imageconvolution Apply a 3x3 convolution matrix, using coefficient and offset &reftitle.description; boolimageconvolution resourceimage arraymatrix floatdiv floatoffset Applies a convolution matrix on the image, using the given coefficient and offset. &reftitle.parameters; &gd.image.description; matrix A 3x3 matrix: an array of three arrays of three floats. div The divisor of the result of the convolution, used for normalization. offset Color offset. &reftitle.returnvalues; &return.success; &reftitle.examples; ]]> &example.outputs; Output of example : Embossing the PHP.net logo ]]> &example.outputs; Output of example : Gaussian blur &reftitle.notes; ¬e.bundled.gd; &reftitle.seealso; imagefilter