Thermal photography
thermal-photography

Thermal infrared cameras are designed to take photos or videos of heat (not to be confused with [near infrared cameras](/wiki/multispectral-imaging)). Some of these are tuned specifically for gases, and can be used to image #methane. ## Applications Thermal imaging can be used to document heat/AC leaks from insulation gaps on a building's facade, reveal warmer ground water inflows (either fresh or chemical-laden) or "thermal pollution" from industrial processes entering ocean-temperature waterbodies, as well as identify areas on the human body experiencing infection or stress (includes epidemiological applications). Specific models of FLIR brand cameras, known as the FLIR GasFinder (http://www.flir.com/ogi/display/?id=55671). See [GasFinder](#gas+finder) below for more. Community applications so far include both a "heat-busters" program in East Harlem and a "forensic" water quality monitoring program in the [Gowanus Canal](/place/new-york-city). ## Questions [questions:thermal-photography] *** ## DIY Approaches There are three Do-It-Yourself prototypes in development to try to do this more cheaply than the off-the-shelf options. These projects were started a few years ago and may not be active: * A **[Thermal Flashlight](/wiki/thermal-flashlight)**: a RGB LED flashlight with a non-contact infrared sensor that "paints" the temperature of the surface directly on the wall for capture with a second timelapse camera. * A [Thermal Fishing Bob](/wiki/thermal-fishing-bob): dragging a thermometer through the water, taking contact measurements mapped to a RGB light, also for capture with a second timelapse camera. * A [scanning thermal camera](/wiki/scanning-thermal-camera) on a LEGO turntable (software also in development) that sweeps back and forth across a scene, recording the temperature variation to build up an image. ## Problem Why make a DIY version? "FLIR" cameras can produce images such as the one below, and are typically used to identify heat leaks, but even low-resolution FLIR cameras can cost thousands of dollars. The goal of these DIY thermal camera projects is to make this kind of investigation (and the potential savings) cheap, easy, fun, and informative for those of us without $10k in our pockets. **** ## Activities [activities:thermal-photography] ...


Author Comment Last activity Moderation
warren "Haha -- http://infragram.org to the rescue! " | Read more » about 10 years ago
donblair "Follow-up -- there's some nice info on IR photodiodes (at least the sort that are in a typical IR remote), here -- including a link to a datasheet...." | Read more » about 10 years ago
donblair "Yay! Yeah, I puzzled a bit over the best geometry of 'emitters and receivers' to use on the device. I have two photodiodes on the board, one of w..." | Read more » about 10 years ago
mathew "The circular layout will make concentrating the different LEDs towards a common point easier. good thinking. " | Read more » about 10 years ago
warren "Exciting! " | Read more » about 10 years ago
sekjal "Can't wait to get my hands on the updated version and build some sweet Lego cases/containers/contraptions! " | Read more » about 10 years ago
donblair "And here's a nice way of doing color mixing using a ping pong ball as a diffuser: https://teachers.web.cern.ch/teachers/archiv/hst2005/part_sessio..." | Read more » about 10 years ago
donblair "Mathew -- AIR HOGS! Just watched the video -- WHUUUT!! We've got to do this! That's so much fun! We could be sampling the entire room remotely!..." | Read more » about 10 years ago
mathew "Sekjal, It would be really cool to have a rangefinder, but they're pricey sensors, and might significantly up the cost of the board. Don- I fixed ..." | Read more » about 10 years ago
sekjal "If we can determine the change in reading to be purely a function of distance alone, perhaps adding an ultrasonic rangefinder to the IR sensor/serv..." | Read more » about 10 years ago
donblair "Mathew -- I have never been so eager to follow a missing link -- where's the wall-climbing remote control toy car?! :) Wait a minute -- are you su..." | Read more » about 10 years ago
mathew "This is a really neat idea. thanks for working on this distance calibration. I have a stud finder that has felt on the bottom, and sounds similar..." | Read more » about 10 years ago
sekjal "There are Lego bricks for just about anything :) I was thinking that, since there are screw holes in the corners of the board already, flat topped..." | Read more » about 10 years ago
donblair "This is fantastic! I didn't know there were Lego parts that did that sort of height adjustment thing :) Your results are really important -- so n..." | Read more » about 10 years ago
ajawitz "The "REVA" board looks awesome! It looks like you can get a lot of the components you use at Adafruit now for a good price too, so that might help..." | Read more » about 10 years ago
liz "Wow this is great! Nice to hear from you Zenon. Would you consider sending out to your neighbors on plots-nyc@googlegroups.com? :) " | Read more » about 10 years ago
donblair "Yeah! It's fun to picture this device being used in the mode of an old-fashioned 'light meter' held next to an infragram camera and which accounts..." | Read more » about 10 years ago
warren "wow, sweet -- i wonder if this could also be used to calibrate NDVI with a more absolute brightness measure. Ned would know more about this... " | Read more » about 10 years ago
sara "It would be cool to see these in false color? " | Read more » about 10 years ago
kanarinka "I agree that this is great Zenon and we are looking to do something similar with another project. Who was your audience for this video? For our con..." | Read more » over 10 years ago
karenv "This is fantastic! Would LOVE to do this for our work on a local power plant. Super interesting to see the plume move and change shape so much. Agr..." | Read more » over 10 years ago
mansfield "Great stuff! We would love to see this for our local applications. Some things that would make it even more useful: 1) a scale so we can see the p..." | Read more » over 10 years ago
warren "woohoo! http://publiclab.org/notes/donblair/02-28-2014/thermal-flashlight-reva-mostly-built " | Read more » over 10 years ago
donblair "Here she is! IR sensor hasn't yet been placed, but here's the basic idea: https://www.youtube.com/watch?v=nI041unDNr8 " | Read more » over 10 years ago