Remote image monitoring method and system, and recording medium used for executing image monitoring

• US 6,239,833 B1
• Filed: 03/10/1999
• Issued: 05/29/2001
• Est. Priority Date: 03/18/1998
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Egi, Hiroshi, Ozaki, Nobuyuki
• Primary Examiner(s): Kelley, Chris
• Assistant Examiner(s): VO, TUNG T
• Application Number:
  US09/265,389
• Time in Patent Office: 811 Days
• Field of Search: 348/142, 348/143, 348/149, 348/150, 348/152, 348/153, 348/154, 348/159, 348/160, 348/170, 348/17, 382/133, 244/161
• US Class Current: 348/159
• CPC Class Codes: H04N 23/63 by using electronic viewfinders
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 7/188 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

Abstract

A camera control unit selectively receives an image signal from at least one of a plurality of TV cameras in accordance with an operation signal sent from a monitoring PC over the Internet, compresses the image signal to a digital image, and transmits the compressed digital image to the monitoring PC and a monitor support apparatus over the Internet. The monitoring PC decodes the digital image sent over the Internet, displays the decoded image on a display, and monitors an object to be monitored. The monitor support apparatus successively saves the digital images sent over the Internet, and detects a condition variation of a specific region on the basis of the saved digital images.

Claims

1. A remote image monitoring system for monitoring an object with use of a plurality of TV cameras, comprising:

a camera control unit for selectively receiving an image signal of at least one of the TV cameras, compressing the image signal to a digital image, and transmitting the compressed digital image over the Internet;

a monitoring computer for decoding the digital image sent over the Internet, displaying the decoded image on a display, and monitoring the object; and

a monitor support apparatus for successively saving the digital images sent over the Internet and detecting a condition variation of a specific region from the saved digital images, wherein the monitor support apparatus includes

a database apparatus for successively saving the digital images transmitted over the Internet; and

an intelligent function apparatus for detecting the condition variation from a current latest image saved in the database apparatus and an immediately previous image, wherein the intelligent function apparatus includes

movement vector calculation means for calculating movement vectors of the current latest image and the immediately previous image;

suppress function means for determining whether the movement vectors vary due to an operation of the TV camera, and if not, outputting a detection instruction;

virtual master image storage means for storing in advance a normal-state image of a region of the object; and

condition variation detection means for detecting the condition variation of the specific region from the normal-state image stored in the storage means and one of the current latest image and the immediately previous image, when the detection instruction has been received.

2. The system according to claim 1, wherein the intelligent function apparatus further includes:

message issue means for issuing a message when the condition variation detection means has detected the condition variation in the specific region; and

storage means for storing data associated with the condition variation when the condition variation has been detected in the specific region.