Detect EXIF Orientation and Rotate Image using ImageMagick

Question

Canon DSLRs appear to save photos in landscape orientation and uses exif::orientation to do the rotation.

Question: How can imagemagick be used to re-save the image into the intended orientation using the exif orientation data such that it no longer requires the exif data to display in the correct orientation?

php.net/manual/en/function.exif-read-data.php Extract the rotation parameter, test it, rotate image if need be. — Marc B
– Marc B, Commented Oct 18, 2013 at 17:59

masterxilo · Accepted Answer · 2019-01-25 11:50:29Z

188

Use the auto-orient option of ImageMagick's convert to do this.

convert your-image.jpg -auto-orient output.jpg

Or use mogrifyto do it in place

mogrify -auto-orient your-image.jpg

edited Jan 25, 2019 at 11:50

masterxilo

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answered Oct 20, 2013 at 8:17

dlemstra

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5 Comments

zanedp Over a year ago

Don't forget you can use mogrify instead of convert if you want to replace the existing file (in-place), which is useful when you want to do a directory full.

xarlymg89 Over a year ago

Doesn't seem to work in all cases. I have at least a case that GIMP asks me if I want to fix the rotation, but convert just leaves the image as it is (leaving the real upper part of the picture in the right part).

MXDVL Over a year ago

If you’re into libvps: vips autorot your-image.jpg output.jpg See function lists: libvips.github.io/libvips/API/current/…

Dev Null Over a year ago

convert and mogrify can (and do) reduce your file size, and therefore your resolution.

pacoverflow Over a year ago

Note that this will not update the ExifImageHeight/ExifImageWidth or rotate the internal thumbnail.

Tilo · Accepted Answer · 2020-08-30 16:03:31Z

58

The PHP Imagick way would be to test the image orientation and rotate/flip the image accordingly:

function autorotate(Imagick $image)
{
    switch ($image->getImageOrientation()) {
    case Imagick::ORIENTATION_TOPLEFT:
        break;
    case Imagick::ORIENTATION_TOPRIGHT:
        $image->flopImage();
        break;
    case Imagick::ORIENTATION_BOTTOMRIGHT:
        $image->rotateImage("#000", 180);
        break;
    case Imagick::ORIENTATION_BOTTOMLEFT:
        $image->flopImage();
        $image->rotateImage("#000", 180);
        break;
    case Imagick::ORIENTATION_LEFTTOP:
        $image->flopImage();
        $image->rotateImage("#000", -90);
        break;
    case Imagick::ORIENTATION_RIGHTTOP:
        $image->rotateImage("#000", 90);
        break;
    case Imagick::ORIENTATION_RIGHTBOTTOM:
        $image->flopImage();
        $image->rotateImage("#000", 90);
        break;
    case Imagick::ORIENTATION_LEFTBOTTOM:
        $image->rotateImage("#000", -90);
        break;
    default: // Invalid orientation
        break;
    }
    $image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
}

The function might be used like this:

$img = new Imagick('/path/to/file');
autorotate($img);
$img->stripImage(); // if you want to get rid of all EXIF data
$img->writeImage();

edited Aug 30, 2020 at 16:03

Tilo

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answered Aug 11, 2015 at 14:00

tarleb

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3 Comments

Jack Franzen Over a year ago

This solution works! I've only tried 1 image and there are of course 8, but I'll let you know how it goes. For me it was rotateImage, ->rotate just breaks

tarleb Over a year ago

Thanks, fixed the rotateImage stuff. If you want to test all orientations: There is a neat github repo which has an image for each exif value.

Alvin Over a year ago

thanks! worked in c#. i just needed a little conversion.

Dev Null · Accepted Answer · 2023-04-11 05:22:54Z

4

mogrify and convert both will lossy resize the image when correcting the orientation.

Use exiftran instead for lossless rotation.

On nice feature of exiftran is it's inplace flag (-i) allows you to process an entire directory at once, combined with the "auto" -a flag, like this:

exiftran -ai *.jpg

answered Apr 11, 2023 at 5:22

Dev Null

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2 Comments

glen Over a year ago

exiftran changed image dimensions 48x100 -> 50x100 on this input file: - mcc.id.au/2020/image-orientation/arrow-with-orientation.jpg

Dev Null Over a year ago

The image you provided is 100x50, and when I ran exiftran -ai arrow-with-orientation.jpg, it switched the orientation and dimensions were 50x100

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