[Paraview] Using threshold and warp by scalar

[Jason Haraldsen]

Thanks. That helped the png images (for the most part). I am still having
trouble with the tiff image.

J


On 7/27/11 9:32 PM, "David E DeMarle" <dave.demarle at kitware.com> wrote:

> Threshold requires scalars to threshold within, and tiff has RGBA data
> in it which ParaView thinks of as a vector (for the most part). You
> could use the calculator to compute a magnitude of that or pull out
> individual components and then the threshold filter will be available.
> Alternatively, in 3.10.2 you can turn on the auto convert properties
> preference and ParaView will do something similar for you.
> 
> The warp isn't available for the same reason and another. Besides
> lacking scalars to warp on, tiff files are read in as regularly
> structured image data, in which the point locations are not allowed to
> move around (if they were it wouldn't be regularly structured). So you
> also got to convert to an unstructured type to make it possible to
> move the points, after which the warp filter will be available. The
> tetrahedralize filter will do that for you, and the threshold filter
> does that for you as a side effect too.
> 
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
> 
> 
> 
> On Wed, Jul 27, 2011 at 10:39 PM, Jason Haraldsen
> <nuclearbologna at gmail.com> wrote:
>> I am trying to use warp by scalar and threshold filters on tiff and png
>> files. However, they are grayed out and not usable. Does anyone know if
>> there are specific inputs need? I got it to work with a different png file,
>> but others do not work.
>> 
>> Any help is greatly appreciated.
>> 
>> J
>> _______________________________________________
>> Powered by www.kitware.com
>> 
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>> 
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>> 
>> Follow this link to subscribe/unsubscribe:
>> http://www.paraview.org/mailman/listinfo/paraview
>> 
>>