用手持对焦堆叠和镜面系统，实现蝴蝶标本全视角高清3D重建。
Practical High-Fidelity Novel-View Synthesis of Mounted Lepidoptera
- 手持对焦堆叠+非接触镜面，解决微小脆弱标本拍摄难题。
- 无需支架即可获得全焦深宏图，镜面反射信息被精准建模。
- 无需分割，直接重建出高保真3D模型，适合生物标本数字化。
pinned butterfly 标本是自然历史收藏中最具视觉冲击力的物体之一。然而，由于其体型微小且脆弱，表面覆盖微观毛发与翅脉结构，三维数字化极具挑战：需使用微距镜头，但景深极浅；同时，相机无法从下方绕行拍摄腹面（翅膀下表面）。为此，本文提出一个端到端管道，将这些标本转化为可任意视角观看的逼真3D模型。该方法结合三项核心技术：无需三脚架的手持对焦堆叠技术，实现全焦深宏图采集；非接触式第一表面镜系统，无损暴露腹面；以及一种无需分割、能感知镜面反射的3D高斯溅射扩展。在四类不同标本上验证了重建效果，结果表明模型具有高度保真度。
原文摘要 · Abstract (English)
Mounted butterflies are among the most striking objects in natural history collections. However, their beauty is notoriously hard to digitize in 3D: they are small and fragile, with microscopic hairs and vein structures. Capturing them in sufficient detail, therefore, requires a macro lens, which has a very limited Depth of Field (DoF). Moreover, a camera body cannot be maneuvered beneath a pinned specimen to photograph its ventral surface (the underside of the wings). We introduce an end-to-end pipeline that resolves these challenges to turn such specimens into photo-realistic 3D models viewable from every direction. It combines three ingredients: handheld focus stacking for all-in-focus macro capture without a tripod, a non-contact first-surface mirror system that exposes the ventral surface without touching the specimen, and a segmentation-free, mirror-aware 3D Gaussian Splatting extension. We validate the reconstructions on four diverse specimens.
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