imageconvolution
PHP 5 >= 5.1.0, PHP 7, PHP 8
imageconvolution - Apply a 3x3 convolution matrix, using coefficient and offset
Manual
imageconvolution(
GdImage$image,
array$matrix,
float$divisor,
float$offset ): bool
Applies a convolution matrix on the image, using the given coefficient and offset.
Parameters
- image
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor.
- matrix
-
A 3x3 matrix: an array of three arrays of three floats.
- divisor
-
The divisor of the result of the convolution, used for normalization.
- offset
-
Color offset.
Return Values
Returns true on success or false on failure.
Changelog
| Version | Description |
| 8.0.0 | image expects a GdImage instance now; previously, a resource was expected. |