Performance of multi camera views’ detection using MPEG-7 visual signature tools

The paper presents experimental results for the detection of related video streams (views) of multi camera system using MPEG−7 visual signature tools. This detection can be used for identification of video streams stored in video repositories which constitute the same multi camera recording set. Two signature tools have been investigated: Image Signature descriptor and Video Signature descriptor. The motivation for the usage of the tools designed primarily for replica detection is the fact that the video material produced by multi camera system typically consists of a few related video streams which are similar to each other and, thus, the video streams produced by multi camera system can be regarded as semi−replicas as they contain predominantly the same scenes or objects recorded at the same time. Experiments show that only in some restricted scenarios of a multi camera system setup the MPEG−7 visual signature tools can be used for reliable detection of multi ca− mera views. These reliable scenarios include systems having cameras with perpendicular optical axes and “far” scene.