Which format to use for float-values?

Support Compositing and Post Processing
1

I would like to grade pictures in the compositor, that consist of 32-bit RGB float-values. Currently, I have them in a 2D-python array. In which format should I export them, in order to import the picture in the compositor of Blender?

2

have you tried open exr ?

3

yes, I tried it. I think, this is what I was looking for.

4

The two formats that are designed for holding intermediate data are “OpenEXR” and its close relative, “MultiLayer.” These files aren’t designed to be “viewable images.” Rather, they’re designed to be containers for the actual floating-point numbers that have been generated.