Petroglyph J25 Khatm Al Melaha, Kalba, Sharjah

DStretch Version, Petroglyph J25 Khatm Al Melaha, Kalba, Sharjah. Three wild asses and a probable anthropomorph. 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 DStretch Source: Objaverse 1.0 / SketchfabDStretch版本，岩刻编号J25，位于阿联酋沙迦州卡尔巴的哈特姆·阿勒·梅拉哈（Khatm Al Melaha）。该遗存包含三只野驴与一处疑似拟人形象，年代大概率为新石器时代或更早。[引自Fossati 2019《来自过去的讯息：哈杰尔山脉（阿曼）的岩画艺术》] 哈特姆·阿勒·梅拉哈是坐落于阿联酋沙迦州卡尔巴附近阿曼海沿岸的考古遗址，亦是阿联酋境内规模最大的岩画遗址之一。 该遗址共记录175余块带有岩刻的石块，识别出近400个岩刻母题。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。 研究团队通过在MeshLab中应用亮度缩放（Radiance Scaling）技术、在Substance Painter中调整材质光照，以及在Sketchfab中更改渲染条件来识别岩刻。部分雕刻在常规观测视角下完全不可见，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。 数据处理涉及Reality Capture与DStretch。 数据来源：Objaverse 1.0 / Sketchfab