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
Imagick::floodFillPaintImage
(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::floodFillPaintImage — Changes the color value of any pixel that matches target
说明
public Imagick::floodFillPaintImage
( mixed
$fill
, float $fuzz
, mixed $target
, int $x
, int $y
, bool $invert
, int $channel = Imagick::CHANNEL_DEFAULT
) : boolChanges the color value of any pixel that matches target and is an immediate neighbor. This method is a replacement for deprecated Imagick::paintFloodFillImage(). 此方法在Imagick基于ImageMagick 6.3.8以上版本编译时可用。
参数
-
fill -
ImagickPixel object or a string containing the fill color
-
fuzz -
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.
-
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
truepaints any pixel that does not match the target color. -
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省为
Imagick::CHANNEL_DEFAULT. 参考此 通道常数列表
返回值
成功时返回 true。
范例
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");
?>
以上例程的输出类似于：
User Contributed Notes
Anonymous
29-Sep-2018 03:05