How to stop PHP iMagick auto-rotating images based on EXIF ‘orientation’ data

by

“However – iMagick, when __construct’ed with this image, automatically rotates it an additional 90 degrees CCW as per [Orientation] => 6 (I think!).”

The problem is actually the opposite of that. Imagick doesn’t auto rotate the image. You’re only seeing it correctly in other software / your web browser because those programs do auto rotate it based on the EXIF info. Certain operations in Imagick will cause you to lose that correct EXIF info (copying the image, thumbnailImage(), stripImage(), and other manipulations). So what you need to do in that case is actually physically rotate the image.

The answer from ajmicek is good, but it could be improved a bit by using Imagick’s own built in functions rather than the PHP EXIF functions. Also that snippet seems to have been a part of a class, so it can’t be used as a separate function as-is. It’s also a good idea to set the correct EXIF orientation with setImageOrientation() after you rotate it. 

// Note: $image is an Imagick object, not a filename! See example use below.
function autoRotateImage($image) {
    $orientation = $image->getImageOrientation();

    switch($orientation) {
        case imagick::ORIENTATION_BOTTOMRIGHT: 
            $image->rotateimage("#000", 180); // rotate 180 degrees
            break;

        case imagick::ORIENTATION_RIGHTTOP:
            $image->rotateimage("#000", 90); // rotate 90 degrees CW
            break;

        case imagick::ORIENTATION_LEFTBOTTOM: 
            $image->rotateimage("#000", -90); // rotate 90 degrees CCW
            break;
    }

    // Now that it's auto-rotated, make sure the EXIF data is correct in case the EXIF gets saved with the image!
    $image->setImageOrientation(imagick::ORIENTATION_TOPLEFT);
}

Example use:

$image = new Imagick('my-image-file.jpg');
autoRotateImage($image);
// - Do other stuff to the image here -
$image->writeImage('result-image.jpg');

More Related Contents:

  1. Convert JPG/GIF image to PNG in PHP?
  2. How to install Imagick/imagemagick PHP extension on windows 7
  3. Echo in an image
  4. Saving image from PHP URL
  5. Can I store images in MySQL [duplicate]
  6. How do I convert a PDF document to a preview image in PHP?
  7. Full Secure Image Upload Script
  8. I need my PHP page to show my BLOB image from mysql database
  9. Merging two images with PHP
  10. php: recreate and display an image from binary data
  11. PHP check if file is an image [duplicate]
  12. Resize animated GIF file without destroying animation
  13. PHP Data-URI to file
  14. Can I embed a .png image into an HTML page?
  15. How to embed images in html email
  16. Install Imagick for PHP and Apache on Windows
  17. Send email with PHPMailer – embed image in body
  18. How to reduce the image size without losing quality in PHP [closed]
  19. PHP – get base64 img string decode and save as jpg (resulting empty image )
  20. writing exif data in php
  21. What is the best practice to export canvas with high quality images?
  22. Loop code for each file in a directory [duplicate]
  23. How to display an BLOB image stored in MySql database?
  24. Detect EXIF Orientation and Rotate Image using ImageMagick
  25. Scale Image Using PHP and Maintaining Aspect Ratio
  26. php resize image on upload
  27. How do you convert an image to black and white in PHP
  28. Working with GD ( imagettftext() ) and UTF-8 characters
  29. PHP Validating the File Upload [duplicate]
  30. when to use index.php instead of index.html

Leave a Comment