This is very cool (and, amazingly, I've gotten it to work form me.) I'm
still trying to figure out how to run the perl script, but I'm happy I at
least have the commands working on the command line!
Any way, I'm curious, does this script produce essentially the same results
as if you output differently exposed tiffs converted from a RAW file, or
would that technique offer a slightly better result? I ask out of curiosity
(I don't normally have access to a camera that shoots RAW.)
Thanks,
John
On Wednesday, December 12, 2012 3:55:33 AM UTC-6, bugbear wrote:
>
> JohnPW wrote:
> > What are you folks doing to "faux-bracket" your images?
> > With RAW files, obviously you can do all sorts of non-destructive
> things, but I assume you aren't using RAW files though, or it wouldn't
> really be all that "faux."
> > If you are using conventional files, I assume you are adjusting the
> curves?
> >
> > Sorry BugBear, I'm not smart enough to be able to read your perl script
> (other than that you are using something to adjust something and then
> enfusing the resulting images!)
> >
> > I really need to lear scripting!
>
> OK - ignoring the script, here are the external commands issued by the
> script for a run:
>
> proc.pl o1.tif o2.tif
>
> convert o1.tif -sigmoidal-contrast 5x0% c000.tif
> convert o1.tif -sigmoidal-contrast 5x20% c020.tif
> convert o1.tif -sigmoidal-contrast 5x40% c040.tif
> convert o1.tif -sigmoidal-contrast 5x60% c060.tif
> convert o1.tif -sigmoidal-contrast 5x80% c080.tif
> convert o1.tif -sigmoidal-contrast 5x100% c100.tif
> enfuse --output=o2.tif c000.tif c020.tif c040.tif c060.tif c080.tif
> c100.tif
>
> I'm assuming people on this list know what enfuse does.
>
> I'm using ImageMagick ("convert") to make derived files from the original
> image, with (severaly) skewed image curves, all the way from skewed
> to the dark (so most of the dynamic range in the output file is expanded
> from the shadows of the source) to skewed to the dark (ditto, sort of).
>
>
> http://www.imagemagick.org/script/command-line-options.php#sigmoidal-contrast
> http://en.wikipedia.org/wiki/Sigmoid_function
>
> The upshot is a range of image with enhanced contrast in the
> various intensity ranges of the original image.
>
> Enfuse then "just" picks and merges the best pixels in
> the usual way.
>
> BugBear
>
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