EP 1346330 B1 20130515 - VIDEO SMOKE DETECTION SYSTEM
Title (en)
VIDEO SMOKE DETECTION SYSTEM
Title (de)
VIDEO-RAUCHDETEKTIONSSYSTEM
Title (fr)
SYSTEME DE DETECTION DE FUMEE BASE SUR LA VIDEO
Publication
Application
Priority
- EP 00128606 A 20001228
- CH 19692001 A 20011026
- CH 0100731 W 20011220
- EP 01272590 A 20011220
Abstract (en)
[origin: WO02054364A2] The invention relates to a video smoke detection system comprising at least one device for recording video images (A) and one signal processing step, wherein the illuminosity of a single pixel or a group of pixels in the video images (A) is determined. The illuminosity of the pixel is determined by means of a process wherein a value representing the illuminosity is obtained. The temporal progression of the above-mentioned value is examined for characteristic changes in the presence of smoke. Determination of the illuminosity of the pixel occurs by means of an edge extraction process (5), whereby an edge value is associated with each pixel. The edge extraction process (5) also takes place after examination of the video images (A) for movement, designated as movement detection (7). Determination of the edge values and movement detection (7) occur by means of digital images (6, 8) which are continuously updated by a hysteresis algorithm.
IPC 8 full level
G08B 13/194 (2006.01); G08B 13/196 (2006.01); G08B 17/12 (2006.01)
CPC (source: EP)
G08B 13/19602 (2013.01); G08B 17/125 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02054364 A2 20020711; WO 02054364 A3 20021219; AU 2002220440 B2 20070823; CN 1190759 C 20050223; CN 1406366 A 20030326; EP 1346330 A2 20030924; EP 1346330 B1 20130515; HK 1054457 A1 20031128; HK 1054457 B 20050930
DOCDB simple family (application)
CH 0100731 W 20011220; AU 2002220440 A 20011220; CN 01805721 A 20011220; EP 01272590 A 20011220; HK 03106653 A 20030916