How to use PHP and Qiniu cloud storage interface to implement special filters and style migration of pictures

How to use PHP and Qiniu cloud storage interface to implement special filters and style migration of pictures

Abstract: This article introduces how to use PHP and Qiniu cloud storage interface to implement special filters and styles of pictures Migration method. By using the image processing interface of Qiniu Cloud Storage, we can process various filter effects on images and transfer the style of one image to another image. In order to implement these functions, we will use Qiniu Cloud Storage’s PHP SDK.

Keywords: PHP, Qiniu Cloud Storage, image processing, filters, style migration, SDK

1. Introduction
   With the development of the Internet, image processing technology has also changed becomes more and more important. People have increasingly higher requirements for the effects of pictures, for example, applying special filters to pictures to increase artistic effects, or transferring the style of one picture to another. In this article, we will introduce how to use PHP and Qiniu cloud storage interface to implement these functions.
2. Preparation
   Before we start, we need to do some preparations.

First, we need to create an account on Qiniu Cloud Storage and obtain the API key. Then, we need to install the PHP SDK of Qiniu Cloud Storage, which can be installed through Composer. Open a command line terminal, enter the project directory, and execute the following command:

composer require qiniu/php-sdk

After the installation is complete, we can start writing code.

3. Implementing image filter effects
   First, we will write code to implement image filter effect processing. Using the image processing interface of Qiniu Cloud Storage, you can achieve a variety of filter effects, such as sepia filters, black and white filters, etc. The following is a sample code:

<?php
require 'vendor/autoload.php'; // 引入七牛云存储的PHP SDK

use QiniuAuth; // 引入Auth类
use QiniuStorageBucketManager; // 引入BucketManager类

$accessKey = 'YOUR_ACCESS_KEY';
$secretKey = 'YOUR_SECRET_KEY';
$bucket = 'YOUR_BUCKET';

// 实例化Auth类
$auth = new Auth($accessKey, $secretKey);

// 实例化BucketManager类
$bucketManager = new BucketManager($auth);

// 图片链接
$url = 'http://example.com/image.jpg';

// 滤镜效果参数
$filter = 'filtername/arg1/arg2';

// 生成新的图片链接
$newUrl = $bucketManager->buildUrl($url, $filter);

// 输出新的图片链接
echo $newUrl;
?>

In the code, we first introduced the PHP SDK of Qiniu Cloud Storage and used the Require statement to introduce it as a dependent library. Then, we introduced the Auth class and BucketManager class using the Use statement. Next, we need to replace the access key and bucket name with our own information.

The core part of the code is the buildUrl() method, which accepts two parameters: image link and filter effect parameters. We can set different values ​​for the $filter variable to achieve different filter effects. After calling the buildUrl() method, we can get the processed image link.

You can change the code according to your own needs and add other filter effect parameters. After executing the code, a new image link will be output, that is, the processed image.

4. Implement style migration
   Next, we will implement the function of migrating the style of one picture to another picture. This is a relatively complex image processing task, but the image processing interface of Qiniu Cloud Storage provides corresponding functions. The following is a sample code:

<?php
require 'vendor/autoload.php'; // 引入七牛云存储的PHP SDK

use QiniuAuth; // 引入Auth类
use QiniuStorageBucketManager; // 引入BucketManager类

$accessKey = 'YOUR_ACCESS_KEY';
$secretKey = 'YOUR_SECRET_KEY';
$bucket = 'YOUR_BUCKET';

// 实例化Auth类
$auth = new Auth($accessKey, $secretKey);

// 实例化BucketManager类
$bucketManager = new BucketManager($auth);

// 原始图片链接
$fromUrl = 'http://example.com/image1.jpg';

// 目标图片链接
$toUrl = 'http://example.com/image2.jpg';

// 风格迁移参数
$style = 'yourStyle';

// 生成新的图片链接
$newUrl = $bucketManager->buildUrl($fromUrl, 'style/' . $style . '|saveas/' . Qiniuase64_urlSafeEncode($bucket . ':' . $toUrl));

// 输出新的图片链接
echo $newUrl;
?>

The code is similar to the previous filter effect processing example, except that the parameters for saving the target image are added to the buildUrl() method. We pass the link of the original image and the link of the target image to the buildUrl() method, and set the corresponding style migration parameters.

According to your own needs, you can change the variable values ​​in the code and add other style migration parameters. After executing the code, the processed image link will be output, that is, the image after style migration.

5. Summary
   Through the introduction of this article, we have learned how to use PHP and Qiniu cloud storage interface to implement special filters and style migration of pictures. Using the image processing interface of Qiniu Cloud Storage, we can easily achieve various processing effects on images, thereby increasing the artistic effect of the images. By calling the corresponding methods and setting parameters according to our own needs, we can implement special filters and style migration of pictures to make the pictures more vivid and interesting.

Reference materials:

• Qiniu Cloud Storage Documentation: https://developer.qiniu.com/dora

The above code examples It is implemented through the PHP SDK of Qiniu Cloud Storage. Qiniu Cloud Storage has powerful image processing functions. By calling the corresponding methods and setting parameters, we can achieve various filter effects and style migration. Readers can modify and expand according to their own needs to achieve more creative and unique image processing effects.

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