rgb half vs short

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Old 06 June 2010   #1
rgb half vs short

anyone know the main difference between rendering
rbg 16 short and rgb 16 half?
I know , half is a floating point with half precision:
http://en.wikipedia.org/wiki/Half_precision
16bit short is 16bit integer, means the maximum of color variations per rgb channel is 2^16 = 65536

My question is:
when it comes to production which one to pick for after effects or nuke?
 
Old 06 June 2010   #2
half is better for Nuke because it's floating point (Nuke does everything in 32-bit anyway). I don't know how AE handles 16-bit float but Photoshop opens them as 32-bit because it doesn't support half.
 
Old 06 June 2010   #3
yeah after effects reads it the same way as photoshop-- you have to switch to 32 bpc for it to read floating point properly. it's also incredibly slow, at least in CS4. if you have the option to use nuke, do it, it's way faster with float files.
 
Old 06 June 2010   #4
what exactly means "floating point with half precision" ?
 
Old 06 June 2010   #5
http://en.wikipedia.org/wiki/Floati...g-point_numbers

There is a standard for representing floating point numbers in computing, this wikipedia page should explain it.
 
Old 06 June 2010   #6
cheers, looks complicated.
 
Old 06 June 2010   #7
thanks guys
Nuke it is
 
Old 06 June 2010   #8
Originally Posted by longrayjohnson: what exactly means "floating point with half precision" ?


Someone correct me if I'm wrong but I think this just means fewer decimal places for the float value, meaning it's not as precise as a full 32-bit float value.
 
Old 06 June 2010   #9
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