Hi Sebastian,<div><br></div><div>Could you please send me that .png file ?</div><div><br></div><div>   Thanks</div><div><br></div><div><br></div><div>        Luis<br><br><br>-----------------<br><div class="gmail_quote">On Wed, May 23, 2012 at 7:47 PM, Sebastian Losch <span dir="ltr">&lt;<a href="mailto:seb.losch@googlemail.com" target="_blank">seb.losch@googlemail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    Hi Luis!<br>
    <br>
    Thanks for your response. As i wrote in my first post the .png file
    is in the same folder as the executable, so that cannot be the
    reason. When i change the filename to something different (e.g. to a
    file which does not exists) then itk throws a different exception
    (file not found). <br>
    <br>
    Sebastian<br>
    <br>
    Am <a href="tel:24.05.2012%2001" value="+12405201201" target="_blank">24.05.2012 01</a>:40, schrieb Luis Ibanez:
    <div><div class="h5"><blockquote type="cite">Hi Sebastian,
      <div><br>
      </div>
      <div>You are using a plain filename (instead of a full path)</div>
      <div>to point to your image:</div>
      <div><br>
      </div>
      <div>
        <div><span style="white-space:pre-wrap"> </span>reader-&gt;SetFileName(&quot;input.png&quot;);</div>
        <div><br>
        </div>
        <br>
        The factories are telling you that the file</div>
      <div><br>
      </div>
      <div>                  &quot;input.png&quot;</div>
      <div><br>
      </div>
      <div>is not in the same directory that the executable </div>
      <div>that you build with Visual Studio.</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>You may want to try one of these tree options:</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>1) Use a full path to point to your image,</div>
      <div>     something like:</div>
      <div><br>
      </div>
      <div>               C:\MyImages\input.png</div>
      <div>   </div>
      <div>or</div>
      <div> </div>
      <div>2) Copy the image to where the executable is</div>
      <div><br>
      </div>
      <div>or</div>
      <div><br>
      </div>
      <div>3) Copy the executable to where the image is</div>
      <div>    and run the executable from that directory<br>
        <br>
        <br>
        <br>
        Option (1) is probably the best way to go.</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>Ideally your code should have been:</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>A) If using a command line approach</div>
      <div><br>
      </div>
      <div><span style="white-space:pre-wrap"> </span>reader-&gt;SetFileName(
        argv[1] );<br>
      </div>
      <div> </div>
      <div>or,</div>
      <div><br>
      </div>
      <div>B) If using a GUI to get the filename from the user:</div>
      <div><br>
      </div>
      <div>      const char * filename = GetMeAFileNameFromGUI();</div>
      <div><br>
        <div><span style="white-space:pre-wrap"> </span>reader-&gt;SetFileName(
          filename );<br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>   Hope this helps,</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>        Luis</div>
        <div><br>
        </div>
        <div><br>
        </div>
        -----------------------------------------<br>
        <div class="gmail_quote">On Tue, May 22, 2012 at 4:35 AM,
          Sebastian Losch <span dir="ltr">&lt;<a href="mailto:seb.losch@googlemail.com" target="_blank">seb.losch@googlemail.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
            Hi!
            <div><br>
            </div>
            <div>I am having problems getting the ImageFileReader and
              ImageFileWriter to work. I just want to read a PNG File,
              apply a filter and write it back to the harddrive. I found
              out that there is a problem in 4.1 with the ImageIOFactory
              registration, so i register the PNGFactory manually. The
              .png file is in the same folder as the executable. Here is
              my Code:</div>
            <div><br>
            </div>
            <div>
              <div>#include &quot;itkImage.h&quot;</div>
              <div>#include &quot;itkImageFileReader.h&quot;</div>
              <div>#include &quot;itkImageFileWriter.h&quot;</div>
              <div>#include &quot;itkCannyEdgeDetectionImageFilter.h&quot;</div>
              <div>#include &quot;itkObjectFactoryBase.h&quot;</div>
              <div>#include &quot;itkPNGImageIOFactory.h&quot;</div>
              <div><br>
              </div>
              <div>int main(int argc, char *argv[])</div>
              <div>{</div>
              <div><span style="white-space:pre-wrap"> </span>itk::ObjectFactoryBase::RegisterFactory(itk::PNGImageIOFactory::New());</div>
              <div><br>
              </div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>double
                variance = 2.0;</div>
              <div><span style="white-space:pre-wrap"> </span>double
                upperThreshold = 0.0;</div>
              <div><span style="white-space:pre-wrap"> </span>double
                lowerThreshold = 0.0;</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>typedef
                itk::Image&lt;double, 2&gt;  DoubleImageType;</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>typedef
                itk::ImageFileReader&lt;DoubleImageType&gt; ReaderType;</div>
              <div><span style="white-space:pre-wrap"> </span>ReaderType::Pointer
                reader = ReaderType::New();</div>
              <div><span style="white-space:pre-wrap"> </span>reader-&gt;SetFileName(&quot;input.png&quot;);</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>typedef
                itk::CannyEdgeDetectionImageFilter &lt;DoubleImageType,
                DoubleImageType&gt;</div>
              <div><span style="white-space:pre-wrap"> </span>CannyEdgeDetectionImageFilterType;</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>CannyEdgeDetectionImageFilterType::Pointer
                cannyFilter = CannyEdgeDetectionImageFilterType::New();</div>
              <div><span style="white-space:pre-wrap"> </span>cannyFilter-&gt;SetInput(reader-&gt;GetOutput());</div>
              <div><span style="white-space:pre-wrap"> </span>cannyFilter-&gt;SetVariance(
                variance );</div>
              <div><span style="white-space:pre-wrap"> </span>cannyFilter-&gt;SetUpperThreshold(
                upperThreshold );</div>
              <div><span style="white-space:pre-wrap"> </span>cannyFilter-&gt;SetLowerThreshold(
                lowerThreshold );</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>typedef
                itk::ImageFileWriter&lt;DoubleImageType&gt; WriterType;</div>
              <div><span style="white-space:pre-wrap"> </span>WriterType::Pointer
                writer = WriterType::New();</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>writer-&gt;SetFileName(&quot;test.png&quot;);</div>
              <div><span style="white-space:pre-wrap"> </span>writer-&gt;SetInput(cannyFilter-&gt;GetOutput());</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>try {</div>
              <div><span style="white-space:pre-wrap"> </span>writer-&gt;Update();</div>
              <div><span style="white-space:pre-wrap"> </span>} catch
                (itk::ExceptionObject &amp;e) {</div>
              <div><span style="white-space:pre-wrap"> </span>std::cerr
                &lt;&lt; e &lt;&lt; std::endl;</div>
              <div><span style="white-space:pre-wrap"> </span>}</div>
              <div><br>
              </div>
              <div><span style="white-space:pre-wrap"> </span>std::cout
                &lt;&lt; &quot;ENDE&quot; &lt;&lt; std::endl;</div>
              <div>}</div>
            </div>
            <div><br>
            </div>
            <div>and this is the error:</div>
            <div><br>
            </div>
            <div>
              <div>itk::ImageFileReaderException (0059E4A8)</div>
              <div>Location: &quot;void __thiscall
                itk::ImageFileReader&lt;class
                itk::Image&lt;double,2&gt;,class itk::DefaultConvertPixelTraits&lt;double&gt;
                &gt;::GenerateOutputInformation(void)&quot;</div>
              <div>File:
                c:\libs\itk\include\itk-4.1\itkimagefilereader.hxx</div>
              <div>Line: 143</div>
              <div>Description:  Could not create IO object for file
                input.png</div>
              <div>  Tried to create one of the following:</div>
              <div>    PNGImageIO</div>
              <div>  You probably failed to set a file suffix, or</div>
              <div>    set the suffix to an unsupported type.</div>
            </div>
            <div><br>
            </div>
            <div><br>
            </div>
            <div>What am i doing wrong?</div>
            <div><br>
            </div>
            <div>Thanks in advance, Sebastian</div>
            <br>
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            <br>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
  </div></div></div>

</blockquote></div><br></div>