c#中图像处理的三种方法的比较

c#中图像处理的三种方法的比较

;
case "gif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Gif);
break;
case "tif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Tiff);
break;
case "png":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
break;
default:
break;
}
}
}

private void button3_Click(object sender, EventArgs e)
{
this.Close();
}

private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
if (curBitmap != null)
{
g.DrawImage(curBitmap, 160, 20, curBitmap.Width/2, curBitmap.Height/2);
}
}

private void button6_Click(object sender, EventArgs e)
{
if (curBitmap != null)
{
double time1; double time2;
time1 = Microsoft.VisualBasic.DateAndTime.Timer;
Color curColor;
int ret;
//二维图像数组循环
for (int i = 0; i < curBitmap.Width; i++)
{
for (int j = 0; j < curBitmap.Height; j++)
{
curColor = curBitmap.GetPixel(i, j);
ret = (int)(curColor.R * 0.299 + curColor.G *0.587 + curColor.B * 0.114);
curBitmap.SetPixel(i, j, Color.FromArgb(ret, ret, ret));
}
}
Invalidate();
time2 = Microsoft.VisualBasic.DateAndTime.Timer;
this.toolStripStatusLabel1.Text = "耗时:" + Convert .ToString (time2 -time1 ) + "s!";
}
}

private void button5_Click(object sender, EventArgs e)
{
if (curBitmap != null)
{
double time1; double time2;
time1 = Microsoft.VisualBasic.DateAndTime.Timer;

Rectangle rect = new Rectangle(0, 0, curBitmap.Width, curBitmap.Height);
//以可读的方式锁定全部位图像素
System.Drawing.Imaging.BitmapData bmpData = curBitmap.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, curBitmap.PixelFormat);
IntPtr ptr = bmpData.Scan0;
int bytes = bmpData.Stride * bmpData.Height;
byte[] rgbValues = new byte[bytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes);

//灰度化
double colorTemp = 0;
//for (int i = 0; i < rgbValues.Length; i += 3)
//{
// colorTemp = rgbValues[i +