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libuv is a cross-platform C library for Node.js asynchronous I/O model. It implements Node.js event loop and uses a thread pool to avoid blocking the Node.js event loop with time-consuming I/O operations. The post shares how to use libuv to optimize Dynamsoft barcode addon for Node.js. Learning Resources Node.js C/C++ Addons...
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Dynamsoft has deployed a REST web service for barcode detection. This post shares how to call the service by sending HTTP POST request using Golang. Barcode Detection in Golang Environment IDE: JetBrain Gogland. Go 1.7.4. Windows 10. Workspace structure: <GOPATH> - src - bin - pkg Settings: GOROOT=E:\Go GOPATH=g:\gowork Basic...
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Cordova is a mobile application development framework that enables developers to build Android, iOS and Windows Phone apps using HTML5, JavaScript, and CSS3. It uses web views to render UI elements instead of the platform’s native UI framework. Cordova can be extended to add more functionalities with plugins. There are...
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Flutter, a framework developed by Google, aims to help developers build iOS and Android apps from a single codebase in Dart programming language. It is still an early-stage open-source project. The development environment only works on macOS and Linux (64-bit). I was curious about how Flutter performs comparing to Xamarin...
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I just finished reading the article - Native Extensions for the Standalone Dart VM. In this post, I will share my experience about how to build a Dart native extension from scratch with Dynamsoft C/C++ barcode SDK on Windows. Why Asynchronous Extension Dart is a single-threaded programming language, similar to...
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A few months ago, Google announced a new operating system named Fuchsia. It was my first time to hear about Dart, which is the primary programming language for Fuchsia. Dart is a programming language designed by Google. It is used to build the web (Dart webdev), mobile (Flutter) and server...
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NV21 is the default image format used by Android camera. Assume you want to save the data and view it as a BMP file on PC, how to write code in Java without Android image APIs? Let’s do it from scratch. What is NV21 NV21 is a kind of YUV...
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Visual Studio Code - a source code editor for Windows, Linux and macOS released by Microsoft - is getting more extensible and customizable. It is interesting to build an extension yourself. In this article, I will share how to create a simple HTML snippet extension for VS Code. Snippet for...
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If you want to open webcam stream in a web browser, what technology will you choose? Probably many developers’ answer is HTML5. Yes, with the JavaScript API getUserMedia, it will be pretty easy to open webcam within web browsers. However, the API is not supported by some old web browsers like...
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Previously, I wrote an article Raspberry Pi Barcode Scanner with Webcam and Python illustrating how to build a simple barcode scanner using Dynamsoft Barcode Reader SDK and OpenCV from scratch. The method decodeFile() was used for detecting barcodes from an image file. To use the API, you have to write...