https://community.intel.com/t5/Intel-Integrated-Performance/MarkSpeckles-maxPixDiff-behaviour/m-p/1147431#M26256 <P>IPP18.1</P><P>Microsoft Visual Studio 2015</P><P>&nbsp;</P><P>&nbsp;</P><P>Does any body understand how the maxPixDiff paramter works in the markSpeckles function?</P><P>&nbsp;</P><P>Using the test image below I expected that for the image</P><P>- threshholded at 8194</P><P>&nbsp;- maxSpecklesSize of 300</P><P>&nbsp;</P><P>That a maxPixDiff value of &gt;25 would include the 'blue' (middle ring value 8240) portion of the image&nbsp; however</P><P>- setting the value to 24 finds the centre portion as expected</P><P>- setting 26 finds NOTHING (not even centre portion)</P><P>- setting 80 finds NOTHING (not even centre portion)</P><P>Note this behaviour is evident on other images (actual data) not just this test pattern</P><P>Any help understanding this would be appreciated</P><P><span class="lia-inline-image-display-wrapper" image-alt="testimageslice.png"><img src="https://community.intel.com/t5/image/serverpage/image-id/10652i7B429A67544B24A6/image-size/large?v=v2&amp;px=999&amp;whitelist-exif-data=Orientation%2CResolution%2COriginalDefaultFinalSize%2CCopyright" role="button" title="testimageslice.png" alt="testimageslice.png" /></span></P> Tue, 24 Mar 2020 16:37:28 GMT MCGregor__Andrew 2020-03-24T16:37:28Z https://community.intel.com/t5/Intel-Integrated-Performance/MarkSpeckles-maxPixDiff-behaviour/m-p/1147431#M26256 <P>IPP18.1</P><P>Microsoft Visual Studio 2015</P><P>&nbsp;</P><P>&nbsp;</P><P>Does any body understand how the maxPixDiff paramter works in the markSpeckles function?</P><P>&nbsp;</P><P>Using the test image below I expected that for the image</P><P>- threshholded at 8194</P><P>&nbsp;- maxSpecklesSize of 300</P><P>&nbsp;</P><P>That a maxPixDiff value of &gt;25 would include the 'blue' (middle ring value 8240) portion of the image&nbsp; however</P><P>- setting the value to 24 finds the centre portion as expected</P><P>- setting 26 finds NOTHING (not even centre portion)</P><P>- setting 80 finds NOTHING (not even centre portion)</P><P>Note this behaviour is evident on other images (actual data) not just this test pattern</P><P>Any help understanding this would be appreciated</P><P><span class="lia-inline-image-display-wrapper" image-alt="testimageslice.png"><img src="https://community.intel.com/t5/image/serverpage/image-id/10652i7B429A67544B24A6/image-size/large?v=v2&amp;px=999&amp;whitelist-exif-data=Orientation%2CResolution%2COriginalDefaultFinalSize%2CCopyright" role="button" title="testimageslice.png" alt="testimageslice.png" /></span></P> Tue, 24 Mar 2020 16:37:28 GMT https://community.intel.com/t5/Intel-Integrated-Performance/MarkSpeckles-maxPixDiff-behaviour/m-p/1147431#M26256 MCGregor__Andrew 2020-03-24T16:37:28Z https://community.intel.com/t5/Intel-Integrated-Performance/MarkSpeckles-maxPixDiff-behaviour/m-p/1147432#M26257 <P>Maybe you hit a bug. I am using ippiMarkSpeckles with good results (but didn't create specific test-cases). The API of the function is somewhat peculiar in that it doesn't write to a separate result mask but inline to the image itself. Therefore, I let the user choose between black, white and mid-gray pixels.</P><P>My two cents.</P><P>Regards,</P><P>Adriaan van Os</P><P>&nbsp;</P> Sat, 28 Mar 2020 14:46:40 GMT https://community.intel.com/t5/Intel-Integrated-Performance/MarkSpeckles-maxPixDiff-behaviour/m-p/1147432#M26257 Adriaan_van_Os 2020-03-28T14:46:40Z