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Quantitative Assessment of Transformation Based Satellite Image Pan-sharpening Algorithms | ||
| Journal of Electrical and Computer Engineering Innovations (JECEI) | ||
| مقاله 2، دوره 8، شماره 2، مهر 2020، صفحه 161-168 اصل مقاله (791.83 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22061/jecei.2020.7191.367 | ||
| نویسندگان | ||
| F. Tabib Mahmoudi* ؛ A. Karami | ||
| Department of Geomatics, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran. | ||
| تاریخ دریافت: 12 شهریور 1398، تاریخ بازنگری: 27 دی 1398، تاریخ پذیرش: 02 اردیبهشت 1399 | ||
| چکیده | ||
| Background and Objectives: Pan-sharpening algorithms integrate the spectral capabilities of the multispectral imagery with the spatial details of the panchromatic one to obtain a product with confident spectral and spatial resolutions. Due to the large diversities in the utilized pan-sharpening algorithms, occurring spatial and spectral deviations in their results should be recognized by performing the quantitative assessment analysis. Methods: In this research, the pan-sharpened images from PCA, IHS, and Gram-Schmidt transformation based algorithms are evaluated for the multi-spectral and panchromatic images fusion of Landsat-8 OLI sensor (medium scale resolution satellite) and WorldView-2 (high-resolution satellite). Quantitative analysis is performed on the pan-sharpened products based on the Per-Pixel Deviation (PPD) measure for spectral deviation analysis and high-pass filter and edge extraction measures for analyzing the spatial correlations. Moreover, entropy and standard deviation quantitative evaluation measures are also utilized based on the pan-sharpened image content. Results: Quantitative analysis represents that increasing the spatial resolution of the utilized remote sensing data has direct impacts on the spectral, spatial, and content-based characteristics of the generated Pan-sharpened products. Gram-Schmidt transformation based pan-sharpening method has the least spectral deviations in both WorldView-2 and Landsat-8 satellite images. But, the amount of spectral, spatial and content-based quantitative measures of PCA and IHS are changing with various spatial resolutions. Conclusion: it can be said that Gram-Schmidt pan-sharpening method has the best performance in both medium-scale and high-resolution data sets based on the spectral, spatial, and content quantitative evaluation results. The IHS pan-sharpening method has better performance than the PCA method in Landsat-8 OLI data. But, by increasing the spatial resolution of the data, PCA generates pan-sharpened products with better spectral, spatial, and content based quantitative evaluation results. | ||
| کلیدواژهها | ||
| Pan-sharpening؛ Quantitative Analysis؛ Spectral Deviation؛ Transformation based Method؛ Satellite Imagery | ||
| مراجع | ||
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