[vtkusers] vtkImageReslice speed

[Sean McBride]

On Wed, 20 Jun 2012 02:09:12 -0700, zlf said:

>I need to call vtkImageReslice in a high frequency (30 times per second).
>The problem I meet is the CPU is nearly 100% once I start to run
>vtkImageReslice.
>
>1. I need only translation. No rotation and scale. I thought it will be much
>faster if the translation value specified is integral multiple of spacing.
>e.g: (0,0,image->GetSpacing()[2]). But my test result says no.
>
>2. Lower resolution is acceptable as well.
>
>Anyway to accelerate it?

The best approach is to measure what exactly is slow.  For that, you need to use a profiler:
http://en.wikipedia.org/wiki/Profiling_(computer_programming)

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada