On Wed, 12 Aug 1998, Dr. Terrance Boult wrote: > > Since the CCD can see very near IR, most thin or "breathable" cloth materials > (and there are many, e.g. silk, rayon, and thin cottons) are nearly > transparent. (Similar in a sense to the tan-through bathing suits, just a > different part of the spectrum). If however, the camera also sees the > visible range then it will generally dominate the image and you'll see the > surface markings. if you add a visible cutoff filter (say passing 700-1000 > nm), you'll see mostly the IR part and will see through many materials. > (Note this has some potential for looking through haze but at 1000nm its > still not that good. it will NOT see through almost any plant materials or > smogs with high-water content. Note that the focus is more difficult it the > IR domain so you will probably have to focus by hand. > Is it seeing through the fabric because the fabric is mostly transparent to IR light and the human body isn't, or is it seeing 'body heat'? I was under the impression that an IR and nIR are different from thermographic cameras. -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.ml.org
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