topic Image minimum size in Intel® Integrated Performance Primitives

Image minimum size

hochdorfer — Wed, 13 Jul 2005 15:01:10 GMT

Hello,

is there an minimum size for Ipp8u images. I want to create a Ipp8u image with an Pixel size of 60x29. When i use IppiMalloc to allocate memory, i get an imagestep of 64. Is there an posibility to create images with an size smaller than 64x64?

Siegfried

Re: Image minimum size

pascal_bamford — Tue, 26 Jul 2005 01:32:42 GMT

Siegfried,

The minimum size of an 8u image allocated with ippiMalloc is 32x1. The rows are 32 byte aligned for performance (read the "Performance Tricks and Tips" in the Technical articles section of the IPP homepage). pStepBytes will always be a multiple of 32 and therefore your requested image width will be rounded up to the nearest multiple.

Pascal.

Re: Image minimum size

hochdorfer — Tue, 26 Jul 2005 18:52:20 GMT

Thank you very much for your help.

Siegfried

Re: Image minimum size

Vladimir_Dudnik — Wed, 27 Jul 2005 16:41:44 GMT

Hi,

I need add correction, the minimal size of image which can be allocated with ippMalloc function is 1x1. But in memory such image will take 32x1 byte (as it was said -for performance reasons)

Regards,

Vladimir