Dataset of X-ray Computed Tomography Reconstructions of Partially Saturated Vegetated Sand

The dataset contains the raw data of 4 reconstructed images from x-ray computed tomography. The content of the images represents the 4D <em>in-vivo</em> evolution of a vegetated sand microstructure. The pixel size is 60 microns and equal for all the 3D images. The samples are partially saturated, with a relative density of 30%, and Maize root system growing in it (Day 2 and Day 6 post germination). The sand used are two different granulometry of Hostun sand. One set of data refers to Hostun_1.5-2, with D50=1.9mm, the other refers to Hostun_31, with D50=0.33mm.The dataset can be used to recreate the image processing protocol to segment the root system and the soil matrix, as presented in Anselmucci at al, 2021a,b.The data is intended to be used with the purpose to develop an automated root-segmentation tool.

本数据集包含4幅X射线计算机断层扫描（X-ray Computed Tomography）重建图像的原始数据。图像内容展示了植被覆盖砂质微结构的四维（4D）活体（in-vivo）演化过程。所有三维图像的像素尺寸均为60微米且保持一致。实验样品处于部分饱和状态，相对密度为30%，其中生长有玉米根系，分别取自萌发后第2天及第6天的样本。本次实验所用砂材为两种不同粒度级配的霍通砂（Hostun sand）：一组数据对应Hostun_1.5-2级配砂，其中位粒径D50为1.9mm；另一组对应Hostun_31级配砂，其中位粒径D50为0.33mm。本数据集可用于复现Anselmucci等人2021年a、b两篇文献中提出的根系与土壤基质图像分割处理流程，亦可用于开发自动化根系分割工具。