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16bit project gives colors only up to 32768?
Why do all color values go 0-32768 in an AE 16bit project? A 16 bit number ranges 0 to 65535. (a 15 bit value would go 0 to 32767.)
In combustion, when set to 16bit – “white” has RGB values all 65535. But AE 16 bit “white” has RGB values of 32768?
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5 Replies
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i’ve seen that number come up before in regards to an image sequence limit in ae…
it was described as: ‘it seems that there is a limit that has to do with the upper bounds of a 16-bit integer (32768)’ by wuzelwazel.
have you checked on the adobe forums yet?
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Right – but thats what I mean. A true real 16 bit number goes up to 65536, not 32768. So why is AE not using the full range of 16 bit values?
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i agree… i was just stating that the 32768 limit in ae for a 16-bit integer seems to go deeper than just colors. have you checked the actual colors of 32-bit in ae? i’m kind of curious about that now.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
32bit is float so all the values go 0-1.
And yes – its everything, not just colors. A “levels” effect in a 16bit project has its white point at 32768 by default.
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[dhenion] “A true real 16 bit number goes up to 65536, not 32768.”
I can’t imagine why, but perhaps Adobe used a signed integer instead of an unsigned one. I remember having to get my head around the whole ‘there are 65536 numbers in a signed 16-bit integer but only half of them are positive’ thing way back when I was taking programming classes… I don’t know why there would be such a limit on colors but I’m guessing that there’s a reason for it and it probably has to do with the way that AE composites colors.
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