Petroglyph G22, Khatm Al Melaha, Kalba, Sharjah

DStretch Version, Petroglyph G22 Khatm Al Melaha, Kalba, Sharjah. Several poorly defined anilmals and designs. 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 / Sketchfab本数据集对应DStretch工具版本，岩画（Petroglyph）G22，位于阿联酋沙迦市卡尔巴的Khatm Al Melaha遗址。遗址内可见若干轮廓模糊的动物与纹饰图案，年代大概率属新石器时代或更早。[引自Fossati 2019年《来自过去的讯息：哈杰尔山脉（阿曼）岩画》] Khatm Al Melaha是坐落于阿联酋沙迦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。 本次共记录175余块带有岩画的岩石，识别出近400个纹饰母题。每一块承载岩画的岩石均被分配唯一标识编号与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。 岩画识别工作借助了MeshLab软件中的光线缩放（Radiance Scaling）技术、Substance Painter软件的材质光照功能，以及Sketchfab平台的场景条件调整功能完成。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轮廓线条时，才会进行绘图记录。 实景建模（Reality Capture）与DStretch工具 数据集来源：Objaverse 1.0 / Sketchfab