Browsing by Author "Dube, Timothy I."

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    Enhancing target crop discrimination: a novel shadow detection technique for RGB datasets in mixed agricultural environments
    (Mapping Sciences Institute Australia, 2025) Dube, Timothy I.; Sibanda, Mbulisi; Mafuratidze, Pride
    Shadows pose significant challenges in smallholder farming systems, where mixed cropping is common. This study introduces two novel techniques: the Hue-Intensity-Green-Blue (HIGB) difference method for shadow detection and the Light Intensity Ratio-Based (LIRB) method for shadow compensation. Their performance was tested against the C3 and NSVDI models using five accuracy metrics on RGB imagery. HIGB consistently achieved superior accuracies (77–95%) compared to NSVDI (63–84%) and C3 (69–81%) in five different crop mixtures. Both the models, HIGB and LIRB, provide an integrated, robust solution for shadow detection and compensation in heterogeneous agricultural environments.