<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>as mentioned in my previous post<span style='color:#1F497D'> (</span></span><a href="http://vtk.1045678.n5.nabble.com/software-rendering-td5557078.html"><span lang=EN-US>http://vtk.1045678.n5.nabble.com/software-rendering-td5557078.html</span></a><span lang=EN-US> ), I observed different interpolation behaviors in software and hardware rendering of images in VTK. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Here you can see an example: <a href="http://cdash.mitk.org/testDetails.php?test=2749290&build=107877">http://cdash.mitk.org/testDetails.php?test=2749290&build=107877</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The test shows the result of an image rendered with software rendering. The input 5x5 pixel image is scaled (interpolated) to 8x8. If you render the same image with hardware support, a nearest neighbor interpolation will be applied and the result will look like the ValidImage on the bottom of the page. I don’t think that any interpolation can be considered wrong or right, but I think both, software and hardware rendering, should have a common default behavior. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Please can anyone comment on this? Is there any possibility to enforce the same interpolation in software rendering? For reliable testing in different environments it is necessary both rendering methods act with the same default behavior, since it is not deterministic whether your machine is able to render with hardware support or with software rendering. (For instance a VPN connection established to a windows machine blocks the GPU for some reason, Virtual Machines show different behavior etc.)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thomas<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>