Ghost image process-----with example 0/1
luxo
Because I want to do some drawing like that...
What the meaning of the black little thing?...
See the Bitmap & make the experience
It's just magical!
Thanks in advance
LuXo.
Daniel P. B. Smith
>Could someone explain me how this is working?
>Because I want to do some drawing like that...
>What the meaning of the black little thing?...
>
>See the Bitmap & make the experience
>It's just magical!
Luxo, in English this is called an "afterimage." Normally the eye is in
constant motion. When you look at something for a long time without
moving your eyes, the parts of the retina that are looking at bright areas
get fatigued. Then you look at a white sheet of paper, you see a reversed
or negative version of the original image. What was bright now looks dark
because the eye is fatigued. It looks blurry because you can't keep your
eyes perfectly still during the original exposure.
It is like the dark spot you see for a while after someone flashes a
camera at you.
Colors are reversed, too. Draw a French flag but make the bars green,
black, and yellow. Make a little white dot in the center of the black
bar. Stare at the white dot for thirty seconds. Look at a white sheet of
paper. You will see a ghostly, indistinct French flag in pastel red, white
and blue.
[I asked Luxo to email me the picture. It is a negative image of Jesus,
with the directions "Concentrate on the four dots in the middle of the
picture for about 30 seconds. Then close your eyes and tilt your head
back. Keep them closed. You will see a circle of light. Continue
looking at the circle... WHAT DO YOU SEE?" It is a fairly crude
image--looks as if it might have been photocopied, faxed, and re-scanned
repeatedly, accumulating more dust specks each time. Bilevel,
black-and-white, no grayscale. The head of Jesus is white on a solid black
circular area, so the afterimage is a glowing solid white circle with a
cameo-like picture of Jesus on it.
It does NOT seem to be a copy of the Shroud of Turin image, by the way.
For some reason, the fixation point is a set of FOUR closely spaced black
dots in a vertical line on Jesus' nose; I don't know why they use four
dots instead of one; I suppose a single dot would be hard to recognize and
they did not want to disfigure the image by using a cross...]
--
Daniel P. B. Smith
dpbs...@world.std.com