Petroglyph V21 Khatm Al Melaha, Kalba, Sharjah.

Natural Version, Petroglyph V21 Khatm Al Melaha, Kalba, Sharjah. Nubian Ibex. 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 Source: Objaverse 1.0 / Sketchfab自然版本，沙迦卡尔巴（Kalba）的哈特姆·阿勒·梅拉哈（Khatm Al Melaha）V21岩画。主题为努比亚羱羊（Nubian Ibex），年代大概率为新石器时代或更早。[引自Fossati 2019年《来自往昔的讯息：哈杰尔山脉（阿曼）的岩画》] 哈特姆·阿勒·梅拉哈（Khatm Al Melaha）是阿联酋沙迦卡尔巴附近阿曼海沿岸的一处考古遗址，同时也是阿联酋境内规模最大的岩画遗址之一。 该遗址已记录逾175块带有岩画的石材，共识别出近400个岩画纹样。每一块带有雕刻的岩石均被分配唯一编号与GPS坐标。单日累计完成25455张地面拍摄照片、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±1厘米的GPS测点。 岩画的识别工作借助MeshLab中的辐射度缩放（Radiance Scaling）、Substance Painter的材质光照调节，以及Sketchfab的场景条件调整完成。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线条时，才会进行绘图记录。 实景捕捉（Reality Capture） 数据来源：Objaverse 1.0 / Sketchfab