742 
Input 
Geometric Co-ordinate 
Conversion 
Image Display 
Training 
Statistics 
Feature Extraction 
Classification 
Output 
TABLE III 
FUNCTIONS OF LARSYS 
Computer compatible tapes with up to 
twenty-four channel input from satellite 
and airborne scanners 
Preprocessing 
Nearest neighbour rule for line genera 
tion 
Black and white display with light pen 
Magnification and grid overlays 
Interactive light pen selection of train 
ing areas 
Co-ordinate entries from cards 
Spectral signatures 
Graphical data displays of clusters and 
histograms 
Variety of algorithms available 
Clustering and/or supervised methods 
Usually maximum likelihood algorithm 
Algorithms easily changed 
Digital theme prints 
Video black and white display 
Film recorder