tesseract-ocr 3.0.2 iPhone编译 xcode6 sdk8

编译的过程中需要一些额外的组件，有可能MAC下没有，我的电脑上是下面的这些需要安装。如有不同，可自行查找错误信息，安装缺失的工具。

MAC下安装autoconf和automake

• 安装m4

• curl -O http://mirrors.kernel.org/gnu/m4/m4-1.4.16.tar.gztar -xzvf m4-1.4.16.tar.gzcd m4-1.4.16./configure --prefix=/usr/localmakesudo make install

  
  
  

• 安装autoconf

curl -O http://mirrors.kernel.org/gnu/autoconf/autoconf-2.69.tar.gztar -xzvf autoconf-2.69.tar.gzcd autoconf-2.69./configure --prefix=/usr/localmakesudo make install

• 安装automake

• curl -O http://mirrors.kernel.org/gnu/automake/automake-1.13.tar.gztar -xzvf automake-1.13.tar.gzcd automake-1.13./configure --prefix=/usr/localmakesudo make install

  
  
  
• 安装libtool

• curl -O http://mirrors.kernel.org/gnu/libtool/libtool-2.4.tar.gztar -xzvf libtool-2.4.tar.gzcd libtool-2.4./configure --prefix=/usr/localmakesudo make install

  
  
  

编译tesseract

在本地新建一个文件夹，如：build_tesseract将下面2个主要组件下载解压到此文件夹下.命令如下：

mkdir build_tesseractcd build_tesseract

在此文件夹下进行下面的命令：

• tesseract-ocr-3.02

curl -O http://tesseract-ocr.googlecode.com/files/tesseract-ocr-3.02.02.tar.gztar -xzvf tesseract-ocr-3.02.02.tar.gz

• leptonica-1.69

curl -O http://www.leptonica.com/source/leptonica-1.69.tar.gztar -xzvf leptonica-1.69.tar.gz

• 创建编译脚本 build.sh

• #!/bin/sh# Written by @kevincon, based on @williamsodell's modifications to @gali8's# original build_dependencies.sh script.# See README_howto_compile_libaries.md for full instructions.GLOBAL_OUTDIR="`pwd`/build"LOCAL_OUTDIR="./outdir"LEPTON_LIB="`pwd`/leptonica-1.71"TESSERACT_LIB="`pwd`/tesseract-3.03"IOS_BASE_SDK="7.0"IOS_DEPLOY_TGT="7.0"export CXX=`xcrun -find c++`export CC=`xcrun -find cc`export LD=`xcrun -find ld`export AR=`xcrun -find ar`export AS=`xcrun -find as`export NM=`xcrun -find nm`export RANLIB=`xcrun -find ranlib`XCODE_DEVELOPER_PATH=/Applications/Xcode.app/Contents/DeveloperXCODETOOLCHAIN_PATH=$XCODE_DEVELOPER_PATH/Toolchains/XcodeDefault.xctoolchainSDK_IPHONEOS_PATH=$(xcrun --sdk iphoneos --show-sdk-path)SDK_IPHONESIMULATOR_PATH=$(xcrun --sdk iphonesimulator --show-sdk-path)export PATH="$XCODETOOLCHAIN_PATH/usr/bin:$PATH"declare -a archsarchs=(arm7 arm7s arm64 i386 x86_64)declare -a arch_namearch_names=(arm-apple-darwin7 arm-apple-darwin7s arm-apple-darwin64 i386-apple-darwin x86_64-apple-darwin)setenv_all() {# Add internal libsexport CFLAGS="$CFLAGS -I$GLOBAL_OUTDIR/include -L$GLOBAL_OUTDIR/lib -Qunused-arguments"export LDFLAGS="-L$SDKROOT/usr/lib/"export CPPFLAGS=$CFLAGSexport CXXFLAGS=$CFLAGS}setenv_arm7() {unset DEVROOT SDKROOT CFLAGS CPP CXXCPP LDFLAGS CPPFLAGS CXXFLAGSexport SDKROOT=$SDK_IPHONEOS_PATHexport CFLAGS="-arch armv7 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"setenv_all}setenv_arm7s() {unset DEVROOT SDKROOT CFLAGS CPP CXXCPP LDFLAGS CPPFLAGS CXXFLAGSexport SDKROOT=$SDK_IPHONEOS_PATHexport CFLAGS="-arch armv7s -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"setenv_all}setenv_arm64() {unset DEVROOT SDKROOT CFLAGS CPP CXXCPP LDFLAGS CPPFLAGS CXXFLAGSexport SDKROOT=$SDK_IPHONEOS_PATHexport CFLAGS="-arch arm64 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"setenv_all}setenv_i386() {unset DEVROOT SDKROOT CFLAGS CPP CXXCPP LDFLAGS CPPFLAGS CXXFLAGSexport SDKROOT=$SDK_IPHONESIMULATOR_PATHexport CFLAGS="-arch i386 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT"setenv_all}setenv_x86_64() {unset DEVROOT SDKROOT CFLAGS CPP CXXCPP LDFLAGS CPPFLAGS CXXFLAGSexport SDKROOT=$SDK_IPHONESIMULATOR_PATHexport CFLAGS="-arch x86_64 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT"setenv_all}create_outdir_lipo() {for file in `find $LOCAL_OUTDIR/i386 -name "lib*.a"`; dolib_arm7=`echo $file | sed "s/i386/arm7/g"`lib_arm7s=`echo $file | sed "s/i386/arm7s/g"`lib_arm64=`echo $file | sed "s/i386/arm64/g"`lib_x86_64=`echo $file | sed "s/i386/x86_64/g"`lib_i386=`echo $file`lib=`echo $file | sed "s/i386//g"`xcrun -sdk iphoneos lipo -arch armv7s $lib_arm7s -arch armv7 $lib_arm7 -arch arm64 $lib_arm64 -arch i386 $lib_i386 -arch x86_64 $lib_x86_64 -create -output $libdone}merge_libfiles() {DIR=$1LIBNAME=$2cd $DIRfor i in `find . -name "lib*.a"`; do$AR -x $idone$AR -r $LIBNAME *.orm -rf *.o __*cd -}######################## Start clean#######################rm -rf $GLOBAL_OUTDIR lib include######################## LEPTONLIB#######################cd $LEPTON_LIBrm -rf $LOCAL_OUTDIRfor n in "${!archs[@]}"domkdir -p "$LOCAL_OUTDIR/${archs[$n]}"make clean 2> /dev/nullmake distclean 2> /dev/nulleval "setenv_${archs[$n]}"./configure --host="${arch_names[$n]}" --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiffmake -j12cp -rvf src/.libs/lib*.a "$LOCAL_OUTDIR/${archs[$n]}"donecreate_outdir_lipomkdir -p $GLOBAL_OUTDIR/include/leptonica && find ./ -name '*.h' -exec cp {} $GLOBAL_OUTDIR/include/leptonica/  \;mkdir -p $GLOBAL_OUTDIR/lib && cp -rvf $LOCAL_OUTDIR/lib*.a $GLOBAL_OUTDIR/libcd ..######################## TESSERACT-OCR#######################cd $TESSERACT_LIBrm -rf $LOCAL_OUTDIRfor n in "${!archs[@]}"domkdir -p "$LOCAL_OUTDIR/${archs[$n]}"make clean 2> /dev/nullmake distclean 2> /dev/nulleval "setenv_${archs[$n]}"bash autogen.shLIBLEPT_HEADERSDIR=$GLOBAL_OUTDIR/include ./configure --host="${arch_names[$n]}" --enable-shared=no --disable-graphicsmake -j12for i in `find . -name "lib*.a" | grep -v $LOCAL_OUTDIR`; do cp -rvf $i "$LOCAL_OUTDIR/${archs[$n]}"; donemerge_libfiles "$LOCAL_OUTDIR/${archs[$n]}" libtesseract_all.adonecreate_outdir_lipomkdir -p $GLOBAL_OUTDIR/include/tesseract && find ./ -name '*.h' -exec cp {} $GLOBAL_OUTDIR/include/tesseract/  \;mkdir -p $GLOBAL_OUTDIR/lib && cp -rvf $LOCAL_OUTDIR/lib*.a $GLOBAL_OUTDIR/libmake clean 2> /dev/nullmake distclean 2> /dev/nullcd ..######################## Copying#######################cp -rf $GLOBAL_OUTDIR/include .mkdir -p libcp -rf $GLOBAL_OUTDIR/lib/libtesseract_all.a $GLOBAL_OUTDIR/lib/liblept.a lib/echo "Finished!"

  • • 给 build.sh 添加执行权限,并执行
    
    

   

  chmod +x build.sh./build.sh

  
  注意：有可能会报这个错误：

  autoheader: error: AC_CONFIG_HEADERS not found in configure.ac

  
  

  这时需要修改 tesseract-3.02.02/configure.ac 文件

  #AM_INIT_AUTOMAKE(dist-zip) AM_INIT_AUTOMAKE#AM_CONFIG_HEADER(config_auto.h:config/config.h.in)  //将这句注释AC_CONFIG_HEADER(config_auto.h:config/config.h.in) //修改为这个

  
  
  
• 使用

• Tesseract.h

////  Tesseract.h//  Tesseract//#import <Foundation/Foundation.h>@interface Tesseract : NSObject {    NSString* _dataPath;    NSString* _language;    NSMutableDictionary* _variables;}+ (NSString *)version;- (id)initWithDataPath:(NSString *)dataPath language:(NSString *)language;- (void)setVariableValue:(NSString *)value forKey:(NSString *)key;- (void)setImage:(UIImage *)image;- (BOOL)setLanguage:(NSString *)language;- (BOOL)recognize;- (NSString *)recognizedText;@end

• Tesseract.mm

////  Tesseract.mm//  Tesseract//#import "Tesseract.h"#import "baseapi.h"#import "environ.h"#import "pix.h"namespace tesseract {    class TessBaseAPI;};@interface Tesseract () {    tesseract::TessBaseAPI* _tesseract;    uint32_t* _pixels;}@end@implementation Tesseract+ (NSString *)version {    return [NSString stringWithFormat:@"%s", tesseract::TessBaseAPI::Version()];}- (id)initWithDataPath:(NSString *)dataPath language:(NSString *)language {    self = [super init];    if (self) {        _dataPath = dataPath;        _language = language;        _variables = [[NSMutableDictionary alloc] init];        [self copyDataToDocumentsDirectory];        _tesseract = new tesseract::TessBaseAPI();        BOOL success = [self initEngine];        if (!success) {            return NO;        }    }    return self;}- (BOOL)initEngine {    int returnCode = _tesseract->Init([_dataPath UTF8String], [_language UTF8String]);    return (returnCode == 0) ? YES : NO;}- (void)copyDataToDocumentsDirectory {    // Useful paths    NSFileManager *fileManager = [NSFileManager defaultManager];    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentPath = ([documentPaths count] > 0) ? [documentPaths objectAtIndex:0] : nil;    NSString *dataPath = [documentPath stringByAppendingPathComponent:_dataPath];    // Copy data in Doc Directory    if (![fileManager fileExistsAtPath:dataPath]) {        NSString *bundlePath = [[NSBundle bundleForClass:[self class]] bundlePath];        NSString *tessdataPath = [bundlePath stringByAppendingPathComponent:_dataPath];        if (tessdataPath) {            [fileManager createDirectoryAtPath:documentPath withIntermediateDirectories:YES attributes:nil error:NULL];            [fileManager copyItemAtPath:tessdataPath toPath:dataPath error:nil];        }    }    setenv("TESSDATA_PREFIX", [[documentPath stringByAppendingString:@"/"] UTF8String], 1);}- (void)setVariableValue:(NSString *)value forKey:(NSString *)key {    /*     * Example:     * _tesseract->SetVariable("tessedit_char_whitelist", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");     * _tesseract->SetVariable("language_model_penalty_non_freq_dict_word", "0");     * _tesseract->SetVariable("language_model_penalty_non_dict_word ", "0");     */    [_variables setValue:value forKey:key];    _tesseract->SetVariable([key UTF8String], [value UTF8String]);}- (void)loadVariables {    for (NSString* key in _variables) {        NSString* value = [_variables objectForKey:key];        _tesseract->SetVariable([key UTF8String], [value UTF8String]);    }}- (BOOL)setLanguage:(NSString *)language {    _language = language;    int returnCode = [self initEngine];    if (returnCode != 0) return NO;    /*     * "WARNING: On changing languages, all Tesseract parameters     * are reset back to their default values."     */    [self loadVariables];    return YES;}- (BOOL)recognize {    int returnCode = _tesseract->Recognize(NULL);    return (returnCode == 0) ? YES : NO;}- (NSString *)recognizedText {    char* utf8Text = _tesseract->GetUTF8Text();    return [NSString stringWithUTF8String:utf8Text];}- (void)setImage:(UIImage *)image{    free(_pixels);    CGSize size = [image size];    int width = size.width;    int height = size.height;  if (width <= 0 || height <= 0) {      return;    }    _pixels = (uint32_t *) malloc(width * height * sizeof(uint32_t));    // Clear the pixels so any transparency is preserved    memset(_pixels, 0, width * height * sizeof(uint32_t));    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();    // Create a context with RGBA _pixels    CGContextRef context = CGBitmapContextCreate(_pixels, width, height, 8, width * sizeof(uint32_t), colorSpace,                                                 kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedLast);    // Paint the bitmap to our context which will fill in the _pixels array    CGContextDrawImage(context, CGRectMake(0, 0, width, height), [image CGImage]);  // We're done with the context and color space    CGContextRelease(context);    CGColorSpaceRelease(colorSpace);    _tesseract->SetImage((const unsigned char *) _pixels, width, height, sizeof(uint32_t), width * sizeof(uint32_t));}@end

Code Sample

#import "Tesseract.h"Tesseract* tesseract = [[Tesseract alloc] initWithDataPath:@"tessdata" language:@"eng"];[tesseract setVariableValue:@"0123456789" forKey:@"tessedit_char_whitelist"]; //白名单[tesseract setImage:[UIImage imageNamed:@"image_sample.jpg"]];  //验证码图片[tesseract recognize];NSLog(@"%@", [tesseract recognizedText]);