[Paraview] Gray scale image & calculating area with ParaView

[Gita Das]

Dear Berk,
Thank you for your reply.
For a 3D surface mesh it shows surface area but when I cut a slice it
shows length possibly because it recognizes this as a line segment. Is
there any way to calculate the area inside this closed curve?
Regards,
Gita  

> > 1. When I download a 3D .mhd gray scale image with ParaView 
> 3.2.1, it
> > appears in colour. The option "Map Scalars" under Display option 
> can be
> > turned off with a .png image to have a grayscale one but this option
> > does not work (i.e. remains inactive) with the .mhd image. How 
> can I
> > view my image in gray scale?
> 
> This is probably a simple bug. Can you post an image we can test 
> this with?
> 
> > 2. I need to measure/calculate different areas of a slice of a 3D 
> mesh.> I found a filter called
> > "Integrate Variables" which does something but I am not sure exactly
> > what it does. Can anybody give me more information on this (e.g. 
> how it
> > calculates the area, the unit of measurement etc etc.).
> 
> For 2D meshes, this filter divides polygons to triangles and sums the
> area of all triangles. Since ParaView does not really support units,
> the area is based on the original units of the dataset. I am not sure
> how the mhd reader figures out spacing of the volume. Is it embedded
> in the file? You can find the dimensions of the volume under the
> information panel of the reader.
> 
> -berk
>