[C#] RGB to HSV, HSV to RGB

HSV : hue saturation value의 약어. 색상(H), 채도(S), 명도(V) 를 의미한다.

 

아래 메서드를 통해 RGB,HSV 간에 변환을 할수 있다.

 

/// <summary>         /// Color 를 HSV 값으로 반환합니다.         /// </summary>         /// <param name="color">Color</param>         /// <param name="hue">hue</param>         /// <param name="saturation">saturation</param>         /// <param name="value">value</param>         public static void ColorToHSV(Color color, out double hue, out double saturation, out double value)         {             int max = Math.Max(color.R, Math.Max(color.G, color.B));             int min = Math.Min(color.R, Math.Min(color.G, color.B));               hue = color.GetHue();             saturation = (max == 0) ? 0 : 1d - (1d * min / max);             value = max / 255d;         }           /// <summary>         /// HSV 값을 RGB 로 반환합니다.         /// </summary>         /// <param name="hue">hue</param>         /// <param name="saturation">saturation</param>         /// <param name="value">value</param>         /// <returns>Color</returns>         public static Color ColorFromHSV(double hue, double saturation, double value)         {             int hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6;             double f = hue / 60 - Math.Floor(hue / 60);               value = value * 255;             int v = Convert.ToInt32(value);             int p = Convert.ToInt32(value * (1 - saturation));             int q = Convert.ToInt32(value * (1 - f * saturation));             int t = Convert.ToInt32(value * (1 - (1 - f) * saturation));               if (hi == 0)      return Color.FromArgb(255, v, t, p);             else if (hi == 1) return Color.FromArgb(255, q, v, p);             else if (hi == 2) return Color.FromArgb(255, p, v, t);             else if (hi == 3) return Color.FromArgb(255, p, q, v);             else if (hi == 4) return Color.FromArgb(255, t, p, v);             else              return Color.FromArgb(255, v, p, q);         }

 

 

(테스트)

 

Color blueColor = Color.LightBlue;               ColorToHSV(blueColor, out double hue, out double saturation, out double value);               Color convertColor =  ColorFromHSV(hue, saturation, value);               if (blueColor.ToArgb() == convertColor.ToArgb())             {               }

 

 

값을 보면 같은 값으로 다시 변환되서 나온걸 확인 할수 있다.