Frustrated about 3D Stuff

General feeling of frustration tonight (time of writing: Friday 5/9).  Hard to put into words.  But I could draw it.  (might need to zoom in)

3d printing roadmap

  • The Green things are things that I have figured out.
  • The Red things are things that definitely have not worked for me.
  • The Yellow Things are things I want to be able to to.
  • The Orange things are things that I haven’t yet figured out.   They depend on each other, there is usually a chain.
  • I forgot about Minecraft Prints.  Those fall under “Color print that I might could afford”, pretty much.

Latest Frustration Tonight

It turns out a Agisoft PhotoScan project file (.PSZ) looks like a ZIP file, with a doc.xml, which has the below structure – so I could write code to hunt through 1420+ images, and select the best 50, spread out.

image

The code looked like this (sorry, no LINQ, going old school here, command line parameters, etc)

image

Except that the PSZ not really a Zip file.  When I tried to stuff the modified doc.xml back into the .PSZ file, it came out as being corrupted.    Dead End?  Retry with 7Z?   Extra metadata?  older compression format? ?

I guess what I have is code that tells “which cameras I should enable”.   That’s workable, except that I need to grab frames/image[@path] so that a human could identify it. 

Future: Maybe I could write code to read the video, figure out the quality of the frames, and only extract the best frames?

Also: the $3000 version of Photoscan has a Python Scripting interface.  Sorry, I’d rather buy a color 3D printer than that.

However, good news, it looks like I might finally have a lens profile for a GoPro Hero3 in 720p (x120FPS) Wide mode.  I had to play with the focal length, for some reason numbers like 0.1mm and 2mm work way better than 7mm that folks advertise.   More to be proven later.

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