math for compositing

[Anonymous]

i’m looking for a detailed description of each layering mode math.

i’ve comme accross a page on the internet that was explaining very clearly each blending mode and what math operations were involved but i lost the link. there were more than 20 blending modes explained at math level.

i would really appreciate a hint in this layering mode math stuff.

thank you

[BKM]

Try this on for size….

http://www.mlab.uiah.fi/touch/DCN/DC.html

BKM

[Anonymous]

i already have brinksmann book, it’s very good but i’m looking for a lot more math.

thank you

[sinancg]

http://www.fxguide.com/modules/fxtips/files/logicops_sampler/i.html#

At the bottom you will find a link that will take you to a logic ops samples, it is FFI based but includes the math…

Sinan Vural

[Anonymous]

the link it’s ok but i’m looking for something more complex than just the discreet implementations.
for example i thought that screen op is:
(1-(1-A)*(1-B))
but it looks like for discreet is:
(A*(1-B))/(1+B)
where 1 is the normalized value of the image channel.

the page i was looking for has a complete description of the math of more than 20 logic ops.

[Anonymous]

fount it, tx anyway!
http://www.pegtop.net/delphi/blendmodes/index.htm

[sinancg]

It would be interesting to know how you will implement this stuff. And yes we have been asking for pixel based math for some time for FFI.

Nice link by the way thanks

Sinan Vural

[Author]

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