{
  "type": "Feature",
  "stac_version": "1.1.0",
  "stac_extensions": [
    "https://stac-extensions.github.io/mlm/v1.4.0/schema.json"
  ],
  "id": "CHRIS-PROBA1",
  "geometry": null,
  "bbox": null,
  "properties": {
    "datetime": "2026-06-26T00:00:00Z",
    "description": "Cloud and cloud-shadow segmentation for CHRIS/PROBA-1 imagery. Two-model ensemble (RegNetY-004 + ConvNeXtV2-nano) finetuned on RGBN bands, unified for DN and TOA inputs.",
    "mlm:name": "CHRIS-PROBA1 cloud segmentation (unified)",
    "mlm:architecture": "U-Net ensemble (RegNetY-004 + ConvNeXtV2-nano)",
    "mlm:framework": "pytorch",
    "mlm:framework_version": "2.x",
    "mlm:tasks": ["semantic-segmentation"],
    "mlm:input": [
      {
        "name": "RGBN patch",
        "bands": ["Red", "Green", "Blue", "NIR"],
        "input": {
          "shape": [-1, 4, -1, -1],
          "dim_order": ["batch", "channel", "height", "width"],
          "data_type": "float32"
        },
        "norm_type": "z-score",
        "description": "Four-band stack (R, G, B, NIR). Dynamic per-tile z-score is applied internally."
      }
    ],
    "mlm:output": [
      {
        "name": "class map",
        "tasks": ["semantic-segmentation"],
        "result": {
          "shape": [-1, -1, -1],
          "dim_order": ["batch", "height", "width"],
          "data_type": "uint8"
        },
        "classification:classes": [
          {"value": 0, "name": "clear"},
          {"value": 1, "name": "thick_cloud"},
          {"value": 2, "name": "thin_cloud"},
          {"value": 3, "name": "shadow"},
          {"value": 99, "name": "nodata"}
        ]
      }
    ]
  },
  "links": [],
  "assets": {
    "load": {
      "href": "https://huggingface.co/isp-uv-es/CHRIS-PROBA1/resolve/main/load.py",
      "type": "text/x-python",
      "roles": ["mlm:source_code"],
      "title": "mlstac loader"
    },
    "regnety": {
      "href": "https://huggingface.co/isp-uv-es/CHRIS-PROBA1/resolve/main/regnety.ckpt",
      "type": "application/octet-stream",
      "roles": ["mlm:model", "mlm:weights"],
      "title": "RegNetY-004 checkpoint"
    },
    "convnextv2": {
      "href": "https://huggingface.co/isp-uv-es/CHRIS-PROBA1/resolve/main/convnextv2.ckpt",
      "type": "application/octet-stream",
      "roles": ["mlm:model", "mlm:weights"],
      "title": "ConvNeXtV2-nano checkpoint"
    }
  }
}