KR100712162B1 - Encryption device having an image encryption function with searching of the image and encryption and searching method of the encryption image - Google Patents

Encryption device having an image encryption function with searching of the image and encryption and searching method of the encryption image Download PDF

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KR100712162B1
KR100712162B1 KR1020050079161A KR20050079161A KR100712162B1 KR 100712162 B1 KR100712162 B1 KR 100712162B1 KR 1020050079161 A KR1020050079161 A KR 1020050079161A KR 20050079161 A KR20050079161 A KR 20050079161A KR 100712162 B1 KR100712162 B1 KR 100712162B1
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South Korea
Prior art keywords
image data
encrypted
unit
labeling
labeling information
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KR1020050079161A
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Korean (ko)
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KR20070026930A (en
Inventor
김항곤
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(주)하이디어 솔루션즈
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • H04N21/2351Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving encryption of additional data
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/50Information retrieval; Database structures therefor; File system structures therefor of still image data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/88Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving rearrangement of data among different coding units, e.g. shuffling, interleaving, scrambling or permutation of pixel data or permutation of transform coefficient data among different blocks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25866Management of end-user data
    • H04N21/25875Management of end-user data involving end-user authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/262Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265Mixing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/30Transforming light or analogous information into electric information

Abstract

A specific signal is extracted from the image data, and labeling information for the extracted signal is generated. When the encrypted image data is retrieved by combining the encrypted image data with the encrypted image data, the retrieval of the video data, which can decrypt and search only the labeling information, A cryptographic device capable of encrypting it, and an encryption method and a retrieval method thereof are posted. The encrypting apparatus includes a data encrypting unit for encrypting the image data transmitted from the image data generating unit for converting the optical signal of the subject input from the optical system into an electric signal through the image pickup device to generate image data, A labeling unit for generating labeling information for the frame when the rate of change of the pixel value calculated by the pixel calculation unit is equal to or greater than a predetermined value; And a data combining unit for combining the encrypted image data transmitted from the data encrypting unit and the encrypted labeling information transmitted from the labeling encrypting unit.
Image, video, encryption, search, security

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encryption apparatus for encrypting video data and a method for encrypting video data,

FIG. 1 is a block diagram illustrating a configuration of an encryption apparatus that enables retrieval of a video object according to an embodiment of the present invention.

2 is a block diagram showing a configuration of a pixel calculation unit among the encryption apparatuses shown in FIG.

3 is a flowchart for explaining an encryption method using the encryption apparatus shown in Fig.

FIG. 4 is a flowchart for explaining a method of searching for a video image encrypted by the encryption apparatus shown in FIG.

FIG. 5 is a block diagram illustrating a configuration of an encryption apparatus that enables retrieval of a video object according to another embodiment of the present invention.

6 is a flowchart for explaining an encryption method using the encryption apparatus shown in FIG.

Description of the Related Art

100, 200: encryption device 105, 205: image data generation unit

110, 210: optical system 115, 215:

120, 220: Data encryption unit 125: Pixel calculation unit

130, 230: a labeling generation unit 135, 235: a labeling encryption unit

140, 240: Data synthesizer 145: Vector generator

150: vector storage unit 155: vector operation unit

225: Pixel detection unit 245: Image compression unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encryption apparatus for encrypting a video image so as to enable the retrieval of video images, an encryption method therefor, and a retrieval method for encrypted video images. More particularly, And generates labeling information such as a frame number, location, and time of the extracted video signal, encrypts the extracted video signal, and combines it with the encrypted video data. When the encrypted video data is searched, only the labeling information is decoded The present invention relates to an encryption apparatus for encrypting a video object so that the video object can be retrieved, a method for encrypting the encrypted video object, and a method for retrieving an encrypted video object.

In the case of digital data, since the processing and management of data is easy, the use of digital image is increasing in the fields related to video and broadcasting. As the video data is digitalized in this manner, a request for retrieving the stored video data becomes necessary. For this reason, various search methods of video images have been conventionally proposed so that a large amount of video data can be searched. However, while digital data is easy to process and manage, it has security problems that it is easy to copy, modify and hack data. Accordingly, in the case of video objects requiring security, the image data is encrypted and stored or transmitted.

However, in order to secure the video data, when the video data is encrypted and stored or transmitted, the encrypted video data must be decrypted and then retrieved. In this case, since the video data generally has a large capacity, the search time is long.

Accordingly, it is an object of the present invention to provide a method and an apparatus for efficiently encrypting and authenticating image data during storage and transmission of image data by encrypting digital image data at the same time by using an encryption device, To an encryption apparatus for encrypting a video object so as to be able to search for a video object capable of preventing hacking, an encryption method therefor, and a retrieval method of encrypted video objects.

Another object of the present invention is to provide a method and apparatus for encrypting image data in order to secure digital image data, extracting a video signal of a corresponding part when a certain change occurs in the video data during encryption, Location, time, and the like, separately encrypts them, and combines them with the encrypted image data to generate final encrypted image data. When the encrypted image data is searched, only the labeling information is decrypted and searched, To an encryption apparatus for encrypting a video so as to enable retrieval of a video object enabling quick retrieval of data, an encryption method therefor, and a retrieval method of an encrypted video object.

According to another aspect of the present invention, there is provided an encrypting apparatus for encrypting an optical signal of an object, which is input from an optical system, into an electrical signal through an image capturing element to generate image data, A pixel calculation unit for calculating a rate of change of the pixel values of the previous and next frames of the image data, and a pixel value calculation unit for calculating, for each pixel, A labeling encryption unit for encrypting the labeling information generated by the labeling generation unit, and an encryption unit for encrypting the encrypted image data transmitted from the data encryption unit and the encrypted labeling information transmitted from the labeling encryption unit, A search for a video object including a data combining unit An encryption device for encrypting neunghage is provided.

In this case, the pixel calculation unit may include a vector generation unit for converting the pixel change amount of the pixel into a vector value in each frame of the image data, a vector storage unit for temporarily storing the vector value, As shown in FIG.

According to another aspect of the present invention, there is provided an encryption apparatus including an image data generation unit for generating an image data by converting an optical signal of an object input from an optical system into an electrical signal through an image pickup element, A data encryption unit for encrypting the compressed image data transmitted from the image compression unit, a pixel detecting unit for detecting a rate of change of the pixel values of the frame before and after the image data calculated by the image compression unit, A labeling unit for generating labeling information for a frame when the rate of change of the pixel value detected by the pixel detection unit is equal to or greater than a predetermined value, a labeling encryption unit for encrypting the labeling information generated by the labeling unit, And the encrypted image data transmitted from the < RTI ID = 0.0 > There is provided an encrypting apparatus for encrypting a video object so as to enable retrieval of a video object including a data composing unit for combining the encrypted labeling information transmitted from the ring encrypting unit.

According to a preferred embodiment of the encryption method of the present invention, there is provided a method for encrypting an optical signal of an object, which is input from an optical system, into an electric signal through an imaging device to generate image data, Generating encrypted image data by encrypting the data, calculating a rate of change of pixel values of the frame before and after the image data, generating labeling information for the frame when the rate of change of the pixel value is equal to or greater than a predetermined value Encrypting the labeling information to generate encrypted labeling information, and generating encrypted labeling image data by combining the encrypted image data and the encrypted labeling information, Method is provided.

According to another aspect of the present invention, there is provided an encryption method for encrypting an optical signal of an object input from an optical system into an electrical signal through an imaging device to generate image data, A step of compressing the data to generate compressed image data, a step of encrypting the compressed image data to generate encrypted image data, a step of detecting a rate of change of the pixel values of the frame before and after the image data calculated in the compressing step of the image data Generating labeling information for a frame when the rate of change of the detected pixel value is equal to or greater than a predetermined value; generating encrypted labeling information by encrypting the labeling information; The labeling information is combined to generate encrypted labeling image data A method for the search of the video object comprises the step of St. possibly encrypted, is provided.

Preferably, the labeling information includes a frame number of image data, a photographing time of the frame, position information of the detected pixels, and a camera unique number.

According to another aspect of the present invention, there is provided a method of searching for a moving picture, comprising: receiving authentication information from a user to authenticate the user; receiving a search key from the authenticated user; A step of separately calling the encrypted labeling information from the encrypted labeling image data combined with the encrypted image data and the encrypted labeling information, decoding the called labeling information, retrieving the labeling information corresponding to the search key A step of calling the encrypted image data corresponding to the retrieved labeling information, a step of decrypting the called image data, and a step of outputting the decrypted image data.

Preferably, decompressing the decoded image data may further include decompressing the decoded image data. Further, the search key includes a frame number of image data, a photographing time of a frame, position information of image data pixels, or a camera unique number.

According to the encrypting apparatus for encrypting the video data according to the present invention, and the encrypting method and the encrypted video data retrieving method, by encrypting and simultaneously generating digital video data using the encrypting apparatus, The image data can be effectively authenticated, the integrity of the data can be ensured, and hacking can be prevented in the process of transmitting the data. In addition, in order to secure the digital image data, the image data is encrypted. When a specific change occurs in the image data during the encryption process, the image signal of the corresponding part is extracted and the frame number, location, time The labeling information of the encrypted image data is separately generated and combined with the encrypted image data to generate final encrypted image data. Thus, when the encrypted image data is searched, only the labeling information can be decrypted and searched, . ≪ / RTI >

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a description will be made in detail of an encrypting apparatus for encrypting video data according to preferred embodiments of the present invention, a method for encrypting the encrypted video data and a method for searching encrypted video data. The present invention is not limited thereto.

Example 1

FIG. 1 is a block diagram showing a configuration of an encrypting apparatus that enables retrieval of a video object according to a first embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a pixel calculating unit, FIG.

1 and 2, the encryption apparatus 100 includes a data encryption unit 120, a pixel calculation unit 125, a labeling generation unit 130, a labeling encryption unit 135, and a data synthesis unit 140, The vector calculation unit 125 includes a vector generation unit 145, a vector storage unit 150, and a vector calculation unit 155.

A conventional digital imaging apparatus receives light through an optical system 110 and an image pickup element 115 such as a CCD (Charge Coupled Devices) or a CMOS (Complementary Metal Oxide Semiconductor) receives the light and converts the light into an analog electric signal The analog signal is converted into a digital signal. In this way, the image data is transmitted to the encrypting apparatus 100 in order to encrypt the image data generated from the image data generating unit 105 composed of the optical system 110 and the image capturing element 115. The image data is transmitted to the data encryption unit 120 of the encryption apparatus 100 to encrypt the image data itself.

At this time, the image data transmitted to the data encryption unit 120 calculates the rate of change of each pixel value of the previous and next frames through the pixel calculation unit 125. That is, the vector generation unit 145 generates a vector value of a pixel for each pixel on one frame, temporarily stores the vector value in the vector storage unit 150, and then, for each pixel on the next frame of the frame The vector value of the pixel is regenerated and stored in the vector storage unit 150. The vector operation unit 155 calculates the difference between the vector values of the two frames stored in the vector storage unit 150 for each pixel.

If the absolute value calculated by the vector operation unit 155 is equal to or greater than a preset reference value, the labeling unit 130 generates labeling information for the corresponding frame. At this time, the labeling information includes position information of a pixel having a difference between the frame number of the frame, the time at which the frame was captured, the unique number of the photographing apparatus (camera) .

The labeling information generated in the labeling generation unit 130 is encrypted in the labeling encryption unit 135 and combined in the data synthesis unit 140 with the image data encrypted in the data encryption unit 120. Then, the labeling image data in which the encrypted labeling information and the encrypted image data are combined is stored in a recording apparatus or transmitted to the outside.

Hereinafter, an encryption method for encrypting a video object according to the first embodiment is described.

FIG. 3 shows a flowchart for explaining an encryption method using the encryption apparatus shown in FIG.

1 to 3, an optical signal of an object input from an optical system 105 is converted into an electric signal through an image pickup element 115 to generate image data (S110). The image data is generated as image data encrypted by the data encryption unit 120 (S120). At this time, encryption algorithms such as SEED (Domestic Standard Block Encryption Algorithm), DES (Data Encryption Standard), IDEA, RC2, and RC5 may be used for encrypting the image data. In addition, the image data generated by the image data generation unit 105 is calculated by the pixel calculation unit 125 in accordance with the progress of the frame (S130). This is the same as the method of predicting the motion of an image for compressing image data. The method of generating a pixel change of each pixel constituting one frame as a vector value and changing the pixel of each pixel constituting the next frame of the frame, , And calculates the difference between the two vector values for each pixel. At this time, the absolute value of the difference between the two vector values is compared with the reference value preset by the user (S140). If the absolute value is larger than the reference value as a result of the comparison, the label generation unit 130 performs labeling Information is generated (S150). Subsequently, the labeling information is encrypted by the labeling encryption unit 135 to generate encrypted labeling information (S160). In this case, encryption algorithms such as SEED, DES, IDEA, RC2, and RC5 may be used to encrypt the labeling information. Subsequently, the encrypted image data and the encrypted labeling information are generated as labeling image data encrypted by the data combining unit 140 (S170).

Hereinafter, a method of searching for a video image encrypted by the encryption apparatus according to the first embodiment will be described.

FIG. 4 is a flowchart illustrating a method of searching for a video image encrypted by the encryption apparatus shown in FIG. 1. FIG.

Referring to FIG. 4, in order to search for a specific section in which labeling information is recorded among image data stored in or transmitted from a recording apparatus, the user inputs authentication information (S501). A search system (not shown) receiving the authentication information authenticates whether the user is an authorized user using the authentication information. When the authentication information is valid, a search system If the authentication information is not valid, the user is requested to request authentication information again (S502). If the user is authenticated as an authorized user, a search key for searching a predetermined section of the image data is input from the user (S503). At this time, the search key includes a frame number of a frame constituting the image data, a time at which the image data was photographed, a unique number of the photographing apparatus (camera) for generating the image data, or position information of a specific position . If the search key is input, encrypted labeling information is separately called from the encrypted labeling image data (S504), and the encrypted labeling information is decrypted (S505). In this case, decryption algorithms corresponding to encryption algorithms such as SEED, DES, IDEA, RC2, and RC5 described above are used. Subsequently, it is determined whether there is a value corresponding to the search key in the decoded labeling information (S506). If there is no corresponding search result, a different search key is input to the user. If there is a corresponding search result And waits for the call of the encrypted image data (S507). That is, if the information corresponding to the search key input by the user is present in the decoded labeling information, the recording device calls a predetermined section of the encrypted image data corresponding to the retrieved decoded labeling information (S508). And decrypts the encrypted image data to output the called image data (S509). Also in this case, a decryption algorithm corresponding to the above-described encryption algorithm such as SEED, DES, IDEA, RC2, and RC5 is used. Subsequently, the decoded image data is outputted to the user through an output device (not shown) (S510).

Example 2

FIG. 5 is a block diagram showing a configuration of an encryption apparatus that enables retrieval of a video object according to a second embodiment of the present invention.

5, the encrypting apparatus 200 includes a data encrypting unit 220, a pixel detecting unit 225, a labeling generating unit 230, a labeling encrypting unit 235, and a data synthesizing unit 240.

A conventional digital imaging apparatus receives light through an optical system 210 and an image pickup element 215 such as a CCD (Charge Coupled Devices) or a CMOS (Complementary Metal Oxide Semiconductor) receives the light and converts the light into an analog electric signal The analog signal is converted into a digital signal. In this way, image data is generated from the image data generation section 205 composed of the optical system 210 and the image pickup element 215, and the image data is compressed through the image compression section 245 for effective storage and transmission of data do. At this time, the image data including luminance and chrominance signals of the subject are converted into a data stream using a standard compression method such as MPEG-1, MPEG-2, MPEG-3 and MPEG-4 through data encoding. The image data compressed through the image compressing section 245 is transferred to the encrypting apparatus 200 in order to encrypt the image data. The image data is transmitted to the data encryption unit 220 of the encryption apparatus 200 to encrypt the image data itself.

At this time, the image data transmitted to the data encryption unit 220 is detected by the pixel detection unit 225 and the rate of change of each pixel value of the previous and next frames. That is, in order to compress the image data in the image compression unit 245, a vector value of a pixel for each pixel on one frame is generated, and a vector value of a pixel for each pixel on the next frame of the frame is generated again, The difference between the vector values is detected in the process of calculating the difference between the vector values of the frames for each pixel.

At this time, if the absolute value of the vector calculation value detected by the pixel detection unit 225 is equal to or larger than a preset reference value, the labeling generation unit 230 generates labeling information for the corresponding frame. At this time, the labeling information includes position information of a pixel having a difference between the frame number of the frame, the time at which the frame was captured, the unique number of the photographing apparatus (camera) .

The labeling information generated in the labeling generation unit 230 is encrypted in the labeling encryption unit 235 and combined in the data synthesis unit 240 with the image data encrypted in the data encryption unit 220. Then, the labeling image data in which the encrypted labeling information and the encrypted image data are combined is stored in a recording apparatus or transmitted to the outside.

Hereinafter, a description will be given of an encryption method for encrypting a video object in accordance with the second embodiment.

FIG. 6 shows a flowchart for explaining an encryption method using the encryption apparatus shown in FIG.

5 and 6, an optical signal of an object input from an optical system 205 is converted into an electric signal through an image pickup element 215 to generate image data (S210). The image data is compressed through the image compression unit 245 (S220). At this time, the image data including luminance and chrominance signals of the subject are converted into a data stream using a standard compression method such as MPEG-1, MPEG-2, MPEG-3 and MPEG-4 through data encoding. The compressed image data is generated as image data encrypted by the data encryption unit 220 (S230). At this time, encryption algorithms such as SEED (Domestic Standard Block Encryption Algorithm), DES (Data Encryption Standard), IDEA, RC2, and RC5 may be used for encrypting the image data. The image data compressed through the image compressing unit 245 is detected by the pixel detecting unit 225 in accordance with the progress of the frame (S240). In order to compress image data, a pixel change of each pixel constituting one frame is generated as a vector value, a pixel change of each pixel constituting a next frame of the frame is also generated as a vector value, And the absolute value of the difference between the two vector values is detected while calculating the difference between the values. At this time, the absolute value of the difference between the two vector values is compared with the reference value preset by the user (S250). If the absolute value is larger than the reference value as a result of the comparison, the label generation unit 230 performs labeling Information is generated (S260). Subsequently, the labeling information is encrypted by the labeling encryption unit 235 to generate encrypted labeling information (S270). In this case, encryption algorithms such as SEED, DES, IDEA, RC2, and RC5 may be used to encrypt the labeling information. Subsequently, the encrypted image data and the encrypted labeling information are generated as labeling image data encrypted by the data combining unit 240 (S280).

Hereinafter, a method of searching for a video image encrypted by the encryption apparatus according to the second embodiment will be described.

The encrypted video image retrieval method according to the present embodiment is a method for retrieving the encrypted video image data according to the retrieval key input by the user for outputting the image data that has been compressed by the image compressing unit 245 and encrypted and stored or transmitted Decompression of the compressed image data is the same as the case of the first embodiment described above, and a description thereof will be omitted.

As described above, according to the encrypting apparatus for encrypting the video data according to the present invention, the encrypting method for encrypting the video data, and the encrypted video data retrieving method, by encrypting the digital video data at the same time as using the encryption apparatus, It is possible to effectively authenticate the image data in the process of storing and transmitting, ensure the integrity of the data, and prevent hacking in the process of transmitting the data. In addition, in order to secure the digital image data, the image data is encrypted. When a specific change occurs in the image data during the encryption process, the image signal of the corresponding part is extracted and the frame number, location, time The labeling information of the encrypted image data is separately generated and combined with the encrypted image data to generate final encrypted image data. Thus, when the encrypted image data is searched, only the labeling information can be decrypted and searched, . ≪ / RTI >

Although the present invention has been described and illustrated in detail, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (9)

  1. A data encryption unit for encrypting the moving image data transmitted from the image data generation unit for converting the optical signal of the subject inputted from the optical system into an electric signal through the image pickup element and generating the image data of the moving image;
    A pixel calculation unit for calculating a rate of change of pixel values of the previous and next frames of the image data;
    A labeling generation unit for generating labeling information for a frame when the rate of change of the pixel value calculated by the pixel calculation unit is equal to or greater than a predetermined value;
    A labeling encryption unit for encrypting the labeling information generated by the labeling generation unit; And
    And a data combining unit for combining the encrypted image data transmitted from the data encryption unit and the encrypted labeling information transmitted from the labeling encryption unit.
  2. The method according to claim 1,
    The pixel calculation unit
    A vector generating unit for converting a pixel change amount of a pixel into a vector value in each frame of the image data and generating the vector value;
    A vector storage unit for temporarily storing the vector value; And
    And a vector operation unit for calculating a difference between the stored forward and backward frame vector values.
  3. An image compressing unit for compressing the image data transmitted from the image data generating unit for converting the optical signal of the subject input from the optical system into an electric signal through the image pickup device to generate image data;
    A data encryption unit for encrypting the compressed image data transmitted from the image compression unit;
    A pixel detection unit for detecting a rate of change of pixel values of the previous and next frames of the image data calculated by the image compression unit;
    A labeling generating unit for generating labeling information for the frame when the rate of change of the pixel value detected by the pixel detecting unit is equal to or greater than a predetermined value;
    A labeling encryption unit for encrypting the labeling information generated by the labeling generation unit; And
    And a data combining unit for combining the encrypted image data transmitted from the data encryption unit and the encrypted labeling information transmitted from the labeling encryption unit.
  4. Converting an optical signal of an object input from an optical system into an electric signal through an imaging element to generate image data;
    Encrypting the image data to generate encrypted image data;
    Calculating a rate of change of pixel values of the frame before and after the image data;
    Generating labeling information for the frame when the rate of change of the pixel value is equal to or greater than a predetermined value;
    Encrypting the labeling information to generate encrypted labeling information; And
    And combining the encrypted image data with the encrypted labeling information to generate encrypted labeled image data.
  5. Converting an optical signal of an object input from an optical system into an electric signal through an imaging element to generate image data;
    Compressing the image data to generate compressed image data;
    Encrypting the compressed image data to generate encrypted image data;
    Detecting a rate of change of the frame pixel values of the previous and next frames of the image data calculated in the compressing step of the image data;
    Generating labeling information for the frame when the rate of change of the detected pixel value is equal to or greater than a predetermined value;
    Encrypting the labeling information to generate encrypted labeling information; And
    And combining the encrypted image data with the encrypted labeling information to generate encrypted labeled image data.
  6. The method according to claim 4 or 5,
    Wherein the labeling information includes a frame number of image data, a photographing time of the frame, position information of a detected pixel, and a camera unique number.
  7. Authenticating the user by receiving authentication information from a user;
    Receiving a search key from the authenticated user;
    Separately calling encrypted labeling information from the encrypted labeling image data in which the encrypted image data and the encrypted labeling information are combined;
    Decoding the called labeling information;
    Retrieving labeling information corresponding to the search key;
    Calling the encrypted image data corresponding to the retrieved labeling information;
    Decoding the called image data; And
    And outputting the decrypted image data.
  8. 8. The method of claim 7,
    Further comprising decompressing the decrypted image data. ≪ RTI ID = 0.0 > 11. < / RTI >
  9. 8. The method of claim 7,
    Wherein the search key is a frame number of image data, a photographing time of a frame, position information of an image data pixel, or a camera unique number.
KR1020050079161A 2005-08-29 2005-08-29 Encryption device having an image encryption function with searching of the image and encryption and searching method of the encryption image KR100712162B1 (en)

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