hugin-devs team mailing list archive

[Bruno Postle <683448@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This is a feature that should be easy enough to add, we figured all this
out a while back but I haven't got around to writing it up.

'zeronoise' is a tool that combines bracketed exposures to produce
output with reduced noise in dark areas, Hugin could do the same thing
(but much better) as an alternative to the usual enfused output.  You
can reproduce the technique like this:

Shoot a bracketed stack (or more than one) with the shortest exposure
the 'right' one, and with additional overexposed shots to capture dark
areas.

Remove any 'blown out' areas of the overexposed shots by setting 100%
transparency to these areas, this is very important.

Photometrically align them in Hugin and generate 'Normal' output with
individual remapped images, i.e. you will end up with a series of photos
that all have the same 'exposure', except they started as differently
exposed photos.  Some shots will have more noise that others, and others
will have transparent areas where there should be highlights.

Now run them through enfuse.  It turns out that enfuse is _very_ good at
picking the lowest noise data from each shot, you will end up with a
photo that looks just like a normal photo except with hardly any noise.

To do this, Hugin would need:

A nona option to automatically remove blown out areas from input photos
when remapping, actually I suspect this would be generally useful when
using enfuse 'normally'.  Note that a 'blown out' area may only be
saturated in a single channel.

An additional output option that does exposure correction like 'normal'
output, but which uses enfuse to merge stacks like the existing
'exposure fusion' output.

** Affects: hugin
     Importance: Wishlist
         Status: New


** Tags: enfuse zeronoise

-- 
Hugin should support 'zeronoise' output
https://bugs.launchpad.net/bugs/683448
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Status in Hugin - Panorama Tools GUI: New

Bug description:
This is a feature that should be easy enough to add, we figured all this out a while back but I haven't got around to writing it up.

'zeronoise' is a tool that combines bracketed exposures to produce output with reduced noise in dark areas, Hugin could do the same thing (but much better) as an alternative to the usual enfused output.  You can reproduce the technique like this:

Shoot a bracketed stack (or more than one) with the shortest exposure the 'right' one, and with additional overexposed shots to capture dark areas.

Remove any 'blown out' areas of the overexposed shots by setting 100% transparency to these areas, this is very important.

Photometrically align them in Hugin and generate 'Normal' output with individual remapped images, i.e. you will end up with a series of photos that all have the same 'exposure', except they started as differently exposed photos.  Some shots will have more noise that others, and others will have transparent areas where there should be highlights.

Now run them through enfuse.  It turns out that enfuse is _very_ good at picking the lowest noise data from each shot, you will end up with a photo that looks just like a normal photo except with hardly any noise.

To do this, Hugin would need:

A nona option to automatically remove blown out areas from input photos when remapping, actually I suspect this would be generally useful when using enfuse 'normally'.  Note that a 'blown out' area may only be saturated in a single channel.

An additional output option that does exposure correction like 'normal' output, but which uses enfuse to merge stacks like the existing 'exposure fusion' output.