https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877564#M9735 <P>Other way, according to IPP manual, might be use of ippiMean_8u_C3CR function with specifying channel of interest (see coi parameter description).</P> <P>Vladimir</P> Mon, 17 Dec 2007 07:02:09 GMT Vladimir_Dudnik 2007-12-17T07:02:09Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877562#M9733 <P>Hi,</P> <P>How can I select the COI? For example, I have a 3 channel image and I want to calculate the mean of only the second channel using ippiMean_8u_C1R. Could you please help me? Thanks</P> <P>Regards,</P> <P>Hadi</P> Sat, 15 Dec 2007 11:18:43 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877562#M9733 hadipardis 2007-12-15T11:18:43Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877563#M9734 One wayis copying the COI into a new array and then processing this new channel. But is there any faster way? Mon, 17 Dec 2007 06:44:26 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877563#M9734 hadipardis 2007-12-17T06:44:26Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877564#M9735 <P>Other way, according to IPP manual, might be use of ippiMean_8u_C3CR function with specifying channel of interest (see coi parameter description).</P> <P>Vladimir</P> Mon, 17 Dec 2007 07:02:09 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877564#M9735 Vladimir_Dudnik 2007-12-17T07:02:09Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877565#M9736 Thanks, But I am looking for a general way. Your solution is not valid for many functions like ippiHistogramEven function. Now, what do you suggest me? Mon, 17 Dec 2007 07:13:45 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877565#M9736 hadipardis 2007-12-17T07:13:45Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877566#M9737 <P>Processing of channel of interest requires special branch in code, it is the reason why we have dedicated functions to work with COI (they have specificator CnC in the name).</P> <P>In general, it was created not for all IPP functions.</P> <P>You may consider splitting multi-channel image into separate planes and do processing for each channel independently.</P> <P>You also can submit feature request for functions you think are important for your application on <A href="http://premier.intel.com">Intel Premier Support</A>, this will be considered at the next IPP verion planning stage. Please specify in your request what exactly you want to implement with IPP, so we may analyse and probably suggest you other solution.</P> <P>Vladimir</P> Mon, 17 Dec 2007 08:18:15 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877566#M9737 Vladimir_Dudnik 2007-12-17T08:18:15Z https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877567#M9738 <P>Ok, I do so. In the meantime do you have a quick solution for me. Suppose that I want to create a new image plane by ippimalloc and copy the R channel of another image to it. I want to do it as fast as possible. Thanks</P> Mon, 17 Dec 2007 09:29:56 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Choosing-the-COI-Channel-Of-Interest/m-p/877567#M9738 hadipardis 2007-12-17T09:29:56Z