阅读说明：本技术 一种多媒体文件净化方法、装置、存储介质及终端设备 (A kind of multimedia file purification method, device, storage medium and terminal device ) 是由 徐波 于 2019-08-02 设计创作，主要内容包括：本发明公开了一种多媒体文件净化方法,包括：获取待净化的多媒体文件；对所述多媒体文件的文件类型进行识别；其中,所述文件类型包括图像文件、文档文件和视频文件；根据所述文件类型对所述多媒体文件进行净化处理。相应的,本发明还公开了一种多媒体文件净化装置、计算机可读存储介质及终端设备。采用本发明的技术方案能够根据多媒体文件的文件类型净化被隐写的多媒体文件,从而有效防止信息泄露。(The invention discloses a kind of multimedia file purification methods, comprising: obtains multimedia file to be clean；The file type of the multimedia file is identified；Wherein, the file type includes image file, document files and video file；Purified treatment is carried out to the multimedia file according to the file type.Correspondingly, the invention also discloses a kind of multimedia file purification device, computer readable storage medium and terminal devices.It can be purified according to the file type of multimedia file by the multimedia file of steganography, to effectively prevent information leakage using technical solution of the present invention.)

1. a kind of multimedia file purification method characterized by comprising

Obtain multimedia file to be clean；

The file type of the multimedia file is identified；Wherein, the file type includes image file, document files And video file；

Purified treatment is carried out to the multimedia file according to the file type.

2. multimedia file purification method as described in claim 1, which is characterized in that when the file type is image file When, it is described that purified treatment is carried out to the multimedia file according to the file type, it specifically includes:

According to the corresponding identifier identification in binary system of the file suffixes of described image file and described image file The picture format of image file；Wherein, described image format includes jpg format, png format, bmp format, gif format, tga lattice Formula, tif format, tiff format and hdr format；

Purified treatment is carried out to described image file according to described image format.

3. multimedia file purification method as claimed in claim 2, which is characterized in that when described image format is jpg format When, it is described that purified treatment is carried out to described image file according to described image format, it specifically includes:

Obtain all Pixel Informations of described image file；

Filling is re-started according to the Pixel Information, generates purified image file.

4. multimedia file purification method as claimed in claim 2, which is characterized in that when described image format is png format It is described that purified treatment is carried out to described image file according to described image format or when bmp format, it specifically includes:

Random offset processing is carried out to the least significant bit of each pixel of described image file, obtains purified image text Part.

5. multimedia file purification method as claimed in claim 2, which is characterized in that when described image format is gif format When, it is described that purified treatment is carried out to described image file according to described image format, it specifically includes:

Each frame image of described image file is obtained, and records acquisition sequence and the acquisition time interval of each frame image；

Random offset processing is carried out to the least significant bit of each pixel of each frame image；

Treated each frame image is spliced again according to the acquisition sequence of record and acquisition time interval, generates and purifies Image file afterwards.

6. multimedia file purification method as claimed in claim 2, which is characterized in that when described image format is png format It is described that purified treatment is carried out to described image file according to described image format or when tga format, it specifically includes:

The length information and width information of described image file are obtained according to the metadata of described image file；

Described image file is intercepted according to the length information and the width information, obtains purified image text Part.

7. multimedia file purification method as claimed in claim 2, which is characterized in that when described image format be tif format, It is described that purified treatment is carried out to described image file according to described image format when tiff format or hdr format, it specifically includes:

Obtain the color area information of described image file；

Filling is re-started according to the color area information, generates purified image file.

8. multimedia file purification method as described in any one of claims 1 to 7, which is characterized in that when the file type It is described that purified treatment is carried out to the multimedia file according to the file type when for document files, it specifically includes:

Separating treatment is carried out to the writings and image in the document files；

It identifies the picture format for the image isolated, and purified treatment is carried out to the image isolated according to described image format, Obtain purified image；

Combination is re-started according to the text and purified image isolated, obtains purified document files.

9. multimedia file purification method as described in any one of claims 1 to 7, which is characterized in that when the file type It is described that purified treatment is carried out to the multimedia file according to the file type when for video file, it specifically includes:

The data structure of the video file is detected；Wherein, the data structure of the video file is fixed data knot Structure；

Retain the corresponding data of the fixed data structure according to testing result；

Purified video file is regenerated according to the corresponding data of the fixed data structure.

10. a kind of multimedia file purification device characterized by comprising

File acquisition module, for obtaining multimedia file to be clean；

File type identification module is identified for the file type to the multimedia file；Wherein, the file type Including image file, document files and video file；And

File tidying module, for carrying out purified treatment to the multimedia file according to the file type.

11. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage Machine program；Wherein, the equipment where the computer program controls the computer readable storage medium at runtime executes such as Multimedia file purification method according to any one of claims 1 to 9.

12. a kind of terminal device, which is characterized in that including processor, memory and store in the memory and matched It is set to the computer program executed by the processor, the processor is realized when executing the computer program as right is wanted Seek 1~9 described in any item multimedia file purification methods.

Technical field

The present invention relates to multimedia resource processing technology field more particularly to a kind of multimedia file purification method, device, Storage medium and terminal device.

Background technique

The characteristics of there are many Steganographies, Steganography on the market is that will directly to need hiding information to pass through special at present Mode is embedded into carrier (such as multimedia file), and will not damage the expression of information entrained by carrier script, and only It can not identify steganography information whether is carried in carrier through the way of manual viewing, steganography information is easy to be passed through by lawless people Carrier secret carries away.

Summary of the invention

The technical problem to be solved by the embodiment of the invention is that providing a kind of multimedia file purification method, device, meter Calculation machine readable storage medium storing program for executing and terminal device can be purified according to the file type of multimedia file by the multimedia text of steganography Part, to effectively prevent information leakage.

In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of multimedia file purification methods, comprising:

Obtain multimedia file to be clean；

The file type of the multimedia file is identified；Wherein, the file type includes image file, document File and video file；

Purified treatment is carried out to the multimedia file according to the file type.

Further, when the file type be image file when, it is described according to the file type to the multimedia File carries out purified treatment, specifically includes:

The corresponding identifier identification in binary system according to the file suffixes of described image file and described image file The picture format of described image file；Wherein, described image format include jpg format, png format, bmp format, gif format, Tga format, tif format, tiff format and hdr format；

Purified treatment is carried out to described image file according to described image format.

Further, when described image format be jpg format when, it is described according to described image format to described image file Purified treatment is carried out, is specifically included:

Obtain all Pixel Informations of described image file；

Filling is re-started according to the Pixel Information, generates purified image file.

Further, when described image format be png format or bmp format when, it is described according to described image format to institute It states image file and carries out purified treatment, specifically include:

Random offset processing is carried out to the least significant bit of each pixel of described image file, obtains purified figure As file.

Further, when described image format be gif format when, it is described according to described image format to described image file Purified treatment is carried out, is specifically included:

Each frame image of described image file is obtained, and is recorded between the acquisition sequence of each frame image and acquisition time Every；

Random offset processing is carried out to the least significant bit of each pixel of each frame image；

Treated each frame image is spliced again according to the acquisition sequence of record and acquisition time interval, generation Purified image file.

Further, when described image format be png format or tga format when, it is described according to described image format to institute It states image file and carries out purified treatment, specifically include:

The length information and width information of described image file are obtained according to the metadata of described image file；

Described image file is intercepted according to the length information and the width information, obtains purified image File.

Further, described according to described image when described image format is tif format, tiff format or hdr format Format carries out purified treatment to described image file, specifically includes:

Obtain the color area information of described image file；

Filling is re-started according to the color area information, generates purified image file.

Further, when the file type be document files when, it is described according to the file type to the multimedia File carries out purified treatment, specifically includes:

Separating treatment is carried out to the writings and image in the document files；

It identifies the picture format for the image isolated, and the image isolated is carried out at purification according to described image format Reason, obtains purified image；

Combination is re-started according to the text and purified image isolated, obtains purified document files.

Further, when the file type be video file when, it is described according to the file type to the multimedia File carries out purified treatment, specifically includes:

The data structure of the video file is detected；Wherein, the data structure of the video file is fixed number According to structure；

Retain the corresponding data of the fixed data structure according to testing result；

Purified video file is regenerated according to the corresponding data of the fixed data structure.

In order to solve the above-mentioned technical problem, the embodiment of the invention also provides a kind of multimedia file purification devices, comprising:

File acquisition module, for obtaining multimedia file to be clean；

File type identification module is identified for the file type to the multimedia file；Wherein, the file Type includes image file, document files and video file；And

File tidying module, for carrying out purified treatment to the multimedia file according to the file type.

The embodiment of the invention also provides a kind of computer readable storage medium, the computer readable storage medium includes The computer program of storage；Wherein, where the computer program controls the computer readable storage medium at runtime Equipment executes multimedia file purification method described in any of the above embodiments.

The embodiment of the invention also provides a kind of terminal device, including processor, memory and it is stored in the storage In device and it is configured as the computer program executed by the processor, the processor is real when executing the computer program Existing multimedia file purification method described in any of the above embodiments.

It compared with prior art, can the embodiment of the invention provides a kind of multimedia file purification method, device, computer Storage medium and terminal device are read, is identified by the file type to multimedia file to be clean, according to multimedia The file type purification of file is by the multimedia file of steganography, so as to directly destroy the steganography carried in multimedia file letter Breath, effectively prevent information leakage, without the type for the steganographic algorithm for considering to use, and will not influence the normal of multimedia file It uses.

Detailed description of the invention

Fig. 1 is a kind of flow chart of a preferred embodiment of multimedia file purification method provided by the invention；

Fig. 2 is a kind of structural block diagram of a preferred embodiment of multimedia file purification device provided by the invention；

Fig. 3 is a kind of structural block diagram of a preferred embodiment of terminal device provided by the invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained all without creative efforts Other embodiments shall fall within the protection scope of the present invention.

Shown in Figure 1 the embodiment of the invention provides a kind of multimedia file purification method, Fig. 1 is offer of the present invention A kind of multimedia file purification method a preferred embodiment flow chart, the method includes the steps S11 to step S13:

Step S11, multimedia file to be clean is obtained；

Step S12, the file type of the multimedia file is identified；Wherein, the file type includes image File, document files and video file；

Step S13, purified treatment is carried out to the multimedia file according to the file type.

Specifically, obtain multimedia file to be clean first, file suffixes then according to multimedia file and more Corresponding identifier identification identifies the file type of multimedia file in binary system when media file storage, by more matchmakers Body file is divided into image file, document files and video file, thus according to the corresponding file type of multimedia file to more Media file carries out purified treatment and obtains purified multimedia file to destroy the steganography information carried in multimedia file, Different file types corresponds to different multimedia file purified treatment schemes, and purified multimedia file is not carry steganography Information, can normal use multimedia file.

It should be noted that image file includes picture file, psd file and 3dmax file etc., such as jpg, png, The image file of the formats such as bmp, gif；Document files includes Word document, Excel document, PowerPoint document and TXT text Shelves etc., such as the document files of the formats such as docx, xlsx, pptx, txt；Video file includes audio-video document etc., such as MP4, The video file of the formats such as avi, rmvb.

A kind of multimedia file purification method provided by the embodiment of the present invention, can be according to the files classes of multimedia file Type is purified by the multimedia file of steganography, directly destroys the steganography information carried in multimedia file, so as to effectively anti- Only information leakage, and the type without considering used steganographic algorithm when steganography, purified multimedia file will not shadow Ring the normal use of original multimedia file.

In a further advantageous embodiment, described according to the file type when the file type is image file Purified treatment is carried out to the multimedia file, is specifically included:

The corresponding identifier identification in binary system according to the file suffixes of described image file and described image file The picture format of described image file；Wherein, described image format include jpg format, png format, bmp format, gif format, Tga format, tif format, tiff format and hdr format；

Purified treatment is carried out to described image file according to described image format.

Specifically, in conjunction with above-described embodiment, when identifying multimedia file to be clean is image file, according to image When file suffixes and the image file storage of file in binary system corresponding identifier to the picture format of image file into Row identification obtains purified image file, correspondingly, different to carry out purified treatment to image file according to picture format Picture format correspond to different image file purified treatment schemes.

As an improvement of the above scheme, when described image format be jpg format when, it is described according to described image format to institute It states image file and carries out purified treatment, specifically include:

Obtain all Pixel Informations of described image file；

Filling is re-started according to the Pixel Information, generates purified image file.

Specifically, in conjunction with above-described embodiment, when the picture format for identifying image file to be clean is jpg format, It needs to draw to image file again, is first parsed the color pixel information reading in image file using programming language, To obtain all Pixel Informations of image file, filling is re-started to image file further according to the Pixel Information of acquisition, it will The rgb value of each pixel is filled on the corresponding position of image file, so that purified image file is generated, it is purified Image file has filtered out steganography information entrained by image file, only remains the Pixel Information of image file.

It should be noted that if image file be using cmyk color mode air brushing image, to image file into The corresponding color format conversion of row.

As an improvement of the above scheme, described according to the figure when described image format is png format or bmp format Picture format carries out purified treatment to described image file, specifically includes:

Random offset processing is carried out to the least significant bit of each pixel of described image file, obtains purified figure As file.

Specifically, in conjunction with above-described embodiment, when the picture format for identifying image file to be clean be png format or When bmp format, random offset processing is carried out to the least significant bit of each pixel of image file, to obtain purified Image file.

It should be noted that according to the hiding principle of the image file of png format or bmp format, in each pixel Least significant bit carries out data storage, therefore carries out random offset processing to least significant bit, can not influence image file Steganography information entrained by image file is destroyed on the basis of reading, guarantees that steganography information can not be extracted.

Image pixel is usually to be made of RGB three primary colors (RGB), each color occupies 8, and value range is 0x00~0xFF has 256 kinds of colors, contain the color of 256 3 powers, i.e. 16777216 kinds of colors altogether；And the mankind Eyes can distinguish about 10,000,000 kinds of different colors, this means that remaining color cannot be distinguished about in the eyes of the mankind 6777216 kinds.LSB steganography is exactly to modify the minimum binary digit i.e. least significant bit (LSB) of RGB color component, and people The eyes of class will not notice the variation before and after this, therefore the display of the image file before purified image file and purification is imitated Fruit is consistent, i.e., purified image file can be used normally.

As an improvement of the above scheme, when described image format be gif format when, it is described according to described image format to institute It states image file and carries out purified treatment, specifically include:

Each frame image of described image file is obtained, and is recorded between the acquisition sequence of each frame image and acquisition time Every；

Random offset processing is carried out to the least significant bit of each pixel of each frame image；

Treated each frame image is spliced again according to the acquisition sequence of record and acquisition time interval, generation Purified image file.

Specifically, in conjunction with above-described embodiment, when the picture format for identifying image file to be clean is gif format, When obtaining each frame image of image file first, and recording the acquisition of acquisition sequence and adjacent two field pictures of each frame image Between be spaced, then according to the purified treatment scheme of png format or the image file of bmp format to each picture of each frame image The least significant bit of element carries out random offset processing, finally according to the acquisition sequence of record and obtains treated each frame image Time interval is taken to carry out re-starting splicing, so that purified image file is generated, according to the every of former gif format image files The display effect one of purified image file and original image file that the sequence and time interval of one frame image are spliced into again It causes.

As an improvement of the above scheme, described according to the figure when described image format is png format or tga format Picture format carries out purified treatment to described image file, specifically includes:

The length information and width information of described image file are obtained according to the metadata of described image file；

Described image file is intercepted according to the length information and the width information, obtains purified image File.

Specifically, in conjunction with above-described embodiment, when the picture format for identifying image file to be clean be png format or When tga format, metadata when being stored according to image file in corresponding file header obtains the length information and width of image file Information is spent, image file is intercepted further according to the length information and width information, to obtain purified image file.

It should be noted that the information such as the length and width of image file are saved in metadata, by modifying data herein Achieve the purpose that hiding information, actually hiding information exist, do not show only.When extracting hiding information, it is only necessary to modify The original length and width of image file are returned, the part being hidden can be shown.According to first number of image file when purified treatment Image size is truncated in length and width in, only retains the part currently shown, and the part being hidden so just will be filtered It rejects, to achieve the purpose that purification.

As an improvement of the above scheme, when described image format is tif format, tiff format or hdr format, described Purified treatment is carried out to described image file according to described image format, is specifically included:

Obtain the color area information of described image file；

Filling is re-started according to the color area information, generates purified image file.

Specifically, in conjunction with above-described embodiment, when the picture format for identifying image file to be clean be tif format, When tiff format or hdr format, the color area information of image file is first obtained, re-starts and fills out further according to color area information It fills, to generate purified image file.

It should be understood that retaining color area information can guarantee that the display effect of image file is not in deviation, root When regenerating purified image file according to color area information, extra annotation etc. and image show unrelated information then by It filters out.

It is described according to the file type when the file type is document files in another preferred embodiment Purified treatment is carried out to the multimedia file, is specifically included:

Separating treatment is carried out to the writings and image in the document files；

It identifies the picture format for the image isolated, and the image isolated is carried out at purification according to described image format Reason, obtains purified image；

Combination is re-started according to the text and purified image isolated, obtains purified document files.

Specifically, in conjunction with above-described embodiment, when identifying multimedia file to be clean is document files, first by document Writings and image in file is separated, and the text isolated and the image isolated accordingly is obtained, for the figure isolated Picture equally identifies the picture format of image, to use different purified treatment sides according to different picture formats is corresponding Case (the purified treatment scheme for image file as described in above-described embodiment, which is not described herein again), after accordingly being purified Image, re-started after the completion of all image purifications isolated, then by the text isolated and purified image Combination, to obtain purified document files.

It should be noted that document can be quoted automatically when reconfiguring, it is only necessary to guarantee the file of each image Name and original being consistent can guarantee that purified file document has the same effect with the document files before purification；With For the document files of docx format, after decompressing in the way of zip compressed package, image is stored in word/media catalogue simultaneously It arranges in a certain order, compressed package suffix is reverted back into docx again after image purification, office software can be solved automatically Analysis, as long as guaranteeing that the information such as alternative document content and the constant i.e. certifiable typesetting of bibliographic structure will not change in compressed package Become, to not influence the normal use of document files, the document files of extended formatting is similarly.

It is described according to the file type when the file type is video file in another preferred embodiment Purified treatment is carried out to the multimedia file, is specifically included:

The data structure of the video file is detected；Wherein, the data structure of the video file is fixed number According to structure；

Retain the corresponding data of the fixed data structure according to testing result；

Purified video file is regenerated according to the corresponding data of the fixed data structure.

Specifically, in conjunction with above-described embodiment, when identifying multimedia file to be clean is video file, first to video The data structure of file is detected, since the data structure of normal video file is fixed, if in video file It is embedded in alternative document, can be detected, therefore only retains the corresponding data of fixed data structure, the data according to testing result As video file plays required data, regenerates purified video text further according to the corresponding data of fixed data structure Part.

It should be noted that the mode that hiding information is embedded in original video file is generally divided into two kinds, the first be by Hiding information is additional at the binary system end of video file, and player is opened after video file can be according to video structure by end It skips unrecognized part；Second is to hide hiding information according to image file in a certain frame picture of video file Mode is hidden.

For example, normal video file data is represented with A, for first way, shaped like AAAC, player normal play AAA content is only read, C portion content can skip, to achieve the purpose that hiding, when purification only need to isolate AAA according to structure The C portion content for being hidden in end can be filtered out；For the second way, can be regarded as being hidden in image frame shaped like AaA, a Hiding information, it is same when purification that only AA need to be isolated according to structure can filter out a partial content being hidden in image frame.

The embodiment of the invention also provides a kind of multimedia file purification devices, can be realized described in any of the above-described embodiment Multimedia file purification method all processes, the technical effect of effect and the realization of modules, unit in device It is corresponding identical as the technical effect of effect and the realization of multimedia file purification method described in above-described embodiment respectively, here It repeats no more.

It is shown in Figure 2, it is a kind of knot of a preferred embodiment of multimedia file purification device provided by the invention Structure block diagram, described device include:

File acquisition module 11, for obtaining multimedia file to be clean；

File type identification module 12 is identified for the file type to the multimedia file；Wherein, the text Part type includes image file, document files and video file；And

File tidying module 13, for carrying out purified treatment to the multimedia file according to the file type.

Preferably, when the file type is image file, the file tidying module 13 is specifically included:

Picture format recognition unit, for according to the file suffixes of described image file and described image file two into The picture format of corresponding identifier identification described image file in system；Wherein, described image format includes jpg format, png lattice Formula, bmp format, gif format, tga format, tif format, tiff format and hdr format；And

Image file clean unit, for carrying out purified treatment to described image file according to described image format.

Preferably, when described image format is jpg format, described image file tidying unit is specifically used for:

Obtain all Pixel Informations of described image file；

Filling is re-started according to the Pixel Information, generates purified image file.

Preferably, when described image format is png format or bmp format, described image file tidying unit is specifically used In:

Random offset processing is carried out to the least significant bit of each pixel of described image file, obtains purified figure As file.

Preferably, when described image format is gif format, described image file tidying unit is specifically used for:

Each frame image of described image file is obtained, and is recorded between the acquisition sequence of each frame image and acquisition time Every；

Random offset processing is carried out to the least significant bit of each pixel of each frame image；

Treated each frame image is spliced again according to the acquisition sequence of record and acquisition time interval, generation Purified image file.

Preferably, when described image format is png format or tga format, described image file tidying unit is specifically used In:

The length information and width information of described image file are obtained according to the metadata of described image file；

Described image file is intercepted according to the length information and the width information, obtains purified image File.

Preferably, when described image format is tif format, tiff format or hdr format, described image file tidying list Member is specifically used for:

Obtain the color area information of described image file；

Filling is re-started according to the color area information, generates purified image file.

Preferably, when the file type is document files, the file tidying module 13 is specifically included:

Character image separative unit, for carrying out separating treatment to the writings and image in the document files；

Document files clean unit, the picture format for the image isolated for identification, and according to described image format pair The image isolated carries out purified treatment, obtains purified image；And

Document files recomposition unit is obtained for re-starting combination according to the text and purified image isolated Purified document files.

Preferably, when the file type is video file, the file tidying module 13 is specifically included:

Video file detection unit is detected for the data structure to the video file；Wherein, the video text The data structure of part is fixed data structure；

Fixed data storage unit, for retaining the corresponding data of the fixed data structure according to testing result；And

Video file clean unit, for regenerating purified view according to the corresponding data of the fixed data structure Frequency file.

The embodiment of the invention also provides a kind of computer readable storage medium, the computer readable storage medium includes The computer program of storage；Wherein, where the computer program controls the computer readable storage medium at runtime Equipment executes multimedia file purification method described in any of the above-described embodiment.

It is shown in Figure 3 the embodiment of the invention also provides a kind of terminal device, it is that a kind of terminal provided by the invention is set The structural block diagram of a standby preferred embodiment, the terminal device include processor 10, memory 20 and are stored in described In memory 20 and it is configured as the computer program executed by the processor 10, the processor 10 is executing the calculating Multimedia file purification method described in any of the above-described embodiment is realized when machine program.

Preferably, the computer program can be divided into one or more module/units (such as computer program 1, meter Calculation machine program 2), one or more of module/units are stored in the memory 20, and by The processor 10 executes, to complete the present invention.One or more of module/units, which can be, can complete specific function Series of computation machine program instruction section, the instruction segment is for describing execution of the computer program in the terminal device Journey.

The processor 10 can be central processing unit (Central Processing Unit, CPU), can also be Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field- Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic, Discrete hardware components etc., general processor can be microprocessor or the processor 10 is also possible to any conventional place Device is managed, the processor 10 is the control centre of the terminal device, utilizes terminal device described in various interfaces and connection Various pieces.

The memory 20 mainly includes program storage area and data storage area, wherein program storage area can store operation Application program needed for system, at least one function etc., data storage area can store related data etc..In addition, the memory 20 can be high-speed random access memory, can also be nonvolatile memory, such as plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card and flash card (Flash Card) etc., or The memory 20 is also possible to other volatile solid-state parts.

It should be noted that above-mentioned terminal device may include, but it is not limited only to, processor, memory, those skilled in the art Member does not constitute the restriction to terminal device it is appreciated that Fig. 3 structural block diagram is only the example of above-mentioned terminal device, can be with Including perhaps combining certain components or different components than illustrating more or fewer components.

To sum up, a kind of multimedia file purification method, device, computer-readable storage medium provided by the embodiment of the present invention Matter and terminal device are identified by the file type to multimedia file to be clean, according to the text of multimedia file Part type is purified by the multimedia file of steganography, so as to directly destroy the steganography information carried in multimedia file, effectively Information leakage is prevented, without the type for the steganographic algorithm for considering to use, and will not influence the normal use of multimedia file.

The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations Also it should be regarded as protection scope of the present invention.