Imagick::whiteThresholdImage

(PECL imagick 2.0.0)

Imagick::whiteThresholdImage — Force all pixels above the threshold into white

Description

bool Imagick::whiteThresholdImage ( mixed $threshold )

Is like Imagick::ThresholdImage() but force all pixels above the threshold into white while leaving all pixels below the threshold unchanged.

Parameters

threshold

Return Values

Returns TRUE on success.

Changelog

Version	Description
2.1.0	Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object.

add a note User Contributed Notes Imagick::whiteThresholdImage - [1 notes]

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elmer at web-axis dot net ¶

4 years ago


Here's a example of this function:





<?php


  $img = new Imagick();


  $img->readImage($image_file_name);


  $img->whiteThresholdImage('grey');


  $img->writeImage($thumb_file_name);


  $img->clear();


  $img->destroy();


?>

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