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Using the imagick driver to crop and resize a png will create artifacts in the output #1426

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mvveggel opened this issue Jan 30, 2025 · 1 comment · May be fixed by #1428
Open

Using the imagick driver to crop and resize a png will create artifacts in the output #1426

mvveggel opened this issue Jan 30, 2025 · 1 comment · May be fixed by #1428
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investigation-needed patch-release

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@mvveggel
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Describe the bug

When using the Imagick driver to crop and resize an image the output contains artifacts, most noticeable in transparent areas (the transparent area is mostly black with random noise).
This does not happen in version <= 3.10.2
When either crop or resize is skipped the artifacts do not appear

Code Example

$imageManager = new \Intervention\Image\ImageManager(new \Intervention\Image\Drivers\Imagick\Driver());
$image = $imageManager->read('Sample.png');
$image->crop(2200, 1500);
$image->resize(220, 150);
$image->encodeByMediaType(null, 90);
$image->save('SampleCropped.png');

Expected behavior

The image is cropped and resized without adding artifacts

Images

Image
Image

Environment:

  • PHP Version: 8.3
  • OS: Linux (Ubuntu 22)
  • Intervention Image Version: 3.11.0
  • GD or Imagick: Imagick 6.9.11-60
@olivervogel
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olivervogel commented Jan 30, 2025 •
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Thanks for reporting. I will look into this.

Although I can confirm the error, there is a workaround here. I believe the same result can be achieved with the following call.

$imageManager = new \Intervention\Image\ImageManager(new \Intervention\Image\Drivers\Imagick\Driver());
$image = $imageManager->read('Sample.png');
$image->cover(220, 150);
$image->save('SampleCropped.png');

olivervogel added a commit that referenced this issue Jan 31, 2025
@olivervogel
Fix bug in imagick driver's CropModifier
107e623 
See: #1426
@olivervogel olivervogel linked a pull request Jan 31, 2025 that will close this issue
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Fix/crop resize png Intervention/image
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@olivervogel @mvveggel