Hi erverybody, I have a little question, which I hope you can help me with:
I just started working with Cuda over OpenCV. As a part of my algorithm I need to calculate the Histogram of a certain region around each pixel.
So, I upload my image (1600*1600) to the gpu memory via
gpu_MainImage = new GpuMat();
gpu_MainImage->upload(*m_myImageStruct->mainImage);
Then, for every Pixel, that is far away from the border to have enough space around him, I call:
inline vector* m_Histogram(const GpuMat *tmpGpuMat, const Range *myRowRange, const Range *myColRange)
{
GpuMat GpuDest;
GpuMat pgu_partImage(*tmpGpuMat, *myRowRange,*myColRange);
cv::cuda::calcHist(pgu_partImage,GpuDest);
Mat* tmpMat = new Mat();
GpuDest.download(*tmpMat);
vector *returnVector = new vector(*tmpMat);
normalize(*returnVector, *returnVector, 0, 1, NORM_MINMAX);
return returnVector;
}
This works fine for the first pixel, but crashes for the second pixel, saying:
> OpenCV Error: Gpu API call in hist::histogram256, file E:/....../src/cuda/hist.cu, line 106
Now, I kind of understand, that the adress of every object has to be a multiple of 8, but I dont know how to make sure of that. Can someone explain to me why the error occurses and how I can fix it?
↧