Posted on behalf of Craig Southeren who does not have access to
a net account:
-------------------------------------------------------------------

Can anyone provide me with a colour space transform that would
emulate the effects of red/green colour blindness? I have had
a quick look in the computer graphics literature with no results.
Perhaps someone who has access to medical information could help?

I would like to write a program (probably a PPM filter) to allow
previewing of images to check for sufficient contract for colour
blind users. Not being colour blind myself, this is a bit difficult!

Please email replies - I will summarise and repost if there is
sufficient interest

    Craig


---------------------------------------------------------------------
Craig Southeren                      |  "You can have it good, cheap,
Chief Engineer,                      |   or fast. Any two."
Picture Start Productions            |      Arthur C. Clarke
email: c/- geoffw@ucc.su.OZ.AU       | 
phone: +61 2 959 5550                |  "Educate - don't legislate"