1、安装过程：
安装ocr
yum install tesseract-ocr
查找中文包
yum search tesseract-ocr | grep sim
安装中文包
yum install tesseract-langpack-chi_sim
安装版本信息：
? test-ugc-api01 tesseract tesseract -v
tesseract 3.04.00
leptonica-1.72
libgif 4.1.6(?) : libjpeg 6b (libjpeg-turbo 1.2.90) : libpng 1.5.13 : libtiff 4.0.3 : zlib 1.2.7 : libwebp 0.3.0
2、java开发
注意版本匹配：3.04.00，采用tess4j
< dependency > < groupId > net.sourceforge.tess4j </ groupId > < artifactId > tess4j </ artifactId > < version > 3.0 . 0 </ version > </ dependency >
简单测试代码
public String ocr(String url) { String datapath = " /usr/share/tesseract/ " ; String language = " chi_sim " ; // 进行相关的检测 try { url = url.trim(); System. out .println( " url is: " + url); URL targetUrl = new URL(url); BufferedImage image = ImageIO.read(targetUrl); ByteBuffer buf = ImageIOHelper.convertimageData(image); int bpp = image.getColorModel().getPixelSize(); int bytespp = bpp / 8 ; int bytespl = ( int ) Math.ceil(image.getWidth() * bpp / 8.0 ); System. out .println( " bpp is: " + bpp + " ;bytespp is: " + bytespp + " ;bytespl is: " + bytespl); // 初始化 ITessAPI.TessBaseAPI handle = TessAPI1.TessBaseAPICreate(); TessAPI1.TessBaseAPIInit3(handle,datapath,language); TessAPI1.TessBaseAPISetPageSegMode(handle,ITessAPI.TesspageSegMode.PSM_AUTO); Pointer utf8Text = TessAPI1.TessBaseAPIRect(handle,buf,bytespp,bytespl, 0 ,image.getWidth(),image.getHeight()); String result = utf8Text.getString( 0 ); TessAPI1.TessDeleteText(utf8Text); TessAPI1.TessBaseAPIDelete(handle); System. out .println( " ============================================== " ); System. out .println( " result is: " + result); System. out .println( " ============================================== " ); if (result.equalsIgnoreCase( "" )){ System. out .println( " no detected words!! " ); } return result; } catch (Exception ex){ ex.printstacktrace(); } return " no detected words!! " ; }
注意：datapath要设置在tessdata的上一级目录
3、yum安装所在目录查询相关命令
#查询相关包 test - ugc - api01 tesseract rpm - qa | grep tesseract tesseract - langpack - chi_sim - 3.04 . 00 - 3 .el7.noarch tesseract - 3.04 . 00 - 3 .el7.x86_64 #查询包具体安装位置 test - ugc - api01 tesseract rpm - ql tesseract - 3.04 . 00 - 3 .el7.x86_64 / usr / bin / ambiguous_words / usr / bin / classifier_tester / usr / bin / cntraining / usr / bin / combine_tessdata / usr / bin / dawg2wordlist / usr / bin / mftraining / usr / bin / set_unicharset_properties / usr / bin / shapeclustering / usr / bin / tesseract / usr / bin / text2image / usr / bin / unicharset_extractor / usr / bin / wordlist2dawg / usr / lib64 / libtesseract.so. 3 / usr / lib64 / libtesseract.so. 3.0 . 4 / usr / share / doc / tesseract - 3.04 . 00 / usr / share / doc / tesseract - 3.04 . 00 / AUTHORS / usr / share / doc / tesseract - 3.04 . 00 / ChangeLog / usr / share / doc / tesseract - 3.04 . 00 / NEWS / usr / share / doc / tesseract - 3.04 . 00 / README / usr / share / doc / tesseract - 3.04 . 00 / eurotext.tif / usr / share / doc / tesseract - 3.04 . 00 / phototest.tif / usr / share / licenses / tesseract - 3.04 . 00 / usr / share / licenses / tesseract - 3.04 . 00 / copYING / usr / share / man / man1 / ambiguous_words. 1 .gz / usr / share / man / man1 / cntraining. 1 .gz / usr / share / man / man1 / combine_tessdata. 1 .gz / usr / share / man / man1 / dawg2wordlist. 1 .gz / usr / share / man / man1 / mftraining. 1 .gz / usr / share / man / man1 / shapeclustering. 1 .gz / usr / share / man / man1 / tesseract. 1 .gz / usr / share / man / man1 / unicharset_extractor. 1 .gz / usr / share / man / man1 / wordlist2dawg. 1 .gz / usr / share / man / man5 / unicharambigs. 5 .gz / usr / share / man / man5 / unicharset. 5 .gz / usr / share / tesseract / usr / share / tesseract / tessdata / usr / share / tesseract / tessdata / configs / usr / share / tesseract / tessdata / configs / ambigs.train / usr / share / tesseract / tessdata / configs / api_config / usr / share / tesseract / tessdata / configs / bigram / usr / share / tesseract / tessdata / configs / Box.train / usr / share / tesseract / tessdata / configs / Box.train.stderr / usr / share / tesseract / tessdata / configs / digits / usr / share / tesseract / tessdata / configs / hocr / usr / share / tesseract / tessdata / configs / inter / usr / share / tesseract / tessdata / configs / kannada / usr / share / tesseract / tessdata / configs / lineBox / usr / share / tesseract / tessdata / configs / logfile / usr / share / tesseract / tessdata / configs / makeBox / usr / share / tesseract / tessdata / configs / pdf / usr / share / tesseract / tessdata / configs / quiet / usr / share / tesseract / tessdata / configs / reBox / usr / share / tesseract / tessdata / configs / strokewidth / usr / share / tesseract / tessdata / configs / unlv / usr / share / tesseract / tessdata / eng.cube.bigrams / usr / share / tesseract / tessdata / eng.cube.fold / usr / share / tesseract / tessdata / eng.cube.lm / usr / share / tesseract / tessdata / eng.cube.nn / usr / share / tesseract / tessdata / eng.cube. params / usr / share / tesseract / tessdata / eng.cube.size / usr / share / tesseract / tessdata / eng.cube.word - freq / usr / share / tesseract / tessdata / eng.tesseract_cube.nn / usr / share / tesseract / tessdata / eng.traineddata / usr / share / tesseract / tessdata / pdf.ttf / usr / share / tesseract / tessdata / tessconfigs / usr / share / tesseract / tessdata / tessconfigs / batch / usr / share / tesseract / tessdata / tessconfigs / batch.nochop / usr / share / tesseract / tessdata / tessconfigs / matdemo / usr / share / tesseract / tessdata / tessconfigs / msdemo / usr / share / tesseract / tessdata / tessconfigs / nobatch / usr / share / tesseract / tessdata / tessconfigs / segdemo
查看.so文件接口
nm -D xxx.so