A procedure for semi-automatic segmentation in OBIA based on the maximization of a comparison index

In an Object Based Image Analysis Classification (OBIA) process, the quality of the classification results are highly dependent on segmentation. However, a high number of the studies that make use of an OBIA process find the segmentation parameters by making use of trial-and-error methods. It is clear that a lack of a structured procedure to determine the segmentation parameters produces unquantified errors in the classification. This paper aims to quantify the effects of using a semi-automatic approach to determine optimal segmentation parameters. To this end, an OBIA process is performed to classify land cover types produced by both a manual and an automatic segmentation. Even though the classification using the manual segmentation outperforms the automatic segmentation, the difference is only 2%. Since the automatic segmentation is performed with optimal parameters, a procedure to accurately determine those parameters must be performed to minimize the error produced by a misjudgment in the segmentation step. © 2014 Springer International Publishing.

• Autore principale: Auquilla Sangolquí, Andrés Vinicio (author)
• Altri autori: Vanegas Peralta, Pablo Fernando (author)
• Natura: article
• Pubblicazione: 2014
• Soggetti: Classification; Comparison Index; Obia; Segmentation; Segmentation Parameters; Support Vector Machines
• Accesso online: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904895540&doi=10.1007%2f978-3-319-09144-0_25&partnerID=40&md5=8c65e25e306040fa7279ce7bd142e647; http://dspace.ucuenca.edu.ec/handle/123456789/22141