3 ms·

I don't think I follow your reasoning about 'real objects'. Real objects can (and usually must) be coated with scanning sprays, like the Aesub Blue the author n

by tofof 6y ago

I don't think I follow your reasoning about 'real objects'. Real objects can (and usually must) be coated with scanning sprays, like the Aesub Blue the author notes in several places that he uses. These sprays then vanish completely from the model after a few hours. The entire point of these sprays is to ensure that your model is covered in features that are perfectly identifiable. The author makes the 10 micron claim in several other places, including https://www.reddit.com/r/photogrammetry/comments/k5dbtk/automated_scaling_accuracy_of_001mm_at_10cm_object/ https://www.reddit.com/r/photogrammetry/comments/k5dbtk/auto... about a totally different model. That thread discusses ways to quantify accuracy and generally agrees that the rig should not be capable of such feats. But then there are images like https://www.reddit.com/r/OpenScan/comments/ls17tt/closeup_of_the_3d_scanned_raspberry_pi_why_is_it/ https://www.reddit.com/r/OpenScan/comments/ls17tt/closeup_of... in which his scans are picking up the silk screening on the surface of the board, which at least lends some credence to the idea that he's getting 10 micron accuracy.

pmiller2 6y ago
This might be a good place to ask, because I've been wondering about this for a while: do any of these scanning sprays react with copper, silver, or gold? I can't ever find an actual ingredients list for them, and all the MSDS ever lists is various hydrocarbons, which I know won't react.
- thomas_OpenScan 6y ago
  Cyclododecan has been the industry standard for vanishing 3d scanning sprays, but as Cyclododecan is no longer available from the textile industry, this kind of spray does not exist anymore. Aesub Blue is a rather new product from a young German company. I have met the founders last year and they are really professional and transparent. Just check out their documentation. To be fair, as the product is so new, possible interactions with materials are still not perfectly understood. But from what I have seen, the feedback from the professional scanning community is very positive.

by tofof 6y ago

pmiller2 6y ago

This might be a good place to ask, because I've been wondering about this for a while: do any of these scanning sprays react with copper, silver, or gold? I can't ever find an actual ingredients list for them, and all the MSDS ever lists is various hydrocarbons, which I know won't react.

thomas_OpenScan 6y ago
Cyclododecan has been the industry standard for vanishing 3d scanning sprays, but as Cyclododecan is no longer available from the textile industry, this kind of spray does not exist anymore. Aesub Blue is a rather new product from a young German company. I have met the founders last year and they are really professional and transparent. Just check out their documentation. To be fair, as the product is so new, possible interactions with materials are still not perfectly understood. But from what I have seen, the feedback from the professional scanning community is very positive.