Example of grayscale algorithm for C # color image

In this paper, the implementation method of C # Color image grayscale is described. Share to everyone for your reference. Here's how:

The main function code is as follows:

The code is as follows:

public static Bitmap Makegrayscale (Bitmap original)

{

Create a blank bitmap the same size as original

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

Get a Graphics object from the new image

Graphics g = graphics.fromimage (Newbitmap);

Create the Grayscale ColorMatrix

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

New float[][]

{

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

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

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

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

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

});

Create some image attributes

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

Set the color matrix attribute

Attributes. SetColorMatrix (ColorMatrix);

Draw the original image on the new image

Using the grayscale color matrix

G.drawimage (Original, new Rectangle (0, 0, original. Width, original. Height), 0, 0, original. Width, original. Height, GraphicsUnit.Pixel, attributes);

Dispose the Graphics object

G.dispose ();

return newbitmap;

}

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Example of grayscale algorithm for C # color image

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Example of grayscale algorithm for C # color image