[Radiance-general] pixel axis origin

[Ery Djunaedy]

Folks,

I reported the RGB values from an HDR image using the following command:
pvalue -h -H -o filename.hdr

I get something like:
       0    3743       2.713e-03       2.541e-03       2.541e-03
       1    3743       2.713e-03       2.541e-03       2.541e-03
       2    3743       2.730e-03       2.558e-03       2.627e-03
       3    3743       2.747e-03       2.592e-03       2.661e-03
       4    3743       2.696e-03       2.610e-03       2.661e-03
       5    3743       2.730e-03       2.644e-03       2.696e-03
       6    3743       2.627e-03       2.644e-03       2.661e-03
       7    3743       2.696e-03       2.696e-03       2.713e-03
       8    3743       2.782e-03       2.696e-03       2.747e-03

My question is: where is the (0,0) located? Bottom left of the image? 
And then the result of that command prints the pixel from top left?

Thanks,

Ery