How to Use Multiprocessing to Optimize Python Barcode Reader

Previously, I demonstrated how to use OpenCV and Dynamsoft Barcode SDK to build a Python barcode reader. There’s one problem that when barcode decoding takes a long time, the webcam video didn’t play smoothly. I also tried multithread but failed to tackle the issue either due to the Python GIL(Global Interpreter Lock). Now I’m inspired by multiprocessing which is the recommended way to break through the bottleneck.

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The Preview of Dynamsoft WebAssembly Barcode SDK

WebAssembly (Wasm) is a revolutionary technology for Web development. It aims to execute at native speed in web browsers. With WebAssembly, it is convenient to port C/C++ code for web client and server applications. Dynamsoft Barcode Reader 6.2 is the most potent barcode SDK ever, and its WebAssembly edition is on the way. Let’s see what we can do with the preview edition of Dynamsoft WebAssembly barcode SDK.

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Binding Android Library for Xamarin is A Disaster

.NET developers like Xamarin because they can develop Android and iOS apps in C#. However, if you are not afraid of learning new programming languages, you’d better choose Kotlin for Android and Swift for iOS. Unlike React Native, Flutter and Cordova, with Xamarin, you cannot create one codebase for both platforms in Visual Studio. Moreover, when you try to bind a complicated and obfuscated Android library, you may be in big trouble.  I just suffered from the pain of binding Dynamsoft Camera SDK for Android.

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How to Host Maven Repository for Android AAR File on IIS

If you have a .jar or a .aar file for distribution, you can publish it to Maven central or jcenter. But the premise is your package has to be open source. If you want to distribute a commercial library, you’d better host a Maven repository yourself. Inspired by STEFFENWELLNER’s article, I have successfully set up a Maven repository on IIS. The post includes how to create an AAR project, how to configure IIS and URL, as well as how to create a testing project.

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Why You Should Use A Commercial Barcode SDK for Business

ZXing is probably the most popular open source barcode SDK in the world. The library is written in Java and now has been ported to C++, .NET, Python, Objective-C, PHP and some other programming languages. Because ZXing is free, many developers would like to build barcode scanning apps with it. However, it is not competent for complicated business cases especially for images with multiple barcodes. In this article, I will show how to create a .NET barcode reader step by step and compare the performance difference between ZXing.Net and Dynamsoft Barcode Reader.

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How to Create, Extract and Update Tar GZIP File in Windows

Recently, our team needs to regularly update Tar GZIP files that are built for Linux on Windows.  GZIP is a file format for file compression and decompression. Unlike ZIP, GZIP is used to compress just one single file. Usually, we have to assemble files into a single tar archive, and then compress that archive with gzip (.tar.gz or .tgz). I spent some time looking for the workaround of packaging TAR GZIP files on Windows.

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