implement erode to get rid of unwanted colors

[3501/OpenCVShowImage] / IsolateImage.java

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.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;

public class IsolateImage {

	public static Mat matOriginal;
	public static Mat filtered;
	public static Mat kernel;

	public static final Scalar LOWER_BOUNDS = new Scalar(169, 164, 103);
	public static final Scalar UPPER_BOUNDS = new Scalar(255, 229, 140);
	// public static final Scalar LOWER_BOUNDS = new Scalar(255, 0, 0);
	// public static final Scalar UPPER_BOUNDS = new Scalar(0, 255, 255);

	static {
		System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
	}

	public static void main(String args[]) throws Exception {

		matOriginal = new Mat();
		filtered = new Mat();

		kernel = Imgproc.getStructuringElement(Imgproc.MORPH_ELLIPSE, new Size(5, 5));

		processImage();
	}

	public static void processImage() {
		matOriginal = Imgcodecs.imread("imgs/testpicture.png"); // convert image
																// into matrix

		filtered = matOriginal;

		Core.inRange(matOriginal, LOWER_BOUNDS, UPPER_BOUNDS, filtered);
		Imgproc.erode(matOriginal, filtered, kernel, new Point(-1, -1), 2);

		Imgcodecs.imwrite("output.png", filtered);

	}
}