skimage2.filters.sobel_h

skimage2.filters.sobel_h(image, mask=None)

Find the horizontal edges of an image using the Sobel transform.

Parameters:

imagendarray of shape (M, N)

Image to process.

maskndarray of shape (M, N), optional

An optional mask to limit the application to a certain area. Note that pixels surrounding masked regions are also masked to prevent masked regions from affecting the result.

Returns:

outputndarray of shape (M, N) and dtype float

The Sobel edge map.

Notes

We use the following kernel:

 1   2   1
 0   0   0
-1  -2  -1