[Radiance-general] Colordata question!

[Gregory J. Ward]

Sorry -- I should have offered an example.  Say you have a 10x15 grid  
of color values, given as ASCII triples like:

1.3871 3.8183 2.1783
(continue for another 149 values)

And the ordering corresponds to left-to-right, top-to-bottom (English  
text) organization.  To convert this to a smooth 1000x1500 picture,  
you could use:

% pvalue -r -h -Y 15 +X 10 -d data.txt | pfilt -1 -x 1000 -y 1500 -r . 
6 > data.pic

-G

> From: "Gregory J. Ward" <gregoryjward at gmail.com>
> Date: July 24, 2006 5:18:58 PM PDT
>
> Hi Marija,
>
> If you use the default "red" "green" and "blue" functions for  
> rfunc, gfunc, and bfunc, you will get a bilinear interpolation by  
> default.  It may not look very nice, though, as bilinear  
> interpolations tend to show "mach band" artifacts.  A simpler  
> approach would be to convert your data into a low-resolution image  
> then upsample it with pfilt.  The conversion can be done using pvalue.
>
> -Greg