1
#include <cutil_inline.h>
2#include <cv.h>
3#include <cstdio>
4#include <iostream>
5#include <cutil.h>
6#include <ctime>
7#include <cstdlib>
8#include <highgui.h>
9#include <windows.h>
10
11#pragma comment(lib, "cuda.lib")
12#pragma comment(lib, "cudart.lib")
13#pragma comment(lib, "cutil32.lib")
14#pragma comment(lib, "cv.lib")
15#pragma comment(lib, "cxcore.lib")
16#pragma comment(lib, "highgui.lib")
17
18using namespace std;
19
20__global__ void mainKernel(unsigned char *d_data, int widthStep, int width, int height)
21
{
22
unsigned int x = blockIdx.x*blockDim.x+threadIdx.x;
23 unsigned int y = blockIdx.y*blockDim.y+threadIdx.y;
24 if( x>0 && x < width && y>0 && y < height )
25
{
26 d_data[y*widthStep+x*3+0] ^= ( ((x&0x0F)==0) ^ ((y&0x0F)==0) ) *255;
27 d_data[y*widthStep+x*3+1] ^= ( ((x&0x0F)==0) ^ ((y&0x0F)==0) ) *255;
28 d_data[y*widthStep+x*3+2] ^= ( ((x&0x0F)==0) ^ ((y&0x0F)==0) ) *255;
29
}
30
}
31
32int main()
33{
34 IplImage* src = cvLoadImage("IMG_03.JPG");
35
36 int widthStep = src->widthStep;
37 int width = src->width;
38 int height = src->height;
39
40 printf("before widthStep = %d\n", widthStep);
41 if( widthStep%4 != 0)
42 {
43 widthStep = (1+widthStep/4)*4;
44 }
45 printf("after widthStep = %d\n", widthStep);
46
47 unsigned char* d_img_data;
48 CUDA_SAFE_CALL(cudaMalloc((void**)&d_img_data, widthStep*height));
49 CUDA_SAFE_CALL(cudaMemcpy(d_img_data, src->imageData, widthStep*height, cudaMemcpyHostToDevice));
50
51 dim3 dimBlock(16, 16, 1);
52 dim3 dimGrid( (width+dimBlock.x-1)/dimBlock.x, (height+dimBlock.y-1)/dimBlock.y );
53 mainKernel<<<dimGrid, dimBlock, 0>>>(d_img_data, widthStep, width, height);
54 CUDA_SAFE_CALL(cudaThreadSynchronize());
55
56 CUDA_SAFE_CALL( cudaMemcpy( src->imageData, d_img_data, widthStep*height, cudaMemcpyDeviceToHost) );
57
58 cvNamedWindow("test",CV_WINDOW_AUTOSIZE);
59 cvShowImage("test",src);
60 cvWaitKey(0);
61 cvDestroyAllWindows();
62
63 cvReleaseImage(&src);
64 CUDA_SAFE_CALL(cudaFree(d_img_data));
65 return 0;
66}
posted on 2009-12-28 10:58
noBugnoGain 閱讀(1803)
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