Use php and Imagick to achieve the mask effect of images

Use php and Imagick to achieve the mask effect of images

In web development, it is often necessary to process images, one of which is the mask effect of images. The mask effect can add a layer of transparent mask to the picture, and achieve different effects by changing the transparency and color of the mask. In this article, we will use php and Imagick library to achieve the mask effect of images.

First, we need to ensure that the Imagick extension library has been installed on the server. You can check whether it is installed by running php -m | grep imagick in the command line.

Next, we need to create a simple HTML form for users to upload images. In this example, we assume that the form's id is upload-form, the file field's id is image-file, and the form's action points to our php script.

<form id="upload-form" action="process.php" method="post" enctype="multipart/form-data">
  <input type="file" id="image-file" name="image">
  <input type="submit" value="上传">
</form>

Then, create a php script named process.php to process the uploaded image and achieve the mask effect.

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_FILES['image']['tmp_name'])) {
  $imagePath = $_FILES['image']['tmp_name'];
  
  $maskPath = 'mask.png'; // 蒙版图片的路径
  $outputPath = 'output.png'; // 输出图片的路径
  
  // 创建Imagick对象用于处理图片
  $image = new Imagick($imagePath);
  
  // 创建蒙版图片的Imagick对象
  $mask = new Imagick($maskPath);
  
  // 将蒙版图片应用到原始图片
  $image->compositeImage($mask, Imagick::COMPOSITE_DSTIN, 0, 0);
  
  // 输出图片
  $image->writeImage($outputPath);
  
  // 显示图片
  echo '<img  src="/static/imghwm/default1.png"  data-src="'.$outputPath.'"  class="lazy".$outputPath.'" alt="Use php and Imagick to achieve the mask effect of images" >';
} else {
  echo '没有选择上传的图片';
}
?>

In the above code, first determine whether an image has been uploaded, and obtain the temporary path of the uploaded image through $_FILES['image']['tmp_name']. Then, we specified the path of the mask image and the path of the output image, and created two Imagick objects: $image is used to process the original image, $mask is used to process the mask version picture.

Next, we call the compositeImage() function to apply the mask image to the original image. Imagick::COMPOSITE_DSTINThe parameter indicates that the original image is used as the target image and the mask image is applied to it.

Finally, we use the writeImage() function to save the processed image to the output path and output the image on the page.

Finally, we open the php script containing the above code in the browser, click the upload button to select an image to upload. The script processes the image and displays the output on the page.

It should be noted that we need to place the mask image mask.png in the same directory as process.php and make sure the image exists.

Through the above steps, we successfully used php and Imagick to achieve the mask effect of the image. You can adjust the mask image and processing methods according to your needs to achieve different effects. Hope this article is helpful to you!

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