日期:2014-05-20 浏览次数:20932 次
/// <summary> /// 设置色相 /// </summary> /// <param name="colorFilterType">色相类型</param> public void SetColorFilter(ColorFilterTypes colorFilterType) { Bitmap temp = (Bitmap)_currentBitmap; Bitmap bmap = (Bitmap)temp.Clone(); Color c; for (int i = 0; i < bmap.Width; i++) { for (int j = 0; j < bmap.Height; j++) { c = bmap.GetPixel(i, j); int nPixelR = 0; int nPixelG = 0; int nPixelB = 0; if (colorFilterType == ColorFilterTypes.Red) { nPixelR = c.R; nPixelG = c.G - 255; nPixelB = c.B - 255; } else if (colorFilterType == ColorFilterTypes.Green) { nPixelR = c.R - 255; nPixelG = c.G; nPixelB = c.B - 255; } else if (colorFilterType == ColorFilterTypes.Blue) { nPixelR = c.R - 255; nPixelG = c.G - 255; nPixelB = c.B; } nPixelR = Math.Max(nPixelR, 0); nPixelR = Math.Min(255, nPixelR); nPixelG = Math.Max(nPixelG, 0); nPixelG = Math.Min(255, nPixelG); nPixelB = Math.Max(nPixelB, 0); nPixelB = Math.Min(255, nPixelB); bmap.SetPixel(i, j, Color.FromArgb((byte)nPixelR, (byte)nPixelG, (byte)nPixelB)); } } _currentBitmap = (Bitmap)bmap.Clone(); }
/// <summary> /// 曲线 /// </summary> /// <param name="red">红</param> /// <param name="green">绿</param> /// <param name="blue">蓝</param> public void SetGamma(double red, double green, double blue) { Bitmap temp = (Bitmap)_currentBitmap; Bitmap bmap = (Bitmap)temp.Clone(); Color c; byte[] redGamma = CreateGammaArray(red); byte[] greenGamma = CreateGammaArray(green); byte[] blueGamma = CreateGammaArray(blue); for (int i = 0; i < bmap.Width; i++) { for (int j = 0; j < bmap.Height; j++) { c = bmap.GetPixel(i, j); bmap.SetPixel(i, j, Color.FromArgb(redGamma[c.R], greenGamma[c.G], blueGamma[c.B])); } } _currentBitmap = (Bitmap)bmap.Clone(); } /// <summary> /// 获取曲线数组 /// </summary> /// <param name="color">色彩</param> /// <returns>数组</returns> private byte[] CreateGammaArray(double color) { byte[] gammaArray = new byte[256]; for (int i = 0; i < 256; ++i) { gammaArray[i] = (byte)Math.Min(255, (int)((255.0 * Math.Pow(i / 255.0, 1.0 / color)) + 0.5)); } return gammaArray; }