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 […]

AJAX dynamically obtains values from the database through manual splicing and dynamically splices the spliced JSON to the front-end page——AJAX

<!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <title>Title</title> </head> <body> <script type=”text/javascript”> window.onload = function () { document.getElementById(“show”).onclick = function () { var ajax = new XMLHttpRequest(); ajax.onreadystatechange = function () { if(ajax.readyState === 4) { if(ajax.status === 200) { var fromJava = ajax.responseText; var json = JSON.parse(fromJava); console.log(json); var html = “”; for (var […]

[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 […]

51 microcontroller + DS1302 design an electronic clock (LCD1602 displays time)

1. Preface An electronic clock is a device that can accurately display time. It is widely used in homes, offices and public places, providing people with convenient and accurate time information. This project designs an electronic clock based on 51 microcontroller, using DS1302 as the RTC clock chip, LCD1602 as the display screen, and connecting […]

Arduino + OLED screen display bitmap

original There are already many projects using Arduino to drive a 0.96-inch OLED screen to display various information. If we need to drive OLED to display images, logos, etc. whatever we want, here is a simple and general method. You need to use Image2Cp, a tool for converting images to CPP code. Component list Arduino×1 […]

ZooKeeper+Kafka+ELK+Filebeat cluster construction to realize large batch log collection and display

The general process: After collecting the logs of the nginx server (web-filebeat) through filebeat, store them in the cache server kafka, and then logstash to the kafka server to retrieve the corresponding logs. After processing, they are written to the elasticsearch server and displayed on kibana. 1. Cluster environment preparation 4c/8G/100G 10.10.200.33 Kafka + ZooKeeper […]

kafka practice-hot data display

1 Real-time streaming computing 1.1 Concept Streaming computing generally has high real-time requirements. At the same time, the target calculation is generally defined first, and then the calculation logic is applied to the data after the data arrives. At the same time, in order to improve calculation efficiency, incremental calculation is often used instead of […]

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. 14*14 and 12*12 dot matrix fonts (3). Acquisition of Chinese character lattice 1. Use location code to obtain […]