Imagick::floodFillPaintImage

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Imagick::floodFillPaintImage — Changes the color value of any pixel that matches target

설명

bool Imagick::floodFillPaintImage ( mixed $fill , float $fuzz , mixed $target , int $x , int $y , bool $invert [, int $channel = Imagick::CHANNEL_DEFAULT ] )

Changes the color value of any pixel that matches target and is an immediate neighbor. This method is a replacement for deprecated Imagick::paintFloodFillImage(). 이 메쏘드는 Imagick을 ImageMagick 6.3.8 이상으로 컴파일 했을 때만 사용할 수 있습니다.

인수

fill: ImagickPixel object or a string containing the fill color
fuzz: fuzz 양. 예를 들면, fuzz를 10으로 설정했을 때 붉은색의 농도를 100과 102로 설정한 것은 같은 색으로 취급합니다.
target: ImagickPixel object or a string containing the target color to paint
x: X start position of the floodfill
y: Y start position of the floodfill
invert: If TRUE paints any pixel that does not match the target color.
channel: 채널 모드에 유효한 채널 상수를 제공합니다. 둘 이상의 채널을 적용하려면, 비트 연산자를 이용해서 채널 상수를 조합하십시오. 기본값은 Imagick::CHANNEL_DEFAULT. 채널 상수 목록을 참고하십시오.

반환값

성공시에 TRUE를 반환합니다.

예제

Example #1 Imagick::floodfillPaintImage() example


<?php

/* Create new imagick object */
$im = new Imagick();

/* create red, green and blue images */
$im->newImage(100, 50, "red");
$im->newImage(100, 50, "green");
$im->newImage(100, 50, "blue");

/* Append the images into one */
$im->resetIterator();
$combined = $im->appendImages(true);

/* Save the intermediate image for comparison */
$combined->writeImage("floodfillpaint_intermediate.png");

/* The target pixel to paint */
$x = 1;
$y = 1;

/* Get the color we are painting */
$target = $combined->getImagePixelColor($x, $y);

/* Paints pixel in position 1,1 black and all neighboring 
   pixels that match the target color */
$combined->floodfillPaintImage("black", 1, $target, $x, $y, false);

/* Save the result */
$combined->writeImage("floodfillpaint_result.png");
?>

위 예제의 출력 예시:

Output of example : Imagick::floodfillPaintImage()

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User Contributed Notes 1 note

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Anonymous ¶

5 years ago


For fuzz, percentage or float values do not seem to work. The value is based on the intensity of the image colors. 

The documentation states: "The amount of fuzz. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color." 

For those of us who are not graphics geeks, your color intensity might be something like 65535. In which case, to get just 10% fuzz, you need to set it to 6550. 

You likely will not see any effect if you are using low numbers or floats, like 100, 20, or 0.8. 

For example: 
$im = new Imagick();
$transparentColor = new ImagickPixel('transparent');
$greenscreen = '#00FF08';    // Super bright green

$im->readImage("cartoon_dog.png");    // Cartoony dog with a black outline and a #00FF08 (super bright green) background. 

// Replace the green background with transparent.

// Leaves significant green lines around the outline of the dog, which is unacceptable.
$im->floodFillPaintImage($transparentColor, 30, $greenscreen, 0, 0, false, Imagick::CHANNEL_ALPHA);

// Works as intended - removes all of the green background. 
$im->floodFillPaintImage($transparentColor, 30000, $greenscreen, 0, 0, false, Imagick::CHANNEL_ALPHA);

Credit to the discussion here: 
https://php5.kiev.ua/php7/imagick.painttransparentimage.html

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