Hyperspectral dataset: Ceramic tiles in dry and underwater setting

The objective of this experiment was to observe the changes in spectral information of a calibration tile when placed underwater. For this purpose, the SPECIM IQ hyperspectral camera was used which operates in Visible and near infra-red regions (400-1000nm) with a spectral resolution FWHM of 7nm resulting in 204 bands in a data cube.

To establish a baseline for comparison, data was acquired before submerging the calibration tile into water. Then the tile was immersed in water and data was recorded under two settings i.e., outdoor and indoor. The latter provided a controlled environment where a halogen lamp was used as the light source. Lastly, the tile was removed and data was captured both outside and inside once it had dried off. The data was annotated to enable comparison of similar data points under different conditions.

本实验旨在观测校准瓦片（calibration tile）浸入水中后的光谱信息变化。为此，本研究采用SPECIM IQ高光谱相机（hyperspectral camera），该相机工作于可见光与近红外波段（400~1000nm），光谱分辨率半高全宽（FWHM）为7nm，单个数据立方体（data cube）包含204个光谱波段。

为建立用于对比的基准数据集，实验首先在将校准瓦片浸入水中前采集光谱数据。随后将瓦片浸没于水中，分别在室外与室内两种设置下记录数据：其中室内环境采用卤钨灯作为光源，可提供受控的实验条件。最后将瓦片取出并待其完全干燥后，分别在室外与室内环境再次采集数据。本实验对所有采集到的数据进行了标注，以实现不同条件下同类数据点的对比分析。