Hi Folks -
I'm trying to use hdrgen with a response curve created by photosphere. For the
image, I have calibration points measured with a luminance meter, and when I
make the hdr with photosphere, I get an accurate luminance measurement, but
hdrgen gives me a value that's consistently ~10% higher. This is surprising as
(I think) I'm using the same response curve for each process.
Here's my hdrgen command:
hdrgen -o ../01.hdr -r canon_5D.rsp -q 100 -f -g *.JPG
Here's what I put into canon_5D.rsp:
7.135383e-03 -3.556814e-02 2.441168e+00 -5.786777e+00 4.462320e+00
4.543790e-03 3.363440e-02 1.917460e+00 -4.660105e+00 3.792747e+00
3.956902e-03 3.244581e-02 1.827308e+00 -4.505138e+00 3.729707e+00
Here's canon_5D.rsp after hdrgen is run:
3 1.49643 -0.979 0.486712 -0.00413976
3 1.44009 -0.884479 0.448854 -0.00446749
3 1.46366 -0.875187 0.414554 -0.00303108
And here's the response curve from Photosphere:
"Canon"|"Canon EOS 5D Mark
II"|"v.0"|{7.135383e-03,-3.556814e-02,2.441168e+00,-5.786777e+00,4.462320e+00}|{4.543790e-03,3.363440e-02,1.917460e+00,-4.660105e+00,3.792747e+00}|{3.956902e-03,3.244581e-02,1.827308e+00,-4.505138e+00,3.729707e+00}
Am I missing any hdrgen options, or perhaps making an error in my .rsp file?
Thanks in advance for any insights.
Mike
Michael Martinez ~ Associate
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