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The Validity of the Diagnosis of Plant Leaf Infections Using Non-Destructive Optical Inspection Technique and Depth-Scan Signal Analysis

The applicability of non-destructive optical imaging technique for the diagnosis of infected leaf materials was investigated along with a depth-scan (amplitude depth profile) signal analysis. The experimented plant leaf specimens were collected from persimmon plantations and the specimens were categorized into three groups: healthy leaf specimens, infected leaf specimens, and apparently healthy leaf specimens collected from infected trees. The non-destructive diagnosis was performed using 840 nm spectral domain optical coherence tomography (SD-OCT) system. The obtained OCT results confirmed that the proposed method is capable of identifying morphological differences between healthy specimens from infected specimens and partially infected specimens. Therefore, this method has the potential to generate significant cost savings in the field of agriculture through the accurate and rapid analysis of leaf infections at an initial stage.