<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello, <div><br></div><div>If you want to implement a single threaded ImageFilter you over-ride the GenerateData() method, if you want to implement a multi-threaded filter you over-ride the ThreadedGenerateData() method and optionally the BeforeThreadedGenerateData,() or the AfterThreadedGenerateData() methods. The ImageSource class over-rides the GenerateData() method to split the image and multi-thread the processing:</div><div><br></div><div><a href="https://github.com/Kitware/ITK/blob/master/Modules/Core/Common/include/itkImageSource.hxx#L251">https://github.com/Kitware/ITK/blob/master/Modules/Core/Common/include/itkImageSource.hxx#L251</a></div><div><br></div><div>For multi-threaded filters this ThreadedGenerateData() methods should produce the output region that is passed as a parameter, which the single threaded GenerateData() method should produce the output image(s)' requested regions.</div><div><br></div><div>The general guideline is to file an image filter which does a similar operation and use it as a model for implementing your own filter.</div><div><br></div><div>Brad</div><div><br><div><div>On Oct 10, 2012, at 6:09 AM, Dženan Zukić <<a href="mailto:dzenanz@gmail.com">dzenanz@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><font><font face="verdana,sans-serif">Take a look at these simple examples:</font></font><div><a href="http://www.itk.org/Wiki/ITK/Examples/Developer/MultiThreadedImageFilter">http://www.itk.org/Wiki/ITK/Examples/Developer/MultiThreadedImageFilter</a><font face="verdana, sans-serif"><br>
</font><div><a href="http://www.itk.org/Wiki/ITK/Examples/Developer/OilPaintingImageFilter">http://www.itk.org/Wiki/ITK/Examples/Developer/OilPaintingImageFilter</a></div><div><font><br></font><br><div class="gmail_quote">
On Wed, Oct 10, 2012 at 7:40 AM, Ashwath Hegde, ERS-HCLTech <span dir="ltr"><<a href="mailto:Ashwathh@hcl.com" target="_blank">Ashwathh@hcl.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">Hi All,<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I am new to ITK.I have written some image processing algorithms like binarization,contrast enchancement etc in C.<u></u><u></u></p><p class="MsoNormal">I want to apply threading concept on the algorithms which I have written in C so that they execute faster.<u></u><u></u></p><p class="MsoNormal">So I wanted to know how multithreading is applied on various filters in ITK,so that I can apply the same concept on my C algorithms.<u></u><u></u></p><p class="MsoNormal">I debugged the example “FlipImageFilter.cxx” to see if it was multithreaded but could find out much.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Kindly help me in this.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Regards,<u></u><u></u></p><p class="MsoNormal">Ashwath<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p></div><span style="FONT-FAMILY:'Arial','sans-serif';COLOR:gray;FONT-SIZE:7.5pt"><div style="margin: 0in 0in 0pt; "><br><br><font style="FONT-FAMILY:'Arial','sans-serif';COLOR:gray;FONT-SIZE:9px">::DISCLAIMER::<br>----------------------------------------------------------------------------------------------------------------------------------------------------</font></div><div style="margin: 0in 0in 0pt; "><font style="FONT-FAMILY:'Arial','sans-serif';COLOR:gray;FONT-SIZE:11px">The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only.<br>
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