A recognition method of space visible target based on feature regions

A robust watermarldng algorithm is proposed in feature region of digital image,and here,all secret information is embedded in the region determined by the key points and Contour tracking,which enhance the uncertainty of watermark embedding position and robustness.

Firstly,the steady feature points are extracted from the host image by using SIFT;then the size and orientation of each local feature region are determined adaptively according to its feature scale and orientation.

Analysis of characteristic zones of isothermal superplastic welded joint of heterogeneous steels;

This paper researches several kinds of proposed classification methods of characteristic zones about fusion welded joint.

A new view of characteristic zone of fusion welding joint is put forward through observations and researches of many fusion welding joints.

An original image is divided into non-overlapped blocks, fractal dimension is used to analyze the contents of the image blocks, and the feature blocks which contain edges and textures are selected and then are classified into three different parts: edges, weak textures and strong textures by variance characteristics.

Trends of summer precipitation and its regional characteristics in Liaoning Province,China during 1961-2004;

Research on the Regional Characteristics in the Content of Plastid Pigmen in Hunan Tobacco Leaf

The fusion method of regional features based on wavelet coefficient ma- trices was adopted for the subimage.