You will need to include only the opencv2/opencv.hpp header file in your programAdd the using namespace cv; line just after including header files Data Types of
Elementary Linear Algebra
https://www.malabdali.com/wp-content/uploads/2020/08/Elementary-Linear-Algebra.pdf
Qt Painter
QPainter provides highly optimized functions to do most of the drawing GUI programs require. It can draw everything from simple lines to
Qt Images And Fonts
Qt provides four classes for handling image data: QImage, QPixmap, QBitmap and QPicture. QImage is designed and optimized for I/O, and for direct pixel access and
Widgets in Qt
The widget is the atom of the user interface: it receives mouse, keyboard and other events from the window system, and paints
I/O In Qt
Qt encapsulates the more generalized notion of byte streams in its QIODevice class, which is the parent class for QFile, as well as network I/O
C++ String
A string is very similar to a std::vectorThe following code snippet has the std::string name with the value RainerGrimm. I use the STL algorithm std::find_if to get
Multithreading With Qt
QThread A QThread object manages one thread of control within the program. QThreads begin executing in run(). By default, run() starts the event loop
JSON With Qt
QJsonDocumentThe QJsonDocument class provides a way to read and write JSON documents.isArray,isObject,isNull,isEmpty to check the main content of documentobject(),array() to get main
Multithreading
Atomic Data Types C++ has a set of simple atomic data types. These are booleans, characters, numbers and pointers in many variants. They
Qt Internationalization
Most real projects have a target audience in multiple countries. The most notable difference between them is the spoken language, but there are other
String handling
Applications with a graphical user interface (and games surely fall into this category) are able to interact with users by displaying text and by
Chrono in C++
Chrono library is used to deal with date and time. This library was designed to deal with the fact that timers and
Permutation And Numeric Algorithms
Permutations std::prev_permutation and std::next_permutation return the previous smaller or next bigger permutation of the newly ordered range. If a smaller or bigger permutation is not
binary heap
A binary heap is a heap data structure that takes the form of a binary tree. Binary heaps are a common way of implementing priority queues.[1]:162–163 The binary heap was
Sort, Binary Search, Merge Algorithms
Sort And Partial Sort You can sort a range with std::sort or std::stable_sort or sort until a position with std::partial_sort. In addition std::partial_sort_copy copies the partially sorted range. With std::nth_element you