if i in b: suanzi = 0 for o in range(cluster_number): suanzi = 1 + a * (1 - aaa[o]) U[i][j] = suanzi * dummy_dum / dummy_num + a * f[i][j]
时间: 2023-12-30 17:03:32 浏览: 80
这段代码看起来像是对一个矩阵进行聚类分析的算法。其中包含了一个循环,对每个元素进行处理。具体来说,代码中的变量`i`表示矩阵的行数,变量`j`表示矩阵的列数,变量`b`表示一个包含已知聚类中心的列表,变量`a`是一个常数,`aaa`和`U`是矩阵,`f`是一个用于计算聚类中心的矩阵,`cluster_number`表示聚类中心的数量。
在循环中,代码首先判断当前元素是否在已知聚类中心列表中,如果在,则将该元素的聚类指数设为0,表示该元素已经属于某个聚类中心。如果不在,则需要计算该元素的聚类指数。计算方法为:将所有聚类中心的聚类指数平均值作为基础值(即`dummy_dum / dummy_num`),然后乘以一个调整系数`suanzi`,最后再加上一个惩罚项`a * f[i][j]`。调整系数`suanzi`的计算方法为:将`1`减去当前元素与每个聚类中心的距离的最小值,再乘以`a`,最后加上`1`。这个调整系数的目的是让距离较近的聚类中心对当前元素的聚类指数有更大的贡献。
整个算法的目的是将矩阵中的元素按照距离聚类到若干个聚类中心中。
相关问题
void CMyImageView::OnBianyuan() { // TODO: 在此添加命令处理程序代码 CMyImageDoc* pDoc = GetDocument();//获取文档指针 ASSERT_VALID(pDoc); suanzi dlginputyuzhi;//定义阈值对话框类对象 dlginputyuzhi.DoModal();//弹出对话框 UpdateData(TRUE); if (pDoc->m_pDib == NULL) { AfxMessageBox("Error!"); return; } int mcols = pDoc->m_pDib->m_nCols; int mrows = pDoc->m_pDib->m_nRows; unsigned char* m_pData = NULL; m_pData = pDoc->m_pDib->pImgData; unsigned char* m_pDataOldPos = m_pData; unsigned char* a; int* b = NULL; int irows, jcols; int max = 0; int min = 255; vector<int>v; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { p = 4 * (*m_pData) - *(m_pData + 1) - *(m_pData - 1) - *(m_pData - mcols) - *(m_pData + mcols); if (p > dlginputyuzhi.suanzi_1) { v.push_back(0); } else { v.push_back(255); } } m_pData = m_pDataOldPos; } } int aq = 0; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { *m_pData = v[aq]; aq++; } m_pData = m_pDataOldPos; } } for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (irows>0&&irows<mrows-1&&jcols>0&&jcols<mcols-1) { if (*m_pData==0) { if (*(m_pData + 1) == 0 || *(m_pData - 1) == 0 || *(m_pData - mcols) == 0 || *(m_pData + mcols) == 0) { } else { *m_pData = 255; } } } m_pData = m_pDataOldPos; } } pDoc->UpdateAllViews(NULL); }仿照此代码,将其中的sobel算子改成Robert算子
void CMyImageView::OnBianyuan() {
// TODO: 在此添加命令处理程序代码
CMyImageDoc* pDoc = GetDocument();//获取文档指针
ASSERT_VALID(pDoc);
suanzi dlginputyuzhi;//定义阈值对话框类对象
dlginputyuzhi.DoModal();//弹出对话框
UpdateData(TRUE);
if (pDoc->m_pDib == NULL) {
AfxMessageBox("Error!");
return;
}
int mcols = pDoc->m_pDib->m_nCols;
int mrows = pDoc->m_pDib->m_nRows;
unsigned char* m_pData = NULL;
m_pData = pDoc->m_pDib->pImgData;
unsigned char* m_pDataOldPos = m_pData;
unsigned char* a;
int* b = NULL;
int irows, jcols;
int max = 0;
int min = 255;
vector<int>v;
for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) {
// Robert算子
p = abs(*m_pData - *(m_pData + mcols + 1)) + abs(*(m_pData + 1) - *(m_pData + mcols));
if (dlginputyuzhi.suanzi_1 != 0 && p > dlginputyuzhi.suanzi_1) {
v.push_back(0);
}
else {
v.push_back(255);
}
}
m_pData = m_pDataOldPos;
}
}
int aq = 0;
for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) {
*m_pData = v[aq];
aq++;
}
m_pData = m_pDataOldPos;
}
}
for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (irows > 0 && irows < mrows - 1 && jcols > 0 && jcols < mcols - 1) {
if (*m_pData == 0) {
if (*(m_pData + 1) == 0 || *(m_pData - 1) == 0 || *(m_pData - mcols) == 0 || *(m_pData + mcols) == 0) {
}
else {
*m_pData = 255;
}
}
}
m_pData = m_pDataOldPos;
}
}
pDoc->UpdateAllViews(NULL);
}
用C++,创建MFC,用prewitt算子锐化,仿照下面代码void CMyImageView::OnSobelsuanzi() { // TODO: 在此添加命令处理程序代码 CMyImageDoc* pDoc = GetDocument();//获取文档指针 ASSERT_VALID(pDoc); Prewittsuanzi dlginputyuzhi;//定义阈值对话框类对象 dlginputyuzhi.DoModal();//弹出对话框 UpdateData(TRUE); if (pDoc->m_pDib == NULL) { AfxMessageBox("Error!"); return; } int mcols = pDoc->m_pDib->m_nCols; int mrows = pDoc->m_pDib->m_nRows; unsigned char* m_pData = NULL; m_pData = pDoc->m_pDib->pImgData; unsigned char* m_pDataOldPos = m_pData; unsigned char* a; int* b = NULL; int irows, jcols; int max = 0; int min = 255; vector<int>v; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { p = (m_pData + mcols+1) + 2( * (m_pData + mcols )) + (m_pData + mcols - 1) - 2( * (m_pData - mcols)) - (m_pData - mcols - 1) - (m_pData - mcols + 1); q = 2( * (m_pData + 1)) + (m_pData + mcols + 1) + (m_pData - mcols + 1) - 2( * (m_pData - 1)) - (m_pData + mcols - 1) - (m_pData - mcols - 1); p = abs(p); q = abs(q); if (p > dlginputyuzhi.xyuzhi && q > dlginputyuzhi.yyuzhi) { v.push_back(0); } else { v.push_back(255); } } m_pData = m_pDataOldPos; } } int aq = 0; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { m_pData = v[aq]; aq++; } m_pData = m_pDataOldPos; } } pDoc->UpdateAllViews(NULL); },给出相应程序
好的,以下是用C++创建MFC应用程序,用prewitt算子锐化的示例代码,供您参考:
首先,您需要创建一个MFC应用程序,选择MFC应用程序向导,并按照向导提示进行设置和创建。创建完成后,在资源视图中添加一个对话框资源,用于显示阈值对话框。
然后,在对话框类的.h文件中添加以下代码,用于声明事件处理函数:
```
afx_msg void OnPrewittSuanzi();
```
在.cpp文件中添加以下代码,用于实现事件处理函数:
```
void CMyImageView::OnPrewittSuanzi()
{
CMyImageDoc* pDoc = GetDocument(); // 获取文档指针
ASSERT_VALID(pDoc);
CPrewittDlg dlgInputYuzhi; // 定义阈值对话框类对象
dlgInputYuzhi.DoModal(); // 弹出对话框
UpdateData(TRUE);
if (pDoc->m_pDib == NULL) {
AfxMessageBox("Error!");
return;
}
int mCols = pDoc->m_pDib->m_nCols;
int mRows = pDoc->m_pDib->m_nRows;
unsigned char* m_pData = NULL;
m_pData = pDoc->m_pDib->pImgData;
unsigned char* m_pDataOldPos = m_pData;
unsigned char* a;
int* b = NULL;
int iRows, jCols;
int max = 0;
int min = 255;
vector<int> v;
for (iRows = 0; iRows < mRows; iRows++) {
for (jCols = 0; jCols < mCols; jCols++) {
int j = 0;
int p = 0, q = 0;
m_pData += iRows * mCols + jCols;
j += iRows * mCols + jCols;
if (j > mCols && (j + 1) % mCols != 0 && j < (mRows * (mCols - 1))) {
p = (m_pData + mCols + 1) + 2 * (*(m_pData + mCols)) + (m_pData + mCols - 1) - 2 * (*(m_pData - mCols)) - (m_pData - mCols - 1) - (m_pData - mCols + 1);
q = 2 * (*(m_pData + 1)) + (m_pData + mCols + 1) + (m_pData - mCols + 1) - 2 * (*(m_pData - 1)) - (m_pData + mCols - 1) - (m_pData - mCols - 1);
p = abs(p);
q = abs(q);
if (p > dlgInputYuzhi.xyuzhi && q > dlgInputYuzhi.yyuzhi) {
v.push_back(0);
}
else {
v.push_back(255);
}
}
m_pData = m_pDataOldPos;
}
}
int aq = 0;
for (iRows = 0; iRows < mRows; iRows++) {
for (jCols = 0; jCols < mCols; jCols++) {
int j = 0;
int p = 0, q = 0;
m_pData += iRows * mCols + jCols;
j += iRows * mCols + jCols;
if (j > mCols && (j + 1) % mCols != 0 && j < (mRows * (mCols - 1))) {
m_pData = v[aq];
aq++;
}
m_pData = m_pDataOldPos;
}
}
pDoc->UpdateAllViews(NULL);
}
```
其中,CPrewittDlg是阈值对话框类,xyuzhi和yyuzhi是阈值控件的值。
最后,您需要在视图类的.h文件中添加以下代码,用于声明事件处理函数:
```
afx_msg void OnPrewittSuanzi();
```
在.cpp文件中添加以下代码,用于响应事件:
```
BEGIN_MESSAGE_MAP(CMyImageView, CScrollView)
// 其他消息映射
ON_COMMAND(ID_PREWITT_SUANZI, &CMyImageView::OnPrewittSuanzi)
END_MESSAGE_MAP()
```
在资源视图中,您需要添加一个菜单项,用于触发prewitt算子的事件处理函数,代码如下:
```
<MenuItem
Id="ID_PREWITT_SUANZI"
Type="Button"
Text="Prewitt算子"
Tooltip="执行Prewitt算子锐化"
BitmapResourceId="IDB_PREWITT"
/>
```
至此,您就可以编译和运行程序,并进行测试。如果有问题,可以通过调试来查找和解决。
希望这些信息能对您有所帮助。
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