opencv获取mat的指针_opencv中Mat类型与指针在cudaMemcpy的传递

using namespace std;

using namespace cv;

#include //图像大小

#define DATA_W 512

#define DATA_H 512

//thread

#define N 16

__global__ void MediaFilter(uchar* In,uchar* Out, int Width, intHeight)

{

ucharwindow[9];

unsigned int x=blockIdx.x * blockDim.x+ threadIdx.x;

unsigned int y=blockIdx.y * blockDim.y+ threadIdx.y;

//中值滤波

if(x>=Width && y>=Height) {printf("break %s\n","");return;}

window[0]=(y==0||x==0)?0:In[(y - 1 ) * Width + x - 1];

window[1]=(y==0)?0:In[( y - 1 ) * Width + x ];

window[2]=(y==0||x==DATA_W-1)?0:In[( y - 1 ) * Width + x + 1 ];

window[3]=(x=0)?0:In[y * Width + x ];

window[4]=In[y * Width + x ];

window[5]=(x==DATA_W-1)?0:In[y * Width + x + 1 ];

window[6]=(y==DATA_H-1|| x == 0)?0:In[ (y + 1 ) * Width + x - 1 ];

window[7]=(y==DATA_H-1)?0:In[( y + 1 ) * Width + x];

window[8]=(y==DATA_H-1||x==DATA_W-1)?0:In[( y + 1 ) * Width + x + 1 ];

for (unsigned int j = 0; j < 5; ++j)

{

int min1 = j;

for (unsigned int l=j+1; l<9; ++l)

{

if (window[l] < window[min1] )

{

min1= l;

}

}

const uchar temp = window[j];

window[j]= window[min1];

window[min1]= temp;

}

Out[y*Width+ x] = window[4];

}

int main()

{

Mat Img =imread("C:\\Users\\scczyy\\Desktop\\study\\ImageMedia\\lena512.bmp",1);

cvtColor(Img,Img,CV_BGR2GRAY);

int Height = Img.rows;

int Width = Img.cols;

int Len = Height*Width;

int MemSize = Len*sizeof(uchar);

printf("data type is %i\n",Img.type());

printf(" the image width is %i\n the image height is%i\n",Width,Height);

uchar*dev_Img;

uchar*dev_OutImg;

cudaMalloc((void**)&dev_Img,MemSize);

cudaMalloc((void**)&dev_OutImg,MemSize);

cudaMemcpy(dev_Img,Img.data,MemSize,cudaMemcpyHostToDevice);

dim3 threadsPerBlock(N,N);

dim3 blocks((Width+threadsPerBlock.x-1)/threadsPerBlock.x, (Height+threadsPerBlock.y-1)/threadsPerBlock.y);

MediaFilter<<>>(dev_Img,dev_OutImg,Width,Height);

Mat OutImg =Mat::zeros(Img.rows,Img.cols, CV_8UC1);

cudaMemcpy(OutImg.data,dev_OutImg,MemSize,cudaMemcpyDeviceToHost);

imshow("中值滤波",OutImg);

waitKey(0);

cudaFree(dev_Img);

cudaFree(dev_OutImg);

return 0;

}解决啦，红色部分错啦