When I was using CPython to create the Python barcode extension with Dynamsoft Barcode Reader, I had to take concern for the compatibility of Python versions. However, I’m reluctant to install all Python versions in my operating system. To test the compatibility of my Python barcode app in Windows, I picked Docker container as the workaround.Read more
When scanning barcodes, the recognition rate is affected by image quality. If a barcode image is severely damaged, the barcode algorithm may fail to work. Fortunately, most of the linear barcodes (1D barcode) are printed with corresponding texts. OCR (optical character recognition) algorithm could be a complement to the barcode algorithm in such a scenario. In this article, I will share how to use Tesseract OCR to boost the barcode scan.Read more
MyGet is a universal package manager that allows you to create custom package feeds for Python, Maven, NuGet, npm, Bower, PHP, Vsix, and Ruby Gems. For me, the most significant advantage of using MyGet is I can overwrite the package with the same version number comparing to other package repositories like PyPi and npmjs. This article shares how to upload Dynamsoft Barcode Reader packages to MyGet and how to install the packages for relevant projects.Read more
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 more
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 more
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.
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.
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.
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.
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.