Sobel Edge Detection

Specialized direction-dependent edge detection
Horizontal
name: horizontal
type: boolean
default: True
Vertical
name: vertical
type: boolean
default: True
Keep Sign
Keep negative values in result; when off, the absolute value of the result is used instead.
name: keep-sign
type: boolean
default: True
pads: input output
parent-class: GeglOperationAreaFilter
categories: edge-detect
OpenCL
