Classification by progressive generalization: A new automated methodology for remote sensing multichannel data

A new procedure for digital image classification is described. The procedure, labelled Classification by Progressive Generalization (CPG), was developed to avoid drawbacks associated with most supervised and unsupervised classifications. Using lessons from visual image interpretation and map making, non-recursive CPG aims to identify all significant spectral clusters within the scene to be classified. The basic principles are: (i) initial data …