About C # operations on pictures (watermarks, transparency)

<summary>

watermarking for processing watermark images

</summary>

<param name= "path" > Image path with watermark </param>

<returns> return image handling good watermark </returns>

Private Image Operationphoto (string path)

{

Image image = null;

Xmlcollectphotoset xmlcollectphotoset = new Xmlcollectphotoset ();

Collectphotosetinfo collectphotosetinfo = new Collectphotosetinfo ();

Collectphotosetinfo = Xmlcollectphotoset.get ();

String Pathnew=collectphotosetinfo.converphoto;

if (Collectphotosetinfo.cutwater = = "Yes")

{

Capturing watermarks

Image=cutwater (path);

}

else if (Collectphotosetinfo.cutwater = = "No")

{

Image Overlay Watermark

if (Collectphotosetinfo.converwater = = "Yes")

{

Image image1 = image.fromfile (path);

Image imagenew = Image.FromFile (Collectphotosetinfo.converphoto);

Image = Converwater (Image1, imagenew);

Image1. Dispose ();

Imagenew.dispose ();

}

else if (Collectphotosetinfo.converwater = = "No")

{

Image image1 = image.fromfile (path);

image = Image1;

}

}

Image overlay Watermark and add image watermark There is no relationship can exist at the same time can be separated

if (Collectphotosetinfo.usingd = = "Yes")

{

Working with image images

if (image = = null)

{

Image image1 = image.fromfile (path);

image = Image1;

}

Image imagewater = image;

String rmarkimgpath=collectphotosetinfo.waterphoto;//watermark Picture

String textstr = collectphotosetinfo.watertext;//Watermark Text

Font f = new Font (collectphotosetinfo.fontfamily, collectphotosetinfo.fontsize);

Brush B = new SolidBrush (Collectphotosetinfo.fontcolor);

float opacity = collectphotosetinfo.opacity;

Image = Bulidwatermarkphoto (image, Rmarkimgpath, opacity, textstr, F, b);// Iamge manipulated picture Rmarkimgpath watermark Picture 0.6f transparency textstr text f font B font Color

}

return image;

}

<summary>

Remove watermark

</summary>

<param name= "path" > Images with watermarks </param>

<returns> Remove the image after Watermark </returns>

Private Image Cutwater (string path)

{

Bitmap Sourcebitmap = new Bitmap (path);

int width = sourcebitmap.width;

int height = sourcebitmap.height;

Bitmap Resultbitmap = new Bitmap (width, height);

using (Graphics g = graphics.fromimage (Resultbitmap))

{

Rectangle resultrectangle = new Rectangle (0, 0, width, height);

Rectangle sourcerectangle = new Rectangle (0 + 1, 0 + 1,width-200, height);

G.drawimage (Sourcebitmap, Resultrectangle, Sourcerectangle, GraphicsUnit.Pixel);

}

return resultbitmap;

}

<summary>

Overlay a watermark with a picture

</summary>

<param name= "path" > Watermark image </param>

<param name= "pathnew" > Overlay pictures </param>

<returns> overlay images with watermarks </returns>

Private image Converwater (image image, Image imagenew)

{

Try

{

int width = image. Width;

int height = image. Height;

Graphics g = graphics.fromimage (image);

G.drawimage (Imagenew, New Rectangle (width-230, height-180, $), 0, 0, image. Width, image. Height, GraphicsUnit.Pixel);

G.dispose ();

}

catch (Exception ex)

{

}

return image;

}

<summary>

Making watermark images (text, pictures or text and pictures)

</summary>

<param name= "Picimage" > Original picture </param>

<param name= "Rmarkimgpath" > Desired watermark Image </param>

<param name= "Opacityvalue" > Transparency </param>

<param name= "Textstr" > Text </param>

<param name= "Font" > Fonts </param>

<param name= "Brush" > Brushes </param>

Public Image Bulidwatermarkphoto (image picimage, string rmarkimgpath, float opacityvalue, string textstr, font font, Brush Brush

{

dictionary<string, string> dicpaths = new dictionary<string, string> ();

Parse the path of a watermark image

if (Rmarkimgpath! = null && rmarkimgpath.length > 0)

{

string[] paths = Rmarkimgpath.split (';');

for (int i = 0; i < paths. Length; i++)

{

String path = Paths[i]. Split (', ') [0];

String name = Paths[i]. Split (', ') [1];

Dicpaths.add (name, path);

}

}

dictionary<string, string> dictexts = new dictionary<string, string> ();

Parse text

if (textstr! = null && textstr.length > 0)

{

String[] Texts=textstr.split (';');

for (int i = 0; i < texts. Length; i++)

{

string text = Texts[i]. Split (', ') [0];

String name = Texts[i]. Split (', ') [1];

Dictexts.add (name, text);

}

}

Image image = Picimage;

dictionary<string, string> keyValue = Datacache.keyvalue;

foreach (string key in Keyvalue.keys)

{

Graphics g = graphics.fromimage (image);

int x = Convert.ToInt32 (Keyvalue[key]. Split (', ') [0]);

int y = Convert.ToInt32 (Keyvalue[key]. Split (', ') [1]);

if (dicpaths! = null && dicpaths.count > 0)//Determine if there is a watermark picture

{

Image copyimage = Image.FromFile (Dicpaths[key]);//Watermark Picture Path

Copyimage = Changeopacity (Copyimage, opacityvalue);//processed transparent pictures

G.drawimage (Copyimage, New Rectangle (x, y, $, a), 0, 0, image. Width, image. Height, GraphicsUnit.Pixel);//painting watermark Picture

}

if (dictexts! = null && dictexts.count > 0)//Determine if there is a watermark word

{

Image txtimage = Textimage (Dictexts[key], font, brush);//Text

Txtimage = Changeopacity (Txtimage, Opacityvalue);

G.drawimage (Txtimage, New Rectangle (x, y, +, +), +, +, image. Width, image. Height, GraphicsUnit.Pixel);//Draw on the watermark text

}

G.dispose ();

}

return image;

}

<summary>

Change the transparency of a picture

</summary>

<param name= "img" > Pictures </param>

<param name= "Opacityvalue" > Transparency </param>

<returns></returns>

public static Bitmap changeopacity (Image img, float opacityvalue)

{

Float[][] NArray ={new float[] {1, 0, 0, 0, 0},

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

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

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

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

ColorMatrix matrix = new ColorMatrix (NArray);

ImageAttributes attributes = new ImageAttributes ();

Attributes. SetColorMatrix (Matrix, Colormatrixflag.default, Coloradjusttype.bitmap);

Image srcimage = img;

Bitmap resultimage = new Bitmap (srcimage.width, srcimage.height);

Graphics g = graphics.fromimage (resultimage);

G.drawimage (Srcimage, New Rectangle (0, 0, Srcimage.width, srcimage.height), 0, 0, srcimage.width, Srcimage.height, GraphicsUnit.Pixel, attributes);

return resultimage;

}

<summary>

Make a transparent diagram with text

</summary>

<param name= "Textstr" > Text </param>

<param name= "Font" > Text style </param>

<param name= "Brush" > Brushes </param>

<returns> transparent diagram with text </returns>

Private Image Textimage (string textstr, font font, brush brush)

{

string path = [email protected] "\collectionphoto.jpg";

Image image = Image.FromFile (path);

Image = Changeopacity (image, 0.0f);

Graphics g = graphics.fromimage (image);

g.DrawString (textstr, font, brush, 60, 60);

G.dispose ();

Image imagenew = image;

return imagenew;

}

This article comes from the "learning program that reminds me of math:" blog, be sure to keep this provenance http://iammoon24.blog.51cto.com/2552968/1790017

About C # operations on pictures (watermarks, transparency)