{ "openapi": "3.1.1", "info": { "title": "Raster Artwork to SVG API", "version": "1.0.0", "summary": "Trace logos and flat artwork into real SVG paths with a limited color palette.", "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://luminarastervectorizer.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Trace logos and flat artwork into real SVG paths with a limited color palette.", "description": "Upload a PNG, JPEG or WebP and trace sampled pixels into editable polygonal SVG paths. Set color count or a custom palette, switch to black and white, remove a border color and drop small regions. The file tool uploads to the server; Lumina Vector Lab runs locally.\n\nMethodology:\n- Exact polygonal outlines of sampled pixels; collinear vertices are removed. No bitmap is embedded in the SVG. Curves are not fitted.\n- Colors use nearest Euclidean encoded-sRGB distance. Alpha is thresholded to opaque or transparent. Small connected regions are dropped to transparency, not merged.\n- Border removal deletes every region of the most frequent opaque border color, including interior regions of that color. Ties use the first palette color.\n- At most 512 pixels per side, 2048 shapes and 60000 nodes. Use logos, icons or flat artwork; photographs may need fewer colors and lower sampling.\n- Decode the first image, auto-orient, convert to 8-bit sRGB, and downsize to 512 pixels per side before nearest-center sampling. Automatic colors reuse Lumina Palette Studio histogram extraction. Four-connected flood fill labels each region, directed boundary edges form closed rings, and even-odd fill preserves holes.", "tags": [ "apps" ], "x-mcp-tool": "lumina_raster_vectorizer", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/LuminaRasterVectorizerInput" }, "examples": { "example1": { "summary": "Trace a simple red image", "value": { "image": { "filename": "sample.png", "contentType": "image/png", "contentBase64": "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgAQMAAABJtOi3AAAABlBMVEX/////AADrWueTAAAAEklEQVQI12NgIBb8/09dgjgAAPcnH+GApkH4AAAAAElFTkSuQmCC" } } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/LuminaRasterVectorizerResult" } } } }, "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" } } } } } }, "LuminaRasterVectorizerInput": { "type": "object", "additionalProperties": false, "properties": { "image": { "title": "Image (PNG, JPEG or WebP; 8 MB, 16 MP maximum)", "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" } } }, "mode": { "title": "Tracing mode", "type": "string", "enum": [ "color", "mono" ], "default": "color" }, "colors": { "title": "Automatic color count", "type": "number", "minimum": 2, "maximum": 16, "default": 6 }, "resolution": { "title": "Longest sampled side (pixels)", "type": "string", "enum": [ "64", "128", "256", "384", "512" ], "default": "256" }, "threshold": { "title": "Black / white threshold", "type": "number", "minimum": 0, "maximum": 255, "default": 128 }, "alpha": { "title": "Minimum visible alpha", "type": "number", "minimum": 1, "maximum": 255, "default": 128 }, "minArea": { "title": "Drop regions smaller than this pixel count", "type": "number", "minimum": 0, "maximum": 256, "default": 4 }, "background": { "title": "Background", "type": "string", "enum": [ "keep", "border" ], "default": "keep" }, "palette": { "title": "Custom HEX palette (optional; 2–16 colors)", "type": "string", "maxLength": 160, "default": "" } }, "required": [ "image" ] }, "LuminaRasterVectorizerResult": { "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", "shapes", "holes", "nodes", "dropped", "background", "palette", "svg" ], "properties": { "width": { "type": "integer" }, "height": { "type": "integer" }, "shapes": { "type": "integer" }, "holes": { "type": "integer" }, "nodes": { "type": "integer" }, "dropped": { "type": "integer" }, "background": { "type": [ "string", "null" ] }, "palette": { "type": "array", "items": { "type": "string" } }, "svg": { "type": "string" } } }, "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" } } } } } } } }