Tiled rotate with smoothing has bad edges

[Evgeniy_Kosmin]

Hi,

ippiRotate gives me different results with single image rotation and tiled one. Tiled result has some artifacts on the edges.

Here is my code:

// Rotate on single image
{
  IppiRect dstBounds = {0, 0, pResult->GetWidth(), pResult->GetHeight()};
  IppStatus res = ippiRotate_8u_C3R(pSrcPixels, srcSize, stripe.GetStride(), srcBounds, pDstPixels, pResult->GetStride(), dstBounds, _angle, _xShift, _yShift, IPPI_INTER_CUBIC | IPPI_SMOOTH_EDGE);

  if (res < ippStsNoErr)
    EX_THROW(IppException(EX_PARAMS, res));
}

// Rotate on tiled image
{

  uint32_t tileSize = 15;

  uint32_t tileCountX = 15;

  uint32_t tileCountY = 15;

  for (uint32_t i = 0; i < tileCountY; i++)
  {
    for (uint32_t j = 0; j < tileCountX; j++)
      {
        IppiRect dstBounds = {i * tileSize, j * tileSize, tileSize, tileSize};

        IppStatus res = ippiRotate_8u_C3R(pSrcPixels, srcSize, stripe.GetStride(), srcBounds, pDstPixels, pResult->GetStride(), dstBounds, _angle, _xShift, _yShift, IPPI_INTER_CUBIC | IPPI_SMOOTH_EDGE);

        if (res < ippStsNoErr)
            EX_THROW(IppException(EX_PARAMS, res));
      }
  }
}

Without IPPI_SMOOTH_EDGE both results are equal.

Please correct me if I’m doing something wrong.

Best regards,
Evgeniy Kosmin

[SergeyKostrov]

Hi Evgeniy, Some time ago we had a discussion ( please take a look ): Forum Topic: ippiRotate edge effects Web-link: software.intel.com/en-us/forums/topic/344452 and it looks like your problem is similar. Unfortunately, I don't know anything about status of the problem ( is it fixed? is it reproduced? ) and I expect Intel Software Engineers should provide more technical details. Best regards, Sergey

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