Hyperspectral imaging dataset of potato plants exposed to water-deficit condition

An experiment: Greenhouse experiment under controlled environmental conditions. Conducted at the Agricultural Institute of Slovenia (Ljubljana, Slovenia). From April to August 2021. A night/day temperature of 21 °C/15 °C; relative humidity of 60%, and photoperiod of 14h. 28 cultivars of KIS Krka and 18 of KIS Savinja grown from tubers in 5-litre pots. 5 weeks after planting, half plants of both cultivars were randomly assigned to either water-deficient or well-watered groups. The water-deficient group was exposed to a limited water irrigation regime, i.e., up to 50% of substrate saturation field capacity. The soil moisture was surveilled using tensiometers (14.04.04 Jett Fill tensiometers, Eijkelkamp, Giesbeek Netherlands). Throughout the duration of the experiment, the matric potential of the soil was maintained within the range -0,01 MPa to -0,025 MPa for well-watered plants, and -0,05 MPa to -0,07 MPa for water-deficient plants. Hyperspectral imaging: Every week after the deficit was introduced. Total of 5 imaging sessions were performed. The imaging sessions took place in a dark room, where cameras were positioned at a 3 m distance from the potato plants, together with calibrated halogen lamps. Hyperspectral images were acquired in the VNIR (visible to near infrared) and SWIR (short-wave infrared) spectral regions. Hyspex (Norsk Elektro Optikk, Oslo Norway) push-broom cameras VNIR-1600 (400–988 nm, 160 bands, bandwidth 3.6 nm) and SWIR-384 (950–2500 nm, 288 bands, bandwidth 5.4 nm) were used. Files: File structure: 📂 imagings ├── 📁 imaging-1 │ ├── 📄 0_1_0__KK-K-04_KS-K-05_KK-S-03__imaging-1__1-22_20000_us_2x_HSNR02_ 2022-05-11T104633_corr_rad_f32.hdr │ ├── 📄 0_1_0__KK-K-04_KS-K-05_KK-S-03__imaging-1__1-22_20000_us_2x_HSNR02_2022-05-11T104633_corr_rad_f32.img │ └── 📄 ... ├── 📁 imaging-2 │ └── 📄 ... ├── 📁 imaging-3 │ └── 📄 ... ├── 📁 imaging-4 │ └── 📄 ... └── 📁 imaging-5 └── 📄 ... Description of a name: A_B_C__L1_L2_L3__imaging-X__ID.img -> image file A_B_C__L1_L2_L3__imaging-X__ID.hdr -> header file belonging to an image file A - index of original raw hyperspectral image B - index of an object on the image (of a particular potato plant) C - index of slice extracted from the image L - labels of plants on the image X - index of the imaging session ID - string identifier Description of labels (L): V-T-N (e.g. KK-K-04) V - variety (KK - KIS Krka or KS - KIS Savinja) T - treatment (K - control or S, drought) N - index of a particular plant Image properties: Width of the image: 64 Height of the image: 64 Number of spectral bands: 448 Spectral range: 410nm - 2510nm Image values are expressed in reflectance Additional links: Code where the dataset was used for the entire analysis could be found here: https://github.com/Manuscripts-code/Potato-plants-drought--plants-2024### 实验概况 本实验为可控环境温室实验（Greenhouse experiment under controlled environmental conditions），于斯洛文尼亚卢布尔雅那的斯洛文尼亚农业研究所开展，实验周期为2021年4月至8月。实验环境参数设置如下：昼夜温度分别为21℃/15℃，相对湿度60%，光周期14小时。 实验采用28个KIS Krka品种与18个KIS Savinja品种的马铃薯块茎，种植于5升规格的花盆中。植株种植5周后，将两个品种的各半数植株随机划分为缺水胁迫组与正常供水组。其中缺水胁迫组采用限水灌溉制度，仅维持基质饱和田间持水量的50%。实验使用张力计（tensiometers，14.04.04型Jett Fill张力计，Eijkelkamp公司，荷兰吉斯贝克）监测土壤湿度。整个实验周期内，正常供水植株的土壤基质势维持在-0.01 MPa至-0.025 MPa区间，缺水胁迫组则维持在-0.05 MPa至-0.07 MPa区间。 ### 高光谱成像（Hyperspectral imaging） 于施加水分胁迫后每周开展一次成像，共计5次成像会话。成像操作在暗室中进行，相机与马铃薯植株间距为3米，搭配经校准的卤素灯。高光谱图像采集覆盖可见-近红外（VNIR, Visible to Near Infrared）与短波红外（SWIR, Short-Wave Infrared）两个光谱区域，使用两款Hyspex推扫式相机（push-broom cameras，挪威奥斯陆Norsk Elektro Optikk公司生产）：VNIR-1600（光谱范围400–988 nm，共160个波段，带宽3.6 nm）与SWIR-384（光谱范围950–2500 nm，共288个波段，带宽5.4 nm）。 ### 文件结构 数据集根目录包含`imagings`文件夹，其下分设`imaging-1`至`imaging-5`五个子文件夹，每个子文件夹内存储对应成像会话的图像文件与头文件： - 图像文件命名格式：`A_B_C__L1_L2_L3__imaging-X__ID.img` - 对应头文件命名格式：`A_B_C__L1_L2_L3__imaging-X__ID.hdr` #### 文件命名字段说明 1. `A`：原始高光谱图像的索引 2. `B`：图像内目标对象（特定马铃薯植株）的索引 3. `C`：从图像中提取的切片的索引 4. `L1/L2/L3`：图像内植株的标签 5. `X`：成像会话的索引 6. `ID`：字符串标识符 #### 标签（L）格式说明 标签采用`V-T-N`格式，例如`KK-K-04`： - `V`：品种代号，其中`KK`代表KIS Krka，`KS`代表KIS Savinja - `T`：处理方式代号，`K`为对照组（正常供水），`S`为干旱胁迫组 - `N`：特定植株的编号 ### 图像属性 单幅图像的宽度为64像素，高度为64像素，总光谱波段数为448，光谱覆盖范围为410 nm至2510 nm，图像数值以反射率（reflectance）表示。 ### 附加资源 用于该数据集完整分析的代码可通过以下链接获取： https://github.com/Manuscripts-code/Potato-plants-drought--plants-2024