由于项目需要,进行过一段时间的 PariticalFilter 研究。主要的工作就是将网络上的Console代码和Mfc融合在一起,并且添加了Mfc端的控制功能。
程序还有不完善的地方,现将相关的函数发布出来,大家相互研究。
程序运行界面
程序的核心为两个部分,一个是核心PF函数,一个是界面操作
核心函数
/** @file
Definitions related to tracking with particle filtering
@author Rob Hess
@version 1.0.0-20060307
jsxyhelu 2016年11月修改 更多代码,请浏览jsxyhelu.cnblogs.com
jsxyhelu 2016年12月代码梳理,重构
*/
# include "stdafx.h"
# include "GOPF.h"
using namespace std;
using namespace cv;
//非常值得注意的一点是,本例中的指针的运用极大地提高了系统速度
//使用方法
/*//变量
int num_particles = 100;//狗的数目
int iFrame = 0;//当前为第几帧
Rect rectStart;//初始化矩形
Mat matFrame; //原始帧
Mat matClone; //原始帧复制
Mat matHSV; //原始帧的HSV形式
particle* particles, * new_particles;
//gsl初始化
gsl_rng* rng;
gsl_rng_env_setup();
rng = gsl_rng_alloc( gsl_rng_mt19937 );
gsl_rng_set( rng, time(NULL) );
//gsl初始化结束,rng为输出
//打开视频
VideoCapture videocapture;
videocapture.open("e:/sandbox/1.avi");
if (!videocapture.isOpened())
{
printf("视频打开失败!");
return -1;
}
//TODO
rectStart = Rect(449,86,21,13);
//主要循环
for (;;)
{
videocapture >> matFrame;
if (matFrame.empty())
break;
matClone = matFrame.clone();
imshow("原始图像",matFrame);
//step 0 当前帧转换为hsv模式,注意是在float下转换
matFrame.convertTo(matHSV,CV_32F,1.0/255);
cvtColor(matHSV,matHSV,COLOR_BGR2HSV);
//step 1 如果为第一帧,初始化相关数据
if (iFrame == 0)
{
//计算初始区域的粒子
histogram* ref_histos = compute_ref_histos( matHSV, rectStart);
particles = init_distribution( rectStart, ref_histos,1, num_particles );
iFrame = 1;
}
else
{
//step 2 放出100狗
for( int j = 0; j < num_particles; j++ )
{
//生成随机狗
particles[j] = transition( particles[j], matFrame.cols,matFrame.rows, rng );
float s = particles[j].s;
//计算相似性
particles[j].w = likelihood( matHSV, cvRound(particles[j].y),
cvRound( particles[j].x ),
cvRound( particles[j].width * s ),
cvRound( particles[j].height * s ),
particles[j].histo );
}
//step 3 重新规划
normalize_weights( particles, num_particles );
new_particles = resample( particles, num_particles );
free( particles );
particles = new_particles;
}
display_particle( &matClone, *particles );
imshow("结果图像",matClone);
waitKey(15);
iFrame = iFrame +1;
}*/
//根据hsv的bin的返回结果
int histo_bin( float h, float s, float v )
{
# define H_MAX 360. 0
# define S_MAX 1. 0
# define V_MAX 1. 0
# define S_THRESH 0. 1
# define V_THRESH 0. 2
int hd, sd, vd;
/* if S or V is less than its threshold, return a "colorless" bin */
vd = MIN( ( int)(v * NV / V_MAX), NV - 1 );
if( s < S_THRESH || v < V_THRESH )
return NH * NS + vd;
/* otherwise determine "colorful" bin */
hd = MIN( ( int)(h * NH / H_MAX), NH - 1 );
sd = MIN( ( int)(s * NS / S_MAX), NS - 1 ); return sd * NH + hd;
}
//计算直方图结果,因为所有的值都是计算成直方图,所以这个是核心算法(意味运行次数最多,优化最有效)
histogram * calc_histogram( IplImage * imgs, int n )
{
histogram * histo;
IplImage * h, * s, * v;
float * hist;
int i, r, c, bin;
histo = (histogram * )malloc( sizeof(histogram) );
histo - >n = NH *NS + NV;
hist = histo - >histo;
memset( hist, 0, histo - >n * sizeof( float) );
h = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
s = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
v = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
cvSplit( imgs, h, s, v, NULL );
/* increment appropriate histogram bin for each pixel */
for( r = 0; r < imgs - >height; r ++ )
for( c = 0; c < imgs - >width; c ++ )
{
bin = histo_bin( /*pixval32f( h, r, c )*/(( float *)(h - >imageData + h - >widthStep *r) )[c],
(( float *)(s - >imageData + s - >widthStep *r) )[c],
(( float *)(v - >imageData + v - >widthStep *r) )[c] );
hist[bin] += 1;
}
cvReleaseImage( &h );
cvReleaseImage( &s );
cvReleaseImage( &v );
return histo;
}
//直方图正定化
void normalize_histogram( histogram * histo )
{
float * hist;
float sum = 0, inv_sum;
int i, n;
hist = histo - >histo;
n = histo - >n;
/* compute sum of all bins and multiply each bin by the sum's inverse */
for( i = 0; i < n; i ++ )
sum += hist[i];
inv_sum = 1. 0 / sum;
for( i = 0; i < n; i ++ )
hist[i] *= inv_sum;
}
//计算n个histogram的数据结构
histogram * compute_ref_histos(Mat src , Rect rect )
{
IplImage matsrc(src);
IplImage * frame = &matsrc;
CvRect regions = (CvRect)rect;
histogram * histos = (histogram *) malloc( sizeof( histogram * ) );
IplImage * tmp;
cvSetImageROI( frame, regions );
tmp = cvCreateImage( cvGetSize( frame ), IPL_DEPTH_32F, 3 );
cvCopy( frame, tmp, NULL );
cvResetImageROI( frame );
histos = calc_histogram( tmp, 1 );
normalize_histogram( histos );
cvReleaseImage( &tmp );
return histos;
}
//初始化distribution
particle * init_distribution( Rect rect, histogram * histos, int n, int p)
{
CvRect regions = (CvRect)rect;
particle * particles;
int np;
float x, y;
int i, j, width, height, k = 0;
particles =(particle *) malloc( p * sizeof( particle ) );
np = p / n;
width = regions.width;
height = regions.height;
x = regions.x + width / 2;
y = regions.y + height / 2;
for( j = 0; j < np; j ++ )
{
particles[k].x0 = particles[k].xp = particles[k].x = x;
particles[k].y0 = particles[k].yp = particles[k].y = y;
particles[k].sp = particles[k].s = 1. 0;
particles[k].width = width;
particles[k].height = height;
particles[k].histo = histos;
particles[k ++].w = 0;
}
/* make sure to create exactly p particles */
i = 0;
while( k < p )
{
width = regions.width;
height = regions.height;
x = regions.x + width / 2;
y = regions.y + height / 2;
particles[k].x0 = particles[k].xp = particles[k].x = x;
particles[k].y0 = particles[k].yp = particles[k].y = y;
particles[k].sp = particles[k].s = 1. 0;
particles[k].width = width;
particles[k].height = height;
particles[k].histo = histos;
particles[k ++].w = 0;
i = ( i + 1 ) % n;
}
return particles;
}
//预测狗的位置
particle transition( particle p, int w, int h, gsl_rng * rng )
{
# define TRANS_X_STD 1. 0
# define TRANS_Y_STD 0. 5
# define TRANS_S_STD 0. 001
/* autoregressive dynamics parameters for transition model */
# define A1 2. 0
# define A2 - 1. 0
# define B0 1.0000
float x, y, s;
particle pn;
//采用 second-order 进行狗的估算
/* sample new state using second-order autoregressive dynamics */
x = A1 * ( p.x - p.x0 ) + A2 * ( p.xp - p.x0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_X_STD ) + p.x0;
pn.x = MAX( 0. 0, MIN( ( float)w - 1. 0, x ) );
y = A1 * ( p.y - p.y0 ) + A2 * ( p.yp - p.y0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_Y_STD ) + p.y0;
pn.y = MAX( 0. 0, MIN( ( float)h - 1. 0, y ) );
s = A1 * ( p.s - 1. 0 ) + A2 * ( p.sp - 1. 0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_S_STD ) + 1. 0;
pn.s = MAX( 0. 1, s );
pn.xp = p.x;
pn.yp = p.y;
pn.sp = p.s;
pn.x0 = p.x0;
pn.y0 = p.y0;
pn.width = p.width;
pn.height = p.height;
pn.histo = p.histo;
pn.w = 0;
return pn;
}
//histogram比较,马氏距离
float histo_dist_sq( histogram * h1, histogram * h2 )
{
float * hist1, * hist2;
float sum = 0;
int i, n;
n = h1 - >n;
hist1 = h1 - >histo;
hist2 = h2 - >histo;
for( i = 0; i < n; i ++ )
sum += sqrt( hist1[i] *hist2[i] );
return 1. 0 - sum;
}
//粒子比较
int particle_cmp( const void * p1, const void * p2 )
{
particle * _p1 = (particle *)p1;
particle * _p2 = (particle *)p2;
if( _p1 - >w > _p2 - >w )
return - 1;
if( _p1 - >w < _p2 - >w )
return 1;
return 0;
}
//相似性计算
float likelihood( Mat matSrc, int r, int c, int w, int h, histogram * ref_histo )
{
# define LAMBDA 20
IplImage matimg(matSrc);
IplImage * img = &matimg;
IplImage * tmp;
histogram * histo;
float d_sq;
/* extract region around (r,c) and compute and normalize its histogram */
cvSetImageROI( img, cvRect( c - w / 2, r - h / 2, w, h ) );
tmp = cvCreateImage( cvGetSize(img), IPL_DEPTH_32F, 3 );
cvCopy( img, tmp, NULL );
cvResetImageROI( img );
histo = calc_histogram( tmp, 1 );
cvReleaseImage( &tmp );
normalize_histogram( histo );
/* compute likelihood as e^{\lambda D^2(h, h^*)} */
d_sq = histo_dist_sq( histo, ref_histo );
free( histo );
return exp( -LAMBDA * d_sq );
}
//权值归一化
void normalize_weights( particle * particles, int n )
{
float sum = 0;
int i;
for( i = 0; i < n; i ++ )
sum += particles[i].w;
for( i = 0; i < n; i ++ )
particles[i].w /= sum;
}
//重新采样
particle * resample( particle * particles, int n )
{
particle * new_particles;
int i, j, np, k = 0;
//quick sort
qsort( particles, n, sizeof( particle ), &particle_cmp );
new_particles =(particle * ) malloc( n * sizeof( particle ) );
for( i = 0; i < n; i ++ )
{
np = cvRound( particles[i].w * n );
for( j = 0; j < np; j ++ )
{
new_particles[k ++] = particles[i];
if( k == n )
goto exit;
}
}
while( k < n )
new_particles[k ++] = particles[ 0];
exit :
return new_particles;
}
//显示PF的结果
void display_particle( Mat * img, particle p )
{
int x0, y0, x1, y1;
x0 = cvRound( p.x - 0. 5 * p.s * p.width );
y0 = cvRound( p.y - 0. 5 * p.s * p.height );
x1 = x0 + cvRound( p.s * p.width );
y1 = y0 + cvRound( p.s * p.height );
cv : :rectangle( *img,Point(x0,y0),Point(x1,y1),Scalar( 0, 0, 255));
}
Definitions related to tracking with particle filtering
@author Rob Hess
@version 1.0.0-20060307
jsxyhelu 2016年11月修改 更多代码,请浏览jsxyhelu.cnblogs.com
jsxyhelu 2016年12月代码梳理,重构
*/
# include "stdafx.h"
# include "GOPF.h"
using namespace std;
using namespace cv;
//非常值得注意的一点是,本例中的指针的运用极大地提高了系统速度
//使用方法
/*//变量
int num_particles = 100;//狗的数目
int iFrame = 0;//当前为第几帧
Rect rectStart;//初始化矩形
Mat matFrame; //原始帧
Mat matClone; //原始帧复制
Mat matHSV; //原始帧的HSV形式
particle* particles, * new_particles;
//gsl初始化
gsl_rng* rng;
gsl_rng_env_setup();
rng = gsl_rng_alloc( gsl_rng_mt19937 );
gsl_rng_set( rng, time(NULL) );
//gsl初始化结束,rng为输出
//打开视频
VideoCapture videocapture;
videocapture.open("e:/sandbox/1.avi");
if (!videocapture.isOpened())
{
printf("视频打开失败!");
return -1;
}
//TODO
rectStart = Rect(449,86,21,13);
//主要循环
for (;;)
{
videocapture >> matFrame;
if (matFrame.empty())
break;
matClone = matFrame.clone();
imshow("原始图像",matFrame);
//step 0 当前帧转换为hsv模式,注意是在float下转换
matFrame.convertTo(matHSV,CV_32F,1.0/255);
cvtColor(matHSV,matHSV,COLOR_BGR2HSV);
//step 1 如果为第一帧,初始化相关数据
if (iFrame == 0)
{
//计算初始区域的粒子
histogram* ref_histos = compute_ref_histos( matHSV, rectStart);
particles = init_distribution( rectStart, ref_histos,1, num_particles );
iFrame = 1;
}
else
{
//step 2 放出100狗
for( int j = 0; j < num_particles; j++ )
{
//生成随机狗
particles[j] = transition( particles[j], matFrame.cols,matFrame.rows, rng );
float s = particles[j].s;
//计算相似性
particles[j].w = likelihood( matHSV, cvRound(particles[j].y),
cvRound( particles[j].x ),
cvRound( particles[j].width * s ),
cvRound( particles[j].height * s ),
particles[j].histo );
}
//step 3 重新规划
normalize_weights( particles, num_particles );
new_particles = resample( particles, num_particles );
free( particles );
particles = new_particles;
}
display_particle( &matClone, *particles );
imshow("结果图像",matClone);
waitKey(15);
iFrame = iFrame +1;
}*/
//根据hsv的bin的返回结果
int histo_bin( float h, float s, float v )
{
# define H_MAX 360. 0
# define S_MAX 1. 0
# define V_MAX 1. 0
# define S_THRESH 0. 1
# define V_THRESH 0. 2
int hd, sd, vd;
/* if S or V is less than its threshold, return a "colorless" bin */
vd = MIN( ( int)(v * NV / V_MAX), NV - 1 );
if( s < S_THRESH || v < V_THRESH )
return NH * NS + vd;
/* otherwise determine "colorful" bin */
hd = MIN( ( int)(h * NH / H_MAX), NH - 1 );
sd = MIN( ( int)(s * NS / S_MAX), NS - 1 ); return sd * NH + hd;
}
//计算直方图结果,因为所有的值都是计算成直方图,所以这个是核心算法(意味运行次数最多,优化最有效)
histogram * calc_histogram( IplImage * imgs, int n )
{
histogram * histo;
IplImage * h, * s, * v;
float * hist;
int i, r, c, bin;
histo = (histogram * )malloc( sizeof(histogram) );
histo - >n = NH *NS + NV;
hist = histo - >histo;
memset( hist, 0, histo - >n * sizeof( float) );
h = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
s = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
v = cvCreateImage( cvGetSize(imgs), IPL_DEPTH_32F, 1 );
cvSplit( imgs, h, s, v, NULL );
/* increment appropriate histogram bin for each pixel */
for( r = 0; r < imgs - >height; r ++ )
for( c = 0; c < imgs - >width; c ++ )
{
bin = histo_bin( /*pixval32f( h, r, c )*/(( float *)(h - >imageData + h - >widthStep *r) )[c],
(( float *)(s - >imageData + s - >widthStep *r) )[c],
(( float *)(v - >imageData + v - >widthStep *r) )[c] );
hist[bin] += 1;
}
cvReleaseImage( &h );
cvReleaseImage( &s );
cvReleaseImage( &v );
return histo;
}
//直方图正定化
void normalize_histogram( histogram * histo )
{
float * hist;
float sum = 0, inv_sum;
int i, n;
hist = histo - >histo;
n = histo - >n;
/* compute sum of all bins and multiply each bin by the sum's inverse */
for( i = 0; i < n; i ++ )
sum += hist[i];
inv_sum = 1. 0 / sum;
for( i = 0; i < n; i ++ )
hist[i] *= inv_sum;
}
//计算n个histogram的数据结构
histogram * compute_ref_histos(Mat src , Rect rect )
{
IplImage matsrc(src);
IplImage * frame = &matsrc;
CvRect regions = (CvRect)rect;
histogram * histos = (histogram *) malloc( sizeof( histogram * ) );
IplImage * tmp;
cvSetImageROI( frame, regions );
tmp = cvCreateImage( cvGetSize( frame ), IPL_DEPTH_32F, 3 );
cvCopy( frame, tmp, NULL );
cvResetImageROI( frame );
histos = calc_histogram( tmp, 1 );
normalize_histogram( histos );
cvReleaseImage( &tmp );
return histos;
}
//初始化distribution
particle * init_distribution( Rect rect, histogram * histos, int n, int p)
{
CvRect regions = (CvRect)rect;
particle * particles;
int np;
float x, y;
int i, j, width, height, k = 0;
particles =(particle *) malloc( p * sizeof( particle ) );
np = p / n;
width = regions.width;
height = regions.height;
x = regions.x + width / 2;
y = regions.y + height / 2;
for( j = 0; j < np; j ++ )
{
particles[k].x0 = particles[k].xp = particles[k].x = x;
particles[k].y0 = particles[k].yp = particles[k].y = y;
particles[k].sp = particles[k].s = 1. 0;
particles[k].width = width;
particles[k].height = height;
particles[k].histo = histos;
particles[k ++].w = 0;
}
/* make sure to create exactly p particles */
i = 0;
while( k < p )
{
width = regions.width;
height = regions.height;
x = regions.x + width / 2;
y = regions.y + height / 2;
particles[k].x0 = particles[k].xp = particles[k].x = x;
particles[k].y0 = particles[k].yp = particles[k].y = y;
particles[k].sp = particles[k].s = 1. 0;
particles[k].width = width;
particles[k].height = height;
particles[k].histo = histos;
particles[k ++].w = 0;
i = ( i + 1 ) % n;
}
return particles;
}
//预测狗的位置
particle transition( particle p, int w, int h, gsl_rng * rng )
{
# define TRANS_X_STD 1. 0
# define TRANS_Y_STD 0. 5
# define TRANS_S_STD 0. 001
/* autoregressive dynamics parameters for transition model */
# define A1 2. 0
# define A2 - 1. 0
# define B0 1.0000
float x, y, s;
particle pn;
//采用 second-order 进行狗的估算
/* sample new state using second-order autoregressive dynamics */
x = A1 * ( p.x - p.x0 ) + A2 * ( p.xp - p.x0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_X_STD ) + p.x0;
pn.x = MAX( 0. 0, MIN( ( float)w - 1. 0, x ) );
y = A1 * ( p.y - p.y0 ) + A2 * ( p.yp - p.y0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_Y_STD ) + p.y0;
pn.y = MAX( 0. 0, MIN( ( float)h - 1. 0, y ) );
s = A1 * ( p.s - 1. 0 ) + A2 * ( p.sp - 1. 0 ) +
B0 * gsl_ran_gaussian( rng, TRANS_S_STD ) + 1. 0;
pn.s = MAX( 0. 1, s );
pn.xp = p.x;
pn.yp = p.y;
pn.sp = p.s;
pn.x0 = p.x0;
pn.y0 = p.y0;
pn.width = p.width;
pn.height = p.height;
pn.histo = p.histo;
pn.w = 0;
return pn;
}
//histogram比较,马氏距离
float histo_dist_sq( histogram * h1, histogram * h2 )
{
float * hist1, * hist2;
float sum = 0;
int i, n;
n = h1 - >n;
hist1 = h1 - >histo;
hist2 = h2 - >histo;
for( i = 0; i < n; i ++ )
sum += sqrt( hist1[i] *hist2[i] );
return 1. 0 - sum;
}
//粒子比较
int particle_cmp( const void * p1, const void * p2 )
{
particle * _p1 = (particle *)p1;
particle * _p2 = (particle *)p2;
if( _p1 - >w > _p2 - >w )
return - 1;
if( _p1 - >w < _p2 - >w )
return 1;
return 0;
}
//相似性计算
float likelihood( Mat matSrc, int r, int c, int w, int h, histogram * ref_histo )
{
# define LAMBDA 20
IplImage matimg(matSrc);
IplImage * img = &matimg;
IplImage * tmp;
histogram * histo;
float d_sq;
/* extract region around (r,c) and compute and normalize its histogram */
cvSetImageROI( img, cvRect( c - w / 2, r - h / 2, w, h ) );
tmp = cvCreateImage( cvGetSize(img), IPL_DEPTH_32F, 3 );
cvCopy( img, tmp, NULL );
cvResetImageROI( img );
histo = calc_histogram( tmp, 1 );
cvReleaseImage( &tmp );
normalize_histogram( histo );
/* compute likelihood as e^{\lambda D^2(h, h^*)} */
d_sq = histo_dist_sq( histo, ref_histo );
free( histo );
return exp( -LAMBDA * d_sq );
}
//权值归一化
void normalize_weights( particle * particles, int n )
{
float sum = 0;
int i;
for( i = 0; i < n; i ++ )
sum += particles[i].w;
for( i = 0; i < n; i ++ )
particles[i].w /= sum;
}
//重新采样
particle * resample( particle * particles, int n )
{
particle * new_particles;
int i, j, np, k = 0;
//quick sort
qsort( particles, n, sizeof( particle ), &particle_cmp );
new_particles =(particle * ) malloc( n * sizeof( particle ) );
for( i = 0; i < n; i ++ )
{
np = cvRound( particles[i].w * n );
for( j = 0; j < np; j ++ )
{
new_particles[k ++] = particles[i];
if( k == n )
goto exit;
}
}
while( k < n )
new_particles[k ++] = particles[ 0];
exit :
return new_particles;
}
//显示PF的结果
void display_particle( Mat * img, particle p )
{
int x0, y0, x1, y1;
x0 = cvRound( p.x - 0. 5 * p.s * p.width );
y0 = cvRound( p.y - 0. 5 * p.s * p.height );
x1 = x0 + cvRound( p.s * p.width );
y1 = y0 + cvRound( p.s * p.height );
cv : :rectangle( *img,Point(x0,y0),Point(x1,y1),Scalar( 0, 0, 255));
}
界面处理相关
void CGOMfcTemplate2Dlg
:
:OnMouseMove(UINT nFlags, CPoint point)
{
CRect rect_ctr;
( this - >GetDlgItem(IDC_CAM)) - >GetWindowRect( &rect_ctr); //获取Picture控件相对屏幕左上角的坐标,
ScreenToClient(rect_ctr); //获取Picture控件相对对话框客户区左上角的坐标
instant_position.x = point.x;
instant_position.y = point.y;
picture_ordinate_x = point.x - rect_ctr.left;
picture_ordinate_y = point.y - rect_ctr.top; //point获取的是鼠标相对对话框客户区左上角的坐标,减去rect_ctr.left和rect_ctr.top后,即为鼠标相对Picture控件左上角的坐标
if ((nFlags == MK_LBUTTON) && Is_LeftButton_Down)
{
: :SetCursor(cross);
CClientDC dc( this);
CBrush *OldBrush;
OldBrush =(CBrush *)dc.SelectStockObject(NULL_BRUSH);
dc.SetROP2(R2_NOT);
dc.Rectangle(CRect(chosen_position,instant_position));
dc.Rectangle(CRect(chosen_position,point));
dc.SelectObject(OldBrush);
instant_position =point;
}
else
: :SetCursor(arrow);
CDialogEx : :OnMouseMove(nFlags, point);
}
void CGOMfcTemplate2Dlg : :OnLButtonDown(UINT nFlags, CPoint point)
{
Is_LeftButton_Down = true;
: :SetCursor(cross);
chosen_position = instant_position = point;
CDialogEx : :OnLButtonDown(nFlags, point);
}
void CGOMfcTemplate2Dlg : :OnLButtonUp(UINT nFlags, CPoint point)
{
if (Is_LeftButton_Down)
{
Is_LeftButton_Down = false;
: :SetCursor(arrow);
CClientDC dc( this);
CPen * pOldPen =(CPen *)dc.SelectObject( &pen);
dc.MoveTo(chosen_position);
dc.LineTo(chosen_position.x,instant_position.y);
dc.LineTo(instant_position);
dc.LineTo(instant_position.x,chosen_position.y);
dc.LineTo(chosen_position);
//写到rect_res中区
int rect_x = min(chosen_position.x,instant_position.x);
int rect_y = min(chosen_position.y,instant_position.y);
int rect_w = abs(chosen_position.x - instant_position.x);
int rect_h = abs(chosen_position.y - instant_position.y);
rectStart = Rect(rect_x,rect_y,rect_w,rect_h);
}
CDialogEx : :OnLButtonUp(nFlags, point);
}
{
CRect rect_ctr;
( this - >GetDlgItem(IDC_CAM)) - >GetWindowRect( &rect_ctr); //获取Picture控件相对屏幕左上角的坐标,
ScreenToClient(rect_ctr); //获取Picture控件相对对话框客户区左上角的坐标
instant_position.x = point.x;
instant_position.y = point.y;
picture_ordinate_x = point.x - rect_ctr.left;
picture_ordinate_y = point.y - rect_ctr.top; //point获取的是鼠标相对对话框客户区左上角的坐标,减去rect_ctr.left和rect_ctr.top后,即为鼠标相对Picture控件左上角的坐标
if ((nFlags == MK_LBUTTON) && Is_LeftButton_Down)
{
: :SetCursor(cross);
CClientDC dc( this);
CBrush *OldBrush;
OldBrush =(CBrush *)dc.SelectStockObject(NULL_BRUSH);
dc.SetROP2(R2_NOT);
dc.Rectangle(CRect(chosen_position,instant_position));
dc.Rectangle(CRect(chosen_position,point));
dc.SelectObject(OldBrush);
instant_position =point;
}
else
: :SetCursor(arrow);
CDialogEx : :OnMouseMove(nFlags, point);
}
void CGOMfcTemplate2Dlg : :OnLButtonDown(UINT nFlags, CPoint point)
{
Is_LeftButton_Down = true;
: :SetCursor(cross);
chosen_position = instant_position = point;
CDialogEx : :OnLButtonDown(nFlags, point);
}
void CGOMfcTemplate2Dlg : :OnLButtonUp(UINT nFlags, CPoint point)
{
if (Is_LeftButton_Down)
{
Is_LeftButton_Down = false;
: :SetCursor(arrow);
CClientDC dc( this);
CPen * pOldPen =(CPen *)dc.SelectObject( &pen);
dc.MoveTo(chosen_position);
dc.LineTo(chosen_position.x,instant_position.y);
dc.LineTo(instant_position);
dc.LineTo(instant_position.x,chosen_position.y);
dc.LineTo(chosen_position);
//写到rect_res中区
int rect_x = min(chosen_position.x,instant_position.x);
int rect_y = min(chosen_position.y,instant_position.y);
int rect_w = abs(chosen_position.x - instant_position.x);
int rect_h = abs(chosen_position.y - instant_position.y);
rectStart = Rect(rect_x,rect_y,rect_w,rect_h);
}
CDialogEx : :OnLButtonUp(nFlags, point);
}