Quote:
Originally Posted by Shiandow
Well ,the original SuperRes code (designed for MPDN) used 16 bit uint for most of the processing. It does store an intermediate results in float, but that conversion is handled by the GPU itself. I'm not even sure if that part is necessary, signed ints would probably work just as well.
However the shaders will still use floats (single precision) internally. And as far as I know GPUs aren't that good at integer (or fixed point) arithmetic, but maybe that's changed.
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GPU are TERRIBLE with integer. But it have a fast internal conversion from integer to float.
Like KNLMeansCL, this is the way forward:
Read Integer Buffer --> GPU internal Conversion to normalized float --> Processing float --> GPU internal Conversion to integer --> Write to Integer Buffer.
Anyway, in this case it is better not to use float rather than converting by CPU.