channel spilit and merge

gistfile1.txt

#include "ofMain.h"

#include "ofxCv.h"
using namespace ofxCv;
using namespace cv;

class ofApp : public ofBaseApp {
    
    ofImage image;
    
public:
    void setup()
    {
        image.loadImage("test.jpg");
        Mat mat = toCv(image);
        vector<Mat> rgb;
        cv::split(mat, rgb);
        vector<Mat> ggg;
        while (ggg.size() < 3)
            ggg.push_back(rgb[1]);
        merge(ggg, mat);
    }
    
    void update()
    {
        image.update();
    }
    
    void draw()
    {
        image.draw(0, 0);
    }
    
    void keyPressed(int key)
    {
        
    }
};

//========================================================================
int main( ){
	ofSetupOpenGL(1024,768,OF_WINDOW);			// <-------- setup the GL context
    
	// this kicks off the running of my app
	// can be OF_WINDOW or OF_FULLSCREEN
	// pass in width and height too:
	ofRunApp(new ofApp());
    
}