JavaCV - Color based thresholding in image using OpenCV

JavaCV - Red color based thresholding (RGB-A space) in image using OpenCV : Full working java source code 


Note that the order of colors is BGR-A not RGB-A. 
Read it more from http://stackoverflow.com/questions/367449/bgr-color-space

#Similar example but on HSV-A space is given here :

//static imports
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_highgui.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
//non-static imports
import com.googlecode.javacv.cpp.opencv_core.CvScalar;
import com.googlecode.javacv.cpp.opencv_core.IplImage;

public class ColorDetect {
    //color range of red like color
    static CvScalar min = cvScalar(0, 0, 130, 0);//BGR-A
    static CvScalar max= cvScalar(140, 110, 255, 0);//BGR-A

    public static void main(String[] args) {
        //read image
        IplImage orgImg = cvLoadImage("colordetectimage.jpg");
        //create binary image of original size
        IplImage imgThreshold = cvCreateImage(cvGetSize(orgImg), 8, 1);
        //apply thresholding
        cvInRangeS(orgImg, min, max, imgThreshold);
        //smooth filter- median
        cvSmooth(imgThreshold, imgThreshold, CV_MEDIAN, 13);
        //save
        cvSaveImage("threshold.jpg", imgThreshold);
    }
}

Results:

Input image :

Input test image (red color will be detected )

//Red color detected output image

Red like color detected

#you can alter the range of red color (min, max) .