Monitoring method and monitoring device

Patent metadata

Field	Value
Publication number	US-10204419-B2
Application number	US-201615238965-A
Country	US
Kind code	B2
Filing date	Aug 17, 2016
Priority date	Mar 9, 2016
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

The present invention provides a monitoring method and a monitoring device, belongs to the field of electronic monitoring technology, and can solve the problem that useless video data occupies storage space and key video cannot be extracted quickly when an event occurs in the existing monitoring device. The monitoring method of the present invention comprises: determining whether or not a first image is changed; generating a storage instruction if it is determined that the first image is changed; collecting and storing images of external environment according to the storage instruction; obtaining a second image according to the collected images of external environment; determining whether or not the second image is changed; and stopping storing images of external environment if it is determined that the second image is not changed.

First claim

The invention claimed is:

1. A monitoring method, comprising:
determining whether or not a first image is changed;
generating a storage instruction if it is determined that the first image is changed;
collecting and storing images of an external environment according to the storage instruction;
obtaining a second image according to the collected images of the external environment;
determining whether or not the second image is changed; and
stopping storing images of the external environment if it is determined that the second image is not changed,
wherein, determining whether or not the first image is changed comprises:
sequentially obtaining a difference between every two adjacent frames of images among the first image and a plurality of frames of images previous to the first image, and then cumulatively adding the obtained differences to obtain a first target moving dimension;
determining whether or not the first target moving dimension exceeds a first target moving dimension threshold; and
determining the first image is changed if it is determined that the first target moving dimension exceeds the first target moving dimension threshold.

2. The monitoring method according to claim 1 , wherein, before determining whether or not a first image is changed, the monitoring method further comprises:
collecting images of the external environment by way of videotaping, and obtaining the first image according to the collected images of the external environment.

3. The monitoring method according to claim 1 , wherein, sequentially obtaining a difference between every two adjacent frames of images among the first image and the plurality of frames of images previous to the first image and then cumulatively adding the obtained differences comprises:
among the first image and the plurality of frames of images previous to the first image, sequentially comparing a latter frame of image with a former frame of image in every two adjacent frames of images to obtain a difference between pixel brightness values at same positions of the latter frame of image and the former frame of image, and then cumulatively adding the obtained differences to obtain the first target moving dimension.

4. The monitoring method according to claim 1 , wherein, collecting and storing images of the external environment according to the storage instruction comprises:
collecting the images of the external environment by way of both videotaping and photographing, and storing the images collected by way of videotaping and photographing.

5. The monitoring method according to claim 4 , further comprising: stopping using photographing to collect the images of the external environment if it is determined that the second image is not changed.

6. The monitoring method according to claim 4 , wherein, whether or not the second image is changed is determined by using images collected by way of videotaping; and determining whether or not the second image is changed comprises:
sequentially obtaining a difference between every two adjacent frames of images among the second image and a plurality of frames of images previous to the second image, and then cumulatively adding the obtained differences to obtain a second target moving dimension; and
determining whether or not the second target moving dimension exceeds a second target moving dimension threshold; and
stopping storing the images of the external environment if it is determined that the second image is not changed comprises:
stopping storing the images of the external environment if the second target moving dimension does not exceed the second target moving dimension threshold.

7. The monitoring method according to claim 4 , wherein, whether or not the second image is changed is determined by using images collected by way of photographing; and determining whether or not the second image is changed comprises:
whether or not the second image is changed is determined by any one method of sum of absolute values of corresponding pixel differences in an image sequence, sum of squares of corresponding pixel differences in an image sequence, normalized cross correlation, and Census transformation.

8. The monitoring method according to claim 1 , wherein, whether or not the second image is changed is determined by using images collected by way of videotaping; and determining whether or not the second image is changed comprises:
sequentially Obtaining a difference between every two adjacent frames of images among the second image and a plurality of frames of images previous to the second image, and then cumulatively adding the obtained differences to obtain a second target moving dimension; and
determining whether or not the second target moving dimension exceeds a second target moving dimension threshold; and

stopping storing the images of the external environment if it is determined that the second image is not changed comprises:
stopping storing the images of the external environment if the second target moving dimension does not exceed the second target moving dimension threshold.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Jing Yaoqiu
• Zhou Chengqi
• Wang Hong
• Li Shou

Classifications

• G06T7/20 Primary

  Analysis of motion (motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51) · CPC title

• G06T2207/30232

  Surveillance · CPC title

• G06T2207/10016

  Video; Image sequence · CPC title

• H04N5/77 Primary

  between a recording apparatus and a television camera · CPC title

• H04N7/188

  Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position (signal generation from motion picture films H04N5/253) · CPC title