问HN：Fit3d是如何工作的？
我想制作自己版本的 fit3d，这款 3D 身体扫描应用。部分原因是它对我来说太贵，部分原因是为了满足我自己的使用需求。我认为像 Meshroom 这样的开源软件可以用来获取 3D 点云，但我找到的最适合单独扫描自己的使用案例是：站在一个可以旋转 360° 的转盘上（这并不实用）。fit3d 是否需要从头开始构建一切，开发一个定制的摄影测量工具，例如基于这个链接的内容：https://ethz.ch/content/dam/ethz/special-interest/baug/igp/photogrammetry-remote-sensing-dam/documents/pdf/math-of-photogrammetry.pdf？
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So, I want to make my own version of fit3d , the 3d body scanning app. Partly because it too expensive for me and partly to match my desired use. I thought opensource software like meshroom could be used to get a 3d point cloud, but the best use case I could find for scanning yourself alone was: standing still on a turntable that gets rotated 360° (not practical). Did fit3d have to build everything from ground up, a custom built photogrammetry tool, by building upon, for example https://ethz.ch/content/dam/ethz/special-interest/baug/igp/photogrammetry-remote-sensing-dam/documents/pdf/math-of-photogrammetry.pdf ?