[ImageJ-devel] imglib positionables for dimension 0

[Stephan Preibisch]

I think for many (n-dimensional) algorithms 1-dimensional temporary arrays
of <T> are necessary in some form, as it is now for example in Gaussian
Convolution and Fourier Transform. It is no overhead for any other
container. If you do not want to implement it you could simply write:

setPosition(long)
{
   // call existing but maybe slower method which does the same
   setPosition(long,0);
}

But as temporary Img, where you know it is one-dimensional it gives you a
clear benefit. And of course, if I make a temp 1-d Img<T> I would only use
ArrayImg<T> - or CellImg<T> if a dimension is larger than
Integer.MAX_VALUE/EntitiesPerPixel. It would also be fine with me if only
those two do it and implement a special new interface.

Steffi

-----Original Message-----
From: Johannes Schindelin [mailto:Johannes.Schindelin at gmx.de] 
Sent: Thursday, May 12, 2011 1:55 PM
To: Stephan Preibisch
Cc: saalfeld at mpi-cbg.de; 'Tobias Pietzsch'; 'Fiji-devel'; 'Imagejdev.org
Developers'
Subject: Re: [ImageJ-devel] imglib positionables for dimension 0

Hi,

On Thu, 12 May 2011, Stephan Preibisch wrote:

> what do you think about that:
>
<http://pacific.mpi-cbg.de/wiki/index.php/ImgLib2_Discussion#Positionables>
> http://pacific.mpi-cbg.de/wiki/index.php/ImgLib2_Discussion#Positionables

I understand the reasoning, but wouldn't it be better to make that a new 
interface? For most truly n-dimensional algorithms, setPosition(long) 
would not be needed, and I could imagine that at least for some containers 
(think Hilbert-curve) setPosition(long) could be pretty complicated for no 
clear benefit.

Ciao,
Dscho