Home Spectral Descriptors Virtual Descriptors  
See also: Background Information on Spectral Descriptors, Predefined Spectral Descriptors, Spectral Descriptor Editor, IGF Descriptor, How to Create Classifiers


Virtual Descriptors 

In addition to the predefined descriptors ImageLab supports "virtual descriptors" which are arithmetic combinations of several specified descriptors. In order to define a virtual descriptor you have to click the virtual descriptor button () and enter a simple mathematical formula based on the specified descriptors ("DCxxx"). The formula can contain the following operators: + (addition)As an example, the following formula combines the descriptors DC001, DC004 and DC003 to give a new (virtual) descriptor: DC1*(DC4+DC3). Please note that the formula may use the descriptor identifiers without any leading zeros (i.e. "DC003" is equal to "DC3").
