[Data processing] python Matplotlib partially enlarges the figure; marks the local enlarged subfigure of interest

Foreword In data visualization, it is often necessary to partially enlarge the data in a certain interval to obtain a higher contrast visualization effect. The following uses the Matplotlib library of the Python language to implement a simple partial magnification effect. Dependent libraries matplotlib: plotting library numpy: an extended library that supports a large number […]

Call opencv library programming to display pictures and student ID names under Ubuntu

Article directory 1. Principle of Chinese character dot matrix font library (1), Chinese character encoding 1. Location code 2. Internal code (2) Dot matrix font structure 1. Bitmap font storage 2. 16*16 dot matrix font library 3. 1414 and 1212 dot matrix fonts (3). Acquisition of Chinese character lattice 1. Use location code to obtain […]

Call opencv library programming under Ubuntu to display a picture and display characters

? 1. Internal code, location code encoding rules and glyph data storage format of Chinese characters The in-machine code, location code encoding rules and glyph data storage format of Chinese characters are concepts related to Chinese character information processing. Here is a brief description: 1. Internal code: Internal code is the binary encoding used internally […]

A “flyweight” C language coroutine library

Coroutine, as its name implies, is “co-operative routines”. Unlike threads with operating system concepts, coroutines are programming techniques that can achieve logical multitasking in user space by using the syntax and semantics of programming languages. In fact, the concept of coroutine is earlier than thread. According to Knuth, “Subroutine is a special case of coroutine”. […]

JavaScript Library: jQuery, Simplified Programming

jQueryIntroduction Official website: https://jquery.com jQuery is a JavaScript Library . greatly simplified JavaScript Programming, for example JS Dozens of lines of native code to achieve the function able, jQuery It may be implemented in one or two lines, so it is widely used by front-end programmers. (Now in a relatively marginal state) Since its development, […]

[vs+qt] Use the VTK library to read the STL model and display the STL model on the QT interface

Article directory summary Show results Implementation steps Code summary summary Summary To use the complete interface, click the button to select the file, read the stl three-dimensional model, and display the model on the qvtkWidget control. Effect display 1.Select the file address 2. Interface window display Implementation steps 1. Click the Open File button, select […]

Summary of all aspects of getting started with SpringCloud Alibaba components (Part 1): registration center-nacos, load balancing-ribbon, remote calling-feign

Article directory Nacos Ribbon Feign FeignExpansion Nacos Concept: Nacos is a new open source project launched by Alibaba. It is a dynamic service discovery, configuration management and service management platform that makes it easier to build cloud native applications. Nacos is committed to helping users discover, configure and manage microservices. It provides a simple and […]

Solution to “Python3.12pip network installation library file error, ssl module is unavailable”

Solution to “Python3.12pip network installation library file error, ssl module is unavailable” 1. Install the new version of openssl3.1.4 2. Install Python3.12.0 The Python version needs to match the openssl version. In versions after Python 3.7, the dependent openssl must be a version after 1.1.1 or 1.0.2, and the openssl1.0.2k installed in CentOS7 cannot meet […]