[ptx] fulla bugs

[Pablo d'Angelo]

Hi Bruno,

Thanks for the bug report.

Fulla had some serious bugs when combining tca and distortion correction 
coefficients, that could also lead to incorrect red and blue coefficients, 
even if no green coefficients were given.

I have fixed this now. This, however required a rewrite of the cropping 
algorithm, that crops away black borders and color seams at the edges (when 
using TCA correction).

The vignetting correction (both flatfield and radial) should also work now.

I have added two new options:

-i set gamma of input image (used during vignetting correction and is 
especially useful for the divisive (<- is this an english word?) correction.

-s do not crop black borders.

I haven't had the time for thorough testing yet, but it seems to work.

ciao
   Pablo

Bruno Postle schrieb:
> I have some fulla tca correction parameters which seem to be ok:
> 
>  fulla  -r -0.000183:0.001241:-0.000890:1.000554 \
>         -b -0.018228:0.035394:-0.021134:1.004761 \
>         $@
> 
> I can also correct barrel distortion for all channels using predefined 
> parameters:
> 
>  fulla -g 0.06199:-0.19226:0.15878:0.97149 $@
> 
> ..but if I combine them into one command, it appears that only the green 
> channel is corrected for barrel distortion:
> 
>  fulla  -r -0.000183:0.001241:-0.000890:1.000554 \
>         -b -0.018228:0.035394:-0.021134:1.004761 \
>         -g 0.06199:-0.19226:0.15878:0.97149 \
>         $@
> 
> Also vignetting correction doesn't seem to do anything, these parameters 
> which correct vignetting nicely within hugin have no effect in fulla:
> 
>  fulla  -c 1:0.198:-0.509:0.2 $@
>