Example

function deskewImage($threshold)
{
    $imagick = new \Imagick(realpath("images/NYTimes-Page1-11-11-1918.jpg"));
    $deskewImagick = clone $imagick;
    
    //This is the only thing required for deskewing.
    $deskewImagick->deskewImage($threshold);

    //The rest of this example is to make the result obvious - because
    //otherwise the result is not obvious.
    $trim = 9;

//    $deskewImagick->cropImage($deskewImagick->getImageWidth() - $trim, $deskewImagick->getImageHeight(), $trim, 0);
//    $imagick->cropImage($imagick->getImageWidth() - $trim, $imagick->getImageHeight(), $trim, 0);
//    $deskewImagick->resizeimage($deskewImagick->getImageWidth() / 2, $deskewImagick->getImageHeight() / 2, \Imagick::FILTER_LANCZOS, 1);
//    $imagick->resizeimage($imagick->getImageWidth() / 2, $imagick->getImageHeight() / 2, \Imagick::FILTER_LANCZOS, 1);
//    $newCanvas = new \Imagick();
//    $newCanvas->newimage($imagick->getImageWidth() + $deskewImagick->getImageWidth() + 20, $imagick->getImageHeight(), 'red', 'jpg');
//    $newCanvas->compositeimage($imagick, \Imagick::COMPOSITE_COPY, 5, 0);
//    $newCanvas->compositeimage($deskewImagick, \Imagick::COMPOSITE_COPY, $imagick->getImageWidth() + 10, 0);

    header("Content-Type: image/jpeg");
    echo $deskewImagick->getImageBlob();
}