Envelope security patterns, some have a stipple that repeats in an unusual way. When viewed with a stereoscope they appear flat in 3D, but inking variations stand out from the plane. I would expect the "(c)designer" message to be 3D embedded in the stipple. Keep your eyes open and look for hidden messages. Anyhow, with your stipple examples, you only print part of a pattern overlap, so I cannot see the middle strip in 3D. It takes a full repeat of the pattern to get 3D of the full pattern. Steganography. It would be possible to hide messages as 3D changes to the stipple pattern. That would not be noticed by sensors who would look at the envelope contents. They are lucky so many of us are honest. Since there is a repeat it should be possible to use a computer to scan and then read the internal letter through the pattern by deconvoluting the image to remove the pattern. You cannot be a truly good person, if you do not have wicked thoughts, and reject them.
Envelope security patterns, some have a stipple that repeats in an unusual way. When viewed with a stereoscope they appear flat in 3D, but inking variations stand out from the plane. I would expect the "(c)designer" message to be 3D embedded in the stipple. Keep your eyes open and look for hidden messages.
Anyhow, with your stipple examples, you only print part of a pattern overlap, so I cannot see the middle strip in 3D. It takes a full repeat of the pattern to get 3D of the full pattern.
Steganography. It would be possible to hide messages as 3D changes to the stipple pattern. That would not be noticed by sensors who would look at the envelope contents. They are lucky so many of us are honest.
Since there is a repeat it should be possible to use a computer to scan and then read the internal letter through the pattern by deconvoluting the image to remove the pattern.
You cannot be a truly good person, if you do not have wicked thoughts, and reject them.... Collapse
