Video management system and video management method

1. A video management system comprising:

an imaging device configured to generate a first image at a first resolution; and

a video management server configured to store a second image obtained by converting the first image,

wherein the imaging device comprises:

a high-resolution image storage configured to store the first image;

a processor configured to:

convert the first image into the second image having a second resolution that is lower than the first resolution; and

transmit the second image to the video management server, and

wherein the video management server comprises:

a low-resolution image storage configured to store the second image; and

a processor configured to generate low-resolution image metadata and an index of the low-resolution image metadata by analyzing the second image,

wherein the processor of the video management server is further configured to:

receive, from an external device, an information request signal;

determine whether information corresponding to the information request signal is included in the second image; and

determine whether the information corresponding to the information request signal is included in the first image when it is determined that the information corresponding to the information request signal is not included in the second image.

2. The video management system of claim 1 , wherein the processor of the video management server is further configured to:

provide, to the external device, information comprising at least one from among the second image, a portion of the second image, the low-resolution image metadata, and the index of the low-resolution image metadata when it is determined that the information corresponding to the information request signal is included in the second image.

3. The video management system of claim 2 , wherein, when it is determined that the first image is required to provide the information corresponding to the information request signal, the video management server is further configured to transmit, to the imaging device, a transmission signal to provide information comprising at least one from among the first image, a portion of the first image, and information obtained by analyzing the first image to the external device.

4. The video management system of claim 3 , wherein the imaging device is further configured to transmit information corresponding to the transmission signal to the external device in response to receiving the transmission signal.

5. The video management system of claim 1 , wherein the imaging device is further configured to generate high-resolution image metadata and an index of the high-resolution image metadata by analyzing the first image.

6. The video management system of claim 5 , wherein the imaging device is further configured to transmit, to the video management server, at least a part of the high-resolution image metadata and at least a part of the index of the high-resolution image metadata, and

wherein the video management server is further configured to store the at least part of the high-resolution image metadata and the at least part of the index of the high-resolution image metadata.

7. The video management system of claim 6 , wherein the processor of the imaging device is further configured to generate the low-resolution image metadata comprising only metadata not included in the high-resolution image metadata, from among metadata corresponding to the second image.

8. The video management system of claim 5 , wherein the processor of the imaging device is further configured to generate the high-resolution image metadata comprising only metadata corresponding to information that is included in the first image and is not included in the second image, from among metadata corresponding to the first image.

9. The video management system of claim 5 , wherein the imaging device is further configured to store only high-resolution image metadata corresponding to information that is included in the first image and is not included in the second image, from among the high-resolution image metadata.

10. The video management system of claim 1 , wherein the video management server is further configured to transmit, to the imaging device, at least a part of the low-resolution image metadata and at least a part of the index of the low-resolution image metadata, and

wherein the imaging device is further configured to store the at least part of the low-resolution image metadata and the at least part of the index of the low-resolution image metadata.

11. The video management system of claim 1 , wherein the processor of the imaging device is further configured to classify the first image into a transmission-required image required to be transmitted to the video management server and a transmission-unrequired image not required to be transmitted to the video management server by analyzing the first image based on a predetermined criterion, and

wherein the processor of the imaging device is further configured to generate the second image by converting the transmission-required image.

12. The video management system of claim 11 , wherein the predetermined criterion comprises whether a preset person or object appears in the first image, whether a sound equal to or higher than a preset decibel is produced in the first image, and a preset event occurs in the first image.

13. The video management system of claim 1 , wherein the processor of the imaging device is further configured to obtain the second image by converting the first resolution of the first image into the second resolution that is lower than the first resolution, and by removing a sound component from the first image.

14. A video management system comprising:

an imaging device configured to generate a first image at a first resolution; and

a video management server configured to store a second image obtained by converting the first image,

wherein the imaging device comprises:

a high-resolution image storage configured to store the first image;

a processor configured to:

convert the first image into the second image having a second resolution that is lower than the first resolution; and

transmit the second image to the video management server, and

wherein the video management server comprises:

a low-resolution image storage configured to store the second image; and

a processor configured to generate low-resolution image metadata and an index of the low-resolution image metadata by analyzing the second image,

wherein the imaging device performs:

a first process for storing the first image in the high-resolution image storage; and

a second process for converting the first image into the second image and transmitting the second image to the video management server by the processor of the imaging device, and

wherein the first process and the second process at least partially overlap each other,

wherein the processor of the video management server is further configured to:

receive, from an external device, an information request signal;

determine whether information corresponding to the information request signal is included in the second image; and

determine whether the information corresponding to the information request signal is included in the first image when it is determined that the information corresponding to the information request signal is not included in the second image.

15. The video management system of claim 14 , wherein the low-resolution image metadata comprises at least one of a point in time when a person appears in the second image, a point in time when an object appears in the second image, a type of the object, a point in time when a sound is produced, and a type of the sound.

16. A video management method of managing a captured image by using a video management system comprising an imaging device and a video management server, the video management method comprising:

generating, by the imaging device, a first image at a first resolution;

storing, by the imaging device, the first image;

converting, by the imaging device, the first image into a second image having a second resolution that is lower than the first resolution;

transmitting, by the imaging device, the second image to the video management server;

storing, by the video management server, the second image;

generating, by the video management server, low-resolution image metadata and an index of the low-resolution image metadata by analyzing the second image;

receiving, by the video management server from an external device, a request to provide information;

determining, by the video management server, whether information corresponding to the request is included in the second image; and

determining, by the video management server, whether the information corresponding to the request is included in the first image when it is determined that the information corresponding to the request is not included in the second image.

17. The video management method of claim 16 , further comprising:

transmitting, by the video management server to the imaging device, a transmission signal requesting the imaging device to provide the information corresponding to the request to the external device.

18. The video management method of claim 17 , further comprising:

transmitting, by the video management server, the information corresponding to the request to the external device when it is determined that the information corresponding to the request is included in the second image; and

transmitting, by the imaging device, the information corresponding to the request to the external device in response to receiving the transmission signal.

19. A video management system comprising:

an imaging device configured to generate a first image at a first resolution; and

a video management server configured to store a second image obtained by converting the first image,

wherein the imaging device comprises:

a high-resolution image storage configured to store the first image;

a processor configure to:

convert the first image into the second image having a second resolution that is lower than the first resolution; and

transmit the second image to the video management server,

wherein the video management server comprises:

a low-resolution image storage configured to store the second image;

a processor configured to:

receive, from an external device, a request to provide information corresponding to the second image;

determine whether information corresponding to the request is included in the second image, and when the information corresponding to the request is not included in the second image, to transmit, to the imaging device, a transmission signal requesting the imaging device to provide the information corresponding to the request to the external device; and

provide the information corresponding to the request to the external device when the information corresponding to the request is included in the second image, and

wherein the imaging device is further configured to, in response to receiving the transmission signal, transmit information corresponding to the transmission signal to the external device.