Overview - Morphological Filter

Prerequisite: The morphological filters are only available when the Detection software solution has been purchased and is active.

Use morphological filters to prepare images for the automatic image analysis. Morphological filters analyze the shape of objects by adding pixels to an object, or by deleting them from an object.

What are morphological filters used for?

A typical task in image analysis lies in the recognition of objects in binary images. Sometimes during binarization, an object becomes split up, and is then unintentionally interpreted as two objects. In other cases, objects that touch each other need to be separated. The method with which these defects can be corrected, in preparation for the automatic object analysis, are based on the application of morphological filters. Main methods are erosion (removing part of an object), dilation (making an object larger), and also combinations and modifications of these methods.

Preconditions

Some filters in the Process > Morphological Filter menu can be applied to all image types. You will find an overview of image types that are supported here.

Some filters in the Process > Morphological Filter are initially shown grayed out. These filters work exclusively on binary images. Binarize your image by using the Image > Mode > Binary command. Then all of the morphological filters are available. You'll find step-by-step instructions on how to binarize images here.

You'll find the following filters in the Process > Morphological Filter menu.

Group 1:

These commands can be applied to all image types.

Distance Bright

Distance Dark

Ultimate Erode Bright

Ultimate Erode Dark

Skeleton Bright

Skeleton Dark

Group 2:

These commands require binary images.