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  2. java

本文介绍如何将 HSB 颜色模式转换为 RGB 颜色模式。

关于这两种模式的介绍，可以参考 Colorfizer 。该网站也提供了在线的转换工具，可以用来验证结果。

HSB转换为RGB

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public static double[] newRgb2hsb(int red, int green, int blue) {

    double b, delta, g, max, min, r;

    double hue, saturation, luminosity;

    r = (double) red / MaxRGB;
    g = (double) green / MaxRGB;
    b = (double) blue / MaxRGB;
    max = Math.max(r, Math.max(g, b));
    min = Math.min(r, Math.min(g, b));

    hue = 0.0;
    saturation = 0.0;
    luminosity = max;

    delta = max - min;
    if (delta == 0.0) {
        return new double[]{hue, saturation, luminosity};
    }

    if (max != 0) {
        saturation = delta / max;
    }
    if (r == max)
        hue = 60 * (((g - b) / delta) % 6);
    else if (g == max)
        hue = 60 * ((b - r) / delta + 2);
    else
        hue = 60 * ((r - g) + 4);

    return new double[]{hue, saturation, luminosity};
}
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