The ImagickKernel::getMatrix() function is an inbuilt function in PHP which is used to get the 2D matrix of values used in a kernel. The elements are either float or ‘false’ if element should be skipped.
Syntax:
array ImagickKernel::getMatrix( void )
Parameters:This function doesn’t accepts any parameter.
Return Value: This function returns an array value containing the matrix.
Below programs illustrate the ImagickKernel::getMatrix() function in PHP:
Program 1: This program uses getMatrix() function to get the matrix from user-defined matrix.
<?php // Create a new imagick object $imagick = new Imagick( $matrix = [ [-1, 0, 0], [4, -1, 6], [7, 8, 6] ]; // Create a kernel from matrix $kernel = ImagickKernel::fromMatrix($matrix); // Get the matrix $matrix = $kernel->getMatrix(); print("<pre>".print_r($matrix, true)."</pre>"); ?> |
Output:
Array
(
[0] => Array
(
[0] => -1
[1] => 0
[2] => 0
)
[1] => Array
(
[0] => 4
[1] => -1
[2] => 6
)
[2] => Array
(
[0] => 7
[1] => 8
[2] => 6
)
)
Program 2 (Get matrix from built-in matrix):
<?php // Create a new imagick object $imagick = new Imagick( // Create a kernel from built-in matrix $kernel = ImagickKernel::fromBuiltIn(Imagick::KERNEL_DISK, "2"); // Get the matrix $matrix = $kernel->getMatrix(); foreach ($matrix as $row) { foreach ($row as $cell) { if ($cell === false) { $output .= 0; } else { $output .= $cell; } } $output .= "<br>"; } echo $output; ?> |
Output:
00100 01110 11111 01110 00100
Reference: https://www.php.net/manual/en/imagickkernel.getmatrix.php
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