> In fact my question was more, given a normal LDR image with variation of
> intensity clipped between 0 and 1, is it possible to create directly a HDR
> image by calculating the intensity value from the clipped one, by using a
> function I=f(r,g,b) with I being maximum (and much higher than 1 of course)
> for White?

No. If the data is clipped (like POV output) how should it be recovered. If
the data is compressed (like done with Kari's patch) there is no need to use
HDR shop, simply usse a higher ambient value, but the quality will not be the
same as with "real" hdr data. .

>As I said, HDR shop accepts to do this but I'm not sure that the
> final image really has hot spots (but then I have not tested this
> extensively).

To recreate HDR data you'll need a couple of images (lets say 5 to 10
more are better) with different exposer, this works fine.

-Ive

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