https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983789#M21608 Thanks for that information Pascal!<BR /><BR />Aristotel Tue, 02 Aug 2005 03:29:25 GMT greekgoddj 2005-08-02T03:29:25Z https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983787#M21606 Hello,<BR /><BR />I have been looking through the IPP Image processing manual and don't seem to find a function for transparency. I thoughts this was quite a common routine in image processing and that I might find it in the IPP. Is it called something else? ..I basically want to copy one image over another, specifying a particular colour to be treated as the transparent colour.<BR /><BR />Any ideas?<BR /><BR />Thanks,<BR /><BR />Aristotel<P>Message Edited by greekgoddj@hotmail.com on <SPAN class="date_text">07-21-2005</SPAN> <SPAN class="time_text">03:32 AM</SPAN></P> Thu, 21 Jul 2005 15:25:40 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983787#M21606 greekgoddj 2005-07-21T15:25:40Z https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983788#M21607 Aristotel,<BR /><BR />The term you are after is 'alpha'. This is the weighting factor used to combine images with transparent effect.<BR /><BR />IPP has extensive support for 4 channel images (RGBA where A is alpha). Perhaps start by looking at the functions in section 5 of ippiman.pdf under 'Alpha Composition'. <BR /><BR />Pascal. Tue, 26 Jul 2005 21:28:40 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983788#M21607 pascal_bamford 2005-07-26T21:28:40Z https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983789#M21608 Thanks for that information Pascal!<BR /><BR />Aristotel Tue, 02 Aug 2005 03:29:25 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Transparency/m-p/983789#M21608 greekgoddj 2005-08-02T03:29:25Z