opencv投影

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// OpencvTest.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "opencv/cv.h"
#include "opencv/highgui.h"
#include "opencv/ml.h"
#include <afx.h>
#include "math.h"

using namespace cv;
using namespace std;

Mat hp, vp;

void HProjection(const Mat& src, Mat& dst)
{
// accept only char type matrices
CV_Assert(src.depth() != sizeof(uchar));

dst.create(src.rows, 1, CV_32F);

int i, j;
const uchar* p;
float* p_dst;
p_dst = dst.ptr<float>(0);
for(i = 0; i < src.rows; i++)
{
  p = src.ptr<uchar>(i);
  p_dst[i] = 0;
  for(j = 0; j < src.cols; j++)
  {
   p_dst[i] += p[j];
  }
}
}

void VProjection(const Mat& src, Mat& dst)
{
CV_Assert(src.depth() != sizeof(uchar));
dst.create(1, src.cols, CV_32F);

int i,j;
const uchar* p;
float * p_dst = dst.ptr<float>(0);

for (i = 0; i < src.cols; i++)
{
  p_dst[i] = 0;
  for (j=0; j < src.rows; j++)
  {
   p = src.ptr<uchar>(j);
   p_dst[i] += p[i];

  }
  cout << p_dst[i] << endl;
}
}

int _tmain(int argc, _TCHAR* argv[])
{
Mat src1Test = (Mat_<uchar>(3,3) << 1,2,3,4,5,6,7,8,9);

HProjection(src1Test, hp);
VProjection(src1Test, vp);

cout << src1Test << endl;
cout << "hp:" << endl;
cout << hp << endl;
cout << "vp" << endl;
cout << vp << endl;

waitKey(0);
}

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