【摘要】 CT图像中灰度大小与木材密度成正比。径切面上的木材密度变化不大,但缺陷出现时会有大幅变化。笔者依据以上的木材特性,以欧洲白腊为例利用三次自然样条函数对原木CT扫描三维数据重构,比较了有间隔和没有间隔的函数插值的数据。结果表明:进行原木CT图像采样时,适当的间隔可以提高CT的扫描效率和图像的处理速度,且能降低成本。更多还原

【Abstract】 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.更多还原