KR101559647B1 - Method and system for partially encrypting event image - Google Patents

Abstract

A method for encrypting an event image in a black box system includes: obtaining at least one image from a camera; Detecting an event image of a predetermined event among the at least one image; Separating the detected event image into a region of interest and a remaining region; Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And storing the encrypted region of interest and the remaining region.

Description

METHOD AND SYSTEM FOR PARTIALLY ENCRYPTING EVENT IMAGE [0002]

The present invention relates to a system and a method for partially encrypting an event image in an event recording system including a black box system or a surveillance camera system and a method of encrypting an event image by encrypting an event image to prevent security enhancement and leakage of personal information Technology.

An event image captured by an existing event data recorder (EDR) or a closed circuit television (CCTV) is stored without being encrypted, thereby weakening the security of an object included in the stored event image. For example, if an event image of a conventional black box or a surveillance camera includes a human face or a license plate, a human face or a license plate is stored as it is, and a human face or a license plate is exposed in the process of reproducing the stored event image , It may cause problems of leakage of personal information.

Accordingly, the present invention proposes a technique for improving security and preventing personal information from being leaked by partially encrypting and storing an event image captured in an event recording system including a black box or a surveillance camera.

According to the embodiment of the present invention, the event image is partially encrypted in the event recording system including the black box system or the surveillance camera system, and the encrypted event image is decrypted by the decryption apparatus having the decryption key, A method, apparatus and system for preventing personal information leakage are provided.

According to another aspect of the present invention, there is provided a method, apparatus, and system for detecting an event image in which a preset event occurs among at least one image acquired from a camera.

According to another aspect of the present invention, there is provided a method, apparatus, and system for encrypting only an area of interest including an object corresponding to an event in an event image in an event image encryption process.

According to another aspect of the present invention, there is provided a method, apparatus, and system for decoding a region of interest encrypted by a decoding apparatus having a decoding key.

According to an embodiment of the present invention, a system for encrypting / decrypting an event image acquires at least one image from a camera, detects an event image in which a predetermined event has occurred from the at least one image, An encryption unit for encrypting the ROI with the ROI and separating the ROI into a ROI and a remaining ROI, encrypting the ROI among the ROI and the ROI using a pre-assigned encryption key, and storing the ROI and the ROI; And a decryption unit for decrypting the encrypted region of interest using the decryption key corresponding to the encryption key used by the encryption apparatus and restoring the event image using the decrypted region of interest and the remaining region do.

The decryption key may be given only to a limited decryption apparatus that has been previously authorized regardless of whether the decryption key is the owner of the encryption apparatus.

The decoding apparatus may restore an event image including the encrypted ROI if the decryption key corresponding to the encryption key used by the encryption apparatus does not exist.

According to an embodiment of the present invention, a method for encrypting an event image in a black box system includes: obtaining at least one image from a camera; Detecting an event image of a predetermined event among the at least one image; Separating the detected event image into a region of interest and a remaining region; Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And storing the encrypted region of interest and the remaining region.

The step of encrypting the ROI may include encrypting the ROI using a public key corresponding to the asymmetric encryption scheme.

The step of detecting an event image in which a predetermined event has occurred among the at least one image may include comparing an object included in the event image with a plurality of objects included in a list stored in advance.

The step of separating the detected event image into a region of interest and a remaining region may include assigning an identifier for at least one of the region of interest and the remaining region such that the region of interest and the remaining region may be identified have.

When a decoding apparatus having a decoding key accesses the encrypted ROI and the remaining region, the decoding apparatus decodes the ROI and the remaining region using an identifier allocated to at least one of the ROI and the RND Can be identified.

The step of detecting an event image in which a predetermined event has occurred among the at least one image may be a step of detecting an event image in which a predetermined event has occurred among the at least one image with respect to each of the frames or with a predetermined time interval.

The step of detecting an event image in which a predetermined event has occurred among the at least one image may be a step of detecting an event image using at least one of a face detection technique and an object detection technique.

The step of storing the encrypted ROI and the remaining region may include storing the encrypted ROI and the remaining region such that the encrypted ROI and the remaining region are time synchronized.

According to an embodiment of the present invention, a method of encrypting an event image in a surveillance camera system includes: obtaining at least one image from a camera; Detecting an event image of a predetermined event among the at least one image; Separating the detected event image into a region of interest and a remaining region; Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And storing the encrypted region of interest and the remaining region.

According to an embodiment of the present invention, a black box system includes an image acquiring unit that acquires at least one image from a camera; An event image detecting unit for detecting an event image in which a predetermined event occurs among the at least one image; A region separator for separating the detected event image into a region of interest and a remaining region; An area of interest encrypting unit that encrypts the area of interest of the area of interest and the remaining area using a pre-assigned encryption key; And a storage unit for storing the encrypted ROI and the remaining area.

The ROI encryption unit may encrypt the ROI using a public key corresponding to the asymmetric encryption scheme.

The event image detecting unit may compare an object included in the event image with a plurality of objects included in a list stored in advance.

The region separation unit may allocate an identifier for at least one of the ROI and the ROI so that the ROI and the ROI can be identified.

The event image detection unit may detect an event image using at least one of a face detection technique and an object detection technique.

According to the embodiment of the present invention, the event image is partially encrypted in the event recording system including the black box system or the surveillance camera system, and the encrypted event image is decrypted by the decryption apparatus having the decryption key, A method, apparatus and system for preventing personal information leakage can be provided.

According to another aspect of the present invention, there is provided a method, apparatus, and system for detecting an event image in which a predetermined event occurs among at least one image acquired from a camera.

In addition, according to an embodiment of the present invention, a method, an apparatus, and a system for encrypting only an area of interest including an object corresponding to an event in an event image in the process of encrypting the event image can be provided.

In addition, according to an embodiment of the present invention, a method, an apparatus, and a system for decoding a region of interest encrypted by a decoding apparatus having a decoding key can be provided.

1 is a diagram illustrating a black box system in an embodiment of the present invention.
2 is a diagram illustrating a surveillance camera system in an embodiment of the present invention.
3 is a diagram illustrating a process of separating a ROI and a ROI when a human object is included in an event image, according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a process of separating a region of interest and a remaining region when an automobile object is included in an event image, according to an exemplary embodiment of the present invention.
FIG. 5A is a diagram illustrating a process of detecting an event image and separating the event image into a region of interest and a remaining region in an embodiment of the present invention.
5B is a diagram illustrating an event image in which an encrypted event image is decrypted and reconstructed according to an embodiment of the present invention.
6 is a flowchart illustrating a method of encrypting an event image in a black box system according to an exemplary embodiment of the present invention.
7 is a block diagram illustrating a black box system in an embodiment of the present invention.
8 is a flowchart illustrating a method of encrypting an event image in a surveillance camera system according to an exemplary embodiment of the present invention.
9 is a block diagram illustrating a surveillance camera system in an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. In addition, the same reference numerals shown in the drawings denote the same members.

1 is a diagram illustrating a black box system in an embodiment of the present invention.

Referring to FIG. 1, a black box system according to an embodiment of the present invention includes a camera 110 installed inside a vehicle so as to photograph an external front portion and a rear portion. Here, the image photographed by the camera 110 may be transmitted to and stored in the storage 120 installed in the vehicle, or may be transmitted to the image storage server 130 separately provided outside the automobile and stored.

The black box system detects an event image in which an event has occurred in the image acquired by the camera 110, separates the detected event image into the ROI and the remaining ROI, encrypts the ROI and the ROI from the storage 120 Or to the image storage server 130 and store them. At this time, the black box system can encrypt the region of interest using the public key corresponding to the asymmetric encryption scheme. Here, the encrypted ROI may be decoded by a decoding apparatus having a decoding key. At this time, the decryption key can be given only to a limited decryption apparatus that has been previously authorized regardless of whether or not the decryption key is the owner of the encryption apparatus. A detailed description thereof will be given below.

2 is a diagram illustrating a surveillance camera system in an embodiment of the present invention.

Referring to FIG. 2, the surveillance camera system according to an embodiment of the present invention includes a plurality of cameras 211 and 212 installed to capture a predetermined space 210, respectively. Here, the images photographed by the plurality of cameras 211 and 212 may be transmitted to and stored in a separate storage device or an image storage server, and may be displayed on the separate image reproducing device 220. For example, the image photographed by the first surveillance camera 211 is displayed on the first image reproducing screen 221 and the image photographed by the second surveillance camera 212 is displayed on the second image reproducing screen 222 .

The surveillance camera system detects an event image in which an event occurred in each of the plurality of cameras 211 and 212, separates the detected event image into a region of interest and a remaining region, Area to a storage device or an image storage server and store the event image, and reproduce the stored event image through the image reproducing device 220. [ At this time, the surveillance camera system can encrypt the ROI using the public key corresponding to the asymmetric encryption scheme. . Here, the encrypted ROI may be decoded by a decoding apparatus having a decoding key. At this time, the decryption key can be given only to a limited decryption apparatus that has been previously authorized regardless of whether or not the decryption key is the owner of the encryption apparatus.

When the event image reproduced in the image reproducing apparatus 220 is decoded, since the encrypted region of interest has been decoded, the surveillance camera system can restore and reproduce the photographed event image as it is. On the other hand, when the event image reproduced in the image reproducing apparatus 220 is not decoded, the surveillance camera system automatically mosaic or blank the encrypted region of interest, thereby generating a mosaic or blank processed region of interest It is possible to play back the included event video. In this case, if the decryption process is not performed in the black box system, the encrypted interest area is automatically mosaicked or blanked, so that the event image including the mosaic or blanked interest area can be restored.

3 is a diagram illustrating a process of separating a ROI and a ROI when a human object is included in an event image, according to an exemplary embodiment of the present invention.

Referring to FIG. 3, a surveillance camera system according to an exemplary embodiment of the present invention detects an event image in which a predetermined event has occurred for at least one image acquired from a camera, Area, and can encrypt the area of interest. Here, the preset event may be set as a human object and updated by the administrator and the surveillance camera owner.

For example, the surveillance camera system may recognize that a human object 310 is included in the event image, and may separate the event image into the region of interest 320 and the remaining region. In this case, the remaining area may refer to all the remaining areas except the area of interest 320 among the event images. Accordingly, the column object 330, which is an object other than the human object 310, may be unencrypted by being included in the remaining area.

In addition, the region of interest 320 may be set for the entire human object 310. At this time, in setting the region of interest 320 in the event image including the human object 310, whether to include the whole of the human object 310 or only the face of the human object 310, Can be determined by the owner.

Accordingly, the surveillance camera system may separate the event image into the region of interest 340 and the remaining region including only the face of the human object 310. [ In this case, the remaining region may refer to all the remaining regions of the event image except for the region of interest 340.

Although not shown in the drawings, the black box system according to an exemplary embodiment of the present invention can also separate the ROI and the ROI when the human image is included in the event image, as described above.

4 is a diagram illustrating a process of separating a region of interest and a remaining region when an automobile object is included in an event image, according to an exemplary embodiment of the present invention.

Referring to FIG. 4, a black box system according to an embodiment of the present invention detects an event image in which a predetermined event has occurred for at least one image obtained from a camera, Area, and can encrypt the area of interest. Here, the preset event can be set as an automobile object, and can be updated by the manager and the black box owner.

For example, the black box system may recognize that an automobile object 410 is included in the event image, and may separate the event image into the region of interest 420 and the remaining region. In this case, the remaining region may refer to all the regions except for the region of interest 420 among the event images. Thus, the bus stop object 430, which is an object other than the automobile object 410, may be unencrypted by being included in the remaining area, and the license plate may be encrypted by being included in the area of interest 420. [

Although not shown in the drawings, in the surveillance camera system according to the embodiment of the present invention, when an automobile object is included in an event image, the interest area and the remaining area can be separated as described above.

FIG. 5A is a diagram illustrating a process of detecting an event image and separating the event image into a region of interest and a remaining region in an embodiment of the present invention.

Referring to FIG. 5A, a black box system according to an embodiment of the present invention can detect an event image in which a preset event occurs, with respect to each frame of at least one image obtained from a camera or at a predetermined time interval .

For example, the black box system may include at least one image obtained from the camera for a first image 510, a second image 520, and a third image 530 divided into a plurality of frames, The second image 520 and the third image 530 by using at least one of the recognized objects and the plurality of objects included in the pre-stored list, By comparing them with each other, an event image can be detected. More specifically, if the second image 520 and the third image 530 include a human object, and the plurality of objects included in the previously stored list include a human object, The image 520 and the third image 530 can be detected as an event image. At this time, the pre-stored list can be updated by the manager or the black box owner.

Then, the black box system can separate the detected event image into the region of interest and the remaining regions. The black box system may also assign an identifier for at least one of the region of interest and the remaining region such that the region of interest and the remaining region may be identified. Here, the process of allocating an identifier may include a step of allocating, when the decoding apparatus having the decoding key accesses the encrypted ROI and the remaining ROI, the decoding apparatus uses the identifier assigned to at least one of the ROI and the remaining ROI, Can be performed in order to identify the region. For example, the black box system separates the second image 520 into a first region of interest 521 and a first remaining region 522, and a first region of interest 521 and a first remaining region 522, The third image 530 may be divided into a second region of interest 531 and a second region 532 and a second region of interest 531 and a second region of interest 532). ≪ / RTI > Therefore, it is possible to identify the first region of interest 521 and the first remaining region 522 included in the second image 520 before decoding in the decoding apparatus corresponding to the black box system, The second region of interest 531 and the second remaining region 532 included in the image 530 can be identified.

The black box system can then partially encrypt the event image using a pre-assigned encryption key, e.g., only the region of interest can be encrypted. At this time, a region of interest including personal information such as a face of a person, a license plate of a car, etc., is encrypted using an encryption key, thereby preventing personal information from being leaked.

In addition, the decryption key may be given only to a limited decryption apparatus that has been previously authorized, regardless of whether or not the decryption key is the owner of the encryption apparatus. For example, a decryption key corresponding to an encryption key is owned and managed by a limited authority or entity such as a police station, an insurance company, and a public entity. In particular, the black box owner can not obtain the decryption key without special permission.

If the decoding device having the decryption key restores the event image, the encrypted interest area is decoded by the decryption key, merged with the remaining area, and the captured event image can be restored as it is.

On the other hand, even if the owner is a black box owner, if a subject who does not have a decryption key restores the event image through the decryption device, the region of interest may not be restored properly. However, despite the fact that the area of interest is not restored properly, the rest of the area is properly restored so that the black box owner can verify information about the rest of the area except for the personal information to be protected.

As described above, in order to selectively encrypt / decrypt only the region of interest without affecting the remaining region of the event image, the present invention can perform the following processes. Here, not affecting the remaining area may mean that it is possible to restore the area other than the area of interest even if the decryption key does not exist.

1) The event image is divided into a plurality of regions, and the region of interest and the remaining region among the plurality of divided regions are extracted.

2) The bitstream for the remaining area is stored as it is through general image processing techniques, while the bitstream for the area of interest is encrypted using texture data, motion data, or other arbitrary data. At this time, a decryption key is required to properly restore the area of interest, and if the decryption key is absent, the restored area of interest is maintained in a state transformed by texture data, motion data, or other arbitrary data.

In order to selectively encrypt only the region of interest, the black box system does not encode the remaining region, but uses a constrained motion estimation technique, an exceptional handlings for the half-pel interpolation technique And intra-BL mode (Intra BL mode in the boundary of a ROI) technique at the region-of-interest boundary.

At this time, the limited motion estimation technique is a technique for preventing inter-frame dependency of a region of interest in a background in a picture, and can independently restrict the region of interest and the background region during the motion estimation process. In addition, the exception handling technique for half-pixel interpolation may include Half-pel interpolation or Quarter-pel interpolation. In this case, the 1/4 pixel interpolation method may be a technique of estimating motion using the motion vector accuracy of 1/4 of the luminance sample grid spacing displacement. The upsampling technique of the intra BL mode at the boundary of the region of interest is a technique for performing inter-layer intra-texture prediction for inter-layer prediction of intra-coded macroblocks. By using an intra texture of a base layer, The layer can be predicted.

As described above, the black box system can encrypt a region of interest using a public key corresponding to an asymmetric encryption scheme. For example, the black box system can encrypt the first area of interest 521 included in the second image 520 using the public key, and the second area of interest 531 included in the third image 530 ) Can be encrypted using a public key.

In addition, the black box system may store the encrypted region of interest and the remaining region. At this time, the black box system can store the encrypted interest area and the remaining area to be time-synchronized between the encrypted interest area and the remaining area. For example, the black box system can synthesize and store the first image 520 and the first image 520, which are included in the second image 520, And the second residual region 532 included in the second region 531 and the second region 532 included in the second region 532. [

The decryption device having the decryption key accesses the encrypted interest area and the remaining area to identify the area of interest and the remaining area using the identifier assigned to at least one of the area of interest and the remaining area, Can be used to decode the region of interest. At this time, the decryption apparatus can decrypt the region of interest using the private key corresponding to the asymmetric encryption scheme, and merge the region of interest with the remaining region, thereby restoring the event image. Here, the decryption key may be given only to a limited decryption apparatus that has been previously authorized, regardless of whether or not the decryption key is the owner of the encryption apparatus.

For example, the decryption apparatus according to an exemplary embodiment of the present invention recovers an encrypted event image using a decryption key corresponding to an encryption key of a black box system or a surveillance camera system, As shown in FIG. Accordingly, the black box system or the surveillance camera system according to an embodiment of the present invention can perform encryption including a public key that is an encryption key, but does not include a private key corresponding to the public key, none. As a more specific example, the decryption device may be a device installed in a limited organization such as a police, an insurance company, or a public entity, or may be a device inaccessible to the owner of a black box system or surveillance camera.

Also, the decryption apparatus may be installed in the black box system or the surveillance camera system, but the private key, which is the decryption key, is separately stored and stored so that the owner of the black box system or the surveillance camera system can not perform the decryption process have. For example, the private key is stored and archived in a limited number of agencies and entities such as police, insurance companies, or public agencies, so that the process of decrypting the encrypted event image in a black box system or surveillance camera system is handled by a police, insurance company, But only by the same limited authority and subject.

5B is a diagram illustrating an event image in which an encrypted event image is decrypted and reconstructed according to an embodiment of the present invention.

Referring to FIG. 5B, an event recording system including a black box system and a surveillance camera system according to an embodiment of the present invention may include an encryption key only for a region of interest, which is an area corresponding to a human face, Can be used to encrypt. Specifically, the bitstream for the region of interest is encrypted using texture data, motion data, or FGS data (Fine Grain Scalability), so that the region of interest can be encrypted. Further, the encrypted interest area is decrypted by the decryption key corresponding to the encryption key, so that the event image including the encrypted interest area and the remaining area can be restored. For example, when the decryption apparatus decrypts the encrypted region of interest using the decryption key, the decrypted region of interest and the remaining region are reconstructed in the same manner as the captured event image 540 as the first reconstructed event image 550 .

On the other hand, when the decryption apparatus decrypts the encrypted ROI without having a decryption key, the ROI can be restored by merging with the remaining region while maintaining the state of being transformed by the texture data, the motion data, or the FGS data . For example, when the decryption apparatus decrypts the encrypted region of interest without having a decryption key, the region of interest is maintained in a state deformed by the texture data and is mosaiced, The event image 540 may be reconstructed differently from the captured event image 540 as shown in FIG. In addition, when the decryption apparatus decrypts the encrypted ROI without having a decryption key, the ROI remains mosaic-processed by the motion data, so that the ROI and the remaining ROI are converted into the third restored event image 570 ), And the ROI is mosaic-processed by the FGS data, so that the region of interest and the rest of the region are reconstructed from the fourth reconstructed event image 580 and the fourth reconstructed event image 540. [ The event image 540 can be reconstructed differently from the captured event image 540.

Therefore, the decryption key is assigned only to a limited decryption apparatus that has been previously authorized regardless of whether it is the owner of the encryption apparatus (for example, the decryption key is owned and managed by a limited authority such as police, insurance company, , It is possible to prevent personal information from being leaked in the process of decrypting the encrypted event image.

6 is a flowchart illustrating a method of encrypting an event image in a black box system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, a black box system according to an embodiment of the present invention acquires at least one image from a camera (610).

In addition, the black box system determines whether a predetermined event has occurred (620), and detects an event image in which at least one of the at least one event occurs when a predetermined event occurs in at least one image (630). At this time, the black box system can detect the event image by comparing the objects included in the event image with the plurality of objects included in the pre-stored list. In addition, the black box system can detect an event image in which at least one of the at least one event occurs, with respect to each of the frames or with a predetermined time interval. In addition, the black box system can detect an event image using at least one of a face detection technique and an object detection technique.

In addition, the black box system separates the detected event image into a region of interest and a remaining region (640). In this case, the step of separating the detected event image into the ROI and the ROI may include assigning an identifier for at least one of the ROI and the ROI so that the ROI and the ROI can be identified.

Here, when the decryption apparatus having the decryption key accesses the encrypted ROI and the remaining region, the decryption apparatus can identify the ROI and the remaining region using an identifier assigned to at least one of the ROI and the remaining ROI.

In addition, the black box system may determine whether an encryption key is assigned (650), and if the encryption key is not previously allocated, the black box system may allocate an encryption key (660). In this case, the steps 650 and 660 can be selectively performed, and the technique of allocating the encryption key without releasing the decryption key to individuals is outside the scope of the technical idea of the present invention, so a detailed description thereof will be omitted .

The black box system then encrypts (670) the ROI of interest and the remaining ROI using the pre-assigned encryption key.

In addition, the black box system stores (680) the encrypted region of interest and the remaining region. At this time, the black box system can store the encrypted interest area and the remaining area to be time-synchronized between the encrypted interest area and the remaining area.

7 is a block diagram illustrating a black box system in an embodiment of the present invention.

7, the black box system includes an image acquisition unit 710, an event image detection unit 720, an area separation unit 730, a ROI encryption unit 740, (750).

The image acquisition unit 710 acquires at least one image from the camera.

The event image detection unit 720 detects an event image in which at least one event has occurred.

Also, the event image detecting unit 720 may compare the objects included in the event image with the plurality of objects included in the pre-stored list.

In addition, the event image detector 720 may detect an event image in which at least one of the at least one event occurs, with respect to each of the frames or at predetermined time intervals.

In addition, the event image detector 720 may detect an event image using at least one of a face detection method and an object detection method.

The region separation unit 730 separates the detected event image into a region of interest and a remaining region.

In addition, the region separation unit 730 may allocate an identifier for at least one of the region of interest and the remaining region so that the region of interest and the remaining region can be identified.

Therefore, when the decryption apparatus having the decryption key accesses the encrypted ROI and the remaining region, the decryption apparatus can identify the ROI and the remaining region using the identifier assigned to at least one of the ROI and the remaining ROI.

The ROI encryption unit 740 encrypts the ROI of the ROI and the ROI using the pre-assigned encryption key.

In addition, the ROI encryption unit 740 may encrypt the ROI using the public key corresponding to the asymmetric encryption scheme.

The storage unit 750 stores the encrypted interest area and the remaining area.

In addition, the storage unit 750 may store the encrypted interest area and the remaining area so as to be time-synchronized between the encrypted interest area and the remaining area.

8 is a flowchart illustrating a method of encrypting an event image in a surveillance camera system according to an exemplary embodiment of the present invention.

Referring to FIG. 8, a surveillance camera system according to an embodiment of the present invention acquires at least one image from a camera (810).

In addition, the surveillance camera system determines whether a preset event is generated (820), and detects an event image in which at least one preset event occurred in at least one image when a predetermined event occurs (830). At this time, the surveillance camera system can detect the event image by comparing the objects included in the event image with the plurality of objects included in the pre-stored list. In addition, the surveillance camera system can detect an event image in which at least one image has a preset event, with respect to each frame or at predetermined time intervals. In addition, the surveillance camera system can detect an event image using at least one of a face detection technique and an object detection technique.

In addition, the surveillance camera system separates the detected event image into a region of interest and a remaining region (840). In this case, the step of separating the detected event image into the ROI and the ROI may include assigning an identifier for at least one of the ROI and the ROI so that the ROI and the ROI can be identified.

Here, when the decryption apparatus having the decryption key accesses the encrypted ROI and the remaining region, the decryption apparatus can identify the ROI and the remaining region using an identifier assigned to at least one of the ROI and the remaining ROI.

In addition, the surveillance camera system determines whether the encryption key is allocated (850). If the encryption key is not allocated in advance, the surveillance camera system can allocate the encryption key (860).

The surveillance camera system then encrypts (870) the ROI of the ROI and the remaining ROI using the pre-assigned encryption key.

In addition, the surveillance camera system stores the encrypted ROI and the remaining ROI (880). At this time, the surveillance camera system can store the encrypted interest area and the remaining area so as to be time-synchronized between the encrypted interest area and the remaining area.

9 is a block diagram illustrating a surveillance camera system in an embodiment of the present invention.

9, the surveillance camera system includes an image acquisition unit 910, an event image detection unit 920, an area separation unit 930, a ROI encryption unit 940, (950).

The image acquiring unit 910 acquires at least one image from the camera.

The event image detecting unit 920 detects an event image in which at least one preset event has occurred.

Also, the event image detecting unit 920 can compare the objects included in the event image with the plurality of objects included in the pre-stored list.

In addition, the event image detecting unit 920 can detect an event image in which at least one of the at least one event occurs, with respect to each of the frames or with a predetermined time interval.

In addition, the event image detecting unit 920 may detect the event image using at least one of the face detecting method and the object detecting method.

The region separation unit 930 separates the detected event image into a region of interest and a remaining region.

In addition, the region separator 930 may assign an identifier for at least one of the region of interest and the remaining region so that the region of interest and the remaining region can be identified.

Therefore, when the decryption apparatus having the decryption key accesses the encrypted ROI and the remaining region, the decryption apparatus can identify the ROI and the remaining region using the identifier assigned to at least one of the ROI and the remaining ROI.

The ROI encryption unit 940 encrypts the ROI of the ROI and the ROI using the pre-assigned encryption key.

Also, the ROI encryption unit 940 can encrypt the ROI using the public key corresponding to the asymmetric encryption scheme.

The storage unit 950 stores the encrypted interest area and the remaining area.

In addition, the storage unit 950 may store the encrypted interest area and the remaining area so as to be time-synchronized between the encrypted interest area and the remaining area.

The decryption apparatus may decrypt the encrypted region of interest using the decryption key corresponding to the encryption key used by the encryption apparatus described above and reconstruct the event image using the decrypted region of interest and the remaining region. In particular, the decryption key may be assigned only to a limited decryption apparatus that has been previously authorized, regardless of whether or not the decryption key is the owner of the encryption apparatus.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (18)

A system for encrypting / decrypting an event image,
The method of claim 1, further comprising: acquiring at least one image from the camera; detecting an event image in which a predetermined event occurs in the at least one image; separating the detected event image into a region of interest and a remaining region; An encrypting device for encrypting the ROI among the ROI and the remaining ROI, and storing the encrypted ROI and the ROI; And
Decrypting the encrypted region of interest using a decryption key corresponding to the encryption key used by the encryption apparatus, the access key being restricted by the owner of the encryption apparatus, and using the decrypted region of interest and the remaining region And decodes the event image
Lt; / RTI >
The decryption key
Irrespective of whether it is the owner of the encryption apparatus or not, is given only to the limited decryption apparatus to which permission has been given in advance,
The decoding device
And decrypts an event image including the region of interest in an encrypted state when the decryption key corresponding to the encryption key used by the encryption apparatus does not exist. delete delete delete A method for encrypting an event image in a black box system,
Obtaining at least one image from a camera;
Detecting an event image of a predetermined event among the at least one image;
Separating the detected event image into a region of interest and a remaining region;
Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And
Storing the encrypted region of interest and the remaining region
Lt; / RTI >
The step of encrypting the region of interest
Encrypting the region of interest using a public key corresponding to an asymmetric encryption scheme; and encrypting the region of interest using a public key corresponding to an asymmetric encryption scheme. A method for encrypting an event image in a black box system,
Obtaining at least one image from a camera;
Detecting an event image of a predetermined event among the at least one image;
Separating the detected event image into a region of interest and a remaining region;
Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And
Storing the encrypted region of interest and the remaining region
Lt; / RTI >
Wherein the step of detecting an event image in which a predetermined event occurs among the at least one image
Comparing the objects included in the event image with a plurality of objects included in a list stored in advance,
And encrypting the event image in the black box system. A method for encrypting an event image in a black box system,
Obtaining at least one image from a camera;
Detecting an event image of a predetermined event among the at least one image;
Separating the detected event image into a region of interest and a remaining region;
Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And
Storing the encrypted region of interest and the remaining region
Lt; / RTI >
The step of separating the detected event image into a region of interest and a remaining region includes:
Assigning an identifier for at least one of the region of interest and the remaining region such that the region of interest and the remaining region can be identified
And encrypting the event image in the black box system. 8. The method of claim 7,
When a decoding apparatus having a decoding key accesses the encrypted ROI and the remaining region, the decoding apparatus decodes the ROI and the remaining region using an identifier allocated to at least one of the ROI and the RND A method for encrypting an event image in a black box system that identifies the event. A method for encrypting an event image in a black box system,
Obtaining at least one image from a camera;
Detecting an event image of a predetermined event among the at least one image;
Separating the detected event image into a region of interest and a remaining region;
Encrypting the ROI of the ROI and the remaining ROI using a pre-assigned encryption key; And
Storing the encrypted region of interest and the remaining region
Lt; / RTI >
Wherein the step of detecting an event image in which a predetermined event occurs among the at least one image
And detecting an event image in which a predetermined event occurs among the at least one image with respect to each of the frames or with a predetermined time interval. 10. The method according to any one of claims 5 to 9,
Wherein the step of detecting an event image in which a predetermined event occurs among the at least one image
And detecting an event image using at least one of a face detection method and an object detection method. 10. The method according to any one of claims 5 to 9,
Wherein the step of storing the encrypted region of interest and the remaining region comprises:
And storing the encrypted region of interest and the remaining region such that time synchronization between the encrypted region of interest and the remaining region is synchronized. delete delete delete A camera system comprising a black box system or a surveillance camera system,
An image acquiring unit acquiring at least one image from a camera;
An event image detecting unit for detecting an event image in which a predetermined event occurs among the at least one image;
A region separator for separating the detected event image into a region of interest and a remaining region;
An area of interest encrypting unit that encrypts the area of interest of the area of interest and the remaining area using a pre-assigned encryption key; And
A storage unit for storing the encrypted interest area and the remaining area,
Lt; / RTI >
The ROI encryption unit
And encrypts the region of interest using a public key corresponding to an asymmetric encryption scheme. A camera system comprising a black box system or a surveillance camera system,
An image acquiring unit acquiring at least one image from a camera;
An event image detecting unit for detecting an event image in which a predetermined event occurs among the at least one image;
A region separator for separating the detected event image into a region of interest and a remaining region;
An area of interest encrypting unit that encrypts the area of interest of the area of interest and the remaining area using a pre-assigned encryption key; And
A storage unit for storing the encrypted interest area and the remaining area,
Lt; / RTI >
The event image detection unit
And compares the object included in the event image with a plurality of objects included in the pre-stored list. A camera system comprising a black box system or a surveillance camera system,
An image acquiring unit acquiring at least one image from a camera;
An event image detecting unit for detecting an event image in which a predetermined event occurs among the at least one image;
A region separator for separating the detected event image into a region of interest and a remaining region;
An area of interest encrypting unit that encrypts the area of interest of the area of interest and the remaining area using a pre-assigned encryption key; And
A storage unit for storing the encrypted interest area and the remaining area,
Lt; / RTI >
The region separation unit
And assigns an identifier for at least one of the ROI and the ROI such that the ROI and the ROI can be identified. 18. The method according to any one of claims 15 to 17,
The event image detection unit
A camera system for detecting an event image using at least one of a face detection technique and an object detection technique.

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