Java RGB Color Convert To RGBtoHSV(double r, double g, double b)

Description

Calculates the HSV color value for a given RGB value.

License

Open Source License

Parameter

Parameter	Description
r	value is from 0 to 1
g	value is from 0 to 1
b	value is from 0 to 1

Return

the calculated hsv value to return.

Declaration

public static double[] RGBtoHSV(double r, double g, double b) 

Method Source Code

//package com.java2s;
/*/*from   ww  w.ja v  a 2s .  co m*/
 *  ColorUtils.java 
 *
 *  Created by DFKI AV on 01.01.2012.
 *  Copyright (c) 2011-2012 DFKI GmbH, Kaiserslautern. All rights reserved.
 *  Use is subject to license terms.
 */

public class Main {
    /**
     * Calculates the HSV color value for a given RGB value. The return values
     * are h = [0,360], s = [0,1], v = [0,1]. If s == 0, then h = -1 (undefined)
     *
     * @param r value is from 0 to 1
     * @param g value is from 0 to 1
     * @param b value is from 0 to 1
     * @return the calculated hsv value to return.
     */
    public static double[] RGBtoHSV(double r, double g, double b) {

        double h, s, v;

        double min, max, delta;

        min = Math.min(Math.min(r, g), b);
        max = Math.max(Math.max(r, g), b);

        // V
        v = max;

        delta = max - min;

        // S
        if (max != 0) {
            s = delta / max;
        } else {
            s = 0;
            h = -1;
            return new double[] { h, s, v };
        }

        // H
        if (r == max) {
            h = (g - b) / delta; // between yellow & magenta
        } else if (g == max) {
            h = 2 + (b - r) / delta; // between cyan & yellow
        } else {
            h = 4 + (r - g) / delta; // between magenta & cyan
        }
        h *= 60; // degrees

        if (h < 0) {
            h += 360;
        }

        return new double[] { h, s, v };
    }
}

Related

1. RGBtoHSL(int r, int g, int b)
2. RGBtoHSL(int r, int g, int b)
3. RGBtoHSL(int r, int g, int b, float[] hsl)
4. rgbToHsl(int red, int green, int blue)
5. rgbToHsv(byte[] rgb, float[] hsv)
6. RGBtoHSV(float r, float g, float b, float[] result)
7. RGBToHSV(float... rgb)
8. RGBtoHSV(float[] hsv, float[] rgb)
9. RGBtoHSV(int r, int g, int b, double hsv[])