The ImagickKernel::fromMatrix() function is an inbuilt function in PHP which is used to create a kernel from an 2d matrix of values. The value of 2d matrix is either float if element is used otherwise false if element is skipped.
Syntax:
ImagickKernel ImagickKernel::fromMatrix( array $matrix, array $origin )
Parameters: This function accepts two parameters as mentioned above and described below:
- $matrix: It specifies the matrix of values that define the kernel. Values can be float or false.
- $origin (optional): It specifies the element of kernel that should be used as the origin pixel. This is only required in case of non-square matrix.
Return Value: This function returns a new ImagickKernel object on success.
Below programs illustrate the ImagickKernel::fromMatrix() function in PHP:
Program 1:
<?php // Create a new imagick object $imagick = new Imagick( $matrix = [ [-1.5, -1, -0.2], [0, 1, 1], [0, 0.5, 1], ]; // Create a kernel from matrix $kernel = ImagickKernel::fromMatrix($matrix); // Add the filter $imagick->filter($kernel); // Show the output $imagick->setImageFormat('png'); header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> |
Output:
Program 2:
<?php // Create a new imagick object $imagick = new Imagick( $matrix = [ [1, 2, -3], [4, 5, 6], [7, 8, 9] ]; // 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] => 2
[2] => -3
)
[1] => Array
(
[0] => 4
[1] => 5
[2] => 6
)
[2] => Array
(
[0] => 7
[1] => 8
[2] => 9
)
)
Reference: https://www.php.net/manual/en/imagickkernel.frommatrix.php
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