Imagick::optimizeImageLayers

(PECL imagick 2, PECL imagick 3)

Imagick::optimizeImageLayers — Removes repeated portions of images to optimize

Description

public Imagick::optimizeImageLayers(): bool

Compares each image the GIF disposed forms of the previous image in the sequence. From this it attempts to select the smallest cropped image to replace each frame, while preserving the results of the animation. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

Parameters

This function has no parameters.

Return Values

Returns true on success.

Errors/Exceptions

Throws ImagickException on error.

Examples

Example #1 Using Imagick::optimizeImageLayers()

Reading, optimizing and writing a GIF image

<?php
/* create new imagick object */
$im = new Imagick("test.gif");

/* optimize the image layers */
$im->optimizeImageLayers();

/* write the image back */
$im->writeImages("test_optimized.gif", true);
?>

User Contributed Notes 1 note

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-1

f21 dot groups at gmail dot com ¶

11 years ago


In imagick 3.x (have not checked 2.x), this returns an imagemagick object and not a boolean.

<?php

$image = new Imagick('myanimation.gif');

$image = $image->optimizeImageLayers(); //Does not return a boolean!

$image->writeImage('optimized.gif');

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