Indonesian Journal of Electrical Engineering and Computer Science
Vol 24, No 3: December 2021

Integrated NIR-HE based SPOT-5 image enhancement method for features preservation and edge detection

Farizuwana Akma Zulkifle (Universiti Teknologi MARA)
Rohayanti Hassan (Universiti Teknologi Malaysia)
Mohammad Nazir Ahmad (Universiti Kebangsaan Malaysia)
Shahreen Kasim (Universiti Tun Hussein Onn Malaysia)
Tole Sutikno (Universitas Ahmad Dahlan)
Shahliza Abd Halim (Universiti Teknologi Malaysia)



Article Info

Publish Date
01 Dec 2021

Abstract

Recently, many researchers have directed their attention to methods of predicting shorelines by the use of multispectral images. Thus, a simple and optimised method using image enhancements is proposed to improve the low contrast of the Satellite pour l'Observation de la Terre-5 (SPOT-5) images in the detection of shorelines. The near-infrared (NIR) channel is important in this study to ensure the contrast of the vegetated area and sea classification, due to the high reflectance of leaves in the near infrared wavelength region. This study used five scenes of interest to show the different results in shoreline detection. The results demonstrated that the proposed method performed in an enhanced manner as compared to current methods when dealing with the low contrast ratio of SPOT-5 images. As a result, by utilising the near-infrared histogram equalization (NIR-HE), the contrast of all datasets was efficiently restored, producing a higher efficiency in edge detection, and achieving higher overall accuracy. The improved filtering method showed significantly better shoreline detection results than the other filter methods. It was concluded that this method would be useful for detecting and monitoring the shoreline edge in Tanjung Piai.

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