Imagick::setImageType

(PECL imagick 2.0.0)

Imagick::setImageTypeSets the image type

Description

bool Imagick::setImageType ( int $image_type )

Sets the image type.

Parameters

image_type

Return Values

Returns TRUE on success.

Коментарии

This function can be used to desaturate an image, i.e. to convert a coloured image into a greyscale:

<?php

$im 
= new Imagick ("image.jpg");
$im->setImageType (2);
//is now in 256 shades of grey

?>
2011-10-19 16:37:24
http://php5.kiev.ua/manual/ru/imagick.setimagetype.html
The cleaner way to set the type to grayscale is to use the Imagick class constant.

$oBw = new \Imagick($sSourceImage);
$oBw->setImageType(\Imagick::IMGTYPE_GRAYSCALE);

I've found this to be a rather harsh 'convert to grayscale' approach. Fred's color2gray script works much better, but it's written in Bash. Time to get it ported over lol

http://www.fmwconcepts.com/imagemagick/color2gray/index.php
2014-10-04 21:29:55
http://php5.kiev.ua/manual/ru/imagick.setimagetype.html
Автор:
The different image types that can be specified are (from the Imagick::getImageType doc page):

    Imagick::IMGTYPE_UNDEFINED
    Imagick::IMGTYPE_BILEVEL
    Imagick::IMGTYPE_GRAYSCALE
    Imagick::IMGTYPE_GRAYSCALEMATTE
    Imagick::IMGTYPE_PALETTE
    Imagick::IMGTYPE_PALETTEMATTE
    Imagick::IMGTYPE_TRUECOLOR
    Imagick::IMGTYPE_TRUECOLORMATTE
    Imagick::IMGTYPE_COLORSEPARATION
    Imagick::IMGTYPE_COLORSEPARATIONMATTE
    Imagick::IMGTYPE_OPTIMIZE

The MATTE variants are equivalent to GrayscaleAlpha, etc. in the ImageMagick command line. If you're making something grayscale, I would recommend using IMGTYPE_GRAYSCALEMATTE.

<?php

$im
->setImageType(Imagick::IMGTYPE_GRAYSCALEMATTE);

?>
2020-03-24 14:55:24
http://php5.kiev.ua/manual/ru/imagick.setimagetype.html

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