Imagick::deskewImage
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Imagick::deskewImage — Removes skew from the image
Description
public bool Imagick::deskewImage ( float $threshold )This method can be used to remove skew from for example scanned images where the paper was not properly placed on the scanning surface. This method is available if Imagick has been compiled against ImageMagick version 6.4.5 or newer.
Parameters
threshold
Deskew threshold
Return Values
Examples
Example #1 Imagick::deskewImage()
<?php
function?deskewImage($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();
}
?>← Imagick::deleteImageProperty
Imagick::despeckleImage →
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