Authentication code Identification of academic Department of Jimei University (I.)

"Original, reproduced please mark Sen Dog"

Jimei University Verification Code of 2 kinds, one is the student login with the verification code, one is the administrator backstage verification code. Such as:

(Student sign-in verification code)

Http://www.cnblogs.com/sendog/p/5568618.html

(Administrator login Verification code)

For the first type of verification code, because I mentioned in the reply how to parse the code and then poor to the academic office to crack, today has been replaced by a new style verification code, the second kind has not changed, it is estimated that soon will be changed. (Blame me)

This article will identify 2 types of verification codes in 2 different ways.

First of all

1. Remove light-colored noise

     Public Static voidSysout (bufferedimage img)throwsioexception{intHeight =img.getheight (); intwidth =img.getwidth ();  for(intx = 0; x < width; ++x) { for(inty = 0; Y < height; ++y) {intcolor =GetC (Img.getrgb (x, y)); if(color>300) {Img.setrgb (x, Y, Color.WHITE.getRGB ()); }                //System.out.println (x+ ":" +y+ ":" +color);}} imageio.write (IMG,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/ss1.gif")); }

This is mainly the control of this color>300 300 valve value. By printing a one-point contrast color, you can find that the color value of the tint is greater than 300

     Public Static int GetC (int  colorint) {        new  Color (colorint);         return (color.getred () + color.getgreen () + color.getblue ());    }

After this step the verification code after processing such as:

Only the dark color of the noise is left.

2. Deep-color noise we can remove it by using its top and bottom left and right noise points to be white. Directly on the code:

     Public Static voidSurround (bufferedimage img)throwsioexception{intHeight =img.getheight (); intwidth =img.getwidth ();  for(intx = 1; x < width-1; ++x) { for(inty = 1; Y < height-1; ++y) {ints = Img.getrgb (x, y-1); intR = Img.getrgb (x, y+1); intz = Img.getrgb (x-1, y+1); intL = Img.getrgb (x+1, y+1); intWhite =Color.WHITE.getRGB (); if(S==white && r==white && z==white && l==White )                {Img.setrgb (x, Y, Color.WHITE.getRGB ()); }}} Imageio.write (IMG,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/ss2.gif")); }

The verification code after this step is as follows:

3. Then we will simply deal with it, is to cut off the external image of the inner margin, only the main verification code.

     Public Static void throws ioexception{        = img.getsubimage (7, 4, +);         New File ("c:/users/mr.wu/desktop/Verification Code 2/ss3.gif");    }

Processing results:

4. Two value processing

     Public Static voidBlack (bufferedimage img)throwsioexception{intHeight =img.getheight (); intwidth =img.getwidth (); intWhite =Color.WHITE.getRGB ();  for(intx = 0; x < width; ++x) { for(inty = 0; Y < height; ++y) {if(Img.getrgb (x, y)! =White )                {Img.setrgb (x, Y, Color.black.getRGB ()); }}} Imageio.write (IMG,"GIF",NewFile ("c:/users/mr.wu/desktop//Verification Code 2/ss4.gif")); }

Here, the binary value as long as the other than the white color all set to black on the line, the result is as follows

=================================

After processing to this step need to cut the verification code, collect 0~9 characters, and then you can let the verification code one by one character and the collected 0~9 characters, the highest similarity is the corresponding value

5. Collect Verification Code characters

    //Split Picture     Public Static voidsplitimage (String picfile)throwsException {bufferedimage img= Imageio.read (NewFile (picfile)); BufferedImage IMG1= img.getsubimage (0, 0, 7, 12); BufferedImage Img2= Img.getsubimage (8, 0, 7, 12); BufferedImage IMG3= Img.getsubimage (18, 0, 7, 12); BufferedImage IMG4= Img.getsubimage (26, 0, 7, 12); Imageio.write (IMG1,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/img/1.gif")); Imageio.write (Img2,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/img/2.gif")); Imageio.write (IMG3,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/img/3.gif")); Imageio.write (IMG4,"GIF",NewFile ("c:/users/mr.wu/desktop/Verification Code 2/img/4.gif")); }  

6. Take the verification code of the 4th step to compare with the verification code collected in step 5th

     Public Static voidMain (string[] args)throwsException {String picfile= "c:/users/mr.wu/desktop/Verification Code 2/ss4.gif"; Map<bufferedimage, string> map =Loadtraindata (); List<BufferedImage> listimg =splitimage (Picfile); String result= "";  for(BufferedImage bi:listimg) {result+=GETSINGLECHAROCR (bi, map);    } System.out.println (Result); }             Public StaticList<bufferedimage>splitimage (String picfile)throwsException {bufferedimage img= Imageio.read (NewFile (picfile)); List<BufferedImage> Subimgs =NewArraylist<bufferedimage>(); Subimgs.add (Img.getsubimage (0, 0, 7, 12)); Subimgs.add (Img.getsubimage (8, 0, 7, 12)); Subimgs.add (Img.getsubimage (18, 0, 7, 12)); Subimgs.add (Img.getsubimage (26, 0, 7, 12)); returnSubimgs; }               Public StaticMap<bufferedimage, string> Loadtraindata ()throwsException {Map<bufferedimage, string> map =NewHashmap<bufferedimage, string>(); File dir=NewFile ("c:/users/mr.wu/desktop/Verification Code 2/IMG/1"); file[] Files=Dir.listfiles ();  for(file file:files) {map.put (Imageio.read (file), File.getname (). CharAt (0) + ""); }        returnmap; }             Public StaticString GETSINGLECHAROCR (bufferedimage img, Map<bufferedimage, string>map) {String result= ""; intwidth =img.getwidth (); intHeight =img.getheight (); intMin = width *height;  for(BufferedImage bi:map.keySet ()) {intCount = 0; Label1: for(intx = 0; x < width; ++x) { for(inty = 0; Y < height; ++y) {if(Iswhite (Img.getrgb (x, y))! =Iswhite (Bi.getrgb (x, y))) {Count++;//of different                        if(Count >=min) BreakLabel1; }                }            }            if(Count <min) {min=count; Result=map.get (BI);        }} System.out.println (Result); returnresult; }         Public Static intIswhite (intcolorint) {Color Color=NewColor (Colorint); if(color.getred () + color.getgreen () + color.getblue () > 100) {//Black for 0 white 765            return1; }        return0; }

Output Result:

Authentication code Identification of academic Department of Jimei University (I.)