average
Return an instance of TextureOp which implements a convolution from the source texture to the destination texture with the ability removing the image noise of this texture., and the kernel is a 3 * 3 matrix.
For the edge pixels of the image, the default value of missing pixels within the convolution radius is set to 0 when performing convolution operations.
Return
an instance of TextureOp which implements a convolution from the source texture to the destination.
Parameters
factor
the factor of the transparency and brightness.