ene 
ts, whose 
assumes 
format 
)S Data 
each of 
the 
F the next 
NT7 are 
respec- 
NT6 is 
ifica- 
on by 
had been 
S all 
juipment. 
-and- 
ter in 
the 
(in row 
ards 
of all 
nd stored 
ape NT6 
cording 
the 
d data. 
hey will 
fore the 
ation. 
(see 
deter- 
NT6 and 
Formation 
sifiable 
truth" 
)jixel 
.atements 
total 
  
DIMIC-S3H 
- L NT5 
(MAIN PROGRAM) 
NT6 
  
  
  
REALDA 
NIT 
  
  
  
   
  
  
Y NTH NT5 
PEFORM 
  
  
Digital yes NTU 
Picture 
? 
no 
DIGITS 
  
  
  
  
Fig. 6: Computer program flow chart: Digital image classi- 
fication by the Separating Hyperplanes method. 
The subroutines DIGITS and ANALOG are for the production of pictures. 
While DIGITS may be called to print out a "picture" similar to the synthetic 
4-class (30 x 50) "scene" of Fig. 7,9ANALOG only produces an input (magnetic 
tape NT7) to a display or film recording equipment as already mentioned. 
4. ADVANTAGES OF THE SEPARATING HYPERPLANES METHOD 
The most important advantage of the Separating Hyperplanes method of digi- 
tal multispectral image classification over the Maximum Likelihood method is in 
the fact that it is not influenced by the statistical properties of the classi- 
fication data. For a demonstration, Landsat MSS data of an area near the city 
of Hannover, West Germany, were classified by both methods. 
65