Example Color Space

Example of how to convert between different color spaces in BoofCV. Either the whole image can be converted or individual values.

Example Code:

• ExampleColorSpace.java

Concepts:

• Color space

Relevant Examples:

• Color Segmentation

Example Code

/**
 * Simple demonstration for converting between color spaces in BoofCV. Currently RGB, YUV, HSV, and YCbCr are
 * supported.
 *
 * @author Peter Abeles
 */
public class ExampleColorSpace {
	public static void main( String[] args ) {
		BufferedImage image = UtilImageIO.loadImageNotNull(UtilIO.pathExample("sunflowers.jpg"));

		// Convert input image into a BoofCV RGB image
		Planar<GrayF32> rgb = ConvertBufferedImage.convertFromPlanar(image, null, true, GrayF32.class);

		//---- convert RGB image into different color formats
		Planar<GrayF32> hsv = rgb.createSameShape();
		ColorHsv.rgbToHsv(rgb, hsv);

		Planar<GrayF32> yuv = rgb.createSameShape();
		ColorYuv.yuvToRgb(rgb, yuv);

		//---- Convert individual pixels into different formats
		float[] pixelHsv = new float[3];
		ColorHsv.rgbToHsv(10, 50.6f, 120, pixelHsv);
		System.out.printf("Found RGB->HSV = %5.2f %5.3f %5.1f\n", pixelHsv[0], pixelHsv[1], pixelHsv[2]);

		float[] pixelRgb = new float[3];
		ColorHsv.hsvToRgb(pixelHsv[0], pixelHsv[1], pixelHsv[2], pixelRgb);
		System.out.printf("Found HSV->RGB = %5.1f %5.1f %5.1f expected 10 50.6 120\n",
				pixelRgb[0], pixelRgb[1], pixelRgb[2]);

		float[] pixelYuv = new float[3];
		ColorYuv.rgbToYuv(10, 50.6f, 120, pixelYuv);
		System.out.printf("Found RGB->YUV = %5.1f %5.1f %5.1f\n", pixelYuv[0], pixelYuv[1], pixelYuv[2]);

		ColorYuv.yuvToRgb(pixelYuv[0], pixelYuv[1], pixelYuv[2], pixelRgb);
		System.out.printf("Found YUV->RGB = %5.1f %5.1f %5.1f expected 10 50.6 120\n",
				pixelRgb[0], pixelRgb[1], pixelRgb[2]);
	}
}