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研究ノート メモメモ https://github.com/dotchang/

(メモ)OpenCV3.1で背景差分MOG2を使う時のサンプル

createBackgroundSubtractorMOG2なる関数を使うようです。

ofApp.h

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp{

	public:
		void setup();
		void update();
		void draw();

		void keyPressed(int key);
		void keyReleased(int key);
		void mouseMoved(int x, int y );
		void mouseDragged(int x, int y, int button);
		void mousePressed(int x, int y, int button);
		void mouseReleased(int x, int y, int button);
		void mouseEntered(int x, int y);
		void mouseExited(int x, int y);
		void windowResized(int w, int h);
		void dragEvent(ofDragInfo dragInfo);
		void gotMessage(ofMessage msg);

		cv::Mat frame;
		cv::Mat fgMask;
		cv::Ptr<cv::BackgroundSubtractorMOG2> pMOG2;
		cv::VideoCapture cap;
};

ofApp.cpp

#include "ofApp.h"

#include "opencv2/opencv.hpp"

#pragma comment(lib, "opencv_calib3d310.lib")
#pragma comment(lib, "opencv_core310.lib")
#pragma comment(lib, "opencv_features2d310.lib")
#pragma comment(lib, "opencv_flann310.lib")
#pragma comment(lib, "opencv_highgui310.lib")
#pragma comment(lib, "opencv_imgcodecs310.lib")
#pragma comment(lib, "opencv_imgproc310.lib")
#pragma comment(lib, "opencv_ml310.lib")
#pragma comment(lib, "opencv_objdetect310.lib")
#pragma comment(lib, "opencv_photo310.lib")
#pragma comment(lib, "opencv_shape310.lib")
#pragma comment(lib, "opencv_stitching310.lib")
#pragma comment(lib, "opencv_superres310.lib")
#pragma comment(lib, "opencv_ts310.lib")
#pragma comment(lib, "opencv_video310.lib")
#pragma comment(lib, "opencv_videoio310.lib")
#pragma comment(lib, "opencv_videostab310.lib")

//--------------------------------------------------------------
void ofApp::setup(){
	cap.open(1);
	if (!cap.isOpened()) {
		cout << "Can't open the camera" << endl;
		ofExit();
	}

	int history = 500;
	float varThreshold = 16;
	bool bShadowDetection = true;
	pMOG2 = cv::createBackgroundSubtractorMOG2(history, varThreshold, bShadowDetection);
	pMOG2->setVarThreshold(10);
}

//--------------------------------------------------------------
void ofApp::update(){
	if (cap.grab()) {
		cap >> frame;
	
		pMOG2->apply(frame, fgMask);
	}
}

//--------------------------------------------------------------
void ofApp::draw(){
	if (!fgMask.empty()) {
		cv::imshow("MOG2", fgMask);
	}
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){

}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){

}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){

}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 

}


パラメータ調整GUI付きサンプル

#pragma once

#include "ofMain.h"
#include "ofxGui.h"

#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp{

	public:
		void setup();
		void update();
		void draw();

		void keyPressed(int key);
		void keyReleased(int key);
		void mouseMoved(int x, int y );
		void mouseDragged(int x, int y, int button);
		void mousePressed(int x, int y, int button);
		void mouseReleased(int x, int y, int button);
		void mouseEntered(int x, int y);
		void mouseExited(int x, int y);
		void windowResized(int w, int h);
		void dragEvent(ofDragInfo dragInfo);
		void gotMessage(ofMessage msg);

		cv::Mat frame;
		cv::Mat fgMask;
		cv::Mat bgMask;
		cv::Ptr<cv::BackgroundSubtractorMOG2> pMOG2;
		cv::VideoCapture cap;

		ofxPanel gui;
		ofxFloatSlider  background_ratio;
		ofxFloatSlider  complexity_reduction_threshold;
		ofxToggle shadow_detection_flag;
		ofxIntSlider history;			// the number of last frames that affect the background model
		ofxIntSlider nMixtures;			// the number of gaussian components in the background model
		ofxFloatSlider shadow_threshold;
		ofxIntSlider shadow_value;
		ofxFloatSlider varInit;			// the initial variance of each gaussian component
		ofxFloatSlider varMax;
		ofxFloatSlider varMin;
		ofxFloatSlider varThreshold;	// the variance threshold for the pixel - model match
		ofxFloatSlider varThresholdGen;	// the variance threshold for the pixel - model match used for new mixture component generation.

		void BackgroundRatioChanged(float& value) { pMOG2->setBackgroundRatio(value); }
		void ComplexityReductionThresholdChanged(float& value) { pMOG2->setComplexityReductionThreshold(value); }
		void ShadowDetectionFlagChanged(bool& value) { pMOG2->setDetectShadows(value); }
		void HistoryChanged(int & value) { pMOG2->setHistory(value); }
		void nMixturesChanged(int & value) { pMOG2->setNMixtures(value); }
		void ShadowThresholdChanged(float & value) { pMOG2->setShadowThreshold(value); }
		void ShadowValueChanged(int & value) { pMOG2->setShadowValue(value); }
		void VarInitChanged(float & value) { pMOG2->setVarInit(value); }
		void VarMaxChanged(float & value) { pMOG2->setVarMax(value); varMin.setMax(value); }
		void VarMinChanged(float & value) { pMOG2->setVarMin(value); varMax.setMin(value); }
		void VarThresholdChanged(float & value) { pMOG2->setVarThreshold(value); }
		void VarThresholdGenChanged(float & value) { pMOG2->setVarThresholdGen(value); }		
};
#include "ofApp.h"

#include "opencv2/opencv.hpp"

#pragma comment(lib, "opencv_calib3d310.lib")
#pragma comment(lib, "opencv_core310.lib")
#pragma comment(lib, "opencv_features2d310.lib")
#pragma comment(lib, "opencv_flann310.lib")
#pragma comment(lib, "opencv_highgui310.lib")
#pragma comment(lib, "opencv_imgcodecs310.lib")
#pragma comment(lib, "opencv_imgproc310.lib")
#pragma comment(lib, "opencv_ml310.lib")
#pragma comment(lib, "opencv_objdetect310.lib")
#pragma comment(lib, "opencv_photo310.lib")
#pragma comment(lib, "opencv_shape310.lib")
#pragma comment(lib, "opencv_stitching310.lib")
#pragma comment(lib, "opencv_superres310.lib")
#pragma comment(lib, "opencv_ts310.lib")
#pragma comment(lib, "opencv_video310.lib")
#pragma comment(lib, "opencv_videoio310.lib")
#pragma comment(lib, "opencv_videostab310.lib")

//--------------------------------------------------------------
void ofApp::setup(){
	cap.open(1);
	if (!cap.isOpened()) {
		cout << "Can't open the camera" << endl;
		ofExit();
	}

	int initHistory = 500;
	float initVarThreshold = 16;
	bool bShadowDetection = true;
	pMOG2 = cv::createBackgroundSubtractorMOG2(initHistory, initVarThreshold, bShadowDetection);
	pMOG2->setVarThreshold(10);

	gui.setup("settings", "settings.xml", 10, 10);
	gui.add(background_ratio.setup("background ratio", pMOG2->getBackgroundRatio(), 0.0, 1.0));
	gui.add(complexity_reduction_threshold.setup("complexity reduction", pMOG2->getComplexityReductionThreshold(), 0.0, 1.0));
	gui.add(shadow_detection_flag.setup("shadow detection flag", pMOG2->getDetectShadows()));
	gui.add(history.setup("hisotry", pMOG2->getHistory(), 1, 1000));
	gui.add(nMixtures.setup("nMixtures", pMOG2->getNMixtures(), 1, 100));
	gui.add(shadow_threshold.setup("shadow threshold", pMOG2->getShadowThreshold(), -1.0, 1.0));
	gui.add(varInit.setup("varInit", pMOG2->getVarInit(), 0.0, 100.0));
	gui.add(varMax.setup("varMax", pMOG2->getVarMax(), pMOG2->getVarMin(), 10000.0));
	gui.add(varMin.setup("varMin", pMOG2->getVarMin(), 0.0, pMOG2->getVarMax()));
	gui.add(varThreshold.setup("varThreshold", pMOG2->getVarThreshold(), 0.0, 10000.0));
	gui.add(varThresholdGen.setup("varThresholdGen", pMOG2->getVarThresholdGen(), 0.0, 10000.0));

	background_ratio.addListener(this, &ofApp::BackgroundRatioChanged);
	complexity_reduction_threshold.addListener(this, &ofApp::ComplexityReductionThresholdChanged);
	shadow_detection_flag.addListener(this, &ofApp::ShadowDetectionFlagChanged);
	history.addListener(this, &ofApp::HistoryChanged);
	nMixtures.addListener(this, &ofApp::nMixturesChanged);
	shadow_threshold.addListener(this, &ofApp::ShadowThresholdChanged);
	varInit.addListener(this, &ofApp::VarInitChanged);
	varMax.addListener(this, &ofApp::VarMaxChanged);
	varMin.addListener(this, &ofApp::VarMinChanged);
	varThreshold.addListener(this, &ofApp::VarThresholdChanged);
	varThresholdGen.addListener(this, &ofApp::VarThresholdGenChanged);
}

//--------------------------------------------------------------
void ofApp::update(){
	if (cap.grab()) {
		cap >> frame;
	
		pMOG2->apply(frame, fgMask);
		pMOG2->getBackgroundImage(bgMask);
	}
}

//--------------------------------------------------------------
void ofApp::draw(){
	if (!fgMask.empty()) {
		cv::imshow("FG", fgMask);
	}
	if(!bgMask.empty()) {
		cv::imshow("BG", bgMask);
	}
	gui.draw();
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){
	
}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){

}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){

}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){

}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 

}

f:id:cvl-robot:20160418161225p:plain

OpenFrameworksのofxGuiとofParameterの仕様が変わってしまい、とても使いにくくなっていますね。
Qtでもあった現象ですが、綺麗にプログラムが書ける人がライブラリを書き直すと、プログラム的には美しくしくても使いづらい関数が続発するという悲しい事態に陥ります。方言を許容したまま開発を進めてほしいものです。

[1] OpenCV: segment_objects.cpp

今日の防災

Kindle版無料だそうですから、ダウンロードして一読しておくのが良いですね。

東京防災

東京防災

簡易トイレも買っておいた方が良いでしょうか。

サッと固まる非常用トイレ袋(30回分) 災害での断水時でもトイレが使える!

サッと固まる非常用トイレ袋(30回分) 災害での断水時でもトイレが使える!