Imagick::whiteThresholdImage

(PECL imagick 2.0.0)

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

설명

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.

인수

threshold

반환값

성공시에 TRUE를 반환합니다.

변경점

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

예제

Example #1 Imagick::whiteThresholdImage()


<?php
function whiteThresholdImage($imagePath, $color) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->whiteThresholdImage($color);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

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User Contributed Notes 1 note

down

elmer at web-axis dot net ¶

16 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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