php 한글 메뉴얼 도움말 검색 사이트 Forces all pixels below the threshold into black [imagick.blackthresholdimage]

설명

bool Imagick::blackThresholdImage ( mixed $threshold )

Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

인수

threshold: The threshold below which everything turns black

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::blackThresholdImage()


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

?>