Definiens Developer 7

Definiens Developer 7 - User Guide
2 Basic Concepts
2.7 Image Object Level
A scene, representing an image, is segmented into image objects during the process of
image analysis. Image objects are organized into image object levels. An image object
level serves as an internal working area for the image analysis.
Scene on page 22
Figure 10: Each image object level consist of a layer of image objects.
During image analysis multiple image object levels can be created and layered above
the basic pixel level. Two or more image object levels build an image object hierarchy.
Image Object Hierarchy
on page 26
Note
Keep in mind the important difference between image object levels and image layers.
Image layers represent the data already existing in the image when it is first imported.
In contrast, image object levels store image objects, which represent the data. Thus,
they serve as internal working areas.
An image object level can be created by segmentation from the underlying pixel level or
from an existing image object level. In addition, you can create an image object level by
duplicating an existing image object level.
Image objects are stored in image object levels. Image object related operations like
classification, reshaping and information extraction are done within image object levels.
Thus, image object levels serve as internal working areas of the image analysis.
Every image object is linked to its neighbors. Together the image objects perform a
cognition network, which enables access to the context of each image object.
2.8 Feature
In Definiens software, a feature is an attribute that represents certain information
concerning objects of interest, for example measurements, attached data or values.
There are two major types of features:
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