Disease›Diseased Area Fraction
Diseased Area Fraction
Quantify the fraction of leaf or canopy area showing disease symptoms — brown spots, necrosis, yellow halos, and rust lesions — using HSV colour-space thresholding. Results include a colour-coded overlay and per-lesion-type breakdown.
1
Plant Mask
HSV green filter
2
Lesion Class
HSV thresholds
3
Area Fraction
lesion / plant
4
Overlay
colour-coded map
Images
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JPEG, PNG, WEBP — any browser-supported format
Colour-based method. Lesion detection relies on HSV colour thresholds. Works best on close-up leaf images with consistent lighting. For mixed canopy images, results reflect relative symptom area.
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Upload RGB leaf or canopy images. Close-up shots of individual leaves give the most accurate lesion fraction estimates.