界面相关核心代码如下：
public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { var rnd = new Random(); var rgb = new ColorRGB(rnd.Next(0, 255), rnd.Next(0, 255), rnd.Next(0, 255)); var hsv = ColorHelper.RgbToHsv(rgb); picDestinationColor.BackColor = Color.FromArgb(255, rgb.R, rgb.G, rgb.B); nudH.Value = hsv.H; nudS.Value = hsv.S; nudV.Value = hsv.V; refreshColorPanel(hsv); picPosH.Left = (int)(picH.Left + (picH.Width * nudH.Value / 360)); picPosS.Left = (int)(picS.Left + (picS.Width * nudS.Value / 255)); picPosV.Left = (int)(picV.Left + (picV.Width * nudV.Value / 255)); } void refreshColorPanel(ColorHSV hsv) { var bm = new Bitmap(picH.Width, picH.Height); using (Graphics g = Graphics.FromImage(bm)) { for (var i = 0; i < picH.Width; i++) { var hsvColor = new ColorHSV(360 * i / picH.Width, 255, 255); var rgbColor = ColorHelper.HsvToRgb(hsvColor); var color = Color.FromArgb(255,rgbColor.R ,rgbColor.G ,rgbColor.B); g.DrawLine(new Pen(color, 1), i, 0, i, picH.Height); } g.Save(); } picH.Image = bm; bm = new Bitmap(picS.Width, picS.Height); using (Graphics g = Graphics.FromImage(bm)) { for (var i = 0; i < picS.Width; i++) { var hsvColor = new ColorHSV(hsv.H, 255 * i / picS.Width, hsv.V); var rgbColor = ColorHelper.HsvToRgb(hsvColor); var color = Color.FromArgb(255, rgbColor.R, rgbColor.G, rgbColor.B); g.DrawLine(new Pen(color, 1), i, 0, i, picS.Height); } g.Save(); } picS.Image = bm; bm = new Bitmap(picV.Width, picV.Height); using (Graphics g = Graphics.FromImage(bm)) { for (var i = 0; i < picV.Width; i++) { var hsvColor = new ColorHSV(hsv.H, hsv.S, 255 * i / picS.Width); var rgbColor = ColorHelper.HsvToRgb(hsvColor); var color = Color.FromArgb(255, rgbColor.R, rgbColor.G, rgbColor.B); g.DrawLine(new Pen(color, 1), i, 0, i, picV.Height); } g.Save(); } picV.Image = bm; var destRgbColor = ColorHelper.HsvToRgb(hsv); picDestinationColor.BackColor = Color.FromArgb(255, destRgbColor.R, destRgbColor.G, destRgbColor.B); ; } void colorChanged() { var hsv = new ColorHSV((int)nudH.Value, (int)nudS.Value, (int)nudV.Value); refreshColorPanel(hsv); } private void nudH_ValueChanged(object sender, EventArgs e) { colorChanged(); } private void nudS_ValueChanged(object sender, EventArgs e) { colorChanged(); } private void nudV_ValueChanged(object sender, EventArgs e) { colorChanged(); } private void picH_MouseDown(object sender, MouseEventArgs e) { nudH.Value = (int)(360 * e.X / picH.Width); nudS.Value = nudS.Maximum; nudV.Value = nudV.Maximum; picPosH.Left = picH.Left + e.X; } private void picS_MouseDown(object sender, MouseEventArgs e) { nudS.Value = (int)(255 * e.X / picS.Width); picPosS.Left = picS.Left + e.X; } private void picV_MouseDown(object sender, MouseEventArgs e) { nudV.Value = (int)(255 * e.X / picV.Width); picPosV.Left = picV.Left + e.X; } }
下面是实体类和一个工具类：
#region RGB / HSV / HSL 颜色模型类 /// <summary> /// 类 名：ColorHSL /// 功 能：H 色相 \ S 饱和度(纯度) \ L 亮度 颜色模型 /// 日 期：2015-02-08 /// 修 改：2015-03-20 /// 作 者：ls9512 /// </summary> public class ColorHSL { public ColorHSL(int h, int s, int l) { this._h = h; this._s = s; this._l = l; } private int _h; private int _s; private int _l; /// <summary> /// 色相 /// </summary> public int H { get { return this._h; } set { this._h = value; this._h = this._h > 360 ? 360 : this._h; this._h = this._h < 0 ? 0 : this._h; } } /// <summary> /// 饱和度(纯度) /// </summary> public int S { get { return this._s; } set { this._s = value; this._s = this._s > 255 ? 255 : this._s; this._s = this._s < 0 ? 0 : this._s; } } /// <summary> /// 饱和度 /// </summary> public int L { get { return this._l; } set { this._l = value; this._l = this._l > 255 ? 255 : this._l; this._l = this._l < 0 ? 0 : this._l; } } } /// <summary> /// 类 名：ColorHSV /// 功 能：H 色相 \ S 饱和度(纯度) \ V 明度 颜色模型 /// 日 期：2015-01-22 /// 修 改：2015-03-20 /// 作 者：ls9512 /// </summary> public class ColorHSV { /// <summary> /// 构造方法 /// </summary> /// <param name="h"></param> /// <param name="s"></param> /// <param name="v"></param> public ColorHSV(int h, int s, int v) { this._h = h; this._s = s; this._v = v; } private int _h; private int _s; private int _v; /// <summary> /// 色相 /// </summary> public int H { get { return this._h; } set { this._h = value; this._h = this._h > 360 ? 360 : this._h; this._h = this._h < 0 ? 0 : this._h; } } /// <summary> /// 饱和度(纯度) /// </summary> public int S { get { return this._s; } set { this._s = value; this._s = this._s > 255 ? 255 : this._s; this._s = this._s < 0 ? 0 : this._s; } } /// <summary> /// 明度 /// </summary> public int V { get { return this._v; } set { this._v = value; this._v = this._v > 255 ? 255 : this._v; this._v = this._v < 0 ? 0 : this._v; } } } /// <summary> /// 类 名：ColorRGB /// 功 能：R 红色 \ G 绿色 \ B 蓝色 颜色模型 /// 所有颜色模型的基类，RGB是用于输出到屏幕的颜色模式，所以所有模型都将转换成RGB输出 /// 日 期：2015-01-22 /// 修 改：2015-03-20 /// 作 者：ls9512 /// </summary> public class ColorRGB { /// <summary> /// 构造方法 /// </summary> /// <param name="r"></param> /// <param name="g"></param> /// <param name="b"></param> public ColorRGB(int r, int g, int b) { this._r = r; this._g = g; this._b = b; } private int _r; private int _g; private int _b; /// <summary> /// 红色 /// </summary> public int R { get { return this._r; } set { this._r = value; this._r = this._r > 255 ? 255 : this._r; this._r = this._r < 0 ? 0 : this._r; } } /// <summary> /// 绿色 /// </summary> public int G { get { return this._g; } set { this._g = value; this._g = this._g > 255 ? 255 : this._g; this._g = this._g < 0 ? 0 : this._g; } } /// <summary> /// 蓝色 /// </summary> public int B { get { return this._b; } set { this._b = value; this._b = this._b > 255 ? 255 : this._b; this._b = this._b < 0 ? 0 : this._b; } } /// <summary> /// 获取实际颜色 /// </summary> /// <returns></returns> public Color GetColor() { return Color.FromArgb(this._r, this._g, this._b); } } #endregion
/// <summary> /// 类 名：ColorHelper /// 功 能：提供从RGB到HSV/HSL色彩空间的相互转换 /// 日 期：2015-02-08 /// 修 改：2015-03-20 /// 作 者：ls9512 /// </summary> public static class ColorHelper { /// <summary> /// RGB转换HSV /// </summary> /// <param name="rgb"></param> /// <returns></returns> public static ColorHSV RgbToHsv(ColorRGB rgb) { float min, max, tmp, H, S, V; float R = rgb.R * 1.0f / 255, G = rgb.G * 1.0f / 255, B = rgb.B * 1.0f / 255; tmp = Math.Min(R, G); min = Math.Min(tmp, B); tmp = Math.Max(R, G); max = Math.Max(tmp, B); // H H = 0; if (max == min) { H = 0; } else if (max == R && G > B) { H = 60 * (G - B) * 1.0f / (max - min) + 0; } else if (max == R && G < B) { H = 60 * (G - B) * 1.0f / (max - min) + 360; } else if (max == G) { H = H = 60 * (B - R) * 1.0f / (max - min) + 120; } else if (max == B) { H = H = 60 * (R - G) * 1.0f / (max - min) + 240; } // S if (max == 0) { S = 0; } else { S = (max - min) * 1.0f / max; } // V V = max; return new ColorHSV((int)H, (int)(S * 255), (int)(V * 255)); } /// <summary> /// HSV转换RGB /// </summary> /// <param name="hsv"></param> /// <returns></returns> public static ColorRGB HsvToRgb(ColorHSV hsv) { if (hsv.H == 360) hsv.H = 359; // 360为全黑，原因不明 float R = 0f, G = 0f, B = 0f; if (hsv.S == 0) { return new ColorRGB(hsv.V, hsv.V, hsv.V); } float S = hsv.S * 1.0f / 255, V = hsv.V * 1.0f / 255; int H1 = (int)(hsv.H * 1.0f / 60), H = hsv.H; float F = H * 1.0f / 60 - H1; float P = V * (1.0f - S); float Q = V * (1.0f - F * S); float T = V * (1.0f - (1.0f - F) * S); switch (H1) { case 0: R = V; G = T; B = P; break; case 1: R = Q; G = V; B = P; break; case 2: R = P; G = V; B = T; break; case 3: R = P; G = Q; B = V; break; case 4: R = T; G = P; B = V; break; case 5: R = V; G = P; B = Q; break; } R = R * 255; G = G * 255; B = B * 255; while (R > 255) R -= 255; while (R < 0) R += 255; while (G > 255) G -= 255; while (G < 0) G += 255; while (B > 255) B -= 255; while (B < 0) B += 255; return new ColorRGB((int)R, (int)G, (int)B); } /// <summary> /// RGB转换HSL /// </summary> /// <param name="rgb"></param> /// <returns></returns> public static ColorHSL RgbToHsl(ColorRGB rgb) { float min, max, tmp, H, S, L; float R = rgb.R * 1.0f / 255, G = rgb.G * 1.0f / 255, B = rgb.B * 1.0f / 255; tmp = Math.Min(R, G); min = Math.Min(tmp, B); tmp = Math.Max(R, G); max = Math.Max(tmp, B); // H H = 0; if (max == min) { H = 0; // 此时H应为未定义，通常写为0 } else if (max == R && G > B) { H = 60 * (G - B) * 1.0f / (max - min) + 0; } else if (max == R && G < B) { H = 60 * (G - B) * 1.0f / (max - min) + 360; } else if (max == G) { H = H = 60 * (B - R) * 1.0f / (max - min) + 120; } else if (max == B) { H = H = 60 * (R - G) * 1.0f / (max - min) + 240; } // L L = 0.5f * (max + min); // S S = 0; if (L == 0 || max == min) { S = 0; } else if (0 < L && L < 0.5) { S = (max - min) / (L * 2); } else if (L > 0.5) { S = (max - min) / (2 - 2 * L); } return new ColorHSL((int)H, (int)(S * 255), (int)(L * 255)); } /// <summary> /// HSL转换RGB /// </summary> /// <param name="hsl"></param> /// <returns></returns> public static ColorRGB HslToRgb(ColorHSL hsl) { float R = 0f, G = 0f, B = 0f; float S = hsl.S * 1.0f / 255, L = hsl.L * 1.0f / 255; float temp1, temp2, temp3; if (S == 0f) // 灰色 { R = L; G = L; B = L; } else { if (L < 0.5f) { temp2 = L * (1.0f + S); } else { temp2 = L + S - L * S; } temp1 = 2.0f * L - temp2; float H = hsl.H * 1.0f / 360; // R temp3 = H + 1.0f / 3.0f; if (temp3 < 0) temp3 += 1.0f; if (temp3 > 1) temp3 -= 1.0f; R = temp3; // G temp3 = H; if (temp3 < 0) temp3 += 1.0f; if (temp3 > 1) temp3 -= 1.0f; G = temp3; // B temp3 = H - 1.0f / 3.0f; if (temp3 < 0) temp3 += 1.0f; if (temp3 > 1) temp3 -= 1.0f; B = temp3; } R = R * 255; G = G * 255; B = B * 255; return new ColorRGB((int)R, (int)G, (int)B); } }
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