WO2016107010A1

WO2016107010A1 - Encryption/decryption method and apparatus, mobile terminal and computer storage medium

Info

Publication number: WO2016107010A1
Application number: PCT/CN2015/076495
Authority: WO
Inventors: 姜伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-30
Filing date: 2015-04-13
Publication date: 2016-07-07
Also published as: CN105809049B; CN105809049A

Abstract

Disclosed is an encryption method, comprising: acquiring a plurality of pictures of the same photographed object by means of a camera on a mobile terminal; selecting an identical feature point on each picture of the plurality of pictures, and acquiring first position information and feature information about the identical feature point on each picture; based on the first position information about the identical feature point on each picture, acquiring second position information about the identical feature point in a space; and according to the feature information and the acquired second position information about the identical feature point, performing encryption. Also disclosed are a decryption method, an encryption apparatus, a decryption apparatus, a mobile terminal and a computer storage medium related to encryption and decryption.

Description

Method and device for encrypting and decrypting, mobile terminal and computer storage medium

Technical field

The present invention relates to the field of mobile terminal camera applications, and in particular, to an encryption method, a decryption method, an encrypted device, a decrypted device, a mobile terminal, and a computer storage medium related to encryption and decryption.

Background technique

As a simulation of human eyes by Bionics, a planar dual camera related technique has been extensively studied. The widespread promotion of dual-camera positioning and dual-camera ranging will lead to the rapid development of a large number of practical applications among the people, thus rapidly advancing the intelligent evolution of related functions.

The application of the existing dual camera on the mobile terminal, due to the current research on only the camera, 3D camera and the improvement of the camera precision, the development and utilization of the dual camera positioning is still very small, in the user's use, currently only Can get higher camera quality from the same plane dual camera phone, as well as 3D camera, intuitive 3D multimedia experience, the dual camera features have yet to be further developed.

Summary of the invention

In view of this, the embodiment of the present invention is to provide a method for encrypting and decrypting, a device for encrypting and decrypting, a mobile terminal, and a computer storage medium related to encryption and decryption, which can solve the problem of how to implement the mobile terminal by using the function of the dual camera of the mobile terminal. Technical issues of encryption and decryption.

To achieve the above objective, an encryption method is provided by an embodiment of the present invention, where the method includes:

Acquiring multiple photos of the same subject through a camera on the mobile terminal;

Selecting the same feature points on each photo of the plurality of photos, and acquiring first location information and feature information of the same feature points on each photo;

Acquiring second location information in the space of the same feature point based on the first location information of the same feature point on each photo;

Encryption is performed based on the feature information of the same feature point and the acquired second location information.

Preferably, the selecting the same feature point on each photo of the plurality of photos, and acquiring the first location information and the feature information of the same feature point on each photo comprises:

Obtaining at least two identical feature points on each of the plurality of photos;

And acquiring first location information and feature information of the at least two identical feature points on each photo.

Preferably, the acquiring the second location information in the space of the same feature point based on the first location information of the same feature point on each photo includes:

Calculating second location information in the space of the same feature point according to the first location information, the focal length information of the camera, and the location information;

The second location information includes at least a spatial distance and/or a spatial angle between at least two feature points.

Preferably, the calculating the second location information in the space of the same feature point according to the first location information, the focal length information of the camera, and the location information, including:

Establishing an X-Y-Z three-dimensional coordinate axis in which the direction of the photo plane is the X and Y directions, and the other direction is the Z direction;

Calculating a Z coordinate value of each of the feature points according to an X coordinate value, a Y coordinate value, and a similar triangle principle of each of the plurality of photos to obtain an XYZ three-dimensional coordinate of each of the feature points Coordinate value

Calculating the at least two according to the coordinate values of the X-Y-Z three-dimensional coordinates of each of the feature points The spatial distance and/or spatial angle between feature points.

To achieve the above object, a method for decrypting provided by an embodiment of the present invention includes:

Capturing feature points on the photographic object that match the feature information in the encrypted information by the camera on the mobile terminal based on the pre-stored encrypted information;

Obtaining third location information of the feature point in the space;

Decryption is performed when it is determined that the third location information of the feature point matches the second location information stored in the encrypted information.

Preferably, after the acquiring the third location information of the feature point in the space, the method further includes:

After determining that the difference between the third location information of the feature point and the second location information stored in the encryption information exceeds a preset range, returning to performing execution based on the pre-stored encryption information, capturing the image by the camera on the mobile terminal A feature point that matches the feature information in the encrypted information.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores a computer program for performing the encryption method and/or the decryption method described above.

To achieve the above objective, an embodiment of the present invention provides an apparatus for encrypting, where the apparatus for encrypting includes:

a first acquiring unit configured to acquire a plurality of photos of the same photographic subject by using a camera on the mobile terminal;

a second acquiring unit, configured to select the same feature point on each photo of the plurality of photos, and obtain first location information and feature information of each of the same feature points on each photo;

a third acquiring unit, configured to acquire second location information in the space of the same feature point based on the first location information of the same feature point on each photo;

An encryption unit configured to perform the feature information according to the same feature point and the acquired The two location information is encrypted.

Preferably, the second obtaining unit is configured to:

Preferably, the third obtaining unit further includes:

a calculating unit, configured to calculate second location information according to the first location information, the focal length information of the camera stored in advance, and the location information of the camera;

To achieve the above objective, an embodiment of the present invention provides a device for decrypting, where the device includes:

a capture unit configured to capture, by the camera on the mobile terminal, a feature point on the photographic object that matches the feature information in the encrypted information, based on the pre-stored encrypted information;

An acquiring unit, configured to acquire third location information of the feature point in the space;

The decrypting unit is configured to perform decryption when determining that the third location information of the feature point matches the second location information stored in the encrypted information.

Preferably, the device further comprises:

a returning unit configured to: after determining that the difference between the third location information of the feature point and the second location information stored in the encryption information exceeds a preset range, returning to performing execution of the pre-stored encrypted information through the mobile terminal The camera captures feature points on the subject that match the feature information in the encrypted information.

To achieve the above objective, an embodiment of the present invention provides a mobile terminal, including a camera and a processor, where the camera is configured to acquire a plurality of photos of the same photographic subject; the processor is configured to acquire each of the plurality of photos The same feature points on a photo, and acquiring first position information and feature information of the same feature point on each photo; based on the same feature on each photo And acquiring the second location information in the space of the same feature point according to the first location information of the point; performing encryption according to the feature information of the same feature point and the acquired second location information.

In order to achieve the above object, an embodiment of the present invention provides a mobile terminal, including a camera and a processor, where the camera is configured to capture feature points on a photographic object that match feature information in the encrypted information based on pre-stored encrypted information; The processor is configured to acquire third location information of the feature point in space; and perform decryption when determining that the third location information of the feature point matches the second location information stored in the encryption information.

In the embodiment of the present invention, a plurality of photos of the same photographic subject are acquired by a camera on the mobile terminal; the same feature points on each photo of the plurality of photos are selected, and the first feature points of the same feature point are acquired on each photo. Location information and feature information; acquiring, according to the first location information of the same feature point on each photo, second location information in the space of the same feature point; and the feature information according to the same feature point, and The obtained second location information is encrypted, so that the user of the mobile terminal can directly encrypt or decrypt the mobile terminal by using the scene value information obtained by two or more cameras to experience a new and more interesting capability of the mobile terminal. Further opening up the advantages of two or more cameras of the mobile terminal to enhance the user experience.

DRAWINGS

1 is a schematic flow chart of an embodiment of a method for encrypting according to the present invention;

2 is a schematic diagram of a method for calculating second information of a feature point according to the present invention;

3 is a schematic flowchart of an embodiment of a method for decrypting according to the present invention;

4 is a schematic diagram of functional modules of an embodiment of an apparatus for encrypting according to the present invention;

FIG. 5 is a schematic diagram of functional modules of an apparatus for decrypting according to the present invention; FIG.

6 is a schematic diagram of functional modules of a first embodiment of a mobile terminal according to the present invention;

FIG. 7 is a schematic diagram of functional modules of a second embodiment of a mobile terminal according to the present invention.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The present invention provides a method of encryption.

Referring to FIG. 1, FIG. 1 is a schematic flowchart diagram of an embodiment of a method for encrypting according to the present invention.

In the first embodiment, the method of encrypting includes:

Step 101: Acquire a plurality of photos of the same photographic subject by using a camera on the mobile terminal;

The plurality of cameras may be two or more, and the following two examples are further described.

Specifically, two cameras are required to be supported on the mobile terminal, and the detailed focal length range and the relative position T information of the two cameras are stored.

When the user enters the encryption setting function through the mobile phone menu, the mobile phone activates the above two cameras to capture the scene captured by the current mobile phone, and displays the current real-time camera information on the mobile phone.

Step 102: Select the same feature point on each photo of the plurality of photos, and obtain first location information and feature information of the same feature point on each photo;

Specifically, the user selects feature points on the touch screen. The following describes the three feature points A, B, and C as examples. The first information includes at least position information of each feature point on a different picture, and the like.

For example, the position coordinates of A on the picture one taken by the camera are (A1, A2, A3);

The position coordinates of A on the picture 2 taken by the camera 2 are (A1', A2', A3');

The position coordinates of B on the picture one taken by the camera are (B1, B2, B3);

The position coordinates of B on the picture 2 taken by the camera 2 are (B1', B2', B3');

The position coordinates of C on the picture one taken by the camera are (C1, C2, C3);

The position coordinates of C on the picture 2 taken by the camera 2 are (C1', C2', C3').

At the same time, according to the photo information of the plurality of photos of the same scene and the pre-stored photo information and the first information corresponding to the first feature point, the feature points are pushed to the user;

Preferably, the photo information according to the plurality of photos of the same scene and the pre-stored photo information corresponding to the first information of the first feature point, the feature points are pushed to the user, including:

If the photo information is a large-area color patch and a dot of a large-area color patch that is different in color from the large-area color patch, push the dots of different colors, and/or;

If the photo information is a large area color patch, push an end point of the color block boundary in the large area color block to the user, and/or;

If the photo information is a plane with a special mark, push the center point of the mark to the user, and/or;

If the photo information is two line segments and an intersection of the two line segments, pushing the intersection to the user, and/or;

If the photo information is a small color patch, the center point of the small color patch is pushed to the user.

Specifically, when the user selects a feature point on the screen. For feature points recommended to users, priority is given to points that have the following characteristics:

A separate point of other color in a large color patch, such as a distinct black dot on a white handcuff;

An endpoint of a color block boundary, such as a blue square, a lower end corresponding to the right side, or an upper endpoint.

The center point of a special mark on a plane, such as the center of a phone mark, is taken as the center point of the mark.

The intersection of two line segments, such as the intersection of the boundaries formed by the stacking of two books.

The center point of a small color block, such as the center point of the computer monitor's power indicator.

Step 103: Acquire second location information in the space of the same feature point based on the first location information of the same feature point on each photo.

At the same time, the first location information is sent to the user;

Receiving, by the user, information confirming the first location information, calculating second location information according to the first location information, the focal length information of the plurality of cameras stored in advance, and the location information of the plurality of cameras .

Specifically, the user operation interface clarifies the specific location information of the specific feature point according to the location of the feature point selected by the user, and sends the specific location information to the user, and requests the user to confirm.

After the user confirms the feature point, the camera collects the first information of the current feature point and the parameter information of the camera itself, the parameter information includes focal length information of the plurality of cameras and position information of the plurality of cameras, and the A message and parameter information are sent to the "Central Processing Unit".

X coordinate values, Y coordinate values, and the like on the plurality of photos according to each feature point a principle of a triangle, calculating a Z coordinate value of each of the feature points, and obtaining coordinate values of the X-Y-Z three-dimensional coordinates of each of the feature points;

Calculating a spatial distance and/or a spatial angle between the at least two feature points according to coordinate values of the X-Y-Z three-dimensional coordinates of each of the feature points.

Specifically, the central processing unit of the mobile phone calculates the first points of the A, B, and C points by using the first information transmitted by the camera and the focal length information of the plurality of cameras and the position information of the plurality of cameras stored in advance. Relative position, record the distance between AB and AC, and record the angle information of ∠BAC. Dual camera ranging is to determine the relative position of the feature points in space relative to the two cameras by using the relative distance between the two cameras and the parallax of each independent imaging between the feature points and the focal length information of the camera.

Referring to FIG. 2, FIG. 2 is a schematic diagram of a method for calculating second information of a feature point according to the present invention.

The two cameras are in the same horizontal plane as shown below. At the same time, take pictures of the scenery P.

The sum is obtained on the two photographs taken, and the two points have a plane coordinate with respect to the center point of the photograph, the direction of the photo plane is the XY direction, and the direction of the focal length of the camera is the Z direction, as shown in Fig. 2 by using a similar triangle principle, The relative position of the cameras on the mobile terminal, knowing the relative position of the two points, f is the focal length of the camera. The vector direction of the sum corresponds exactly to and . In summary, the position of P point relative to the two cameras can be easily calculated.

Step 104: Perform encryption according to the feature information of the same feature point and the acquired second location information.

Specifically, the central processing unit of the mobile phone stores the obtained spatial distance and/or spatial angle between the first information of the feature points, the distance between AB, AC, and the angle of the BAC, in the mobile terminal.

When the user completes the encryption, the mobile phone is locked, and if the mobile phone is used, the mobile phone will pop up a decryption interface, which is the scene information transmitted by the camera. The user operates the mobile phone to align with the camera to transmit Scenery information coming.

Starting from the decryption interface pop-up, the central processing unit reads the first information of the feature points from the "storage processing unit", and the information about the relative position of each feature point AB, the distance between AC, the angle of ∠BAC, etc. Second, the central processing unit searches for feature points from the information collected by the camera.

After successfully obtaining three feature points on one frame of image, the relative position information between the feature points is calculated, and then compared with the feature point position information obtained at the time of encryption, if the matching error is within ±5% , the determination is successful.

There are some values that can be changed. Two cameras can be changed to three cameras, three feature points, which can be changed to two or more feature points, or feature line segments.

The present invention provides a method of decryption.

Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of an embodiment of a method for decrypting according to the present invention.

In the first embodiment, the method of decrypting includes:

Step 301: Capture, according to the pre-stored encryption information, a feature point on the photographic object that matches the feature information in the encrypted information by using a camera on the mobile terminal;

Specifically, when the user completes the encryption, the mobile phone is locked, and if the mobile phone is used, the mobile phone will pop up a decryption interface, that is, the scene information transmitted by the camera. The user operates the phone to align the photo Scenery information from the head.

From the start of the decryption interface pop-up, the central processing unit reads the information of the feature points from the "storage processing unit", the information of the relative position of each feature point, the distance between AC, the angle of the BAC, and other feature points. Between the spatial distance and the spatial angle, the central processing unit searches for the feature points from the information collected by the camera.

Step 302: Acquire third location information of the feature point in space.

Specifically, when three feature points are successfully acquired on one frame of image, the relative position information between the feature points is calculated.

Step 303: Perform decryption when determining that the third location information of the feature point matches the second location information stored in the encryption information.

Specifically, compared with the feature point position information obtained at the time of encryption, if the matching error is within ±5%, the matching is determined to be successful. The phone is successfully decrypted, and the user can enter the other menu of the mobile phone to use the mobile application. The difference of the second information of the feature points herein is not limited to ±5% in the preset range.

In the embodiment of the present invention, a plurality of photos of the same photographic subject are acquired by a camera on the mobile terminal; the same feature points on each photo of the plurality of photos are selected, and the first feature points of the same feature point are acquired on each photo. Location information and feature information; acquiring, according to the first location information of the same feature point on each photo, second location information in the space of the same feature point; and the feature information according to the same feature point, and The acquired second location information is encrypted, so that the user of the mobile terminal can directly obtain the scene numerical value information obtained by two or more cameras. To realize the encryption or decryption of the mobile terminal to experience the new ability of the more interesting mobile terminal, further open the advantages of two or more cameras of the mobile terminal, and improve the user experience.

The present invention provides an apparatus for encryption.

Referring to FIG. 4, FIG. 4 is a schematic diagram of functional modules of an embodiment of an apparatus for encrypting according to the present invention.

In a first embodiment, the encrypted device comprises:

The first obtaining unit 401 is configured to acquire a plurality of photos of the same photographic subject by using a camera on the mobile terminal;

The second acquiring unit 402 is configured to select the same feature point on each photo of the plurality of photos, and obtain first location information and feature information of each of the same feature points on each photo;

Preferably, the second obtaining unit 402 is configured to:

The third obtaining unit 403 is configured to acquire, according to the first location information of the same feature point on each photo, second location information in the space of the same feature point;

Preferably, the third obtaining unit 403 further includes:

Specifically, the first information transmitted by the central processing unit of the mobile phone through the camera, and the focal length information of the plurality of cameras stored in advance and the position information of the plurality of cameras are counted Calculate the relative positions of the three points A, B, and C, record the distance between AB and AC, and record the angle information of the BAC. Dual camera ranging is to determine the relative position of the feature points in space relative to the two cameras by using the relative distance between the two cameras and the parallax of each independent imaging between the feature points and the focal length information of the camera.

The encryption unit 404 is configured to perform encryption according to the feature information of the same feature point and the acquired second location information.

When the user completes the encryption, the mobile phone is locked, and if the mobile phone is used, the mobile phone will pop up a decryption interface, which is the scene information transmitted by the camera. The user operates the mobile phone to align with the scene information transmitted by the camera.

When three feature points are successfully acquired on one frame of image, the phase between the feature points is calculated. The position information is then compared with the feature point position information obtained at the time of encryption, and if the matching error is within ±5%, the matching is determined to be successful.

In an actual application, the first obtaining unit 401, the second obtaining unit 402, the third obtaining unit 403, and the encrypting unit 404 may all be processed by a central processing unit (CPU) in a terminal to which the encrypted device belongs, and digital signal processing. (DSP, Digital Signal Processor) or Field Programmable Gate Array (FPGA) implementation.

The present invention provides a device for decryption.

Referring to FIG. 5, FIG. 5 is a schematic diagram of functional modules of an apparatus for decrypting according to the present invention.

In the first embodiment, the decrypted device includes:

The capturing unit 501 is configured to capture a feature point on the photographic object that matches the feature information in the encrypted information by using a camera on the mobile terminal based on the pre-stored encryption information;

Specifically, when the user completes the encryption, the mobile phone is locked, and if the mobile phone is used, the mobile phone will pop up a decryption interface, that is, the scene information transmitted by the camera. The user operates the mobile phone to align with the scene information transmitted by the camera.

Starting from the decryption interface pop-up, the central processing unit reads from the "storage processing unit" The information of the feature points, the information of the relative position of each feature point, the distance between AC, the distance between the feature points such as the angle of ∠BAC, the spatial angle, and the information collected by the central processing unit from the camera. Go to search for feature points.

Specifically, if three feature points cannot be found successfully on the same image, after 10 seconds, the search is exited, and the user is prompted, "the decryption target is not found", and the decryption fails.

If you find a lot of points that match the stored feature points, you can't determine which ones are the feature points that need to be locked. When you still can't confirm after 10s, you can exit the search and prompt the user, "The decryption target is not found", and the decryption fails.

The obtaining unit 502 is configured to acquire third location information of the feature point in the space;

The decryption unit 503 is configured to perform decryption when it is determined that the third location information of the feature point matches the second location information stored in the encrypted information.

Preferably, the device further comprises:

If three feature points are successfully found, after calculation, the difference between the stored feature values and the stored feature value is greater than ±5%, and then try to search once again.

Specifically, if the gap is still large, continue to try to determine whether the return search exceeds the pre- The number of times set first, if it is, until 10s clocks out, prompting the user "no decryption target found", the decryption failed.

In the prior art, the current key access control and fingerprint identification access control are different, and the decryption takes more time and is difficult.

The following is an example of applying dual camera encryption and decryption to the camera access control system.

Encryption phase:

1. The access control system uses its own dual camera to open the password setting phase;

2. The user takes out a set of chess and sets up a chess game 1;

3. The user determines the position of the corner of the board in the operation interface, and determines the characteristic pieces, which can be all the pieces in the picture. In this case, the software will automatically display all the pieces for the user to confirm;

4. The dual camera collects data, which is calculated by the central processor and the position of the feature piece relative to the board. The central processor stores the information calculated by this picture into the "storage processing unit";

5. The user makes a certain shift after one or a few pieces of the current game, and forms a new game 2;

6. The user determines the feature pieces in the new picture in the user operation interface;

7. The dual camera collects data, which is calculated by the central processor, and the position of the second characteristic piece relative to the chessboard. The central processor also stores the information calculated by this picture into the "storage processing unit";

8. At this point, encrypted information is formed;

Decryption phase:

9. The user actively opens the decryption process of the access control;

10, the user takes out the chessboard and puts out the preset chess game 1;

11. The camera continuously monitors and transmits data to the central processor. Once the game is found to match, a prompt is issued to prompt the user that the game 1 has passed the verification;

12. The user moves the chess piece on the board and puts out the game 2;

13. The camera continues to monitor and pass data to the central processor. Once the game 2 is found to match, the decryption is successful.

In practical applications, the capturing unit 501, the obtaining unit 502, and the decrypting unit 503 can all be implemented by a CPU, DSP or FPGA in the terminal to which the decrypted device belongs.

The invention provides a mobile terminal.

Referring to FIG. 6, FIG. 6 is a schematic diagram of functional modules of a first embodiment of a mobile terminal according to the present invention.

The mobile terminal includes a camera 601 configured to acquire a plurality of photos of the same photographic subject, and a processor 602 configured to acquire the same feature points on each of the plurality of photos, and Obtaining first location information and feature information on each photo of the same feature point; acquiring second of the same feature point in space based on the first location information of the same feature point on each photo Location information; encrypting according to the feature information of the same feature point and the acquired second location information.

Referring to FIG. 7, FIG. 7 is a schematic diagram of functional modules of a second embodiment of a mobile terminal according to the present invention.

The mobile terminal includes a camera 701 and a processor 702, and the camera is configured to capture feature points on the photographic object that match the feature information in the encrypted information based on the pre-stored encrypted information; the processor is configured to acquire the feature Point the third position information in space; in the determination The third location information of the feature point is decrypted when it matches the second location information stored in the encrypted information.

One of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments may be completed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, and the program is executed. When it includes the following steps:

Encryption is performed according to the feature information of the same feature point, and the acquired second location information, such as a ROM/RAM, a magnetic disk, an optical disk, or the like.

Obtaining third location information of the feature point in the space;

Decryption is performed when it is determined that the third location information of the feature point matches the second location information stored in the encrypted information, such as a ROM/RAM, a magnetic disk, an optical disk, or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Industrial applicability

In the embodiment of the present invention, a plurality of photos of the same photographic subject are acquired by a camera on the mobile terminal; the same feature points on each photo of the plurality of photos are selected, and the same feature points are acquired on each photo. First location information and feature information; acquiring, according to the first location information of the same feature point on each photo, second location information in the space of the same feature point; and the feature information according to the same feature point And obtaining the second location information for encryption, so that the user of the mobile terminal can directly encrypt or decrypt the mobile terminal by using the scene value information obtained by the two or more cameras to experience the more interesting mobile terminal. The new capability further expands the advantages of two or more cameras of mobile terminals to enhance the user experience.

Claims

An encryption method, the method comprising:

Acquiring multiple photos of the same subject through a camera on the mobile terminal;

Selecting the same feature points on each photo of the plurality of photos, and acquiring first location information and feature information of the same feature points on each photo;

Acquiring second location information in the space of the same feature point based on the first location information of the same feature point on each photo;

Encryption is performed based on the feature information of the same feature point and the acquired second location information.
The method according to claim 1, wherein said selecting the same feature point on each photo of said plurality of photos, and acquiring first position information and feature information of said same feature point on each photo comprises :

Obtaining at least two identical feature points on each of the plurality of photos;

And acquiring first location information and feature information of the at least two identical feature points on each photo.
The method of claim 2, wherein the acquiring the second location information in the space of the same feature point based on the first location information of the same feature point on each photo comprises:

Calculating second location information in the space of the same feature point according to the first location information, the focal length information of the camera, and the location information;

The second location information includes at least a spatial distance and/or a spatial angle between at least two feature points.
The method according to claim 3, wherein the calculating the second location information in the space of the same feature point according to the first location information, the focal length information of the camera, and the location information comprises:

Establishing an X-Y-Z three-dimensional coordinate axis in which the direction of the photo plane is the X and Y directions, and the other direction is the Z direction;

Calculating a Z coordinate value of each of the feature points according to an X coordinate value, a Y coordinate value, and a similar triangle principle of each of the plurality of photos to obtain an XYZ three-dimensional coordinate of each of the feature points Coordinate value

Calculating a spatial distance and/or a spatial angle between the at least two feature points according to coordinate values of the X-Y-Z three-dimensional coordinates of each of the feature points.
A decryption method, the method comprising:

Capturing feature points on the photographic object that match the feature information in the encrypted information by the camera on the mobile terminal based on the pre-stored encrypted information;

Obtaining third location information of the feature point in the space;

Decryption is performed when it is determined that the third location information of the feature point matches the second location information stored in the encrypted information.
The method of claim 5, wherein the obtaining the third location information of the feature point in the space further comprises:

After determining that the difference between the third location information of the feature point and the second location information stored in the encryption information exceeds a preset range, returning to performing execution based on the pre-stored encryption information, capturing the image by the camera on the mobile terminal A feature point that matches the feature information in the encrypted information.
An encryption device, the encryption device comprising:

a first acquiring unit configured to acquire a plurality of photos of the same photographic subject by using a camera on the mobile terminal;

a second acquiring unit, configured to select the same feature point on each photo of the plurality of photos, and obtain first location information and feature information of each of the same feature points on each photo;

a third obtaining unit configured to be based on the first location of the same feature point on each photo Information, acquiring second location information in the space of the same feature point;

The encryption unit is configured to perform encryption according to the feature information of the same feature point and the acquired second location information.
The encryption device according to claim 7, wherein the second obtaining unit is configured to:

Obtaining at least two identical feature points on each of the plurality of photos;

And acquiring first location information and feature information of the at least two identical feature points on each photo.
The encryption device of claim 8, wherein the third obtaining unit further comprises:

a calculating unit, configured to calculate second location information according to the first location information, the focal length information of the camera stored in advance, and the location information of the camera;

The second location information includes at least a spatial distance and/or a spatial angle between at least two feature points.
A decryption device, the decryption device comprising:

a capture unit configured to capture, by the camera on the mobile terminal, a feature point on the photographic object that matches the feature information in the encrypted information, based on the pre-stored encrypted information;

An acquiring unit, configured to acquire third location information of the feature point in the space;

The decrypting unit is configured to perform decryption when determining that the third location information of the feature point matches the second location information stored in the encrypted information.
The decrypting apparatus according to claim 10, wherein said decrypting means further comprises:

a returning unit configured to: after determining that the difference between the third location information of the feature point and the second location information stored in the encryption information exceeds a preset range, returning to performing execution of the pre-stored encrypted information through the mobile terminal The camera captures feature points on the subject that match the feature information in the encrypted information.
A mobile terminal includes a camera and a processor, the camera Configuring to acquire a plurality of photos of the same photographic subject; the processor configured to acquire the same feature points on each of the plurality of photos, and obtain a first location on each photo of the same feature points Information and feature information; acquiring, according to the first location information of the same feature point on each photo, second location information in the space of the same feature point; obtaining the feature information according to the same feature point, and acquiring The second location information is encrypted.
A mobile terminal, comprising: a camera and a processor, the camera configured to capture feature points on the photographic object that match the feature information in the encrypted information based on the pre-stored encrypted information; the processor is configured to acquire The third location information of the feature point in the space; when the third location information of the feature point is determined to match the second location information stored in the encrypted information, decryption is performed.
A computer storage medium having stored therein computer executable instructions for performing the encryption method of any one of claims 1 to 4.
A computer storage medium having stored therein computer executable instructions for performing the decryption method of any one of claims 5 and 6.