topic Fast conversion + resizing from bgr24 to bgr32 in Intel® Integrated Performance Primitives

Fast conversion + resizing from bgr24 to bgr32

rustamse — Tue, 16 Nov 2010 10:35:10 GMT

How to convert fast frombgr24 bitmap to bgr32 bitmap ???

I use functionsippiResize_8u_C3R for resizing andippiSwapChannels_8u_C3C4R conversion (frombgr24 bitmap to bgr32 bitmap).

Downscaling works fast, but Upscaling works very slow for me.

I useIPPI_INTER_LINEAR interpolation in scaling.

Fast conversion + resizing from bgr24 to bgr32

Gaiger_Chen — Tue, 16 Nov 2010 10:48:56 GMT

HI

Do you Initialize the IPP?

You could just use the fellow function, maybe it is helpful for you.

void SetUpIpp(void)
{

IppCpuType cpu;
cpu = ippGetCpuType();
ippInitCpu(cpu);
ippEnableCpu(cpu);
ippInit();

}/*SetUpIpp*/

Fast conversion + resizing from bgr24 to bgr32

rustamse — Tue, 16 Nov 2010 13:41:28 GMT

Thank you, for answer, but it doesn't help me...

Can anyone help me?

Fast conversion + resizing from bgr24 to bgr32

Vladimir_Dudnik — Tue, 16 Nov 2010 15:46:02 GMT

We actually recommend to use ippiResizeSqrPixel function instead of ippiResize (which is marked as deprecated and might be removed from future releases)

Vladimir

Fast conversion + resizing from bgr24 to bgr32

Thomas_Jensen1 — Tue, 16 Nov 2010 16:33:14 GMT

Do you know what part it is, that is slow? Resize or converting from C3 to AC4?

I think that SwapChannels must be slower than ippi_Copy_8u_C3AC4R().

You should also test if Resize is slower in C3 than in AC4, and then choose to do Resize+Convert or Convert+Resize.

Fast conversion + resizing from bgr24 to bgr32

Gaiger_Chen — Tue, 16 Nov 2010 18:19:03 GMT

HI Vladimir:

In our application, we are very care the size of dll.

I have used IPP resize function as my resize dll:

If I use ippiResize as resize function, the dll size if about 400k. (use VS 2005 )
(include ipp_w7.h)

but if I use ippiResizeSqrPixel, the dll size is about 900k.

so.... the ippiResize does necessary...