Example Color Space

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

Example Code:

• ExampleImageEnhancement.java

Concepts:

• Color space

Relevant Applets:

• Color Space

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.loadImage("../data/applet/sunflowers.jpg");

		// Convert input image into a BoofCV RGB image
		MultiSpectral<ImageFloat32> rgb = ConvertBufferedImage.convertFromMulti(image, null, ImageFloat32.class);
		ConvertBufferedImage.orderBandsIntoRGB(rgb,image);

		//---- convert RGB image into different color formats
		MultiSpectral<ImageFloat32> hsv = new MultiSpectral<ImageFloat32>(ImageFloat32.class,rgb.width,rgb.height,3);
		ColorHsv.rgbToHsv_F32(rgb, hsv);

		MultiSpectral<ImageFloat32> yuv = new MultiSpectral<ImageFloat32>(ImageFloat32.class,rgb.width,rgb.height,3);
		ColorYuv.yuvToRgb_F32(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]);
	}
}