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pf16375593
pf16375593
Participant
August 22, 2018
Question

Bring out ink (handwriting) from an infrared image

  • August 22, 2018
  • 2 replies
  • 199 views

I have been testing different inks that are visible under IR - now some inks simply don't show. Is there a way to apply a filter / channel etc.  to bring out the colours of the ink?

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2 replies

Norman Sanders
Norman Sanders
Legend
August 22, 2018

The following site may be helpful:

https://maxmax.com/phosphorsdyesandinks/infrared-phosphors-dyes-and-inks/infrared-down-conversion-powder/ir-ink-down-conversion/amp

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    August 22, 2018

    You can check each channel individually. There might be a faint trace in one channel, obscured by the others.

    But basically, if you can't see it, you can't see it. There's nothing "hidden". An IR image is no different than a visible light image.

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