JAVA简单二值化图像处理

来源：互联网发布：人工智能都有哪些编辑：程序博客网时间：2024/06/05 16:40
package downloadimg;import java.awt.Color;import java.awt.image.BufferedImage;import java.io.BufferedInputStream;import java.io.BufferedReader;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.IOException;import java.io.InputStreamReader;import java.net.URL;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import java.util.logging.Level;import java.util.logging.Logger;import javax.imageio.ImageIO;import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.X509TrustManager;/** * @author Cytosine * @thanks Wizard,BreakShadow */public class SimpleBinarization {    public static void main(String args[]){        for(int i=0;i<100;i++){            BufferedImage bi=httpsGetImg(httpsGetImgURL());            int width=bi.getWidth();            int height=bi.getHeight();            int pixel;            BufferedImage binary=new BufferedImage(width,height,BufferedImage.TYPE_BYTE_BINARY);            for(int minx=bi.getMinX();minx<width;minx++){                for(int miny=bi.getMinY();miny<height;miny++){                    pixel=bi.getRGB(minx, miny);                    if(pixel==-1){//此时为白色/透明背景                        binary.setRGB(minx, miny, Color.WHITE.getRGB());                    }else{                        binary.setRGB(minx, miny, Color.BLACK.getRGB());                    }                }            }            String p="D:\\TEST\\"+i+".png";            File f=new File(p);            try {                ImageIO.write(bi, "png", f);            } catch (IOException ex) {                Logger.getLogger(SimpleBinarization.class.getName()).log(Level.SEVERE, null, ex);            }            String path="D:\\TEST\\"+i+"b.png";            File file=new File(path);            try {                ImageIO.write(binary, "png", file);            } catch (IOException ex) {                Logger.getLogger(SimpleBinarization.class.getName()).log(Level.SEVERE, null, ex);            }        }    }    public static String httpsGetImgURL(){        StringBuffer requestResult=new StringBuffer();        BufferedReader bufferedReader=null;        try{            SSLContext ssl=SSLContext.getInstance("TLS");            ssl.init(null, new TrustManager[]{cytoX509TrustManager}, null);            URL url=new URL("https://passport.baidu.com/v2/?reggetcodestr");            HttpsURLConnection conn=(HttpsURLConnection)url.openConnection();            conn.setSSLSocketFactory(ssl.getSocketFactory());            conn.setRequestMethod("GET");            conn.setDoOutput(true);            conn.connect();            bufferedReader=new BufferedReader(new InputStreamReader(conn.getInputStream()));        }catch(Exception ex){            ex.printStackTrace();        }        try{            String line;            while((line=bufferedReader.readLine())!=null){                requestResult.append(line);            }            bufferedReader.close();        }catch(Exception ex){            ex.printStackTrace();        }        String all=requestResult.toString();        String[] spl=all.split("'");        String verifystr=spl[3];        String result="https://passport.baidu.com/cgi-bin/genimage?"+verifystr;        return result;    }    public static BufferedImage httpsGetImg(String url){        BufferedInputStream bufferedInputStream=null;        ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();        try{            SSLContext ssl=SSLContext.getInstance("TLS");            ssl.init(null, new TrustManager[]{cytoX509TrustManager}, null);            URL realURL=new URL(url);            HttpsURLConnection conn=(HttpsURLConnection)realURL.openConnection();            conn.setSSLSocketFactory(ssl.getSocketFactory());            conn.setRequestMethod("GET");            conn.connect();            bufferedInputStream=new BufferedInputStream(conn.getInputStream());        }catch(Exception ex){            ex.printStackTrace();        }        try{            int b;            while((b=bufferedInputStream.read())!=-1){                byteArrayOutputStream.write(b);            }            bufferedInputStream.close();        }catch(Exception ex){            ex.printStackTrace();        }        byte[] imgData=byteArrayOutputStream.toByteArray();        ByteArrayInputStream in=new ByteArrayInputStream(imgData);        BufferedImage result=null;        try {            result = ImageIO.read(in);        } catch (IOException ex) {            Logger.getLogger(DownloadImgWithoutType.class.getName()).log(Level.SEVERE, null, ex);        }        return result;    }    //https证书    private static X509TrustManager cytoX509TrustManager=new X509TrustManager(){        public X509Certificate[] getAcceptedIssuers(){                return null;        }        @Override        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {        }        @Override        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {        }    };}
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