Andy Perrin Posted February 23 Share Posted February 23 First Cambridge Church, Harvard Square, in Massachusetts, US. The image is a LWIR panorama. Technical details: 69 image panorama, each image was 320x240 pixels Camera: FLIR E60 Lens: FLIR 15 degree AFOV germanium lens The images were stitched together, ragged edges were filled in with Photoshop Content Aware Fill (so, that means some tree branches are not real), then details were brought out using the Aurora 2019 HDR software, and sharpened using Topaz Sharpen. Link to comment
Doug A Posted February 24 Share Posted February 24 Fabulous image! I've never seen a FLIR image anywhere near this detailed and sharp. 69 shot pano is a lot of time & work. In this case it was worth it. Thanks for sharing, Doug A Link to comment
Andy Perrin Posted February 24 Author Share Posted February 24 It wasn’t too bad - I took all 69 photos in ten minutes that I was waiting for the bus, and they stitched very quickly because of the low resolution of each individual image. Link to comment
Nate Posted February 24 Share Posted February 24 Nice Andy! Curious what the structure is made out of. I don't see any supporting beams showing through from temp difference. Link to comment
Andy Perrin Posted February 24 Author Share Posted February 24 1 hour ago, Nate said: Nice Andy! Curious what the structure is made out of. I don't see any supporting beams showing through from temp difference. What do you mean? I can see them clearly? Here's some of them marked for you: Link to comment
Kai Posted February 24 Share Posted February 24 A really astonishing result. Great work!!! Link to comment
Nate Posted February 24 Share Posted February 24 9 hours ago, Andy Perrin said: What do you mean? You're right I see them now. I was thinking the beams would be larger. Link to comment
bobfriedman Posted February 24 Share Posted February 24 nice work.. a pano success. does that cam cover the full 8-14 um band? Link to comment
Andy Perrin Posted February 24 Author Share Posted February 24 Bob - yes to 8-14 micron band roughly. Since it's a micro-bolometer-based sensor, which works by detecting the temperature change of a suspended bit of semiconductor, it technically will react to the entire spectrum up to UV even, but there is a germanium lens on the front which restricts the spectral range to begin at 2 microns and end at 16 microns. The temperature of the surroundings means that at 20deg C, 80% of the available light tends to be in the 7.5-30 micron band. Put the two together and you have the effective range of the camera, give or take a little, as 7.5-16 microns. Different manufacturers will list slightly different endpoints, and I'm not sure if there is any additional filtration, but those are the dominant considerations. -- Now, speaking of supporting beams, let me point out that there is an entire "ghost" window if you look carefully. I have pushed the contrast a lot here with the Photoshop curves tool to make it more obvious, including dodge/burning it: Link to comment
Stefano Posted February 24 Share Posted February 24 1 hour ago, Andy Perrin said: Bob - yes to 8-14 micron band roughly. Since it's a micro-bolometer-based sensor, which works by detecting the temperature change of a suspended bit of semiconductor, it technically will react to the entire spectrum up to UV even, but there is a germanium lens on the front which restricts the spectral range to begin at 2 microns and end at 16 microns. The temperature of the surroundings means that at 20deg C, 80% of the available light tends to be in the 7.5-30 micron band. Put the two together and you have the effective range of the camera, give or take a little, as 7.5-16 microns. Different manufacturers will list slightly different endpoints, and I'm not sure if there is any additional filtration, but those are the dominant considerations. This is something I have been thinking about for a while. Microbolometers can be heated by light of essentially all wavelengths (at least in the optical region), so in theory it should be possibile to make a SWIR camera or even a visible light camera by just replacing the lens and/or using filters. Microbolometer-based SWIR and MWIR cameras do exist: https://www.polytec.com/eu/optical-systems/products/special-cameras/ir-cameras-arrays/swir-microbolometer-cameras Then of course microbolometers have their limitations, but in principle you can make them respond to any wavelength you wish, I think. Link to comment
lonesome_dave Posted February 24 Share Posted February 24 This is really nice Andy. Inspires me to try something similar with the low-res imagers I have quite a few of. I'll need to investigate all that post-processing you did to work this magic. Link to comment
Andy Perrin Posted February 25 Author Share Posted February 25 50 minutes ago, lonesome_dave said: This is really nice Andy. Inspires me to try something similar with the low-res imagers I have quite a few of. I'll need to investigate all that post-processing you did to work this magic. Well the most important thing to know is that the FLIR “radiometric JPEG” files in reality contain the raw data in 16bit, and this can be extracted using the Exiftool program. Link to comment
lukaszgryglicki Posted February 26 Share Posted February 26 I even have a program for this - it allows creating images/movies from CSQ files - I've written it myself: https://github.com/lukaszgryglicki/csqconv Link to comment
Andy Perrin Posted February 26 Author Share Posted February 26 That is not quite the same - I am referring to the radiometric JPEGs, which are .jpg files. Link to comment
lukaszgryglicki Posted February 26 Share Posted February 26 OK, right, my program extracts image data from videos saved by camera and saves them as JPG. Link to comment
Andy Perrin Posted February 26 Author Share Posted February 26 Yes, I was referring to STILL images, not videos. Link to comment
Andrea B. Posted February 29 Share Posted February 29 Well done, Andy! Interesting subject which brings out the underlying structure. And impressive processing to get 69 separate images to behave themselves when concatenated. I wonder why that window was covered over? Link to comment
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