[Radiance-general] Removing black areas in imagemapping

[Andrew McNeil]

Hi Per,

Perhaps you are experiencing rounding error larger than FTINY.  I¹d suggest
replacing FTINY with a larger value (ie 2e-3) and seeing if black spots
reduce.  A bit of trial and error might be necessary.

If that doesn¹t work can you send more scene info?  I¹d like to see your
falsecolor statement, your colorpict and mixpict material definitions and
perhaps you could post your contour image in hdr format.

Best,
Andy


On 1/11/10 4:10 AM, "Per Haugaard" <perhaugaard at yahoo.dk> wrote:

> Dear users,
> 
> I am mapping a falsecolor image on a working in a room but there is still some
> black parts left in the image.  I have FTINY as a guard against rounding
> errors but it does not remove everything.
> 
> As written i Axel J. tutorial I have build a ..cal file with a nonzero
> function:
> 
> nonzero(r,g,b) = if(max(r,max(g,b))-FTINY, 1, 0);
> fc_u = -(Py-16.6)/12.8;
> fc_v = (Px-0.2)/12.8;
> 
> Any idea of how to remove the remaining black spots in the image?
> 
> The images can be seen at:
> http://perhaugaard.blogspot.com/2010/01/removing-black-parts-in-imagemapping-i
> n.html 
> 
> 
> Happy new year
> 
> /Per
> 
>  
> 
> 
>  Trænger du til at se det store billede? Kelkoo giver dig gode tilbud på LCD
> TV <http://dk.yahoo.com/r/pat/lcd> !
> 
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