Petroglyph G20, Khatm Al Melaha, Kalba, Sharjah

Natural Version with Paint, Petroglyph G20, Khatm Al Melaha, Kalba, Sharjah. Two animals in an unusual style. likely Neolithic or earlier. [Fossati 2019 Messages from the Past: Rock Art of the Al-Hajar Mountains (Oman)]. Khatm Al Melaha is an archaeological site on the coast of the Oman Sea near Kalba in Sharjah, UAE. It is one of the largest rock art sites in the UAE. Over 175 stones with petroglyphs were documented and close to 400 motifs were identified. Every rock with a glyph was given an ID number and a GPS coordinate. In total 25455 terrestrial photographs, 5244 drone photographs, 44 drone videos, and 182 GPS points (+/- 1cm) were done in a single day. Petroglyphs were identified using Radiance Scaling in Meshlab, materials lighting in Substance Painter, and by changing conditions in Sketchfab. Some carvings were completely invisible when viewing. Drawings were done only when a line could be identified using one of these techniques. Reality Capture and Substance Painter Source: Objaverse 1.0 / Sketchfab彩绘自然版本，岩画G20，位于阿联酋沙迦市卡尔巴的哈特姆·阿尔·梅拉哈（Khatm Al Melaha）。以非常规风格绘制的两只动物，年代大概率为新石器时代或更早。[引自Fossati 2019年《来自过去的讯息：哈杰尔山脉（阿曼）的岩画》] 哈特姆·阿尔·梅拉哈是一处位于阿联酋沙迦卡尔巴附近阿曼海沿岸的考古遗址，也是阿联酋境内规模最大的岩画遗址之一。 该遗址已记录超过175块带有岩画的石材，识别出近400个岩画母题。每一块带有刻画图案的岩石均被赋予唯一编号与GPS坐标。本次数据采集单日共完成25455张地面摄影照片、5244张无人机航拍照片、44段无人机航拍视频，以及182个精度达±1cm的GPS测量点。 研究团队通过网格实验室（MeshLab）中的辐射缩放（Radiance Scaling）功能、物质画家（Substance Painter）的材质光照调节，以及Sketchfab的场景条件调整来识别岩画。部分岩刻在常规视角下完全不可见，仅当通过上述任一技术可识别出轮廓线条时，才会进行绘图记录。 实景建模（Reality Capture）与Substance Painter 数据集来源：Objaverse 1.0 / Sketchfab