topic Re: ippiCopyConstBorder got wrong value in Intel® Integrated Performance Primitives

ippiCopyConstBorder got wrong value

adaTao — Fri, 16 Sep 2022 06:28:48 GMT

Hi,

The wrong value I got after calling function ippiCopyConstBorder_32f_C1R.

Code Example:

Got Wrong Value:

This problem has been bothering me for two days,

Thanks for any help！

Re: ippiCopyConstBorder got wrong value

NoorjahanSk_Intel — Mon, 19 Sep 2022 11:10:25 GMT

Hi,

Thanks for reaching out to us.

We looked into your code and made few changes to your code.

Since size of ipp32f is 4 Bytes, srcstep will be 32(i.e 8x4=32 Bytes) & dststep will be 28(i.e 7X4=28 Bytes).

where,

srcStep = 8 (Distance in bytes between starts of consecutive lines in the source image.)

dstStep= 7 (Distance, in bytes, between the starting points of consecutive lines in the destination image.)

Could you please try the below code and let us know if it helps?

#include<iostream> #include <stdio.h> #include<ipp.h> int main() { Ipp32f src[8 * 4] = { 3.5, 3.5, 3.5, 3.0, 3.0, 8.0, 8.0, 8.0, 3.0, 2.0, 1.0, 2.0, 3.0, 8.0, 8.0, 8.0, 3.0, 2.0, 1.0, 2.0, 3.0, 8.0, 8.0, 8.0, 3.0, 3.0, 3.0, 3.0, 3.0, 8.0, 8.0, 8.0 }; Ipp32f dst[8 * 6]={0}; IppiSize srcRoi = { 5, 4 }; IppiSize dstRoi = { 7, 6 }; int borderWidth = 1; int borderHeight = 1; int borderVal = 0; ippiCopyConstBorder_32f_C1R(src, 32, srcRoi, dst, 28, dstRoi, borderHeight, borderWidth, borderVal); for (int i = 0; i < 42; i++) { printf("%.1f ", dst[i]); if ((i + 1) % 7 == 0) printf("\n"); } }

Please find the below screenshot for the expected output.

Thanks & Regards,

Noorjahan.

Re: ippiCopyConstBorder got wrong value

adaTao — Tue, 20 Sep 2022 06:57:50 GMT

Very appreciated for your reply! It works now.

Re:ippiCopyConstBorder got wrong value

NoorjahanSk_Intel — Wed, 21 Sep 2022 06:33:53 GMT

Hi,

Thanks for the confirmation.

As this issue has been resolved, we will no longer respond to this thread. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Noorjahan