Color data (RGB) of IODP Hole 386-M0088A@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源自国际大洋发现计划（International Ocean Discovery Program, IODP）386航次（日本海沟古地震学研究）上述钻孔的陆上作业阶段获取的拆分岩芯段。386航次的陆上作业于2022年2月14日至2022年3月15日在“地球号”（D/V Chikyu）钻探船上开展。对岩芯段完成纵向拆分后，使用三轴传感器岩芯测井仪（Tri-Sensor Core Logger, TSCL; NS Design）对存档半段岩芯拍摄高分辨率（100像素/厘米）图像。该相机可生成16位红绿蓝（RGB）色彩（总位深48位）的TIFF文件，据此以1毫米的沿岩芯深度分辨率提取RGB数据。针对每个岩芯段的处理流程如下：1）打开线扫描所得的全分辨率TIFF文件，并将各色彩通道的数值缩放至0-255区间；2）按照顶部（2475像素）和底部（2470像素 + 岩芯段长度 × 分辨率）对TIFF文件进行裁切；3）沿岩芯向下的每一行像素，在岩芯中心宽度450像素（约4.5厘米）范围内对R、G、B通道数值取平均，并将所得数据整理为包含该钻孔所有岩芯段的汇总表格；4）对于每个深度区间，若在线扫描图像中观测到海绵附着区域，则删除对应位置的R、G、B数据；5）同时删除每个岩芯段顶部和底部约1厘米范围的R、G、B数据，以排除可能存在的岩芯间隙或衬管残留影响。[...]