[ImageJ-devel] proposed changes in the ImgLib2 abstract class hierarchy

[Stephan Saalfeld]

Hi,

in response to its enormous geek-attraction factor, we've plugged a
Mandelbrot RealRandomAccessible into the interactive 2d-viewer example:

http://fiji.sc/cgi-bin/gitweb.cgi?p=imglib.git;a=blob;f=imglib2/tests/src/test/java/tests/RealRandomAccessible2DViewerExample.java

So one can easily find one's favorite place.  Computers got really quick
these days...

Albert, real coordinate access by interpolation has been in ImgLib
forever, neatly integrated into the ImgLib2 schema since I've introduced
the Interpolant together with RealTransforms.  We have, though, never
announced it with the exact wording that it can be used to zoom
infinitely into an image ;)---it can.  All the examples, stack rotation,
2d image rotation are using it.  To make it more obvious, I have added
zoom and shift capabilities to the 2d and 3d slice viewer examples,
toggle the interpolation method with the 'I'-key to see the difference.
As a side effect, that works not only for Interpolant but for any
RealRandomAccessible and thus could be used for an interactive
Mandelbrot explorer :).  Interpolant will make it into the examples for
real transformations.

ImgLib2 for president!

...and back to my boring work...

Best,
Stephan




On Thu, 2012-03-15 at 17:34 -0400, Albert Cardona wrote: 
> El 15 de març de 2012 16:57, Tobias Pietzsch <pietzsch at mpi-cbg.de> ha escrit:
> > Hi,
> >
> > I've implemented more changes to the ImgLib2 abstract class hierarchy.
> > This time, I restructured the integer Positionables, Localizables, and
> > RandomAccesses.
> >
> > While I was at it, I merged a new version of CellImg (this is in preparation
> > for CellImgs that swap Cells to disk) because I didn't
> > want to need to fix that for the new abstract hierarchy later.
> > ListImg has also been changed a bit. And I made some cosmetic changes
> > here and there...
> >
> > I think I broke nothing and I would merge this into master soon.
> >
> > It would be totally awesome, if you could try your ImgLib2 stuff with
> > the branch "modified-abstract-hierarchy" and see if everything works okay.
> >  If you have time to comment on the changes I made - even better.
> >
> > best regards,
> > Tobias
> >
> > BTW: did you see the cool fractal example on
> > http://fiji.sc/wiki/index.php/ImgLib2_Documentation#A_RealRandomAccess_to_Render_Mandelbrot_Fractals
> > ?
> > :-)
> 
> 
> Now that is a very cool example! It is surprising how short the code is.
> 
> A perhaps more relevant example for bioimage informatics is the
> extraction of an interpolated pixel at a specific floating-point
> coordinate, which could be used to infinitely zoom in/out onto an
> image. (Not that different from what you do in the Mandelbrot
> example). If you want to make it even more relevant, use it to
> generate the tiles necessary for a single CATMAID section, in
> combination with the XYProjector and the flashy new ImgSaver :)
> 
> Albert