Recognition of Meter Values

The remainder of the thesis applies the proposed Neural Abstraction Pyramid to several computer vision tasks in order to investigate the performance of this approach.This chapter deals with the recognition of postage meter values. A feed-forward Neural Abstraction Pyramid is trained in a supervised fashion to solve a pattern recognition task. The network classifies an entire digit block and thus does not need prior digit segmentation. If the block recognition is not confident enough, a second stage tries to recognize single digits, taking into account the block classifier output for a neighboring digit as context. The system is evaluated on a large database.