Get the index of the specified color or its closest possible alternative

설명

int imagecolorresolve ( resource $image , int $red , int $green , int $blue )

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.

인수

image: imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
red: Value of red component.
green: Value of green component.
blue: Value of blue component.

반환값

Returns a color index.

예제

Example #1 Using imagecoloresolve() to get colors from an image


<?php
// Load an image
$im = imagecreatefromgif('phplogo.gif');

// Get closest colors from the image
$colors = array();
$colors[] = imagecolorresolve($im, 255, 255, 255);
$colors[] = imagecolorresolve($im, 0, 0, 200);

// Output
print_r($colors);

imagedestroy($im);
?>

위 예제의 출력 예시:

Array
(
    [0] => 89
    [1] => 85
)

참고

imagecolorclosest() - Get the index of the closest color to the specified color