Morphological postal envelope segmentation by co-occurrence matrix. - Jacques Facon; Eduardo Akira Yonekura (DRR, 2003)

Postal Envelope Segmentation by 2-D Histogram Clustering through Watershed Transform. - Eduardo Akira Yonekura; Jacques Facon (ICDAR, 2003)

2-D Histogram-Based Segmentation of Postal Envelopes. - Eduardo Akira Yonekura; Jacques Facon (SIBGRAPI, 2003)