2015 Northeast PHP Conference

Imagick::deskewImage

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Imagick::deskewImageRemoves skew from the image

Descrierea

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. Această metodă este disponibilă dacă Imagick a fost compilat cu ImageMagick de versiunea 6.4.5 sau ulterior.

Parametri

threshold

Deskew threshold

Valorile întoarse

Exemple

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(), $trim0);
    
$imagick->cropImage($imagick->getImageWidth() - $trim$imagick->getImageHeight(), $trim0);
    
$deskewImagick->resizeimage($deskewImagick->getImageWidth() / 2$deskewImagick->getImageHeight() / 2, \Imagick::FILTER_LANCZOS1);
    
$imagick->resizeimage($imagick->getImageWidth() / 2$imagick->getImageHeight() / 2, \Imagick::FILTER_LANCZOS1);
    
$newCanvas = new \Imagick();
    
$newCanvas->newimage($imagick->getImageWidth() + $deskewImagick->getImageWidth() + 20$imagick->getImageHeight(), 'red''jpg');
    
$newCanvas->compositeimage($imagick, \Imagick::COMPOSITE_COPY50);
    
$newCanvas->compositeimage($deskewImagick, \Imagick::COMPOSITE_COPY$imagick->getImageWidth() + 100);

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

?>

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