ZXing(1)Barcode Image Library

ZXing(斑马穿越)是一款用于解码和编码条形码的库,包括核心图像解码库及多个客户端应用如Android版条码扫描器等。本文介绍如何准备和使用ZXing代码,涵盖下载、解压、构建过程,并导入Eclipse进行研究。

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ZXing(1)Barcode Image Library

1. Overview
ZXing(Zebra Crossing) is design to decode and encode barcode.

The consist of the library
core - The core image decoding library, and test code
Javase
Zxing.org
Android - Android client, called Barcode Scanner
Android-test
Android-integration - Support integration with our Barcode Scanner app via intern

Some other additional modules:
Cpp
IPhone - IPhone client + port to Objective C/C++
Zxing.appspot.com: The source behind our web-based barcode generator
CSharp
JRuby: Ruby wrapper
ActionScript

2. Prepare the codes
Download the latest version of file ZXing-2.1.zip and ZXing-2.1-testdata.zip.
Unzip the project ZXing-2.1.zip first, it contains everything and built by ANT.

The latest version, there are also MAVEN there.
>cd core
>ant
comments the sign part in pom.xml
>mvn clean install -DskipTests=true
>mvn eclipse:eclipse
Import the core part to eclipse to study.

>cd javase
>ant
>mvn eclipse:eclipse

I import this 2 projects in my eclipse and try to understand how it works.

The class I should begin with is
>cd ..
>java -cp javase/javase.jar:core/core.jar com.google.zxing.client.j2se.CommandLineRunner [URL | FILE]

Some important codes are as follow:
CommandLineRunner.java
CommandLineEncoder.java
DecodeThread.java
GenericMultipleBarcodeReader.java

2. Import the Android Code
Import Android project with exists codes
import the project android and it names CaptureActivity


References:
http://code.google.com/p/zxing/
http://code.google.com/p/zxing/w/list

http://www.cnblogs.com/liuan/archive/2012/01/05/2312714.html
http://www.cnblogs.com/liuan/archive/2012/01/05/2313488.html
http://www.cnblogs.com/liuan/archive/2012/01/09/2317377.html
http://www.cnblogs.com/liuan/archive/2012/01/10/2318300.html
### ZXing Library in C++ Implementation or Usage ZXing(Zebra Crossing)是一个开源的、多功能的条形码扫描库,最初为Java开发。然而,ZXing也提供了C++的实现版本[^1]。以下是关于ZXing在C++中的使用和实现的一些关键点: #### 1. ZXing C++ 概述 ZXing的C++版本支持多种一维和二维条形码格式,包括但不限于Code 128、EAN-13、QR Code等[^1]。其核心功能是通过图像处理算法识别并解码条形码或二维码。 #### 2. 安装与配置 为了在C++项目中使用ZXing,需要从官方GitHub仓库下载源代码[^1]。以下是一些基本步骤: - 克隆ZXing C++的仓库: ```bash git clone https://github.com/zxing/zxing.git ``` - 构建ZXing库: 使用CMake生成构建文件,并编译生成动态或静态库。 ```bash mkdir build && cd build cmake .. make ``` #### 3. 示例代码 以下是一个简单的示例,展示如何使用ZXing C++库来解码QR码: ```cpp #include "zxing/qrcode/QRCodeReader.h" #include "zxing/Binarizer.h" #include "zxing/MultiFormatReader.h" #include "zxing/common/GlobalHistogramBinarizer.h" #include "zxing/common/HybridBinarizer.h" #include "zxing/DecodeHints.h" #include <iostream> #include <memory> using namespace zxing; using namespace zxing::qrcode; int main() { MultiFormatReader reader; std::unique_ptr<DecoderResult> result; try { // 假设已经加载了图像数据到BinaryBitmap对象 Ref<BinaryBitmap> image(new BinaryBitmap(new GlobalHistogramBinarizer(source))); DecodeHints hints; Result decoded = reader.decode(*image, hints); std::cout << "Decoded content: " << decoded.getText()->getText() << std::endl; } catch (const ReaderException& e) { std::cerr << "Error decoding barcode: " << e.what() << std::endl; } return 0; } ``` 此代码片段展示了如何通过`MultiFormatReader`类解码条形码或二维码,并输出解码内容。 #### 4. 依赖项 ZXing C++依赖于一些外部库来完成图像处理任务。例如,OpenCV可以用于图像加载和预处理[^1]。确保在构建过程中正确链接这些依赖项。 #### 5. 性能优化 为了提高性能,可以调整Binarizer的选择(如`GlobalHistogramBinarizer`或`HybridBinarizer`),并根据具体需求调整解码提示(`DecodeHints`)。
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