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A comment on Show HN: MTailor – Get measured by your iPhone's camera for a custom shirt. Parent comment

Re:Show HN: MTailor – Get measured by your iPhone's camera f... by mpenn on Saturday July 26, 2014 @06:29PM (#8091054)
Ok, some more of the statistics on the 20% number.

We had each tailor measure each person across 17 different measurements. Across those 4 tailors (on each person and each measurement), you could see a standard deviation. So then we also looked at the standard deviation of the average of those 4 tailors vs. the MTailor software's system. Our standard deviation was 20% lower.

Happy to go into even more detail if people are interested!

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Re:Show HN: MTailor – Get measured by your iPhone's camera f... by dloman on Saturday July 26, 2014 @07:02PM (#8091154)
Looks like a really cool product. Are you thinking of moving to android? Don't mean to nit pick but you are mixing up accuracy and precision. If your standard of deviation is 20% lower, then you are more precise then professional tailors. Accuracy denotes some distance from some "true" value. Accuracy != Precision http://en.wikipedia.org/wiki/Accuracy_and_precision
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Re:Show HN: MTailor – Get measured by your iPhone's camera f... by mpenn on Saturday July 26, 2014 @07:28PM (#8091242)
Definitely planning on Android (but not for a few months).

You're definitely right about precision vs. accuracy. The phrase never polled as well. Maybe if we'd run our surveys in the statistics department it would have been different. :-)

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Re:Show HN: MTailor – Get measured by your iPhone's camera f... by jrockway on Saturday July 26, 2014 @07:41PM (#8091293)
Regardless of what polls tell you, calling precision accuracy is inaccurate.
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Re:Show HN: MTailor – Get measured by your iPhone's camera f... by rahimnathwani on Saturday July 26, 2014 @09:51PM (#8091670)
I'd love to know more detail, if you can share it without spilling the secret sauce.
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Re:Show HN: MTailor – Get measured by your iPhone's camera f... by mpenn on Sunday July 27, 2014 @05:57AM (#8092361)
From the video, we build a full 3D scan of you (lots of math / machine learning here). Then we essentially take a digital tape measure to your 3D scan.
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