本文实例讲述了C#图像线性变换的方法。分享给大家供大家参考。具体如下：
//定义图像线性运算函数（y=kx+v）
private static Bitmap LinearOP(Bitmap a, double k, double v)
{
Rectangle rect = new Rectangle(0, 0, a.Width, a.Height);
System.Drawing.Imaging.BitmapData srcData = a.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, a.PixelFormat);
IntPtr ptr = srcData.Scan0;
int bytes = 0;
bytes = srcData.Stride * a.Height;
byte[] grayValues = new byte[bytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, grayValues, 0, bytes);
int temp = 0;
for (int i = 0; i < bytes; i++)
{
temp = (int)(k * grayValues[i] + v + 0.5);
temp = (temp > 255) ? 255 : temp < 0 ? 0 : temp;
grayValues[i] = (byte)temp;
}
System.Runtime.InteropServices.Marshal.Copy(grayValues, 0, ptr, bytes);
a.UnlockBits(srcData);
return a;
}
希望本文所述对大家的C#程序设计有所帮助。