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Thermal IR buildings

LWIR
5 replies to this topic

#1 Andy Perrin

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Posted 07 January 2016 - 05:47

I got a FLIR i7 a few years ago, and since then I've been stitching together pictures of buildings and landscapes. The FLIR camera has a resolution of just 160x120 pixels which are then interpolated. Most of these images were hand-stitched from 30 or more individual pictures; more recently I've gotten better at coaxing Photoshop into doing it for me automagically. All the visible photos were by iPhone, and the near infrared is from my IR-converted iPhone 4.

A local hill that stands over a monastery:
Attached Image: Foster St Hill (visible and thermal IR).jpg

Kenmore Square, Boston, Massachusetts, US. Note the glowing bus shelter! It was a hot summer day.
Attached Image: Kenmore multi-spectral, 7-1-12.jpg

My own apartment last winter (before the snow came):
Attached Image: My apartment and street in IR and visible.jpg

Standing on the fire escape of my apartment. You can really see the errors in the stitching on this one, sorry!
Attached Image: Out back door of apt.jpg

Yawkey station, near Kenmore (above), waiting for the train. Of note here: the advertisement shows up in the thermal because the dark parts absorb sunshine better. If I take thermal IR pictures of advertisements near sunset, I can actually watch the advertisement go blank as the surface approaches uniform temperature.
Attached Image: Yawkey station, thermal (small).jpg

#2 Andrea B.

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Posted 07 January 2016 - 07:02

Absolutely fascinating, Andy. Thanks for posting this!

Great work with all the stitching. That's not easy using such small rectangles. Bjørn has a pano app he recommends which might be an improvement over the PS version. So I hope he sees this thread and mentions it.

Look how hot the street was on that summer day!
Andrea G. Blum
Often found hanging out with flowers & bees.

#3 nfoto

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Posted 07 January 2016 - 10:43

Andrea means PTGui. It is very good. Also capable of handling many image with ease and is lean on its memory consumption. I have sometimes stitched 200+ images each of 60 MB and although the process is *not* instant, not that time-consuming either.

#4 JCDowdy

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Posted 07 January 2016 - 21:22

New vocabulary word, "automagically" :lol:

#5 nfoto

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Posted 07 January 2016 - 21:51

View PostJCDowdy, on 07 January 2016 - 21:22, said:

New vocabulary word, "automagically" :lol:

In reality this is a word used already for a long time ...

#6 Andy Perrin

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Posted 07 January 2016 - 21:58

Yes, it's not my own coinage, but it is a useful addition, JCDowdy!