Re: using IR photography to see water content distribution

[George L Smyth <GLSmyth@xxxxxxx>]

Rui Costa wrote:
> 
> Hi
> 
> I work in a Food Eng lab and I want to try to take IR pictures (B&W) of some
> foods that present water content profiles (e.g, french fries, dried
> apple, etc).
> 
> Does anyone know if I will be able to see any relation between water
> content and gray values? For examples, areas with higher water content to
> present a stronger gray color than areas with a lower water content ?
> 
> I was looking for scientific applications of IR photography but I
> couldn't find anything. Does anyone know any simiar application ?

Water does not reflect IR well.  I'm not certain exactly how you would
use IR film to examine this.  The only book I know of that addresses
scientific applications with IR is Walter Clark's "Photography By
Infrared."  The book is out of print and nearly impossible to find,
although you should be able to get it through interlibrary loan.

george

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