Color data (RGB) of IODP Hole 386-M0092D@en

Color data obtained from split core sections from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology) during the onshore phase. The onshore phase of expedition 386 took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting of the core sections, high-resolution (100 pixels/cm) images of archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue (RGB) color (48-bit) TIFF file from which the RGB data were derived in 1 mm down-core resolution. For each section: 1) the TIFF file (from line scanning) full resolution was opened and channels scaled to 0-255; 2) TIFF file cut at top (2475 px) and bottom (2470 px + length of the section x resolution); 3) for every line of pixel down section, R, G, B values were averaged over a width of 450 px across the centre of the section (\~4.5 cm width) and data placed into a table compiling all sections of a hole; 4) for every depth interval, where a piece of sponge was observed on the linescan, R, G, B data were deleted; 5) R, G, B data were also deleted to the top and bottom ~1 cm of each section, to account for possible gaps or pieces of liner. […]本数据集的颜色数据采自国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震研究）指定钻孔的分劈岩心段，采集于该航次的陆上处理阶段。386航次的陆上处理阶段于2022年2月14日至2022年3月15日在钻探船“地球号”（D/V Chikyu）上开展。在对岩心段进行纵向劈分后，研究人员使用三传感岩心测井仪（Tri-Sensor Core Logger, TSCL；NS Design）对存档半岩心拍摄了分辨率为100像素/厘米的高分辨率图像。该相机可生成16位红绿蓝（RGB）色彩模式（总比特率48位）的TIFF格式文件，研究人员由此以1毫米的岩心纵向分辨率提取RGB色彩数据。针对每个岩心段，具体处理流程如下：1) 打开线扫描得到的TIFF原始分辨率文件，并将各色彩通道的数值归一化至0-255区间；2) 对TIFF文件进行裁切：顶部裁切至2475像素，底部裁切至（2470像素 + 岩心段长度 × 分辨率）；3) 沿岩心纵向的每一条像素行，对岩心中心区域（宽度约4.5厘米，即450像素宽度）内的R、G、B数值取平均值，随后将数据整合为包含该钻孔所有岩心段的表格；4) 若在线扫描图像中某一深度区间存在海绵残体，则删除该区间对应的RGB色彩数据；5) 同时删除每个岩心段顶部和底部约1厘米范围内的RGB数据，以规避岩心衬管残留或间隙可能带来的干扰。[…]