


jQuery, PHP and API implement facial recognition function_PHP tutorial
Introduction: Facial recognition is a computer technology that uses image algorithms to determine the position and size of faces. It identifies facial features and ignores other image noise, such as buildings, trees and bodies. Most photo albums on social networking platforms now have this function. After you upload a photo, it automatically runs an algorithm and identifies your friends in the photo. This article introduces you to different plug-ins and libraries to achieve this function.
jQuery facial recognition
jQuery plugin identifies faces on photos and gives their coordinates and sizes. This plug-in was developed by Liuliu (transliteration: Liuliu) in combination with HTML5 canvas, so it can only run on clients that support HTML5. If you are interested, you can see this sample (see the picture below, but you have to circumvent the firewall). The entire algorithm code can be downloaded from git hub.
PHP facial recognition extension
Provides OpenCV (Open Source Computer Vision) implemented in PHP. It contains two functions face_count () and face_detect (). The first one gives the number of faces identified on an image. The second one gives a sequence of their coordinates and the total number. You can find the installer and manual, as well as demos, on XARG’s page.
Face Recognition API
This API was developed by a Romanian. This is still very convenient to use. Your program sends it the API credentials and the URL of the image to analyze, and it returns you an XML data containing all the facial data found on the image. This package is particularly convenient because it can analyze URLs directly instead of image data, so you can grab the link directly on the server and analyze it.
Ruby
This is similar to the program using OpenCV's Ruby package and PHP. You can download the program on the Ruby page.
OpenCVDotNet
This is a program management developed for the .NET framework, through which OpenCV functions can be called directly from C#. It includes a DLL (written in C++) that wraps OpenCV in a .NET class so that it can be used by VB.NET, C++ and C#.

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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