Dynamsoft Developer Blog

Dynamsoft is the only company that provides enterprise-class Python Barcode and QR Code SDK for Windows, Linux, macOS, and Raspberry Pi OS. The SDK allows developers to quickly build robust command-line, web, and desktop applications that can scan barcodes and QR codes from a wide range of sources. In this...

A few days ago, I wrote a blog post about how to implement a desktop barcode reader application using Qt and C++. The application only supports still image mode. In this article, I am going to add a webcam support to empower the application to scan barcodes in real time....

Cameras are now ubiquitous in our life. Every mobile phone has built-in cameras which can shoot nice photos. As for document scanning, there is document camera (also called overhead scanner) which is adjustable and has high resolution. Image source: https://www.amazon.com/Conferencing-Recording-Classroom-Real-time-Definition/dp/B08V4WLPX1/ A document camera has the following benefits: Users don’t have...

This article will guide you through the creation of a JavaFX GUI barcode reading application (as shown below) using Dynamsoft Barcode Reader SDK (DBR) and vlcj. JavaFX is an open-source, next-generation client application platform for desktop, mobile, and embedded systems built on Java.1 vlcj is a Java framework to allow...

During the pandemic, the demand for camera apps is booming due to the social distancing situation. So, I collected some basic OpenCV webcam sample code implemented in different programming languages and built some simple web apps for remote webcam access. Hopefully, it will be helpful for someone who is getting...

A dot code is a 2D barcode symbology composed of disconnected dots. It is widely used in the tobacco industry. Recently, Dynamsoft rolled out barcode reader SDK v7.4, which added DotCode support. In this post, I will share a command-line app and a GUI app, demonstrating how to build Java DotCode...

While using laptops, sometimes you may want to disable the built-in webcam for some reasons, such as security or debugging webcam related programs. Not like a USB webcam, the built-in camera is unpluggable. Therefore, a general way is to open the device manager, find the camera, and disable it. To...

In Dynamsoft Barcode Reader SDK, there is a fancy webcam barcode sample called BarcodeReaderDemo that supports reading barcodes from disk files, TWAIN-compatible hardware scanners, and USB webcams. However, one thing you have to know is the functionality of acquiring images from peripheral devices relies on Dynamic .NET TWAIN, which is...

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. What...

Someone asked me how to create a real-time web barcode scanning app with a webcam. Is it hard to implement it? I’ve written an article sharing how to integrate Dynamsoft JavaScript Barcode Reader SDK into a React project. The remaining work is to make a webcam component. Since there is...

In my previous article, I shared how to use PyQt and Dynamsoft Barcode Reader to create a simple Windows-styled GUI app to read barcodes from image files. Now I am going to add a little bit more code to scan barcodes from the webcam video stream. Showing Webcam Video Stream using PyQt...

For the past week, I was looking for a live streaming solution to broadcast video from a USB webcam that connects to Raspberry Pi. This post will help you set up a live streaming server on Raspberry Pi step by step. Installing FFmpeg on Raspberry Pi My first try was to...

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...

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...

OpenCV officially provides both C++ and Python APIs for developers. Most of the time, developers just need to use one kind of programming languages to read, write and process images with hundreds of computer vision algorithms. However, if you want to use OpenCV Python APIs with an extended C/C++ library,...

Previously I shared how to use Touchless, which wraps the win32 APIs of DirectShow, to control webcam in C#. In this article, let’s take a further step to see how to use the more complicated DirectShow.NET APIs to capture the video stream and read barcode from preview frames on Windows. Resources for Learning DirectShow.NET DirectShow.NET...

When building a .NET application to read barcodes on Windows via camera, you need two types of SDKs - one for webcam, and the other for barcodes. In this post, I want to share how to use .Net webcam and barcode SDKs to create a simple WinForm barcode reader application...

If you have a USB camera, how can you build a simple C# camera application on Windows 10? There are three options:  WIA (Windows Imaging Acquisition), DirectShow and MediaCapture. After trying some sample code that downloaded from CodeProject and GitHub, I got the conclusion: 1. WIA is not good because...

Dynamsoft Barcode Reader C++ SDK is available for Windows, Linux, and Mac (iOS and Android editions are coming soon). I have shared an article that illustrates how to build webcam barcode reader in Python. In this tutorial, I’ll use a different C++ API to implement barcode scanner applications for Windows...

Previously, I shared an article describing how to create an online barcode reader using Node.js, which turned Raspberry Pi into a web server. Today, I want to do another experiment – building a  Raspberry Pi barcode scanner with a USB webcam. For taking HD video and photo, you can choose...

In this tutorial, I want to make a more complicated WebSocket demo, which enables me to capture images from scanners on server side, and view the images in desktop web browsers or mobile web browsers. Here is the flowchart:   Prerequisites Read Image Transmission between a HTML5 WebSocket Server and...

In the previous blog post, I have glanced at HTML5. Probably many people have already experienced some cool functions of HTML5. In this article, I would like to share how to invoke Webcam in HTML5. While strolling through StackOverflow, I found there are many questions about how to display webcam...

Control web cameras or the built-in laptop webcams inside IE, Firefox and Chrome with JavaScript In some scenarios, such as Visitor Monitoring module for a government department or Patient Tracking module for a hospital, we may need to take a snap of human faces, patient charts, user IDs and so...

Control web cameras from browsers with Dynamic Webcam API Introduction to the Webcam Library Dynamic Webcam SDK is a browser plugin which enables users to acquire images from a webcam, edit and then upload/save them to a database, web server or local disk. Also, it can capture a live video stream into...