This paper introduces the two-point crossover based genetic algorithm to the digital watermarking technology to reduce the damage produced by the embedding to the greatest degree.

The construction and support at tunnel intersection are introduced,and provides the solvent for the construction way and problem in intersection,which can provide a reference and sprend for the safe construction.

In order to solve this problem,based on the engineering case at the solid crossed intersection of single engine roadway and water.

The successful application of bolting and shotcreting with wire mesh in the big intersection construc- tion in Haizi Coal Mine,which provides good support example for big section road with soft rock and offers a certain value on the spreading and use.

For the first frame of the video, the object edge is obtained by an enhanced interactive method; in the remaining frames of the video, a new Snake algorithm is proposed to detect the sharp-angled and concave object contour under the constraint of zero-crossing point, the experimental results of different.

The traditional method which uses a threshold to every zero-crossing points to detect salient edges by LOG operator,can filter parts of unconspicuous edges caused by noise,but it can also filter the weak edges connecting to salient edges.