topic HI Adriaan, in Intel® Integrated Performance Primitives

ippiCopy_8u_C1C4R

Adriaan_van_Os — Wed, 25 Apr 2018 06:13:52 GMT

What is ippiCopy_8u_C1C4R supposed to do ? If it is supposed to copy one channel (of a one-channel image) to multiple channels (of a multi-channel image) how is it different from ippiDup_8u_C1C4R ? And in that case, why was ippiDup_8u_C1C4R introduced ?

I noticed by the way that ippiCopy_8u_C1C4R doesn't work (for the supposed purpose) where ippiDup_8u_C1C4R does work.

Regards,

Adriaan van Os

HI Adriaan,

Chao_Y_Intel — Mon, 07 May 2018 16:29:25 GMT

HI Adriaan,
ippiCopy_8u_C1C4R only copy data from a one-channel image pSrc to only "one" channel of a multi-channel dst image. It you want to copy one channel (of a one-channel image) to multiple channels, it needs to use ippiDup functions.

Thanks,
Chao

Thanks for clarifying this.

Adriaan_van_Os — Mon, 07 May 2018 17:12:15 GMT

Thanks for clarifying this. This is a useful function in itself !

I suggest to change the wording in the manual "Case 5: Copying a one-channel image to a multi-channel image" to "Case 5: Copying a one-channel image to one channel a multi-channel image"

ippiCopy_xx_C1C4R doesn't have a channel parameter, but that doesn't matter much as the channel can be selected through an offset of the pDst parameter.

Regards,

Adriaan van Os

Hi Adriaan,

Igor_A_Intel — Tue, 08 May 2018 08:17:09 GMT

Hi Adriaan,

thank you, will be fixed in the manual.

regards, Igor

Also I suggest to add ippiDup

Adriaan_van_Os — Fri, 11 May 2018 08:15:22 GMT

Also I suggest to add ippiDup_16u_C1C4R and ippiDup_32f_C1C4R.

Regards,

Adriaan van Os