[GRASS-user] rectifying digital images

[sebastian sauer]

Mon 07 Jan 2008 15:45, Markus Neteler wrote:
> On Jan 7, 2008 3:03 PM, Maning Sambale <emmanuel.sambale at gmail.com> wrote:
> > >From the manual of Leica Photogrammetry Suite:
> > Bundle block adjustment determines the position and orientation for each
> > image in a project as they existed at the time of photographic or image
> > exposure. The resulting parameters are referred to as exterior
> > orientation parameters. In order estimate the exterior orientation
> > parameters, a minimum three GCPs is required for the entire block,
> > regardless of how many images are contained within the project.
> >
> > This maybe what GRASS needs as an additional functionality.
Maning, c'mon what does this Leica marketing blah-blah help??

if it's *that easy* plz feel free to implement this "additional
functionality". actually there exists a pretty nice, quite well known
general purpose implementation. http://www.ics.forth.gr/~lourakis/sba/

(maybe OSSIM might have parts of this "additional functionality"
implemented.)

also somehow, i fear you just don't realize that your images have a
very high lens-distortion, while professional arial cameras produce 
quite rectilinear images.


if its of general interest on this mailing-list, i can explain that in 
detail.
(personally i also strongly believe lens correction should *not* become 
part of the GRASS code-base, as it would a duplication of effort. and 
very recently there's quite some high-quality knowledge (and even some 
quite promising code) in the FOSS-community, which would be also perfect 
for our photogammetric needs.)


> I have found the author's recent email address of these BBA scripts,
> will le you know if he responds.
having this code, would surely not hurt :)


cheers,
s.