g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height), 0, 0, original.Width, original.Height, GraphicsUnit.Pixel, attributes);

{

//using the grayscale color matrix

new float[] {.11f, .11f, .11f, 0, 0},

//draw the original image on the new image

//create some image attributes

System.Drawing.Imaging.ColorMatrix colorMatrix = new System.Drawing.Imaging.ColorMatrix(

Graphics g = Graphics.FromImage(newBitmap);

});

Bitmap newBitmap = new Bitmap(original.Width, original.Height);

public static Bitmap MakeGrayscale(Bitmap original)

复制代码 代码如下:

//create a blank bitmap the same size as original

new float[] {0, 0, 0, 1, 0},

new float[] {.3f, .3f, .3f, 0, 0},

//set the color matrix attribute

主要功能代码如下：

//get a graphics object from the new image

new float[][]

attributes.SetColorMatrix(colorMatrix);

//create the grayscale ColorMatrix

new float[] {.59f, .59f, .59f, 0, 0},

//dispose the Graphics object

System.Drawing.Imaging.ImageAttributes attributes = new System.Drawing.Imaging.ImageAttributes();

{

new float[] {0, 0, 0, 0, 1}