The NCT includes 4 External validity indices and 8 internal validity indices, and the sub-routine validity_Index.m is designed to use them. This tool is suitable for the research work such as the performance comparison of different indices on est

分别在直角坐标系、极坐标系下，对在电脑上画出的手的剪影做插值，构建出手的轮廓-Respectively, in Cartesian coordinates, polar coordinates, to draw on the computer interpolate hand silhouette, building shot profile