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我在這個論壇發現了這個代碼,但我對代碼有懷疑。HSV/RGB色彩空間轉換
in this code snippet「int hi = Convert.ToInt32(Math.Floor(hue/60))%6;」爲什麼完整的答案是6模數? (%6)
爲什麼「value = value * 255」的值乘以255?
即時通訊研究論文(p-15,p-16)和相同的算法進行了討論,但我發現這些差異。
http://www.poynton.com/PDFs/coloureq.pdf
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); } public void convertToHSV(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; }
是因爲色調的變化它在圓柱座標顏色?夥計們幫助我 –