This function(s) can be used to interactively view any kind of 3D image volumes like CT and MRI, and for distance measurements or ROI selection in 2D slices.

交互式可视化图画；vtk，六角体，可放大小-ROI visualization，vtk，zoom inout

调入ROI和遥感影像，根据ROI生成三维散点图，能够手工选择波段显示。-generate the 3-D scatter diagram