Moving object detection is a very significant and difficult problem in processing image sequence acquired by a mobile camera. The objective of this research is to present a novel method to resolve the moving target detection difficulties

which bring by several layers with different motion parameters of the sequence images. Considering a moving camera

it was hard to distinguish different motion layers led by 3D depth difference of immobile objects from those caused by target moving in scene. Firstly

a mixture model of image was proposed

and the method of motion segmentation based this model were suggested. Secondly

the reconstruction method of scene depth

which employed the motion parameters by EM

was presented. Finally

the detail theory and algorithm of new moving target detection approach

which were based on the scene 3D depth reconstruction

were described. The results indicate that the moving targets detected by the new technique are more accurate than those detected by traditional methods. In addition

the detection speed becomes more-much. The results seem to suggest that the new method be able to provide efficiency and accuracy advantages in computer version.