Imagick::orderedPosterizeImage
(PECL imagick 2.2.2)
Imagick::orderedPosterizeImage — Performs an ordered dither
Description
bool Imagick::orderedPosterizeImage ( string $threshold_map [, int $channel = Imagick::CHANNEL_ALL ] )Performs an ordered dither based on a number of pre-defined dithering threshold maps, but over multiple intensity levels, which can be different for different channels, according to the input arguments. This method is available if Imagick has been compiled against ImageMagick version 6.3.1 or newer.
Parameters
threshold_map
A string containing the name of the threshold dither map to use
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Return Values
Returns TRUE on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::orderedPosterizeImage()
<?php
function?orderedPosterizeImage($imagePath,?$orderedPosterizeType)?{
????$imagick?=?new?\Imagick(realpath($imagePath));
????
??
????$imagick->orderedPosterizeImage($orderedPosterizeType);
????$imagick->setImageFormat('png');
????
????header("Content-Type:?image/png");
????echo?$imagick->getImageBlob();
}
//orderedPosterizeImage($imagePath,?'o4x4,3,3');
//orderedPosterizeImage($imagePath,?'o8x8,6,6');
orderedPosterizeImage($imagePath,?'h8x8a');
?>← Imagick::optimizeImageLayers
Imagick::paintFloodfillImage →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
