# RE : Pixel to solid angle transformation

Hi, Marija, some recent discussions on "*solid angle as represented by each
pixel* in an image produced by Radiance" from Lars and Giulio in the

- Ji

···

On Wed, Feb 13, 2013 at 11:43 PM, Compagnon Raphaël < [email protected]> wrote:

you can use the pcomb program to obtain the solid angle of each pixel of a
picture!

for instance this will translate a radiance picture (origin.pic) into a
"solid angle" picture (solid_angle.pic) where each pixel has a brightness
value that matches the solid angle of the same pixel in the original
picture:

pcomb -e 'lo=S(1)' origin.pic >solid_angle.pic

_______________________________________________
[email protected]

Hi,

Thanks Raphael and Ji.

S(n) function is definitely what I needed.

Now I 'just' need to analyze C code to see how calculation is exactly done.

Thanks again,
Marija.

···

On Thu, Feb 14, 2013 at 8:13 AM, Ji Zhang <[email protected]> wrote:

Hi, Marija, some recent discussions on "*solid angle as represented by
each pixel* in an image produced by Radiance" from Lars and Giulio in the

- Ji

On Wed, Feb 13, 2013 at 11:43 PM, Compagnon Raphaël < > [email protected]> wrote:

you can use the pcomb program to obtain the solid angle of each pixel of
a picture!

for instance this will translate a radiance picture (origin.pic) into a
"solid angle" picture (solid_angle.pic) where each pixel has a brightness
value that matches the solid angle of the same pixel in the original
picture:

pcomb -e 'lo=S(1)' origin.pic >solid_angle.pic