Drawing objects interactively
This guide explains you how to perform an interactive objects drawing.
The interactive objects drawing method allows to directly define the structure edges by using one of the many graphic tools available. The object drawing is, not always but often, the unique approach available to get the object outline and shape. This is more evident when the images have a complex texture or a not well defined edges (e.g. EM or CT images).
See also
Overview
Vision4D offers a wide drawing tool collection, comprising the fully manual methods as well as some semi-automatic approaches. The drawing tool collection is available on the top icon panel. It's content varies according to the viewing method setting.
With the 4D viewing method on, both the Magic Wand tool as well as the tool to place simple geometric shapes, markers or spheres on the volume are available. The 2D viewing method allows access to more tools, including the Manual Drawing tool, the Magic Wand tool, and the simple geometric shapes creator tool. In this modality, the drawn objects can be also edited.
The objects created manually are, to all purposes, evaluable segments, exactly as the objects gathered using the automatic approach (Pipeline). All the available measurements can be quantified.
These objects can also be applied as free shape ROI to mask part of the volume or managed to perform evaluations about between structures' interactions and relationships (Objects Compartmentalization, Objects Co-Localization, etc.).
What is a TAG
The TAG is an object property assigned to it by the running operator (only the preprocessing operators don't use the TAGs) and used to link all the detected objects to a common collection. By default, the TAG inherits the name from the operator that has generated it. For example, the objects created by BLOB FINDER will have a TAG called “Blob Finder”. The TAG is the Vision4D's way to create a logical and hierarchical relationship between the objects without duplicating them. A single object can belong to many collections. Therefore, it can have numerous TAG's attached to it. The rule is: one object, many TAGs.
The operator's name can be edited. We strongly suggest to rename the operators according to the structure detected typology (e.g., DAPI Nuclei, GFP Cells, etc.).