Visual enhancement of unmixed multispectral imagery using adaptive smoothing
By: G.P. Lemeshewsky
Edited by: Z.-U. Rahman, R.A. Schowengerdt, and S.E. Reichenbach
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Abstract
Adaptive smoothing (AS) has been previously proposed as a method to smooth uniform regions of an image, retain contrast edges, and enhance edge boundaries. The method is an implementation of the anisotropic diffusion process which results in a gray scale image. This paper discusses modifications to the AS method for application to multi-band data which results in a color segmented image. The process was used to visually enhance the three most distinct abundance fraction images produced by the Lagrange constraint neural network learning-based unmixing of Landsat 7 Enhanced Thematic Mapper Plus multispectral sensor data. A mutual information-based method was applied to select the three most distinct fraction images for subsequent visualization as a red, green, and blue composite. A reported image restoration technique (partial restoration) was applied to the multispectral data to reduce unmixing error, although evaluation of the performance of this technique was beyond the scope of this paper. The modified smoothing process resulted in a color segmented image with homogeneous regions separated by sharpened, coregistered multiband edges. There was improved class separation with the segmented image, which has importance to subsequent operations involving data classification.
Suggested Citation
Lemeshewsky, G., 2004, Visual enhancement of unmixed multispectral imagery using adaptive smoothing, in Proceedings of SPIE - The International Society for Optical Engineering, v. 5438, Orlando, FL, 15 April 2004 through 16 April 2004, p. 252-262, https://doi.org/10.1117/12.543109.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Visual enhancement of unmixed multispectral imagery using adaptive smoothing |
| DOI | 10.1117/12.543109 |
| Volume | 5438 |
| Year Published | 2004 |
| Language | English |
| Larger Work Title | Proceedings of SPIE - The International Society for Optical Engineering |
| First page | 252 |
| Last page | 262 |
| Conference Title | Visual Information Processing XIII |
| Conference Location | Orlando, FL |
| Conference Date | 15 April 2004 through 16 April 2004 |