////////////////////////////////////////////////
//////////////////////////////////////////////////这是一个计算颜色直方图的程序,可以计算出一幅多通道图像的颜色直方图,但是目前还无法显示。
#include <StdAfx.h>
#include <cv.h>
#include <highgui.h>
#include <cxcore.h>
void main( int argc, char** argv )
{
IplImage *src = 0;
IplImage *histImg = 0;
CvHistogram *hist = 0;
int hdims[] = {256,256,256}; // 划分hist的个数,
// float hranges_arr[] = {0,256};
// float *hranges = hranges_arr;
float r_ranges[] = {0,255};
float g_ranges[] = {0,255};
float b_ranges[] = {0,255};
float* hranges[] = {r_ranges,g_ranges,b_ranges};
int aa=255;
int fdims[3]={aa,aa,aa};
float *pranges[]={r_ranges,g_ranges,b_ranges};
int i;
// 显示原图
src = cvLoadImage("C://test.bmp",3);
cvNamedWindow( "Histogram", 1 );
//创建直方图 c
hist = cvCreateHist(3,hdims,CV_HIST_ARRAY,hranges,1);
//计算直方图
IplImage *pold_B=cvCreateImage(cvGetSize(src),8,1);
IplImage *pold_G=cvCreateImage(cvGetSize(src),8,1);
IplImage *pold_R=cvCreateImage(cvGetSize(src),8,1);
IplImage *pall[]={pold_R,pold_G,pold_B};
cvSplit(src,pold_B,pold_G,pold_R,NULL);
cvCalcHist( pall, hist, 0, 0 );
// int r,g,b;
// for(i=0;i<=255;i++)
// cvGetHistValue_3D(hist,r,g,b);
cvShowImage( "Histogram", src );
cvWaitKey(0);
}
///////////////////////////////////////////////////////////////
以上为创建3通道直方图的代码,下面为单通道直方图的计算及相关的显示,和原图的显示代码
//////////////////////////////////////////////////////////////////////////
// 另外的显示图象的方法
//////////////////////////////////////////////////////////////////////////
CPaintDC dc(GetDlgItem(IDC_STATIC_KEY)); //用此句,得到picture控件的DC,图像将被绘制在控件上
CRect rcclient;
GetDlgItem(IDC_STATIC_KEY)->GetClientRect(&rcclient);
CDC memdc;
memdc.CreateCompatibleDC(&dc);
CBitmap bitmap;
hbmp = (HBITMAP)::LoadImage(AfxGetInstanceHandle(),
"c://test.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION|LR_LOADFROMFILE);
if( hbmp == NULL )
return ;
bitmap.Attach( hbmp );
// bitmap.CreateCompatibleBitmap(&dc, rcclient.Width(), rcclient.Height());
memdc.CreateCompatibleDC(&dc);
memdc.SelectObject( &bitmap );
// CWnd::DefWindowProc(WM_PAINT, (WPARAM)memdc.m_hDC , 0);
memdc.BitBlt( 0, 0, rcclient.Width(), rcclient.Height(), &memdc,
rcclient.left, rcclient.top, SRCCOPY);
/* CDC maskdc;
maskdc.CreateCompatibleDC(&dc);
CBitmap maskbitmap;
maskbitmap.CreateBitmap(rcclient.Width(), rcclient.Height(), 1, 1, NULL);
maskdc.SelectObject( &maskbitmap );
maskdc.BitBlt( 0, 0, rcclient.Width(), rcclient.Height(), &memdc,
rcclient.left, rcclient.top, SRCCOPY);
*/
//////////////////////////////////////////////////////////////////////////
/// 以下为显示图片和直方图,及其它
//////////////////////////////////////////////////////////////////////////
/* CPaintDC dc(this);// device context for painting
//GetDlgItem(IDC_STATIC_KEY)->GetClientRect(&m_ClientRect);
GetDlgItem(IDC_STATIC_KEY)->GetWindowRect(&m_ClientRect);
ScreenToClient(&m_ClientRect);
// CClientDC dc(GetDlgItem(IDC_STATIC_KEY));
CDC *memDC = new CDC;
// memDC = new CDC;
memDC->CreateCompatibleDC(&dc);
memDC->SelectObject(bm);
dc.StretchBlt(m_ClientRect.left,m_ClientRect.top,m_ClientRect.Width(),m_ClientRect.Height(),
memDC,0,0,bmMetric.bmWidth,bmMetric.bmHeight,SRCCOPY);
*/
/* if(bm->m_hObject!=NULL)
{
bm->GetBitmap(&bmMetric);
MessageBox("bmfeikong");
}
*/ //DeleteDC(memDC);
/* CRect m_ZhiFangTu;
CString out;
CBitmap bm,*pbm;
BITMAP bmMetric;
IplImage *src= 0;
CvHistogram *hist = 0;
int hdims = 50; // 划分HIST的个数,越高越精确
float hranges_arr[] = {0,255};
float* hranges = hranges_arr;
float max_val;
int i;
// m_pWnd=GetDlgItem(IDC_STATIC_KEY);
GetDlgItem(IDC_STATIC_KEY)->GetClientRect(&m_ClientRect);
CClientDC dc1(GetDlgItem(IDC_STATIC_KEY));
GetDlgItem(IDC_ZHIFANGTU)->GetClientRect(&m_ZhiFangTu);
CClientDC dc2(GetDlgItem(IDC_ZHIFANGTU));
CDC memDC;
if(m_FileName !="")
{
// m_FileName = "c://test.bmp";
HBITMAP hbmp = (HBITMAP)::LoadImage(AfxGetInstanceHandle(),
m_FileName, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION|LR_LOADFROMFILE);
if( hbmp == NULL )
MessageBox("加载位图失败!");
bm.Attach( hbmp );
bm.GetBitmap(&bmMetric);
memDC.CreateCompatibleDC(&dc1);
pbm=memDC.SelectObject(&bm);
dc1.StretchBlt(0,0,m_ClientRect.right,m_ClientRect.bottom,
&memDC,0,0,bmMetric.bmWidth,bmMetric.bmHeight,SRCCOPY);
memDC.SelectObject(pbm);
bm.DeleteObject();
memDC.DeleteDC();
//以上显示图片,下面计算颜色直方图,并且在框中显示
// 首先 得到框的位置
// 计算直方图
src = cvLoadImage(m_FileName, 0);
hist = cvCreateHist( 1, &hdims, CV_HIST_ARRAY, &hranges, 1 ); // 计算直方图
cvCalcHist( &src, hist, 0, 0 ); // 计算直方图
cvGetMinMaxHistValue( hist, 0, &max_val, 0, 0 ); // 只找最大值
cvConvertScale( hist->bins, hist->bins, max_val ? 255. / max_val : 0., 0 ); // 缩放 bin 到区间 [0,255]
for( i = 0; i < hdims; i++ )
{
double val = (cvGetReal1D(hist->bins,i)*m_ZhiFangTu.Height()/255 );
dc2.MoveTo(i*m_ZhiFangTu.Width()/50,m_ZhiFangTu.bottom);
dc2.LineTo(i*m_ZhiFangTu.Width()/50,m_ZhiFangTu.Height()-val);
}
}
else
MessageBox("m_FileName 为空");
*/
//////////////////////////////////////////////////////////////////////////
// 以上为显示图片和直方图
//////////////////////////////////////////////////////////////////////////