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Abstract

The improved spatial resolution of existing and future sensors gives the possibility to change from pixel to pixel classification methods to a field by field classification i.e. per field classification. This paper describes a preparation for a field extraction procedure, using a combination of non-statistical and statistical filtering methods. This will provide the classifier with the clearest field definition. The image must be smoothed in such a way that the field borders are preserved, the fields themselves are smoothed. The advantage of the method described here has probably more applications besides being only a preparation of a field extraction procedure. It will very probably lead toward more accurate pixel by pixel classification in reducing the in-field variance of the smoothed images. As will be shown, a 3 x 3 pixel dimension can serve very well as frame for an operator in a Landsat Thematic Mapper scene with a ground resolution of 30 by 30 meters and for the a "Systeme Probatoire d'Observation de la Terre" (SPOT) with a 10 by 10 meters ground resolution (panchromatic channel, simulated data). Adaptation of the method to extraterrestrial images seems to be evident.

Additional information

Authors: STAKENBORG J H T JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: WORKSHOP AND ADVANCED IMAGE PROCESSING AND PLANETOLOGICAL APPLICATIONS, VULCANO (ITALY), SEPT. 16-18, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32337 ORA
Availability: Can be ordered online
Record Number: 1989124017100 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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