P3D Colour Anaglyphs

[Dale Walsh <dwalsh1@xxxxxxxxxxxxxxxx>]

Hi all,
 Congratulations to Boris for his new gallery of images  It is a fine addition to his impressive stereoscopic repertoire.
Thanks to him also for reopening the discussion of colour anaglyph imagery with respect to his new and improved True
Colour method .Congratulations and thanks also go to Ray Zone for his work on the exhibition for Colonial Williamsburg and
for his history of  the anaglyph invented as he says by Louis du Hauron in 1891.

 In 1983, I bought two French magazines with colour anaglyph images on their front covers and inside: Photo and Paris
Match (which Ray mentions on his site).  The Photo magazine has photos by Pierre Malifaud, Francis Giacobetti, André Berg
and Emmanuel Malifaud.  The latter claims to have invented the colour anaglyph process.  His explanation of the process he
patented involves separating the colours into cyan, yellow and magenta with the black being discarded.  Further correction
of the individual colours is done to bring the effect closer to “reality”.  He then says the left image is again corrected
to reproduce only half the colours and the right image the other half.  Then when viewing with glasses all the colours are
recreated.  Some image doubling (ghosting) still occurs because of the difference in the ink's colours and those of the
glasses which do not always match. This results in the same colour being seen in both left and right images when no common
colour should exist.  He mentions the solution to this is to lower the complimentary colour.
 Does this sound like what we have been doing with RGB channels or is it completely different?

 I have a new web site which uses Adreas Petersik’s Stereoscope Java Applet.  The site has a few of the images of the new
Sacred Sites slide show I will be presenting at the Photographic Society of America Convention in Toronto from August 30
to Sept. 4, 1999 at the Delta Meadowvale Hotel.  All the images are from the Ganges River.  I have  also provided a JPS
link for each image.  It only works for me using Internet Explorer on my Mac.  Netscape sees the JPS image as a text
file.  I wonder why?
 The URL is http://zap.to/thegangesin3d

 The colour anaglyph images on this site can be easily compared between the traditional colour anaglyph method and True
Color method Boris invented.  I noticed that less retinal rivalry occurs using True Color but that these images are less
colourful or more monochromatic but look quite good besides that.  This seems normal to me since one of the channels is
grey scale or monochromatic.
 What do you see?
 I will bring the two magazines to the convention in Green Bay if anyone would like to see them.

 As an unrelated question, has anyone any sources of information on the 16th century Florentine painter Jacopo Chimenti
who did stereoscopic drawings?
 Thanks.


Dale Walsh
mailto:dwalsh1@xxxxxxxxxxxxxxxx
http://welcome.to/solidillusions

http://zap.to/thegangesin3d



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