topic Re: Color Conversion in Intel® Integrated Performance Primitives

Color Conversion

karabas — Wed, 12 May 2004 23:36:13 GMT

Intel IPP v4.0 mentions RGB565/RGB555 16/15bit color representations.

There are functions which can convert YCbCr to RGB565 and vice versa.

Unfortunately thereare no functions that can convert 24bit RGB/BGR to 16 bit RGB565 by truncation of least significant bits. Orusing zero paddingfor RGB565 to RGB/BGR conversion.It'srelatively easyto implement it.E.g. myMMX/SSE implementation is about 3X faster than optimized C implementation.

I think it's a good idea to add this type of functions to IPPI

Message Edited by karabas on 05-12-2004 09:40 AM

Re: Color Conversion

Intel_C_Intel — Thu, 13 May 2004 01:59:35 GMT

Thank you for your suggestions. It would be better to submit this as a feature request through the intel premier channel. So, your request will be analized for the planningof future IPP versions.

Regards,
Vladimir

Re: Color Conversion

costelha1 — Sat, 06 Aug 2005 00:40:49 GMT

Can't this be done using ippiConvert, ippiScale or ippiReduceBits? If yes, can you give an example for RGB24-->RGB555 and RGB555-->RGB24?

Thanks.

Re: Color Conversion

Vladimir_Dudnik — Wed, 24 Aug 2005 02:47:42 GMT

Hi,

unfortunately such operation can't be effectively done with existing IPP functions

Vladimir