image is embedded into the gray map, the gray distribution of the gray map cannot be greatly changed, so that the characteristic of sub-affine transformation is combined with the frequency domain algorithm, the protection capability of hidden information can be improved, and the information in the second image can be better hidden.
In a preferred embodiment of the present invention, the second image includes a blank area, and the performing gray scale processing on the second image according to the gray scale map includes: determining a first pixel value distribution proportion of the gray scale map; and adding pixels in the blank area according to the first pixel value distribution proportion until the pixel value distribution proportion of the second image is the first pixel value distribution proportion.
In the embodiment of the invention, the pixel value distribution proportion of the second image can reach the first pixel value distribution proportion by adding the pixels, so that the image gray distribution after sub-affine transformation can be more similar to the target image channel of the first image, the difficulty in analyzing and identifying the image gray distribution is increased, and the confidentiality of hidden information is further improved.
In a preferred embodiment of the present invention, the second image includes an information area, and after the fourth image hiding the second image is obtained, the method further includes: acquiring the fourth image; converting the fourth image through the frequency domain algorithm, and extracting the third image; and carrying out sub-affine period reduction on the third image to obtain an image after the gray level processing of the second image, wherein the image after the gray level processing comprises text information in the information area.
In the embodiment of the invention, the hidden text information can be restored from the fourth image, so that the information hidden in the image can be restored, thereby achieving the secret protection of the hidden information.
In a preferred embodiment of the present invention, the frequency domain algorithm is a fast fourier transform algorithm, and the frequency domain restoration algorithm is a fast fourier transform restoration algorithm.
In a preferred embodiment of the present invention, the processing the first image by the frequency domain algorithm includes: and processing pixels of a target image channel of the first image through the frequency domain algorithm, wherein the target image channel is any one of the image channels of the first image.
In the embodiment of the invention, because the target image channel can be any one of the image channels of the first image, a user can select any one of the four image channels for information hiding, so that the randomness of information hiding is increased, and the confidentiality of hidden information is improved.
In a second aspect, the present invention provides an information hiding apparatus, comprising: an acquisition unit and a processing unit; the acquisition unit is used for acquiring a first image and a second image; the processing unit is used for processing the first image through a frequency domain algorithm to obtain a gray level image; carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image; and embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm.
In a preferred embodiment of the present invention, the processing unit is specifically configured to: determining a first pixel value distribution proportion of the gray scale map; and adding pixels in the blank area according to the first pixel value distribution proportion until the pixel value distribution proportion of the second image is the first pixel value distribution proportion.
In a preferred embodiment of the present invention, the acquiring unit is further configured to acquire the fourth image; the processing unit is further configured to convert the fourth image through the frequency domain algorithm, and extract the third image; and carrying out sub-affine period reduction on the third image to obtain an image after the gray level processing of the second image, wherein the image after the gray level processing comprises text information in the information area.
In a preferred embodiment of the present invention, the frequency domain algorithm is a fast fourier transform algorithm, and the frequency domain restoration algorithm is a fast fourier transform restoration algorithm.
In a preferred embodiment of the present invention, the processing unit is specifically configured to: and processing pixels of a target image channel of the first image through the frequency domain algorithm, wherein the target image channel is any one of the image channels of the first image.
In a third aspect, the present invention provides an information hiding apparatus comprising a memory and a processor. The memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus. When the information hiding device is running, the processor executes computer-executable instructions stored in the memory to cause the information hiding device to perform the information hiding method provided in the above first aspect and its various possible embodiments.
In a fourth aspect, a computer readable storage medium is provided, the computer readable storage medium comprising computer executable instructions which, when run on a computer, cause an information hiding device to perform the information hiding method provided by the above first aspect and its various possible embodiments.
In a fifth aspect, a computer program product is provided, comprising computer instructions which, when run on a computer, cause an information hiding apparatus to perform the information hiding method provided by the above first aspect and its various possible embodiments.
It should be noted that the above-mentioned computer instructions may be stored in whole or in part on a computer-readable storage medium. The computer readable storage medium may be packaged together with the processor executing the information hiding apparatus or may be packaged separately from the processor executing the information hiding apparatus, which is not limited by the embodiment of the present invention.
The description of the second, third, fourth and fifth aspects of the present invention may refer to the detailed description of the first aspect; moreover, the advantages described in the second aspect, the third aspect, the fourth aspect and the fifth aspect may refer to the analysis of the advantages of the first aspect, and are not described herein.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of an information hiding method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of image processing provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of an information hiding apparatus according to an embodiment of the present invention;
fig. 4 is a second schematic structural diagram of an information hiding device according to an embodiment of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present invention is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
In order to clearly describe the technical solution of the embodiment of the present invention, in the embodiment of the present invention, the words "first", "second", etc. are used to distinguish identical items or similar items having substantially the same function and effect, and those skilled in the art will understand that the words "first", "second", etc. are not limited in number and execution order.
Some exemplary embodiments of the invention have been described for illustrative purposes, it being understood that the invention may be practiced otherwise than as specifically shown in the accompanying drawings.
The foregoing implementations are described in detail below with reference to specific embodiments and accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides an information hiding method that can be applied to an information hiding apparatus. The information hiding device may be a component, an integrated circuit, or a chip in the terminal, may be a mobile electronic device such as a notebook computer, or may be a non-mobile electronic device such as a server. The information hiding method may include: S101-S104:
S101, the information hiding device acquires a first image and a second image.
The first image may be a color image, and the second image may be a black-and-white image or a gray-scale image containing watermark information. The first image includes 4 image channels, an A (alph) image channel, an R (red) image channel, a G (green) image channel, and a B (blue) image channel, respectively. The second image includes one image channel, the a image channel. Each image channel may include 8 bit planes.
The bit plane is a plane formed by taking an image as a bottom surface and taking 8-bit binary numbers representing the brightness of pixels as heights, and the positions of pixels in the formed stereo histogram are the same.
Alternatively, the information hiding device may acquire the first image first and then acquire the second image; the first image and the second image may be acquired simultaneously, and may be specifically determined according to actual use conditions, which is not limited in the embodiment of the present application.
S102, the information hiding device processes the first image through a frequency domain algorithm to obtain a gray level image.
Alternatively, the information hiding means may process pixels of a target image channel of the first image, which may be any one of the image channels of the first image, by a frequency domain algorithm, thereby obtaining a gray scale map.
Optionally, after the first image is acquired, the information hiding device may determine the target image channel from the 4 image channels in a random determination manner or in a manner of selecting and determining by user input, and then convert each pixel in the target image channel through a frequency domain algorithm, so as to obtain a gray scale map corresponding to the target image channel. Since the number of bits per pixel value is 8, the pixel values in the gray scale map may be distributed in the gray scale interval range of 0-255.
Alternatively, the frequency domain algorithm may be a fast fourier transform (Fast Fourier Transform, FFT) algorithm.
And S103, the information hiding device carries out gray scale processing on the second image according to the gray scale image, and carries out affine transformation scrambling on the image subjected to the gray scale processing to obtain a third image.
Alternatively, after the above-mentioned gray-scale image is obtained, the information hiding means may perform gray-scale processing on the second image according to the gray-scale image. Specifically, the second image may include a blank area, and the information hiding device may determine a first pixel value distribution ratio of the gray scale image; and adding pixels in the blank area of the second image according to the first pixel value distribution ratio until the pixel value distribution ratio of the second image is the first pixel value distribution ratio.
Illustratively, the gray scale map includes 10000 pixels and the second image includes 5000 pixels. If the number of pixels with a pixel value of a is 2000, the number of pixels with a pixel value of b is 3000, the number of pixels with a pixel value of c is 5000, and the number of pixels with a pixel value of a in the second image is 1000, the number of pixels with a pixel value of b is 0, and the number of pixels with a pixel value of c is 4000 in the gray image, the information hiding apparatus may determine that the first pixel value distribution ratio of the gray image includes: the pixel distribution ratio of the pixel value a is 20%, the pixel distribution ratio of the pixel value b is 30%, and the pixel distribution ratio of the pixel value c is 50%. Then, the number of pixels with the pixel value of a in the second image is 1000, and the pixels account for 20% of the second image, so that the pixels with the pixel value of a do not need to be increased; since the number of pixels with the pixel value b is 0 and the number of pixels with the pixel value c is 4000, the information hiding device may increase 1500 pixels with the pixel value b on the pixels with the pixel value c, so that the proportion of the pixels with the pixel value b in the second image is 30 percent and the proportion of the pixels with the pixel value c in the second image is 50 percent.
Optionally, after the gray processing is performed on the second image, since pixels are added in a blank area of the second image, the pixel distribution of the same pixel value is relatively concentrated, and in order to improve the concealment of the hidden information in the second image, the image after the gray processing may be subjected to sub-affine transformation scrambling, so as to obtain a third image with uniformly distributed pixel values. As shown in fig. 2 (a), is a second image; as shown in fig. 2 (b), the second image is subjected to gradation processing; as shown in fig. 2 (c), a third image is obtained.
Optionally, the information hiding device may scramble the image after the gray processing by sub-affine transformation for a preset number of times, to obtain a third image. The preset number of times may be greater than or equal to 20.
It should be noted that, the sub-affine transformation scrambling refers to the following formula one: or formula 2: /(I) And transforming the coordinates of the pixel points of the image. And the sub-affine transformation scrambling satisfies: the condition 1, the change is the single mapping of the discrete point domain { (x, y): 1.ltoreq.x.ltoreq.N, 1.ltoreq.y.ltoreq.N } to itself; the condition 2, the variation is the full mapping of the discrete point domain { (x, y): 1. Ltoreq.x. Ltoreq.N, 1. Ltoreq.y. Ltoreq.N } to itself. Wherein x, y represent coordinate values before transformation, x ', y' represent coordinate values after transformation, N represent steps a, b, c, d, e, f of the digital image, and are integers. The method is characterized in that a given N-order digital image is subjected to the transformation for a plurality of times, each pixel point is scrambled and uniformly distributed in the image, and the original image can be restored after the times reach a certain period. In the embodiment of the present application, the solution of the affine transformation scrambling may be determined as a=0, b= -1, c=1, d= -1, e=n+1, f=1.
And S104, the information hiding device embeds the third image into the gray level image, and obtains a fourth image hiding the second image through a frequency domain restoration algorithm.
Alternatively, the information hiding device may embed the third image into the gray scale image, and then obtain a fourth image hiding the second image through a frequency domain restoration algorithm.
Alternatively, since the pixels are typically represented in binary, the information hiding means may embed the third image in the gray map by and, or. Taking as an example that the pixel 1 in the third image is embedded in the pixel 2 at the position corresponding to the gray-scale image. The pixel value of the pixel 1 is 1010, the pixel value of the pixel 2 is 0110, if the embedding rule is that the values on the same pixel bit are the same, 1 is the same, and if the embedding rule is different, 0 is the different, then the pixel value of the pixel 2 after the pixel 1 is embedded is 0011.
In the case that the frequency domain algorithm is an FFT algorithm, the frequency domain restoration algorithm may be a fast fourier transform restoration algorithm, that is, an FFT restoration algorithm.
Alternatively, after obtaining the fourth image in which the second image is hidden, the information hiding means may also obtain hidden information from the fourth image. Specifically, the second image may include an information area, and for example, as shown in fig. 2 (a), the information area may include watermark information of "secinfo". The information hiding device may first acquire a fourth image; the fourth image is converted by the frequency domain algorithm, and then, the converted image and the gray level image without hidden information can be subjected to pixel comparison based on the embedding rule, so that a third image, namely the image shown in (c) in fig. 2, is extracted from the converted image, and then, the third image is subjected to sub-affine period reduction, so that an image after gray level processing of the second image, namely the image shown in (b) in fig. 2, is obtained, wherein the image after gray level processing comprises text information in an information area. Thus, watermark information of "secinfo" may be determined directly from the image.
In the embodiment of the invention, since the second image can be subjected to gray processing according to the gray map, the gray distribution of the image after sub-affine transformation can be more similar to the target image channel of the first image, and when the third image is embedded into the gray map, the gray distribution of the gray map cannot be greatly changed, so that the characteristic of sub-affine transformation is combined with the frequency domain algorithm, the protection capability of hidden information can be improved, and the information in the second image can be better hidden.
The foregoing description of the solution provided by the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
According to the information hiding method provided by the embodiment of the application, the execution main body can be an information hiding device or a control module for information hiding in the information hiding device. In the embodiment of the present application, an information hiding method performed by an information hiding device is taken as an example, and the information hiding device provided by the embodiment of the present application is described.
It should be noted that, in the embodiment of the present application, the information hiding device may be divided into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiment of the present application is schematic, which is merely a logic function division, and other division manners may be implemented in practice.
As shown in fig. 3, an embodiment of the present application provides an information hiding apparatus 300. The information hiding apparatus 300 includes: an acquisition unit 301 and a processing unit 302. The acquiring unit 301 may be configured to acquire a first image and a second image; the processing unit 302 may be configured to process the first image by using a frequency domain algorithm to obtain a gray scale map; carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image; and embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm.
Optionally, the processing unit 302 may be specifically configured to: determining a first pixel value distribution proportion of the gray scale map; and adding pixels in the blank area according to the first pixel value distribution proportion until the pixel value distribution proportion of the second image is the first pixel value distribution proportion.
Optionally, the acquiring unit 301 may be further configured to acquire the fourth image; a processing unit 302, further configured to convert the fourth image by using the frequency domain algorithm, and extract the third image; and carrying out sub-affine period reduction on the third image to obtain an image after the gray level processing of the second image, wherein the image after the gray level processing comprises text information in the information area.
Optionally, the frequency domain algorithm is a fast fourier transform algorithm, and the frequency domain restoration algorithm is a fast fourier transform restoration algorithm.
Optionally, the processing unit 302 may be specifically configured to: and processing pixels of a target image channel of the first image through the frequency domain algorithm, wherein the target image channel is any one of the image channels of the first image.
Of course, the information hiding apparatus 300 provided by the embodiment of the present application includes, but is not limited to, the above-described units.
According to the information hiding device provided by the embodiment of the invention, since the second image can be subjected to gray processing according to the gray map, the gray distribution of the image after sub-affine transformation can be more similar to the target image channel of the first image, and when the third image is embedded into the gray map, the gray distribution of the gray map cannot be greatly changed, so that the characteristic of sub-affine transformation is combined with the frequency domain algorithm, the protection capability of hidden information can be improved, and the information in the second image can be better hidden.
The embodiment of the application also provides an information hiding device as shown in fig. 4, which comprises a processor 11, a memory 12, a communication interface 13 and a bus 14. The processor 11, the memory 12 and the communication interface 13 may be connected by a bus 14.
The processor 11 is a control center of the information hiding apparatus, and may be one processor or a collective name of a plurality of processing elements. For example, the processor 11 may be a general-purpose central processing unit (central processing unit, CPU), or may be another general-purpose processor. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.
As an example, processor 11 may include one or more CPUs, such as CPU 0 and CPU 1 shown in fig. 4.
Memory 12 may be, but is not limited to, read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or electrically erasable programmable read-only memory (EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
In a possible implementation, the memory 12 may exist separately from the processor 11, and the memory 12 may be connected to the processor 11 through the bus 14 for storing instructions or program code. When the processor 11 invokes and executes the instructions or the program codes stored in the memory 12, the deployment method of the service function chain provided by the embodiment of the application can be realized.
In another possible implementation, the memory 12 may also be integrated with the processor 11.
A communication interface 13 for connecting with other devices via a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), etc. The communication interface 13 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.
Bus 14 may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
It should be noted that the structure shown in fig. 4 does not constitute a limitation of the information hiding means. The information hiding means may include more or less components than those shown in fig. 4, or some components may be combined, or different component arrangements.
The embodiments of the present invention also provide a computer-readable storage medium including computer-executable instructions. When the computer-executable instructions are executed on a computer, the computer is caused to perform the steps performed by the information hiding apparatus in the information hiding method provided in the above-described embodiment.
The embodiment of the invention also provides a computer program product which can be directly loaded into a memory and contains software codes, and the computer program product can realize the steps executed by the information hiding device in the information hiding method provided by the embodiment after being loaded and executed by a computer.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising several instructions for causing a terminal to perform the method according to the embodiments of the present invention.
The above embodiments are merely illustrative of the principles and functions of the present invention, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.
Claims (10)
1. An information hiding method, comprising:
Acquiring a first image and a second image;
processing the first image through a frequency domain algorithm to obtain a gray level image;
carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image;
embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm;
The gray scale processing of the second image according to the gray scale map includes:
And adding pixels in the second image until the pixel value distribution proportion of the second image is the same as that of the gray scale.
2. The information hiding method according to claim 1, wherein the second image includes a blank area, and the performing gray processing on the second image according to the gray map includes:
determining a first pixel value distribution proportion of the gray scale map;
And adding pixels in the blank area according to the first pixel value distribution proportion until the pixel value distribution proportion of the second image is the first pixel value distribution proportion.
3. An information hiding method according to claim 1 or2, wherein said second image includes an information area, said obtaining a fourth image hiding said second image further comprising:
acquiring the fourth image;
Converting the fourth image through the frequency domain algorithm, and extracting the third image;
And carrying out sub-affine period reduction on the third image to obtain an image after the gray level processing of the second image, wherein the image after the gray level processing comprises text information in the information area.
4. The information hiding method according to claim 1, wherein the frequency domain algorithm is a fast fourier transform algorithm, and the frequency domain restoration algorithm is a fast fourier transform restoration algorithm.
5. The information hiding method according to claim 1, wherein the processing the first image by a frequency domain algorithm includes: and processing pixels of a target image channel of the first image through the frequency domain algorithm, wherein the target image channel is any one of the image channels of the first image.
6. An information hiding apparatus, characterized by comprising: an acquisition unit and a processing unit;
The acquisition unit is used for acquiring a first image and a second image;
the processing unit is used for processing the first image through a frequency domain algorithm to obtain a gray level image; carrying out gray level processing on the second image according to the gray level image, and carrying out affine transformation scrambling on the image subjected to the gray level processing to obtain a third image; embedding the third image into the gray level image, and obtaining a fourth image hiding the second image through a frequency domain restoration algorithm;
the processing unit is specifically configured to: and adding pixels in the second image until the pixel value distribution proportion of the second image is the same as that of the gray scale.
7. The information hiding apparatus according to claim 6, wherein the second image comprises a blank area, the processing unit being specifically configured to: determining a first pixel value distribution proportion of the gray scale map; and adding pixels in the blank area according to the first pixel value distribution proportion until the pixel value distribution proportion of the second image is the first pixel value distribution proportion.
8. The information hiding apparatus as claimed in claim 6 or 7, wherein the second image comprises an information area,
The acquisition unit is further used for acquiring the fourth image;
The processing unit is further configured to convert the fourth image through the frequency domain algorithm, and extract the third image; and carrying out sub-affine period reduction on the third image to obtain an image after the gray level processing of the second image, wherein the image after the gray level processing comprises text information in the information area.
9. An information hiding device, comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus;
When the information hiding apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the information hiding apparatus to perform the information hiding method as claimed in any one of claims 1 to 5.
10. A computer readable storage medium comprising computer executable instructions which, when run on a computer, cause the computer to perform the information hiding method according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996843.1A CN113704710B (en) | 2021-08-27 | 2021-08-27 | Information hiding method and device and computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110996843.1A CN113704710B (en) | 2021-08-27 | 2021-08-27 | Information hiding method and device and computer storage medium |
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