Last month, Microsoft released .NET Core 3.0 that allows developers to port Windows Forms and Windows Presentation Foundation (WPF) projects to the .NET Core projects. However, the feature is still Windows-only, which may disappoint someone who wants to create cross-platform GUI apps based on .NET Core. In this article, I will share how to create a simple Windows GUI barcode reader app on .NET Framework, and then port it to .NET Core.
Read moreTag: Barcode
How to Build ZXing C++ to Wasm using WASI SDK in Linux
WASI is a modular system interface, which aims to build runnable .wasm modules for any WASI-compliant runtime, not only for Node.js and web browsers. Although WASI is still in development and not stable yet, it is available for some experimental projects. In this article, I will share how to use WASI SDK to build a .wasm barcode reader module by porting ZXing C++.
Read moreDecoding Direct Part Marking (DPM) Barcode
Direct Part Marking (DPM) is a process to mark equipment with some information, such as barcodes, permanently. The typical DPM barcode symbologies include DataMatrix and QR code. Since version 7.2, Dynamsoft Barcode Reader SDK has been capable of decoding DPM barcodes. In this article, I will share how to create a simple python barcode reader to read the DPM DataMatrix code.
Downloading Barcode Images from Google for SDK Test
When evaluating an image processing and recognition SDK, image dataset is vital for benchmarking the performance. Google is absolutely the best place for finding and downloading required images. An automation tool would be handy for getting amounts of image files rapidly. In this article, I will share how to use Python to download barcode images from Google, as well as how to test Dynamsoft Barcode Reader SDK with the image set.
How to Create A Simple Flutter Barcode Plugin from Scratch
I think Flutter is vital for developers. Not only it supports fast building Android and iOS apps from a single codebase, but also it is used for building the upcoming Google Fuchsia apps. Like React Native and Cordova, the Flutter ecosystem consists of amounts of plugins, which empower Flutter apps, especially for platform-specific functionalities. In this article, I will share how to create a simple Flutter barcode plugin with Dynamsoft Barcode Reader SDK from scratch.
Python Barcode Decoding on Non-Python Created Thread
Dynamsoft Barcode Reader 7.0 brings a set of thread-based APIs for continuous frame management and corresponding barcode decoding. It extremely simplifies the programming complexity, especially for Python. It is known that Python’s GIL (Global Interpreter Lock) affects the performance in a multi-threaded scenario. Running computation intensive tasks in Python thread cannot improve the Python app performance. If you create a Python barcode scanner app with OpenCV and Dynamsoft Barcode Reader 6.x, Python multiprocessing is the only way for getting a high camera frame rate. With the thread-based APIs of Dynamsoft Barcode Reader 7.x, your Python apps will not be limited by GIL anymore. This tutorial shares how to integrate the thread-based C/C++ APIs into Python barcode extension.
Using Android NDK to Optimize Barcode Reading Performance
Previously, I shared an article demonstrating how to use Camera2 APIs and Dynamsoft Barcode Reader to build a simple Android barcode reader app. In that demo project, the barcode decoding part is implemented in Java, which apparently has room for improvement. If we can get the pointer to the native buffer of the camera frame, we can invoke native Barcode Reader APIs directly. This article shares how to write JNI code for Android barcode detection, as well as how to use Android NDK and CMake to build the C++ code.
Bundling Dynamsoft JavaScript Barcode Library with Webpack
Webpack is a JavaScript module bundler. It is widely used in web frameworks, such as React and Angular. This tutorial shows how to implement a simple web barcode reading app with webpack and Dynamsoft JavaScript Barcode library.
Making a Barcode Scan Robot with Lego Boost and Webcam
If you want to quickly create a walking robot, you can use the Lego Boost. In this post, I will share how to use a webcam, Lego Boost, and Dynamsoft Barcode Reader SDK to make a robot for scanning barcodes. The programming language used in this article is Python.
Android Barcode Detection from Fast Moving Objects
Assume you apply barcode technology to the logistics conveyor belt for scanning parcels. A problem you may face is how to recognize barcodes from blurred images. Although we can use advanced algorithms to deal with this complicated case, we’d better improve the image quality as possible as we can. A simple way is to adjust the camera shutter speed which is also known as exposure time. Faster shutter speed can avoid motion blur. In this post, I will share how to invoke Android Camera2 APIs to change the shutter speed, as well as how to build a simple Android barcode reader to decode barcodes from fast-moving objects
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