SAGA.grid_filter.3: Multi Direction Lee Filter

{"id": "SAGA.grid_filter.3", "title": "Multi Direction Lee Filter", "description": "The tool searches for the minimum variance within 16 directions and applies a Lee Filter in the direction of minimum variance. The filter is edge-preserving and can be used to remove speckle noise from SAR images or to smooth DTMs. Applied to DTMs, this filter will preserve slope breaks and narrow valleys.<br/>For more details, please refer to the references. 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"schema": {"type": "number", "default": 1, "format": "double", "nullable": true}, "id": "NOISE_REL"}, "WEIGHTED": {"title": "Weighted", "description": "Weighted", "schema": {"type": "boolean", "default": false, "enum": ["true", "false"], "nullable": true}, "id": "WEIGHTED"}, "METHOD": {"title": "Method", "description": "Method", "schema": {"type": "string", "default": "noise variance given relative to mean standard deviation", "enum": ["noise variance given as absolute value", "noise variance given relative to mean standard deviation", "original calculation (Ringeler)"], "nullable": true}, "id": "METHOD"}}, "outputs": {"RESULT": {"title": "Filtered Grid", "description": "Filtered Grid", "extended-schema": {"oneOf": [{"allOf": [{"$ref": "http://zoo-project.org/dl/link.json"}, {"type": "object", "properties": {"type": {"enum": ["image/tiff", "application/x-ogc-envi", "application/x-ogc-aaigrid", "image/png"]}}}]}, {"type": "object", "required": ["value"], "properties": {"value": 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