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10.3390/rs17244048
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Article

Quality Assessment of Despeckling Filters Based on the Analysis of Ratio Images

by
Rubén Darío Vásquez-Salazar
1,
William S. Puche
1,
Alejandro C. Frery
2 and
Luis Gómez
3,*
1
Faculty of Engineering, Politécnico Colombiano Jaime Isaza Cadavid, 48th Av, 7-151, Medellín 050022, Colombia
2
School of Mathematics and Statistics, Victoria University of Wellington, Wellington 6140, New Zealand
3
Electronic Engineering and Automatic Control Department, IUCES, Universidad de Las Palmas de Gran Canaria, 35001 Las Palmas de Gran Canaria, Spain
*
Author to whom correspondence should be addressed.
Remote Sens. 2025, 17(24), 4048; https://doi.org/10.3390/rs17244048
Submission received: 31 October 2025 / Revised: 5 December 2025 / Accepted: 15 December 2025 / Published: 17 December 2025
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Abstract

We present a quantitative and qualitative evaluation of despeckling filters based on a set of Haralick-derived features and the Jensen–Shannon Divergence obtained from ratio images. To that aim, we propose a normalized composite index, called the Texture-Divergence Measurement (TDM), that describes the statistical and structural behavior of the filtered images. Complementary qualitative analysis using Image Horizontal Visibility Graphs (IHVGs) confirms the results of the proposed metric. The combination of the proposed TDM metric and IHVG visualization provides a robust framework for assessing despeckling performance from both statistical and structural perspectives.
Keywords: Synthetic Aperture Radar; speckle; remote sensing; ratio images; Haralick features Synthetic Aperture Radar; speckle; remote sensing; ratio images; Haralick features

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MDPI and ACS Style

Vásquez-Salazar, R.D.; Puche, W.S.; Frery, A.C.; Gómez, L. Quality Assessment of Despeckling Filters Based on the Analysis of Ratio Images. Remote Sens. 2025, 17, 4048. https://doi.org/10.3390/rs17244048

AMA Style

Vásquez-Salazar RD, Puche WS, Frery AC, Gómez L. Quality Assessment of Despeckling Filters Based on the Analysis of Ratio Images. Remote Sensing. 2025; 17(24):4048. https://doi.org/10.3390/rs17244048

Chicago/Turabian Style

Vásquez-Salazar, Rubén Darío, William S. Puche, Alejandro C. Frery, and Luis Gómez. 2025. "Quality Assessment of Despeckling Filters Based on the Analysis of Ratio Images" Remote Sensing 17, no. 24: 4048. https://doi.org/10.3390/rs17244048

APA Style

Vásquez-Salazar, R. D., Puche, W. S., Frery, A. C., & Gómez, L. (2025). Quality Assessment of Despeckling Filters Based on the Analysis of Ratio Images. Remote Sensing, 17(24), 4048. https://doi.org/10.3390/rs17244048

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