Apply Laplacian filter to image.

input A 4-D ([N, H, W, C]) Tensor.
ksize A scalar Tensor. Kernel size.
mode A string. One of "CONSTANT", "REFLECT", or "SYMMETRIC" (case-insensitive). Default "CONSTANT".
constant_values A scalar, the pad value to use in "CONSTANT" padding mode. Must be same type as input. Default 0.
name A name for the operation (optional).

A 4-D ([N, H, W, C]) Tensor.