Resumen:
X-ray computer tomography (CT) is a non-invasive technique for image acquisition. Recent technologicaladvances have enabled reliable and high-resolution images to be obtained. In soil samples, for example, thissubserves the identication of pores and their structure and the analysis of their geometric characteristics.However, the lack of contrast between pores and solids in soil samples makes it difcult to identify the pores, andit poses problems for their connectivity when a three-dimensional (3-D) reconstruction is made from a group ofconsecutive 2-D images obtained with a scanner. To solve this problem, an improved sub-segmentation method,which had been developed and tested previously, was applied in this research to achieve a better identication ofthe pore space and consequently the solid space in the 2-D slices of the image, followed by a 3-D reconstructionof the soil sample. In this study, two soil samples were used, one real soil sample with 255 2-D CT consecutiveimages and a synthetic image with 215 2-D images. The latter sample was used only to evaluate the robustnessof the improved sub-segmentation method and the results from analysis of the pore connectivity in a knownstructure. The ...