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Personal data, for learning purposes only Modification time - 21:11:31, February 19, 2022 Course of study: OpenCV4 image processing and video analysis practical tutorial Lecturer: Jia Zhigang 13 custom filtering opencv knowledge points: Convolute image with kernel - filter2DScaling takes absolute value and converts it to 8 bits - convertSc ...

1. PCB on Linux 2. Process State Transition 1.Tristate 2.Pentastate 3.ps command. //Static View Process ps aux(View all current processes) | ajx 4.top command //View process dynamically 5.kill command //Kill Process kill -9/SIGKILL pid Force Kill Process killall -name Process name Kill by process name 6. Process re ...

1. Introduction to Visual Studio Code VS Code is actually a powerful text editor, which can also realize the compilation function on the basis of installing plug-ins. Support Windows, OS X and Linux, with built-in JavaScript, TypeScript and node JS support, and has a rich plug-in ecosystem. You can install plug-ins to support C + +, C#, Python ...

The so-called resources are things borrowed from the system during the operation of the program. Once used, when you don't use them, you must return them. The most common resource of C + + is dynamic memory allocation, that is, the memory we dynamically allocate from the system with new or malloc. Of course, resources also include other resourc ...

Introduction and use of stack stack is a container adapter, which is specially used in the context of last in first out operation. Its deletion can only insert and extract elements from one end of the container.Stack is implemented as a container adapter. A container adapter encapsulates a specific class as its underlying container, and pr ...

*** Class definitions and class members Define a class: class Box { private: double length; // Length of a box double breadth; // Breadth of a box double height; // Height of a box public: double getArea(); }; The defined class has the following properties: class name, class members (including da ...

Smart pointer When using heap memory, when a piece of heap memory is no longer needed, this memory must be released in order to reallocate this memory. If a programmer accidentally makes an error when writing code for object reallocation, it will lead to serious problems, such as memory leakage, which will lead to program crash. In C ++ 11 ...

Problem surface There is a game in which a lattice of m rows and n columns is given on the plane. There are obstacles on some grids, and there may be English letters on grids without obstacles. Now it is required to establish a path on the empty grid, so that there is a letter at both ends of each path, and the letters at both ends are differe ...

C + + octet sharing - data structure II - hash table preface What is a hash table? The search Binary Tree finds the value by comparing it with the target value one by one from the root node, and then looking down until the target value is found or the root node is not found. The time complexity is O (log n). In the hash table, the value and ...

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=1176 Main idea of the title: At first, the gameboy is on coordinate 5. He can only move in 0-10 coordinates, and the gameboy at position I can only connect the pie at one position of (i-1),(i),(i+1) in the next second (there may be more than one pie falling at this time). Find out how many p ...