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Imagick::deskewImage

(PECL imagick 2 >= 2.3.0, PECL imagick 3 >= 3.3.0)

Imagick::deskewImageRemoves skew from the image

Beschreibung

public Imagick::deskewImage(float $threshold): bool

This method can be used to remove skew from for example scanned images where the paper was not properly placed on the scanning surface. Diese Funktion ist verfügbar, wenn Imagick gegen die ImageMagick-Version 6.4.5 oder höher kompiliert wurde.

Parameter-Liste

threshold

Deskew threshold

Rückgabewerte

Beispiele

Beispiel #1 Imagick::deskewImage()

<?php
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/jpg");
echo
$newCanvas->getImageBlob();
}

?>

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