使用java語(yǔ)言，通過tesseract-ocr對(duì)圖片進(jìn)行識(shí)別。
1.tesseract-ocr
下載windows版本并安裝。
2.程序如下：
a.imageiohelper類
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package ocr; import java.awt.image.bufferedimage;import java.io.file;import java.io.ioexception;import java.util.iterator;import java.util.locale; import javax.imageio.iioimage;import javax.imageio.imageio;import javax.imageio.imagereader;import javax.imageio.imagewriteparam;import javax.imageio.imagewriter;import javax.imageio.metadata.iiometadata;import javax.imageio.stream.imageinputstream;import javax.imageio.stream.imageoutputstream; import com.sun.media.imageio.plugins.tiff.tiffimagewriteparam; public class imageiohelper { /** * 圖片文件轉(zhuǎn)換為tif格式 * @param imagefile 文件路徑 * @param imageformat 文件擴(kuò)展名 * @return */ public static file createimage(file imagefile, string imageformat) { file tempfile = null; try { iterator<imagereader> readers = imageio.getimagereadersbyformatname(imageformat); imagereader reader = readers.next(); imageinputstream iis = imageio.createimageinputstream(imagefile); reader.setinput(iis); //read the stream metadata iiometadata streammetadata = reader.getstreammetadata(); //set up the writeparam tiffimagewriteparam tiffwriteparam = new tiffimagewriteparam(locale.chinese); tiffwriteparam.setcompressionmode(imagewriteparam.mode_disabled); //get tif writer and set output to file iterator<imagewriter> writers = imageio.getimagewritersbyformatname("tiff"); imagewriter writer = writers.next(); bufferedimage bi = reader.read(0); iioimage image = new iioimage(bi,null,reader.getimagemetadata(0)); tempfile = tempimagefile(imagefile); imageoutputstream ios = imageio.createimageoutputstream(tempfile); writer.setoutput(ios); writer.write(streammetadata, image, tiffwriteparam); ios.close(); writer.dispose(); reader.dispose(); } catch (ioexception e) { e.printstacktrace(); } return tempfile; } private static file tempimagefile(file imagefile) { string path = imagefile.getpath(); stringbuffer strb = new stringbuffer(path); strb.insert(path.lastindexof('.'),0); return new file(strb.tostring().replacefirst("(?<=//.)(//w+)$", "tif")); } } |
b.ocr核心類
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package ocr; import java.io.bufferedreader;import java.io.file;import java.io.fileinputstream;import java.io.inputstreamreader;import java.util.arraylist;import java.util.list; import org.jdesktop.swingx.util.os; public class ocr { private final string lang_option = "-l"; //英文字母小寫l，并非數(shù)字1 private final string eol = system.getproperty("line.separator"); private string tesspath = "c://program files//tesseract-ocr"; //private string tesspath = new file("tesseract").getabsolutepath(); public string recognizetext(file imagefile,string imageformat)throws exception{ file tempimage = imageiohelper.createimage(imagefile,imageformat); file outputfile = new file(imagefile.getparentfile(),"output"); stringbuffer strb = new stringbuffer(); list<string> cmd = new arraylist<string>(); if(os.iswindowsxp()){ cmd.add(tesspath+"//tesseract"); }else if(os.islinux()){ cmd.add("tesseract"); }else{ cmd.add(tesspath+"//tesseract"); } cmd.add(""); cmd.add(outputfile.getname()); //cmd.add(lang_option); //cmd.add("chi_sim"); //cmd.add("eng"); processbuilder pb = new processbuilder(); pb.directory(imagefile.getparentfile()); cmd.set(1, tempimage.getname()); pb.command(cmd); pb.redirecterrorstream(true); process process = pb.start(); //tesseract.exe 1.jpg 1 -l chi_sim int w = process.waitfor(); //刪除臨時(shí)正在工作文件 tempimage.delete(); if(w==0){ bufferedreader in = new bufferedreader(new inputstreamreader(new fileinputstream(outputfile.getabsolutepath()+".txt"),"utf-8")); string str; while((str = in.readline())!=null){ strb.append(str).append(eol); } in.close(); }else{ string msg; switch(w){ case 1: msg = "errors accessing files.there may be spaces in your image's filename."; break; case 29: msg = "cannot recongnize the image or its selected region."; break; case 31: msg = "unsupported image format."; break; default: msg = "errors occurred."; } tempimage.delete(); //throw new runtimeexception(msg); } new file(outputfile.getabsolutepath()+".txt").delete(); return strb.tostring(); }} |
c.main
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package ocr;import java.io.file;import java.io.ioexception; public class testocr { /** * @param args */ public static void main(string[] args) { //輸入圖片地址 string path = "d://test//test.bmp"; try { string valcode = new ocr().recognizetext(new file(path), "bmp"); system.out.println(valcode); } catch (ioexception e) { e.printstacktrace(); } catch (exception e) { e.printstacktrace(); } } } |
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/gaokao2011/article/details/23421477
