{ "openapi": "3.1.1", "info": { "title": "Photo Tone Curves & Profile Processor API", "version": "1.0.0", "summary": "Apply levels, RGB curves and white balance, or reuse a Lumina photo profile.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://luminatoneprocessor.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Apply levels, RGB curves and white balance, or reuse a Lumina photo profile.", "description": "Develop a photo with black and white points, gamma, five-point master and RGB curves, and linear-light white-balance gains. Download a transparent PNG and reusable settings profile, or paste a profile saved from Lumina.\n\nMethodology:\n- Auto-oriented, display-referred 8-bit sRGB analysis. Fully transparent pixels are excluded; other pixels count equally.\n- Luma is rounded 0.2126 R + 0.7152 G + 0.0722 B. Clipping counts any channel at or below 2, or at or above 253. This does not measure sensor exposure or recover clipped RAW data.\n- A supplied Lumina profile overrides all manual fields. Otherwise apply linear-light RGB gains, existing Develop exposure/contrast/saturation, encoded-sRGB levels and gamma, master curve, then channel curves. Five fixed inputs are interpolated with straight segments; outputs may be non-monotonic.\n- Gamma uses normalizedInput^(1/gamma). PNG retains the source alpha and omits source metadata. Profiles contain only adjustments and tone settings; camera PP3, RAW and ICC profiles are not supported.", "tags": [ "apps" ], "x-mcp-tool": "lumina_tone_processor", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/LuminaToneProcessorInput" }, "examples": { "example1": { "summary": "Gentle contrast curve", "value": { "image": { "filename": "sample.png", "contentType": "image/png", "contentBase64": "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgAQMAAABJtOi3AAAABlBMVEX/////AADrWueTAAAAEklEQVQI12NgIBb8/09dgjgAAPcnH+GApkH4AAAAAElFTkSuQmCC" }, "master": "0,50,128,206,255" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/LuminaToneProcessorResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "LuminaToneProcessorInput": { "type": "object", "additionalProperties": false, "properties": { "image": { "title": "Image (PNG, JPEG or WebP; up to 8 MB and 16 MP)", "type": "object", "description": "Upload as {filename, contentType?, contentBase64}. Max 7813 KiB. Accepts .png,.jpg,.jpeg,.webp.", "additionalProperties": false, "required": [ "filename", "contentBase64" ], "properties": { "filename": { "type": "string" }, "contentType": { "type": "string" }, "contentBase64": { "type": "string" } } }, "profile": { "title": "Lumina profile JSON (optional; overrides all manual fields)", "type": "string", "maxLength": 64000, "default": "" }, "black": { "title": "Input black", "type": "number", "minimum": 0, "maximum": 254, "default": 0 }, "white": { "title": "Input white", "type": "number", "minimum": 1, "maximum": 255, "default": 255 }, "gamma": { "title": "Midtone gamma", "type": "number", "minimum": 0.2, "maximum": 5, "default": 1 }, "exposure": { "title": "Exposure (EV)", "type": "number", "minimum": -3, "maximum": 3, "default": 0 }, "contrast": { "title": "Contrast", "type": "number", "minimum": -100, "maximum": 100, "default": 0 }, "saturation": { "title": "Saturation", "type": "number", "minimum": -100, "maximum": 100, "default": 0 }, "redGain": { "title": "Red linear-light gain", "type": "number", "minimum": 0.25, "maximum": 4, "default": 1 }, "greenGain": { "title": "Green linear-light gain", "type": "number", "minimum": 0.25, "maximum": 4, "default": 1 }, "blueGain": { "title": "Blue linear-light gain", "type": "number", "minimum": 0.25, "maximum": 4, "default": 1 }, "master": { "title": "Master curve outputs at 0,64,128,192,255", "type": "string", "maxLength": 40, "default": "0,64,128,192,255" }, "red": { "title": "Red curve outputs at 0,64,128,192,255", "type": "string", "maxLength": 40, "default": "0,64,128,192,255" }, "green": { "title": "Green curve outputs at 0,64,128,192,255", "type": "string", "maxLength": 40, "default": "0,64,128,192,255" }, "blue": { "title": "Blue curve outputs at 0,64,128,192,255", "type": "string", "maxLength": 40, "default": "0,64,128,192,255" } }, "required": [ "image" ] }, "LuminaToneProcessorResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "width", "height", "artifact", "profile", "analysis" ], "properties": { "width": { "type": "integer" }, "height": { "type": "integer" }, "artifact": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "profile": { "type": "object", "additionalProperties": false, "required": [ "format", "version", "name", "adjustments", "development" ], "properties": { "format": { "const": "lumina-profile" }, "version": { "const": 1 }, "name": { "type": "string", "maxLength": 80 }, "adjustments": { "type": "object", "additionalProperties": false, "required": [ "exposure", "contrast", "highlights", "shadows", "temperature", "tint", "saturation", "vibrance", "fade", "vignette", "sharpen", "denoise" ], "properties": { "exposure": { "type": "number", "minimum": -3, "maximum": 3 }, "contrast": { "type": "number", "minimum": -100, "maximum": 100 }, "highlights": { "type": "number", "minimum": -100, "maximum": 100 }, "shadows": { "type": "number", "minimum": -100, "maximum": 100 }, "temperature": { "type": "number", "minimum": -100, "maximum": 100 }, "tint": { "type": "number", "minimum": -100, "maximum": 100 }, "saturation": { "type": "number", "minimum": -100, "maximum": 100 }, "vibrance": { "type": "number", "minimum": -100, "maximum": 100 }, "fade": { "type": "number", "minimum": 0, "maximum": 100 }, "vignette": { "type": "number", "minimum": 0, "maximum": 100 }, "sharpen": { "type": "number", "minimum": 0, "maximum": 100 }, "denoise": { "type": "number", "minimum": 0, "maximum": 100 } } }, "development": { "type": "object", "additionalProperties": false, "required": [ "black", "white", "gamma", "gains", "curves" ], "properties": { "black": { "type": "integer", "minimum": 0, "maximum": 254 }, "white": { "type": "integer", "minimum": 1, "maximum": 255 }, "gamma": { "type": "number", "minimum": 0.2, "maximum": 5 }, "gains": { "type": "array", "minItems": 3, "maxItems": 3, "items": { "type": "number", "minimum": 0.25, "maximum": 4 } }, "curves": { "type": "object", "additionalProperties": false, "required": [ "master", "red", "green", "blue" ], "properties": { "master": { "type": "array", "minItems": 5, "maxItems": 5, "items": { "type": "integer", "minimum": 0, "maximum": 255 } }, "red": { "type": "array", "minItems": 5, "maxItems": 5, "items": { "type": "integer", "minimum": 0, "maximum": 255 } }, "green": { "type": "array", "minItems": 5, "maxItems": 5, "items": { "type": "integer", "minimum": 0, "maximum": 255 } }, "blue": { "type": "array", "minItems": 5, "maxItems": 5, "items": { "type": "integer", "minimum": 0, "maximum": 255 } } } }, "hsl": { "type": "object", "additionalProperties": false, "description": "Optional HSL color mixer. Bands: reds, oranges, yellows, greens, aquas, blues, purples, magentas. Hue ±100 = ±30°, saturation and luminance −100…100.", "properties": { "hue": { "type": "array", "minItems": 8, "maxItems": 8, "items": { "type": "number", "minimum": -100, "maximum": 100 } }, "saturation": { "type": "array", "minItems": 8, "maxItems": 8, "items": { "type": "number", "minimum": -100, "maximum": 100 } }, "luminance": { "type": "array", "minItems": 8, "maxItems": 8, "items": { "type": "number", "minimum": -100, "maximum": 100 } } } } } } } }, "analysis": { "type": "object", "additionalProperties": false, "required": [ "bins", "visible", "transparent", "mean", "shadow", "highlight", "shadowPercent", "highlightPercent", "p01", "median", "p99" ], "properties": { "bins": { "type": "object", "additionalProperties": false, "required": [ "luminance", "red", "green", "blue" ], "properties": { "luminance": { "type": "array", "minItems": 256, "maxItems": 256, "items": { "type": "integer" } }, "red": { "type": "array", "minItems": 256, "maxItems": 256, "items": { "type": "integer" } }, "green": { "type": "array", "minItems": 256, "maxItems": 256, "items": { "type": "integer" } }, "blue": { "type": "array", "minItems": 256, "maxItems": 256, "items": { "type": "integer" } } } }, "visible": { "type": "integer" }, "transparent": { "type": "integer" }, "mean": { "type": "number" }, "shadow": { "type": "integer" }, "highlight": { "type": "integer" }, "shadowPercent": { "type": "number" }, "highlightPercent": { "type": "number" }, "p01": { "type": "integer" }, "median": { "type": "integer" }, "p99": { "type": "integer" } } } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }