Difference between revisions of "Example Color Space"

From BoofCV
Jump to navigationJump to search
(Created page with "Example of how to convert between different color spaces in BoofCV. Either the whole image can be coverted or individual values. Example Code: * [https://github.com/lessthan...")
 
m
 
(8 intermediate revisions by the same user not shown)
Line 1: Line 1:
Example of how to convert between different color spaces in BoofCV.  Either the whole image can be coverted or individual values.
Example of how to convert between different color spaces in BoofCV.  Either the whole image can be converted or individual values.


Example Code:
Example Code:
* [https://github.com/lessthanoptimal/BoofCV/blob/v0.14/examples/src/boofcv/examples/ExampleImageEnhancement.java ExampleImageEnhancement.java]
* [https://github.com/lessthanoptimal/BoofCV/blob/v0.40/examples/src/main/java/boofcv/examples/imageprocessing/ExampleColorSpace.java ExampleColorSpace.java]


Concepts:
Concepts:
* Color space
* Color space


Relevant Applets:
Relevant Examples:
* [[Applet Color Space| Color Space]]
* [[Example_Color_Segmentation| Color Segmentation]]


= Example Code =
= Example Code =
Line 20: Line 20:
  */
  */
public class ExampleColorSpace {
public class ExampleColorSpace {
 
public static void main( String[] args ) {
public static void main( String args[] ) {
BufferedImage image = UtilImageIO.loadImageNotNull(UtilIO.pathExample("sunflowers.jpg"));
BufferedImage image = UtilImageIO.loadImage("../data/applet/sunflowers.jpg");


// Convert input image into a BoofCV RGB image
// Convert input image into a BoofCV RGB image
MultiSpectral<ImageFloat32> rgb = ConvertBufferedImage.convertFromMulti(image, null, ImageFloat32.class);
Planar<GrayF32> rgb = ConvertBufferedImage.convertFromPlanar(image, null, true, GrayF32.class);
ConvertBufferedImage.orderBandsIntoRGB(rgb,image);


//---- convert RGB image into different color formats
//---- convert RGB image into different color formats
MultiSpectral<ImageFloat32> hsv = new MultiSpectral<ImageFloat32>(ImageFloat32.class,rgb.width,rgb.height,3);
Planar<GrayF32> hsv = rgb.createSameShape();
ColorHsv.rgbToHsv_F32(rgb, hsv);
ColorHsv.rgbToHsv(rgb, hsv);


MultiSpectral<ImageFloat32> yuv = new MultiSpectral<ImageFloat32>(ImageFloat32.class,rgb.width,rgb.height,3);
Planar<GrayF32> yuv = rgb.createSameShape();
ColorYuv.yuvToRgb_F32(rgb, yuv);
ColorYuv.yuvToRgb(rgb, yuv);


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


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


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

Latest revision as of 15:58, 17 January 2022

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

Example Code:

Concepts:

  • Color space

Relevant Examples:

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]);
	}
}