[Radiance-general] Falsecolor auto scale

[Thomas Bleicher]

Giovanni.

The "-s auto" option uses phisto and sed to work out the maximum scale
from the image. One or both may not be available on your system. BTW:
Where does the falsecolor binary come from? The 3.9 MinGW bundle does
not have it, iirc. Perhaps that feature is not implemented at all.

As for falsecolor2 I just haven't implemented the "auto" option.

If you can script a bit you can try to find the max value with
pextreme and calculate a maximum scale from that.

Regards,
Thomas


On Thu, May 6, 2010 at 3:19 PM, Giovanni Betti
<gbetti at fosterandpartners.com> wrote:
> Dear All,
>
> I am trying to programmatically convert a number of radiance images into
> their falsecolor equivalent. As the images display a wide range of
> possible values I am trying to figure out a method for automatically
> adjust the scale.
>
> The manual page of falsecolor reads: "If the argument given to -s begins
> with an "a" for "auto," then the maximum is used for scaling the
> result." Which is exactly what I need, unfortunately it does not work
> for me: no error is thrown but the scale is always the standard 0 to
> 1000.
>
> This is the syntax that I am using:
>
> " Falsecolor -ip mypic.hdr -s a -n 10 -l Lux > mypic_fc.hdr "
>
> I am using Radiance 3.9 on Windows, which might be the reason.
>
> I have also tried this on the real useful falsecolor2 by Thomas Bleicher
> (thanks!!) and in this case I receive the error 'bad option'.
>
> Does anyone have any suggestion/clue?
>
> Thanks in advance,
> Best,
>
> Giovanni
>
>
>
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