Thou shalt programme
Update 2019-05-25: Added notes to help with changes and possible issues caused with more recent versions of CMake. Over the years I have written quite a few guides and tutorials that describe building OpenCV from sources for Windows, however they were mostly done using the GUI. It means you’d have to be using CMake GUI …
Continue reading “A Simple Script to Build OpenCV 3.4.3 for Windows”
In this post I will describe the process of of reading, performing any arbitrary image processing algorithm and displaying an image read from a video file, camera or RTSP feed using OpenCV , and the same time keeping the user interface (created using Qt) responsive.
[Updated this post on April 04, 2019, to make sure this tutorial is compatible with OpenCV 4.x and TensorFlow 2.0] In this post we’re going to learn how to create an image classifier application with a proper GUI that allows the users to choose a camera or a video file as the input and classify …
Continue reading “How to Create an Image Classifier Using Qt, OpenCV and TensorFlow”
Following a number of questions that appear before me every now and then, I decided to write a post about using CMake to create and build projects using Qt5 and OpenCV 3. For those of you who are qmake fans, using CMake doesn’t mean you can’t use Qt Creator to create and build your projects. …
Continue reading “How to Use CMake with Qt5 and OpenCV 3 Projects”
In this post I’ll describe how to combine the power of Qt and OpenCV to develop a good looking and fun object detector. The method explained here contains quite a few things to learn and use in your current and future projects, so let’s get started.
In this post I’m sharing the required steps for building OpenCV 3.3.X (to be precise, OpenCV 3.3.0 which was released about a week ago) for Android. You can also download the pre-built libraries from here but it’s always a good idea to build the libraries yourself in case you want any special configurations such as Nvidia Carotene, …
In this post I’m sharing the pre-built libraries and binaries for OpenCV that I use to build Qt/QML and OpenCV powered apps for Android (armeabi-v7a) phones. An example of such application is Quick-Camera-CV which I shared its source codes in a previous post.
In this post I am going to share a very simple but crucial parts of my QRecorder program which is recording images into videos. At the time of writing this article, Qt doesn’t allow recording of video files and OpenCV with its multi-platform support seems to be the best solution.
I start Qt for Android projects all the time and setting up all the required folders and including libraries can take some time, assuming that I don’t make any mistakes during the initialization of the project. Previously I had posted this about how to add OpenCV libraries to your Qt for Android project but it proved to …
Continue reading “Download Template Project – Qt for Android (with OpenCV)”
After receiving almost the same questions about Cascade Trainer GUI application all over again from many different users, I realized that it will be much more useful for anyone with a similar question, and much more efficient for me to actually compile a list of frequently asked questions, all the known issues and error and …
Continue reading “Cascade Classifier Training – FAQ, Known Issues and Workarounds”