<正>结合了全装修住宅建设的实际，分析了传统家庭装修行业的产业特征及所面临的问题；以住宅室内设计的3个特点为基础，对全装修住宅进行了策略分析，讨论了通过设计定位方法解决住宅全装修中的各种问题，并阐述了室内设计师在住宅全装修活动中的地位和作用。

According to the thorough research of computerized tomography (CT) in medical field, there are different scan methods for different kind of objects. There isn’t any interval between two topographies. The CT image processing software is usually applied in a workstation. When CT is used into the wood industry, in order to improve efficiency and reduce cost, the interval between two topographies is expected so that the data of CT image can be reconstructed by PC. However, the research about this method of interval and interpolation hasn’t been reported yet. This article, based on the reconstruction of three-D data by cubic natural spline function, compares the data got by using interval interpolation and that got without interval, and the result doesn’t show much difference between these two groups of data. The application of cubic natural spline function can reconstruct three-D data and thus improve efficiency and lower cost.