本文实例讲述了C#图像对比度调整的方法。分享给大家供大家参考。具体如下：

//定义对比度调整函数 private static Bitmap ContrastP(Bitmap a, double v) { System.Drawing.Imaging.BitmapData bmpData = a.LockBits(new Rectangle(0, 0, a.Width, a.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb); int bytes = a.Width * a.Height * 3; IntPtr ptr = bmpData.Scan0; int stride = bmpData.Stride; unsafe { byte* p = (byte*)ptr; int temp; for (int j = 0; j < a.Height; j++) { for (int i = 0; i < a.Width * 3; i++) { temp = (int)((p[0] - 127) * v + 127); temp = (temp > 255) ? 255 : temp < 0 ? 0 : temp; p[0] = (byte)temp; p++; } p += stride - a.Width * 3; } } a.UnlockBits(bmpData); return a; }

希望本文所述对大家的C#程序设计有所帮助。