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用cuda操作IplImage中的数据

noBugnoGain — Mon, 28 Dec 2009 02:58:00 GMT

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}

noBugnoGain 2009-12-28 10:58 发表评论

opencv联合cuda�q�行囑փ�混合操作

noBugnoGain — Fri, 25 Dec 2009 02:48:00 GMT

摘要: 1#include 2#include 3#include 4#include 5#include &... 阅读全文

noBugnoGain 2009-12-25 10:48 发表评论

SIFT��度�I�间

noBugnoGain — Sat, 04 Jul 2009 05:09:00 GMT

GSS and DoG scale space structures

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noBugnoGain 2009-07-04 13:09 发表评论

noBugnoGain — Wed, 13 May 2009 11:02:00 GMT
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noBugnoGain 2009-05-13 19:02 发表评论

noBugnoGain — Sat, 25 Apr 2009 13:36:00 GMT
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noBugnoGain 2009-04-25 21:36 发表评论

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用cuda操作IplImage中的数据

opencv联合cuda�q�行囑փ�混合操作

SIFT���度�I�间

SIFT��度�I�间