Question

我使用CUDA的统一内存概念（CudaMallocManaged）创建了两个gpumat。当我尝试调用convertTo函数时，它崩溃了，并出现以下错误，

what（）：OpenCV（3.4.2）/home/visionteam/revampedtarastack/source/build/opencv-3.4.2/modules/cudev/include/opencv2/cudev/grid/detail/transform.hpp:321：错误：（-217：Gpu API调用）函数'call'中遇到非法的内存访问

我在ubuntu18.04中尝试了cuda 10

Mat input = imread("sample.jpg",0);

uint8_t* h_a;

uint8_t* h_b;

cudaMallocManaged(&h_a, sizeof(uint8_t)*1280*720);

cudaMallocManaged(&h_b, sizeof(float)*1280*720);

cv::Mat left1(input.cols,input.rows,CV_8UC1,h_a);

h_a = (uint8_t*)input.data;

cv::cuda::GpuMat floatGPU(input.rows,input.cols,CV_32FC1,h_b);

cv::cuda::GpuMat leftGPU(input.rows,input.cols,CV_8UC1,h_a);

floatGPU.convertTo(leftGPU,CV_8U);

'

预期：转换成功。

实际值：what（）：OpenCV（3.4.2） /home/visionteam/revampedtarastack/source/build/opencv-3.4.2/modules/cudev/include/opencv2/cudev/grid/detail/transform.hpp:321：错误：（-217：Gpu API调用）非法内存在中遇到访问函数“通话”

编辑：

#include "iostream"
#include "stdio"
#include "opencv2/core/core.hpp"
#include "opencv2/cudastereo.hpp"
#include "opencv2/cudaarithm.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <cuda_runtime.h>
#include <sys/time.h>
#include <math.h>

using namespace cv;

int main(void)
{
  int rows = 480;
  int cols = 1280;
  float* h_a, *h_b, *h_c;

//Allocate memory for device pointers
cudaMallocManaged(&h_a, sizeof(float)*rows*cols);
cudaMallocManaged(&h_b, sizeof(float)*rows*cols);
cudaMallocManaged(&h_c, sizeof(float)*rows*cols);

//Mats (declaring them using pointers)
Mat hmat_a(Size(cols, rows), CV_32F, h_a);
hmat_a = imread("/home/vishnu/Desktop/color.png", 0);
Mat hmat_b(Size(cols, rows), CV_32F, h_b);
hmat_b = imread("/home/vishnu/Desktop/color.png", 0);
Mat hmat_c(Size(cols, rows), CV_32F, h_c);

//Gpu Mats (declaring with the same pointers!)
cuda::GpuMat dmat_a(Size(cols, rows), CV_32F, h_a);
cuda::GpuMat dmat_b(Size(cols, rows), CV_32F, h_b);
cuda::GpuMat dmat_c(Size(cols, rows), CV_32F, h_c);

cuda::multiply(dmat_a, dmat_b, dmat_c);

std::cout << hmat_c << endl;


return 0;
}

hmat_c也不会产生任何结果。我的代码出了什么问题。

使用cudamallocmanaged创建的gpumat时，无法在opencv gpumat中使用convertTo函数

0 个答案: