کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
496303 862856 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel approach for measuring hyperspectral similarity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
A novel approach for measuring hyperspectral similarity
چکیده انگلیسی

Hyperspectral measures are used to capture the degree of similarity between two spectra. Spectral angle mapper (SAM) is an example of such measures. SAM similarity values range from 0 to 1. These values do not indicate whether the two spectra are similar or not. A static similarity threshold is imposed to recognize similar and dissimilar spectra. Adjusting such threshold is a troublesome process. To overcome this problem, the proposed approach aims to develop learnable hyperspectral measures. This is done through using hyperspectral measures values as similarity patterns and employing a classifier. The classifier acts as an adaptive similarity threshold. The derived similarity patterns are flexible, as they are able to capture the specific notion of similarity that is appropriate for each spectral region. Two similarity patterns are proposed. The first pattern is the cosine similarity vector for the second spectral derivative pair. The second pattern is a composite vector of different similarity measures values. The proposed approach is applied on full hyperspectral space and subspaces. Experiments were conducted on a challenging benchmark dataset. Experimental results showed that, classifications based on second patterns were far better than first patterns. This is because first patterns were concerned only with the geometrical features of the spectral signatures, while second patterns combined various discriminatory features such as: orthogonal projections information, correlation coefficients, and probability distributions produced by the spectral signatures. The proposed approach results are statistically significant. This implies that using simple learnable measures outperforms complex and manually tuned techniques used in classification.

Figure optionsDownload as PowerPoint slideHighlights
► The proposed approach (learnable hyperspectral measures) is a replacement of static-threshold hyperspectral similarity measure.
► The proposed approach used hyperspectral measures values as novel and flexible similarity patterns.
► The similarity patterns are classified by SVM that acts as adaptive similarity threshold.
► Experimental results of the proposed approach are statistically significant.
► The objective of this work is relaxing the extensive expert intervention to adjust hyperspectral measures thresholds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soft Computing - Volume 12, Issue 10, October 2012, Pages 3115–3123
نویسندگان
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