FillingTransform

FillingTransform[image]
gives a version of image with all extended minima filled.

fills extended minima in regions where at least one corresponding element of marker is nonzero.

fills only extended minima of depth h or less.

An extended minimum is a connected set of pixels surrounded by pixels which all have a greater value than the pixels in the set.

FillingTransform[image] fills all extended minima by lifting their values to the lowest value found among the surrounding pixels.

FillingTransform by default treats all eight pixels surrounding a given pixel as adjacent.

In FillingTransform, marker can be given as a matrix or an image of the same dimensions as image.

The option setting CornerNeighbors->False treats only the four pixels in the coordinate directions as adjacent.

FillingTransform takes a Padding option. The default setting is Padding, corresponding to a black background.

For grayscale images, FillingTransform[image, h, Padding->1] effectively computes the h-minima transform.

Fill holes in a binary image:

Out[1]=

Use a marker to specify the holes to be filled:

Compute the h-min transform of a grayscale image by filling shallow dark regions:

Use hole-filling as a preprocessing step for image segmentation:

Remove background features from an astronomical image:

Find the innermost components in a binary image:

Use dilated innermost components to fill the innermost holes:

Create an artistic effect by extracting areas that have local minima: