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Raster Vectorizer QGIS 4 compatibility
Not QGIS 4 ready Active
Not yet — the latest version declares max QGIS version 3.99.0, so it is not offered to QGIS 4 users.
Vectorize scanned topographic maps using interactive HSV colour-range classification
About
Converts scanned raster maps (JPEG/PNG/GeoTIFF) into polygon vector layers. Workflow: 1. Draw a rectangle on the map to sample colours 2. K-means auto-clustering splits the region into colour groups 3. Adjust HSV ranges and tolerance per class 4. Run: median pre-filter → HSV classification → morphological clean-up → GDAL Polygonize 5. Result: a polygon vector layer with class_id and class_name attributes Key features: - HSV colour space matching (perceptually uniform, easy to tune) - K-means auto-classification (2–25 clusters) - Median filter preprocessing (removes JPEG noise without blurring edges) - Morphological opening/closing (removes specks, fills gaps) - Handles non-standard GeoTransform (rotated/flipped rasters via GDAL Warp) - Live preview overlay while editing HSV ranges - Export/import colour classes as JSON - SciPy optional (NumPy fallback for all operations) Developed as part of a research project under the supervision of Pavel P. Lepekhin (Лепехин Павел Павлович).
| Author | Киноварь |
|---|---|
| Downloads | 463 |
| Latest version | 0.1.0 (experimental) |
| Last updated | 2026-05-31 (137 days ago) |
| Min QGIS | 3.16.0 |
| Max QGIS | 3.99.0 |
| QGIS 4 ready | No |
| Maintenance | Active |
| Category | Raster & terrain |
| Tags | classification, raster, polygonize, topographic, color, hsv, morphology, digitize, vectorize |
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Maintenance: Active = updated within 1 year, Quiet = 1–3 years, Likely abandoned = over 3 years.