Tinavi Medical Technologies Co., Ltd.

Transport Planning and Research Institute Ministry of Transport

Yun Feng

Jin Xu

Chen Wang

Wei Tian

Chen Shen

Jun Huang

Jun Hao

Yue Qi

Yinyan Li

Hanbing Sun

Wentao Ding

Haiyuan Yao

Yajun Liu

Yaping Mao

Provided is an optical tracking tool for navigating a surgery, comprising a mounting base. The mounting base is provided with two to six supporting faces thereon. Two or four reflective balls are arranged on each of the supporting faces. A positioning surface is formed by the four reflective balls located on the same supporting face or the four reflective balls respectively located on two adjacent supporting faces. An included angle between surface normal vectors of two adjacent positioning surfaces is 90&#xb0;-140&#xb0;. As compared with a tracking tool having a single positioning surface formed by four reflective balls in the prior art, the optical tracking tool can considerably broaden an effective tracking range of a system, thereby improving system accuracy.

Optical tracking tool for navigating surgery

A method of extracting an image of a port wharf through multispectral interpretation includes: first, extracting a blurred coastline by assigning values to grayscale values; then, performing a smoothing and noise removal processing on a remote sensing image in a targeted area to extract edge information; sequentially, establishing a multispectral database of a targeted port wharf; and extracting a port wharf using a projected eigenvector, performing an MAF transformation on the regularized kernel function again, projecting multivariate observed values to original eigenvectors, and identifying a remote sensing image area corresponding to the original eigenvector smaller than a transformation variance as a port wharf to be extracted, and then carrying out a validation operation.

Method of extracting image of port wharf through multispectral interpretation

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Beijing, China

Yun Feng