ImageTransformerRotationExample.java

import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;

import javax.swing.JFrame;

import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamImageTransformer;
import com.github.sarxos.webcam.WebcamPanel;
import com.github.sarxos.webcam.WebcamResolution;
import com.github.sarxos.webcam.util.jh.JHFlipFilter;


/**
 * This example demonstrates how to use {@link WebcamImageTransformer} to rotate the image from
 * camera by using {@link JHFlipFilter} from Jerry Huxtable filters package.
 *
 * @author Bartosz Firyn (sarxos)
 */
public class ImageTransformerRotationExample implements WebcamImageTransformer {

	/**
	 * This is filter from JH Labs which flips buffered image 90 degrees clockwise. For more details
	 * please follow to the <a href="http://www.jhlabs.com/ip/filters/index.html">JH Labs Filters<a>
	 * home page (filters source code can be found <a
	 * href="https://github.com/axet/jhlabs">here</a>).
	 */
	private final BufferedImageOp filter = new JHFlipFilter(JHFlipFilter.FLIP_90CW);

	public ImageTransformerRotationExample() {

		// use VGA resolution

		Dimension size = WebcamResolution.VGA.getSize();

		// get default webcam and set image transformer to this (transformer will modify image after
		// it's received from webcam, in this case it will rotate it)

		Webcam webcam = Webcam.getDefault();
		webcam.setViewSize(size);
		webcam.setImageTransformer(this);
		webcam.open();

		// create window

		JFrame window = new JFrame("Test Rotation");

		// and webcam panel

		WebcamPanel panel = new WebcamPanel(webcam);
		panel.setFPSDisplayed(true);
		panel.setFitArea(true);

		// add panel to window

		window.add(panel);
		window.pack();
		window.setVisible(true);
		window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	@Override
	public BufferedImage transform(BufferedImage image) {

		// this will do rotation on image

		return filter.filter(image, null);
	}

	public static void main(String[] args) {
		new ImageTransformerRotationExample();
	}
}