[Insight-users] PNG from ITK

[Luis Ibanez]

Hi David,


Could you please give us more details on
what kind of "troubles" you have reading
the PNG files writen with ITK ?


It is a common mistake to save PNG files in
16 bits/pixel and try to view them with simple
viewers that do not normalize the intensity
levels. Those images appear black since they
only contain information in the low bits.

It is likely that when you edit and save the
files with a tool like GIMP, the new files
is an 8 bits/pixel PNG.


Please give us more information.


   Thanks


     Luis


-------------------------
David Macias Verde wrote:

> Hi all:
> 
> When applying, for instance, a Canny Edge Detector over a certain PNG
> image, and I give the result the same PNG format, why do I have troubles
> when trying to read that PNG image with the well known Amira software or
> even from VTK using vtkPNGReader? It happens with all the result images
> from any ITK algorithm related (i.e., Danielsson DM, etc.)
> 
> I have realize that if I edit that image into another graphic tool, like
> GIMP, and I overwrite it, then the file is readed without any trouble.
> 
> Thanks,
> 
> David Macias-Verde
> Hospital de Gran Canaria Dr. Negrin
> 
> 
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