Human Skin Color(HSC) features have been widely used in video moving human positioning. However, in complex background video sequences, due to illumination changes or other moving objects which have similar HSC regions, the effect of moving human positioning is not satisfactory. A new method of moving human positioning applied on complex background video sequences is presented in this paper. Firstly, brightness information of the video sequence images is detected and analyzed based on HSV color model. Secondly, adopt the multi frame subtraction method to extract the moving object regions from motionless background. Then, the regions with distinctive HSC features are separated from other moving objects using the data fusion model of HSC and brightness information. Finally, identify human object among regions with HSC features according to the prior knowledge of human. The experimental results show that the method provided in this paper is effective in moving human positioning of complex background video, and has the strong illumination change adaptability and anti-jamming ability.

The mechanical analysis of a novel plywood formwork structure with steel frame was studied with finite element method systematically. By optimizing the parameters of the section shape, node position and the number of formwork heel, a kind of the optimization design scheme was presented. Less building construction materials and better mechanical property was accomplished by the scheme. By contrasting the optimization results with experimental results, the design method is valuable.