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Infrared Cameras And Ghost Hunting


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#1 CDS

 

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Posted 07 August 2017 - 03:22 AM

A interesting short article. Worth the read if you use a FLIR.

http://www.csicop.or...d_ghost_hunting
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#2 KlaineyGStudy

 

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Posted 07 August 2017 - 04:21 AM

Thanks for sharing :)
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#3 chapsparanormal

 

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Posted 07 August 2017 - 10:06 AM

We use FLIR and this is very true. 90% of the results you get are false pos, most people save for HVAC tech and fireman don't know how to use them. Us we are still learning by experience. The amount of times it turns out to be a reflection is incredible. I showed one on my podcast some weeks ago where it looked like spirits behind our cameraperson, but it waS  a reflection off glossed surface. As we took a FLIR pic, then a regular pic at the same time.

Only time I have seen anything to it, was recently at Mansfield. Where heat sigs were moving off of a wire bed, upwards and in the exact spot where someone had burned to death. Now, this is not proof just compelling to ponder
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#4 siguie

 

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Posted 07 August 2017 - 04:20 PM

Meh he's really talking about the colour image overlay infrared cameras, and while "yes" you can get unexpected infrared reflections it's generally pretty easy to work out what is happening. For the most part what used to be considered Infrared vimaging is now considered "night vision" and the artificial colour overlay stuff is really more "thermal imaging"... but yes technically it is all IR imaging of one sort or another.

People always screw up the colour overlay because they generally set their devices for ultra sensitivity and automagic scaling. PLUS few actually understand how the parts work. Often times you have two cameras side by side so you get parallax issues, also the IR camera is often lower resolution and they use smoothing/blurring algorithms to make things look pretty BUT coupled with the artificial colours you get dramatic differences for near zero temperature changes and things "floating" where there should be nothing.

More importantly very few people take emissivity into consideration mostly because they don't know what it is or even how to pronounce it :no:

So yes, people will make mistakes and understandably so :yes:


Dave, in cases like your example this is where a "good" no contact IR thermometer would be eXtremely useful :yes: You could check the location to see if there really is a temperature variation as seen AND come back later to check the emissivity. Keep in mind that even cheap IR thermometers will be more accurate than entry level FLIRs :yes:

Anywho this is a good blog  http://thermal-imaging-blog.com/

If you take a look at this post he starts discussing emissivity but more importantly there is a good example image of reflections in a metal object {spoon}...

Emissivity: Understanding How it Affects Your Thermal Images
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#5 chapsparanormal

 

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Posted 07 August 2017 - 05:16 PM

Granted a very good point. We use the pistol thermo guns often.
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#6 EVP

 

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Posted 07 August 2017 - 08:18 PM

The article Chris is pointing to is the same Benjamin RadfordI who authored "Scientific Paranormal Investigation" that was released in 2010. I don't mean to stereotype but he's very much on the same level in criticism as James Randi with the paranormal. Radford raises some valid points but I found myself almost uncomfortable reading his book cover to cover. He's brutal and extremely critical. His friend Joe Nickell's another educated American skeptic is a much easier read in Missing Pieces. Hardcore skeptics have similar traits to true believers and one has to weigh both sides to find a balance.

Edited by EVP, 07 August 2017 - 08:20 PM.

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#7 chapsparanormal

 

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Posted 07 August 2017 - 08:32 PM

Also a great point.
Skeptics have a very important role to play as long as they don't rely on their own self importance.
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#8 EVP

 

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Posted 08 August 2017 - 03:43 PM

View Postchapsparanormal, on 07 August 2017 - 08:32 PM, said:

Also a great point.
Skeptics have a very important role to play as long as they don't rely on their own self importance.

I agree with that acute observation.
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