npp

问题 I am trying to sum all the pixels in an image, and get the average of all pixels using the CUDA NPP library. My image is an 8-bit unsigned char grayscale image of dimension w256 x h1024 . I have tried to follow all the required rules of declaring pointers and passing the corresponding NPP-type pointers to the NPP functions. However, I am getting an unknown error when I perform GPU error checking on my code. I tried to debug it but, I can't seem to figure out as to where I am going wrong, and

问题 I am trying to sum all the pixels in an image, and get the average of all pixels using the CUDA NPP library. My image is an 8-bit unsigned char grayscale image of dimension w256 x h1024 . I have tried to follow all the required rules of declaring pointers and passing the corresponding NPP-type pointers to the NPP functions. However, I am getting an unknown error when I perform GPU error checking on my code. I tried to debug it but, I can't seem to figure out as to where I am going wrong, and

问题 Nvidia Performance Primitives (NPP) provides the nppiFilter function for convolving a user-provided image with a user-provided kernel. For 1D convolution kernels, nppiFilter works properly. However, nppiFilter is producing a garbage image for 2D kernels. I used the typical Lena image as input: Here's my experiment with a 1D convolution kernel, which produces good output. #include <npp.h> // provided in CUDA SDK #include <ImagesCPU.h> // these image libraries are also in CUDA SDK #include

问题 I am new to cuda driver Api interface but I think that CUdeviceptr looks like a handle parameter.So I confused about the convertion between CUdeviceptr and npp8u *. Npp8u * src; ...... unsigned char temp; temp = src; CUdeviceptr devPtr; ....... devPtr = (CUdeviceptr)temp; I try to write the convertion like above,is that right! 回答1: cuDevicePtr is, in fact, a raw pointer, not a handle. You can see the original architect of the CUDA driver and driver API discuss this here (and school me in the

问题 The CUDA NPP library supports filtering of image using the nppiFilter_8u_C1R command but keep getting errors. I have no problem getting the boxFilterNPP sample code up and running. eStatusNPP = nppiFilterBox_8u_C1R(oDeviceSrc.data(), oDeviceSrc.pitch(), oDeviceDst.data(), oDeviceDst.pitch(), oSizeROI, oMaskSize, oAnchor); But if I change it to use nppiFilter_8u_C1R instead, eStatusNPP return the error -24 (NPP_TEXTURE_BIND_ERROR). The code below is the alterations I made to the original