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provided for them. In this way all polymorphic modifications 
of compositions are examined, i.e., compositions formed by 
viirioub complexes of intensities. The vector of the 
inter dependency between variables in composition, and is 
called the c omposition c od e. 
Properties of the model. The composition code as a method 
of description of information structures is based on sets of 
various combinations of fields. It determines relationship 
between them in various intervals of values, and therefore, 
is a differential information model of geoinformation 
structure. The code represents a complex criterion with high 
dividing capability and is good for differentiating non- 
homogeneous information structures. The maximum number of 
-lasses into which the ex amined informa11 on field can be 
di v i ied i s e.qual to 
— the code includes both general and specific features 
of classes of objects; 
— the quantitative characteristics of the image is made 
as a composition of features specific for the image; 
— the law of composition is the main criterion of 
discerning the object within the environment; 
represents the structure of the objects, not the structure 
of their boundaries. 
Application of the model. Being an abstract one the 
relationship between signals (signatures) has no limits as 
to the field of application. The areas being discerned may 
criterion values is a description of the type of 
- is the sum of 
t h e n u mb er of c omh i n a t i on s c f k 
fields as ho 
k 
z 
The composition code can be 
used as a criterion in the models of recognisino imaces 
techno1ogies 
ase it has the properties which 
remove the drawbacks of exist 
methods of recognising 
imagess 
the solving function (function of discerning 
mathematic model of description of the structure of