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，岩画（Petroglyph）V21 哈特姆·阿尔·梅拉哈（Khatm Al Melaha），卡尔巴，沙迦。岩画主题为努比亚羱羊（Nubian Ibex），年代推测为新石器时代或更早。[引自Fossati 2019年《来自往昔的讯息：哈贾尔山脉（阿曼）岩画》] 哈特姆·阿尔·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，亦是阿联酋境内规模最大的岩画遗址之一。 本次研究共记录175余块带有岩画的石块，识别出近400个岩画纹样。每一块带有雕刻的岩石均被赋予唯一标识编号与GPS坐标。单日累计完成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。 本次岩画识别采用了MeshLab中的亮度缩放法（Radiance Scaling）、Substance Painter的材质光照调节，以及Sketchfab的场景条件调整技术。部分岩刻在常规检视视角下完全不可见，仅当通过上述任一技术可识别出线条轮廓时，方可开展绘图记录。 实景建模（Reality Capture） 数据来源：Objaverse 1.0 / Sketchfab