`sobel`

calculates the first, second, third, or mixed image
derivatives of an image using an extended Sobel operator.

`sobel(image, dx = 1, dy = 1, k_size = 5, scale = 1)`

## Arguments

image |
An `Image` object. |

dx |
Order of the x derivative (default: 1). |

dy |
Order of the y derivative (default: 1), |

k_size |
The half-size in pixels of the kernel (default: 5). |

scale |
The scale factor for the computed derivative values (default: 1). |

## Value

image An `Image`

object.

## See also

## Author

Simon Garnier, garnier@njit.edu

## Examples