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A multiscale texture analysis procedure for improved forest stand classification

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Abstract:

Image texture is a complex visual perception. With the ever-increasing spatial resolution of remotely sensed data, the role of image texture in image classification has increased. Current approaches to image texture analysis rely on a single band of spatial information to characterize texture. This paper presents a multiscale approach to image texture where first and second-order statistical measures were derived from different sizes of processing windows and were used as additional information in a supervised classification. By using several bands of textural information processed with different window sizes (from 5×5 to 15×15) the main forest stands in the image were improved up to a maximum of 40%. A geostatistical analysis indicated that there was no single window size that would adequately characterize the range of textural conditions present in this image. A number of different statistical texture measures were compared for this image. While all of the different texture measures provided a degree of improvement (from 4 to 13% overall), the multiscale approach achieved a higher degree of classification accuracy regardless of which statistical procedure was used. When compared with single band texture measures, the level of overall improvement varied between 4 and 8%. The results indicate that this multiscale approach is an improvement over the current single band approach to analysing image texture.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/0143116042000192367

Affiliations: 1: Department of Geography The University of Lethbridge Lethbridge Alberta Canada T1K 3M4, Email: craig.coburn@uleth.ca 2: Department of Geography Simon Fraser University Burnaby British Columbia Canada V5A 1S6

Publication date: October 1, 2004

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