Imagick::morphology
Imagick::morphology
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Imagick::morphology — Description
Description
public void Imagick::morphology ( int $morphologyMethod , int $iterations , ImagickKernel $ImagickKernel [, string $CHANNEL ] )
Applies a user supplied kernel to the image according to the given morphology method.
Parameters
morphologyMethod
Which morphology method to use one of the \Imagick::MORPHOLOGY_* constants.
iterations
The number of iteration to apply the morphology function. A value of -1 means loop until no change found. How this is applied may depend on the morphology method. Typically this is a value of 1.
ImagickKernel CHANNEL
Return Values
Examples
Example #1 Convolve Imagick::morphology()
<?php
$imagick = $this->getCharacter(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_GAUSSIAN, "5,1"
$imagick->morphology(\Imagick::MORPHOLOGY_CONVOLVE, 2, $kernel
header("Content-Type: image/png"
echo $imagick->getImageBlob(
?>
Example #2 Correlate Imagick::morphology()
<?php
// Top-left pixel must be black
// Bottom right pixel must be white
// We don't care about the rest.
$imagick = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromMatrix(self::$correlateMatrix, [2, 2]
$imagick->morphology(\Imagick::MORPHOLOGY_CORRELATE, 1, $kernel
header("Content-Type: image/png"
echo $imagick->getImageBlob(
?>
Example #3 Erode Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_ERODE, 2, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #4 Erode Intensity Imagick::morphology()
<?php
$canvas = $this->getCharacter(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "1"
$canvas->morphology(\Imagick::MORPHOLOGY_ERODE_INTENSITY, 2, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #5 Dilate Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_DILATE, 4, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #6 Dilate intensity Imagick::morphology()
<?php
$canvas = $this->getCharacter(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "1"
$canvas->morphology(\Imagick::MORPHOLOGY_DILATE_INTENSITY, 4, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #7 Distance with Chebyshev kernel Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_CHEBYSHEV, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_DISTANCE, 3, $kernel
$canvas->autoLevelImage(
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #8 Distance with Manhattan kernel Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_MANHATTAN, "5"
$canvas->morphology(\Imagick::MORPHOLOGY_DISTANCE, 3, $kernel
$canvas->autoLevelImage(
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #9 Distance with ocatagonal kernel Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGONAL, "5"
$canvas->morphology(\Imagick::MORPHOLOGY_DISTANCE, 3, $kernel
$canvas->autoLevelImage(
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #10 Distance with Euclidean kernel Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_EUCLIDEAN, "4"
$canvas->morphology(\Imagick::MORPHOLOGY_DISTANCE, 3, $kernel
$canvas->autoLevelImage(
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #11 Edge Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_EDGE, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #12 Open Imagick::morphology()
<?php
// As a result you will see that 'Open' smoothed the outline, by rounding off any sharp points, and remove any parts that is smaller than the shape used. It will also disconnect or 'open' any thin bridges.
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "6"
$canvas->morphology(\Imagick::MORPHOLOGY_OPEN, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #13 Open intensity Imagick::morphology()
<?php
// As a result you will see that 'Open' smoothed the outline, by rounding off any sharp points, and remove any parts that is smaller than the shape used. It will also disconnect or 'open' any thin bridges.
$canvas = $this->getCharacter(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "6"
$canvas->morphology(\Imagick::MORPHOLOGY_OPEN_INTENSITY, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #14 Close Imagick::morphology()
<?php
//The basic use of the 'Close' method is to reduce or remove any 'holes' or 'gaps' about the size of the kernel 'Structure Element'. That is 'close' parts of the background that are about that size.
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "6"
$canvas->morphology(\Imagick::MORPHOLOGY_CLOSE, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #15 Close Intensity Imagick::morphology()
<?php
//The basic use of the 'Close' method is to reduce or remove any 'holes' or 'gaps' about the size of the kernel 'Structure Element'. That is 'close' parts of the background that are about that size.
$canvas = $this->getCharacter(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "6"
$canvas->morphology(\Imagick::MORPHOLOGY_CLOSE_INTENSITY, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #16 Smooth Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_SMOOTH, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #17 Edge in Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_EDGE_IN, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #18 Edge out Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_OCTAGON, "3"
$canvas->morphology(\Imagick::MORPHOLOGY_EDGE_OUT, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #19 The 'TopHat' method, or more specifically 'White Top Hat', returns the pixels that were removed by a Opening of the shape, that is the pixels that were removed to round off the points, and the connecting bridged between shapes. Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "5"
$canvas->morphology(\Imagick::MORPHOLOGY_TOP_HAT, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #20 The 'BottomHat' method, also known as 'Black TopHat' is the pixels that a Closing of the shape adds to the image. That is the the pixels that were used to fill in the 'holes', 'gaps', and 'bridges'. Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "5"
$canvas->morphology(\Imagick::MORPHOLOGY_BOTTOM_HAT, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #21 Hit and Miss Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
//This finds all the pixels with 3 pixels of the right edge
$matrix = [[1, false, false, 0]];
$kernel = \ImagickKernel::fromMatrix(
$matrix,
[0, 0]
$canvas->morphology(\Imagick::MORPHOLOGY_HIT_AND_MISS, 1, $kernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #22 Thinning Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$leftEdgeKernel = \ImagickKernel::fromMatrix([[0, 1]], [1, 0]
$rightEdgeKernel = \ImagickKernel::fromMatrix([[1, 0]], [0, 0]
$leftEdgeKernel->addKernel($rightEdgeKernel
$canvas->morphology(\Imagick::MORPHOLOGY_THINNING, 3, $leftEdgeKernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #23 Thicken Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$leftEdgeKernel = \ImagickKernel::fromMatrix([[0, 1]], [1, 0]
$rightEdgeKernel = \ImagickKernel::fromMatrix([[1, 0]], [0, 0]
$leftEdgeKernel->addKernel($rightEdgeKernel
$canvas->morphology(\Imagick::MORPHOLOGY_THICKEN, 3, $leftEdgeKernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #24 Thick to generate a convex hull Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$diamondKernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DIAMOND, "1"
$convexKernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_CONVEX_HULL, ""
// The thicken morphology doesn't handle small gaps. We close them
// with the close morphology.
$canvas->morphology(\Imagick::MORPHOLOGY_CLOSE, 1, $diamondKernel
$canvas->morphology(\Imagick::MORPHOLOGY_THICKEN, -1, $convexKernel
$canvas->morphology(\Imagick::MORPHOLOGY_CLOSE, 1, $diamondKernel
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #25 Iterative morphology Imagick::morphology()
<?php
$canvas = $this->getCharacterOutline(
$kernel = \ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DISK, "2"
$canvas->morphology(\Imagick::MORPHOLOGY_ITERATIVE, 3, $kernel
$canvas->autoLevelImage(
header("Content-Type: image/png"
echo $canvas->getImageBlob(
?>
Example #26 Helper functon to get an image silhouette Imagick::morphology()
<?php
private function getCharacterOutline() {
$imagick = new \Imagick(realpath("./images/character.png")
$character = new \Imagick(
$character->newPseudoImage(
$imagick->getImageWidth(),
$imagick->getImageHeight(),
"canvas:white"
$canvas = new \Imagick(
$canvas->newPseudoImage(
$imagick->getImageWidth(),
$imagick->getImageHeight(),
"canvas:black"
$character->compositeimage(
$imagick,
\Imagick::COMPOSITE_COPYOPACITY,
0, 0
$canvas->compositeimage(
$character,
\Imagick::COMPOSITE_ATOP,
0, 0
$canvas->setFormat('png'
return $canvas;
}
?>
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