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// 25MotionDetetion_ThreeDiff.cpp : 定义控制台应用程序的入口点。
//三帧差分法
#include <iostream>
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>
//CAM定义用摄像头获得视频else文件
//#define CAM
int apos=30;
void on_trackbar(int pos)
{
apos=pos;
}
int main( int argc, char** argv )
{
//声明IplImage指针
IplImage* pFrame = NULL; //原始视频帧
IplImage* pFrImg = NULL; //提取的前景图像,即运动目标
IplImage* pBkImg = NULL; //背景图像
IplImage* pMiImg = NULL; //中间帧图像
CvMat* pFrameMat = NULL; //原始视频矩阵
CvMat* pFrMat = NULL; //前景矩阵 第一帧
CvMat* pBkMat = NULL; //背景矩阵 第三帧
CvMat* pMiMat = NULL; //中间帧矩阵 第二帧
CvMat* pRe1Mat = NULL; //结果1
CvMat* pRe2Mat = NULL; //结果2
CvCapture* pCapture = NULL;
//帧数
int nFrmNum = 0;
//创建窗口
cvNamedWindow("video", 1);
cvNamedWindow("background",1);
cvNamedWindow("foreground",1);
//使窗口有序排列
cvMoveWindow("video", 30, 0);
cvMoveWindow("background", 360, 0);
cvMoveWindow("foreground", 690, 0);
// 滑动条
int nThreshold = 30;
cvCreateTrackbar("阀值", "foreground", &nThreshold, 100, on_trackbar);
if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
//打开摄像头
pCapture = cvCaptureFromCAM( argc == 2 ? argv[1][0] - '0' : 0 );
else if( argc == 2 )
//打开avi
pCapture = cvCaptureFromAVI( argv[1] );
if( !pCapture )
//打开视频流失败
{
fprintf(stderr,"Could not initialize capturing...\n");
return -1;
}
//逐帧读取视频
while(pFrame = cvQueryFrame( pCapture ))
{
nFrmNum++;
//如果是第一帧,需要申请内存,并初始化
if(nFrmNum == 1)
{
pBkImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pFrImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pBkMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrameMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pMiMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
//转化成单通道图像再处理
cvCvtColor(pFrame, pBkImg, CV_BGR2GRAY); //第一帧作为背景了
//cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY); //
//转换成矩阵
cvConvert(pBkImg, pFrameMat); //虽然没用,相当于给矩阵赋了初值
cvConvert(pBkImg, pFrMat); //虽然没用,相当于给矩阵赋了初值
cvConvert(pBkImg, pBkMat);
}
//如果是第er帧,需要申请内存,并初始化
else if(nFrmNum==2)
{
pMiImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pMiMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pRe1Mat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pRe2Mat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
cvCvtColor(pFrame, pMiImg, CV_BGR2GRAY);
cvConvert(pMiImg, pMiMat);
}
else
{
cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
cvConvert(pFrImg, pFrameMat);
//高斯滤波先,以平滑图像
//cvSmooth(pFrameMat, pFrameMat, CV_GAUSSIAN, 3, 0, 0);
//当前帧跟背景图相减 计算两个数组差的绝对值
cvAbsDiff(pMiMat, pBkMat, pRe1Mat);
cvAbsDiff(pFrameMat, pMiMat, pRe2Mat);
cvAnd(pRe1Mat,pRe2Mat,pFrMat,NULL);
//二值化前景图
cvThreshold(pFrMat, pFrImg, apos, 255.0, CV_THRESH_BINARY);
//进行形态学滤波,去掉噪音
//cvErode(pFrImg, pFrImg, 0, 1);
//cvDilate(pFrImg, pFrImg, 0, 1);
/*cvDilate(pFrImg, pFrImg, 0, 1);
cvErode(pFrImg, pFrImg, 0, 1); */
//更新背景
//cvRunningAvg(pFrameMat, pBkMat, 0.003, 0);
//将背景转化为图像格式,用以显示
cvConvert(pBkMat, pBkImg);
cvCopy(pMiMat,pBkMat,NULL);
cvCopy(pFrameMat,pMiMat,NULL);
//pBkMat=pFrameMat;
//显示图像
cvShowImage("video", pFrame);
cvShowImage("background", pBkImg);
cvShowImage("foreground", pFrImg);
//如果有按键事件,则跳出循环
//此等待也为cvShowImage函数提供时间完成显示
//等待时间可以根据CPU速度调整
if( cvWaitKey(20) >= 0 )
{
break;
}
}
}
cvWaitKey();
//销毁窗口
cvDestroyWindow("video");
cvDestroyWindow("background");
cvDestroyWindow("foreground");
//释放图像和矩阵
cvReleaseImage(&pFrImg);
cvReleaseImage(&pBkImg);
cvReleaseImage(&pMiImg);
cvReleaseMat(&pFrameMat);
cvReleaseMat(&pFrMat);
cvReleaseMat(&pBkMat);
cvReleaseMat(&pMiMat);
cvReleaseCapture(&pCapture);
return 0;
}
package com.jack.threediff;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;
import org.opencv.samples.colorblobdetect.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class DetectionActivity extends Activity implements
CvCameraViewListener2 {
private int nFrmNum = 0;// 帧数
private int nThreshold = 30;// 阈值
private SeekBar thrsh;
private Mat mRgba, mGray;
private Mat pFstMat, pSecMat, pThrMat;// 第一帧、第二帧、第三帧
private Mat pResMat1, pResMat2, pResAnd, out;
private Mat outWindow;
private Size wsize;
private CameraBridgeViewBase mOpenCvCameraView;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
mOpenCvCameraView.enableView();
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
@Override
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
nFrmNum++;
// mRgba做为背景图
mRgba = inputFrame.rgba();
Size sizeRgba = mRgba.size();
int rows = (int) sizeRgba.height;
int cols = (int) sizeRgba.width;
int left = cols / 8;
int top = rows / 8;
int width = cols * 3 / 4;
int height = rows * 3 / 4;
Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_BGR2GRAY);
if (nFrmNum == 1) {
pFstMat = mGray;
} else if (nFrmNum == 2) {
pSecMat = mGray;
} else {
pThrMat = mGray;
// 三帧差分
Core.subtract(pFstMat, pSecMat, pResMat1);
Core.subtract(pSecMat, pThrMat, pResMat2);
Core.bitwise_and(pResMat1, pResMat2, pResAnd);
// 二值化处理
Imgproc.threshold(pResAnd, out, nThreshold, 255.0, 0);
// 更新背景
pFstMat = pSecMat;
pSecMat = pThrMat;
}
if (out.size().height != 0) {
outWindow = out.submat(top, top + height, left, left + width);
wsize = out.size();
Imgproc.rectangle(outWindow, new Point(1, 1), new Point(
wsize.width - 2, wsize.height - 2), new Scalar(255, 0, 0,
255), 20);
// 边缘检测
Imgproc.Canny(mRgba, outWindow, 80, 90);
Imgproc.cvtColor(outWindow, mRgba, Imgproc.COLOR_GRAY2BGRA);
}
return mRgba;
}
@Override
public void onCameraViewStarted(int width, int height) {
mGray = new Mat();
pFstMat = new Mat();
pSecMat = new Mat();
pThrMat = new Mat();
pResMat1 = new Mat();
pResMat2 = new Mat();
pResAnd = new Mat();
out = new Mat();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.color_blob_detection_surface_view);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.color_blob_detection_activity_surface_view);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
thrsh = (SeekBar) findViewById(R.id.threshold1);
thrsh.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar arg0, int progress,
boolean arg2) {
nThreshold = progress;
}
});
}
public void onResume() {
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this,
mLoaderCallback);
};
@Override
public void onCameraViewStopped() {
}
}
<org.opencv.android.JavaCameraView
android:id="@+id/color_blob_detection_activity_surface_view"
android:layout_width="fill_parent"
android:layout_height="500dp" >
</org.opencv.android.JavaCameraView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="131dp"
android:orientation="vertical" >
<SeekBar
android:id="@+id/threshold1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:max="255"
android:progress="30" />
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ADADAD"
android:orientation="vertical" >
<org.opencv.android.JavaCameraView
android:id="@+id/color_blob_detection_activity_surface_view"
android:layout_width="fill_parent"
android:layout_height="500dp" >
</org.opencv.android.JavaCameraView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="131dp"
android:orientation="vertical" >
<SeekBar
android:id="@+id/threshold1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:max="255"
android:progress="30" />
</LinearLayout>
</LinearLayout>